9-; Rev ; 8/ Single/Dual/Quad, 7MHz, ma, SOT, General Description The MAX8 family of current-feedback amplifiers combines high-speed performance, low distortion, and excellent video specifications with ultra-low-power operation in miniature packages. They operate from ±.V to ±.V dual supplies, or from a single +V supply. They require only ma of supply current per amplifier while delivering up to ±ma of output current drive. The MAX8/MAX8/MAX8/MAX8 are compensated for applications with a closed-loop gain of + (db) or greater, and provide a -db bandwidth of MHz and a.db bandwidth of 7MHz. The MAX8/MAX8/MAX8/MAX87 are compensated for applications with a + (db) or greater gain, and provide a -db bandwidth of 7MHz and a.db bandwidth of MHz. The MAX8 MAX87 feature.8%/. differential gain and phase errors, a ns settling time to.%, and a V/µs slew rate, making them ideal for highperformance video applications. The MAX8/ MAX8/MAX8/MAX8 have a low-power shutdown mode that reduces power-supply current to µa and places the outputs in a high-impedance state. This feature makes them ideal for multiplexing applications. The single MAX8/MAX8 are offered in spacesaving -pin SOT packages. Applications Portable/Battery-Powered Video/Multimedia Systems Broadcast and High-Definition TV Systems High-Speed A/D Buffers CCD Imaging Systems Medical Imaging PART MAX8 MAX8 MAX8 MAX8 MAX8 MAX8 MAX8 MAX87 NO. OF AMPS High-Definition Surveillance Video Professional Cameras Video Switching/ Multiplexing Selector Guide SHUTDOWN MODE Yes Yes No Yes No Yes No No OPTIMIZED FOR A V A V A V A V A V A V A V A V Features Ultra-Low Supply Current: ma per Amplifier Shutdown Mode Outputs Placed in High-Z Supply Current Reduced to µa Operate from a Single +V Supply or Dual ±V Supplies Wide Bandwidth 7MHz -db Small-Signal Bandwidth (MAX8/MAX8/MAX8/MAX87) V/µs Slew Rate Fast, ns Settling Time to.% Excellent Video Specifications Gain Flatness to 7MHz (MAX8/MAX8/MAX8/MAX8).8%/. Differential Gain/Phase Low Distortion: -7dBc SFDR (f C = MHz, V = Vp-p) Available in Tiny Surface-Mount Packages -Pin SOT (MAX8/MAX8) -Pin µmax (MAX8/MAX8) -Pin QSOP (MAX8/MAX87) PART MAX8EUT-T MAX8ESA TOP VIEW V EE IN+ TEMP RANGE - C to +8 C - C to +8 C SINGLE V CC Ordering Information Pin Configurations MAX8 MAX8 SOT IN- PIN- PACKAGE SOT 8 SO Ordering Information continued at end of data sheet. SHDN Pin Configurations continued at end of data sheet. TOP MARK AAAB MAX8 MAX87 Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at -8889, or visit Maxim s website at www.maxim-ic.com.
Single/Dual/Quad, 7MHz, ma, SOT, MAX8 MAX87 ABSOLUTE MAXIMUM RATINGS Supply Voltage (V CC to V EE )...V Analog Input Voltage...(V EE -.V) to (V CC +.V) Differential Input Voltage...±V SHDN Input Voltage...(V EE -.V) to (V CC +.V) Short-Circuit Duration ( to GND, V CC or V EE )...Continuous Continuous Power Dissipation (T A = +7 C) -Pin SOT (derate 7.mW/ C above +7 C)...7mW Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC ELECTRICAL CHARACTERISTICSDual Supplies 8-Pin SO (derate.88mw/ C above +7 C)...7mW -Pin µmax (derate.mw/ C above +7 C)...mW -Pin SO (derate 8.mW/ C above +7 C)...7mW -Pin QSOP (derate 8.mW/ C above +7 C)...7mW Operating Temperature Range...- C to +8 C Storage Temperature Range... C to + C Lead Temperature (soldering, s)...+ C (V CC = +V, V EE = -V, V IN + =, SHDN V; T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A = + C.) (Note ) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage Range V CM Guaranteed by CMRR test ±. ±.9 V Input Offset Voltage V OS V CM = ±. ±7 mv Input Offset-Voltage Drift TC VOS ± µv/ C Input Offset-Voltage Matching MAX8 MAX87 ± mv Input Bias Current (Positive Input) I B+ ± ±7 µa Input Bias Current (Negative Input) I B- ± ± µa Input Resistance (Positive Input) R IN+ -.V V IN+.V, -V (V IN+ - V IN- ) V 8 kω Input Resistance (Negative Input) R IN- Ω Common-Mode Rejection Ratio CMRR -.V V CM.V - -8 db, V = ±.V.8. Open-Loop Transresistance T R MΩ, V = ±.V..9 ±.7 ±. Output Voltage Swing V SW ±. ±. Output Short-Circuit Current I SC ±8 ma Output Resistance R. Ω Disabled Output Leakage Current Ω Output Current I Ω ± ± ma I (OFF) SHDN V IL, V ±V (Notes, ) ±. ±. µa SHDN Logic Low Threshold V IL (Notes, ) V CC -. V SHDN Logic High Threshold V IH (Notes, ) V CC -. V ±. V TOP VIEW SING
Single/Dual/Quad, 7MHz, ma, SOT, DC ELECTRICAL CHARACTERISTICSDual Supplies (continued) (V CC = +V, V EE = -V, V IN + =, SHDN V; T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A = + C.) (Note ) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SHDN Logic Input Bias Current I IN V EE SHDN V CC (Note ) ±. ±. µa Positive Power-Supply Rejection Ratio Negative Power-Supply Rejection Ratio PSRR+ 7 PSRR- V CC = V, V EE = -.V to -.V Operating Supply Voltage V CC/ V EE ±. ±. V Quiescent Supply Current per Amplifier Shutdown Supply Current per Amplifier V EE = -V, V CC =.V to.v MAX8_EUT.. I S All other packages.. I S(OFF) SHDN =, (Note ) 8 µa db db ma MAX8 MAX87 DC ELECTRICAL CHARACTERISTICSSingle Supply (V CC = +V, V EE =, V IN + =.V, SHDN V, R L to V CC /; T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A = + C.) (Note ) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage Range V CM. to. to.7.9 Input Offset Voltage V OS V CM =.V ±. ±7 mv Input Offset Voltage Drift TC VOS ± µv/ C Input Offset Voltage Matching MAX8 MAX87 ± mv Input Bias Current (Positive Input) I B+ ± ±7 V µa Input Bias Current (Negative Input) I B- ± ± µa Input Resistance (Positive Input) R IN+.V V IN+.7V, -V (V IN+ - V IN- ) V 8 kω Input Resistance (Negative Input) Common-Mode Rejection Ratio Open-Loop Transresistance Output Voltage Swing R IN- Ω CMRR.V V CM.7V - -8 db, V =.V to.8v.8. T R, V =.V to.v.7.9 V SW Ω. to. to.8.. to. to..8. to.7 MΩ V V
Single/Dual/Quad, 7MHz, ma, SOT, MAX8 MAX87 DC ELECTRICAL CHARACTERISTICSSingle Supply (continued) (V CC = +V, V EE =, V IN + =.V, SHDN V, R L to V CC /; T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A = + C.) (Note ) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Output Current I Ω ±8 ± ma Output Short-Circuit Current I SC ± ma Output Resistance R. Ω Disabled Output Leakage Current Power-Supply Rejection Ratio PSRR V CC =.V to.v 7 Quiescent Supply Current per Amplifier Shutdown Supply Current per Amplifier SHDN V I ( OFF ) IL,.V V.8V ±. ±. µa (Notes, ) V SHDN Logic-Low Threshold V CC - IL (Notes, ). V CC - SHDN Logic-High Threshold V IH (Notes, ). SHDN Logic Input Bias Current I IN SHDN V CC (Note ) ±. ±. µa Operating Supply Voltage V CC.. V MAX8_EUT.. I S All other packages.. I S(OFF) SHDN =, (Note ) V V db ma 8 µa AC ELECTRICAL CHARACTERISTICSDual Supplies (MAX8/8/8/8) (V CC = +V, V EE = -V, V IN =, SHDN V, A V = +V/V; see Table for R F and R G values; T A = + C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Small-Signal -db Bandwidth kω 8 BW (Note ) SS <.db peaking Ω 9 MHz Large-Signal -db Bandwidth BW LS V = Vp-p, MHz Bandwidth for.db Flatness 7 BW (Note ).db 7 MHz Slew Rate (Note ) SR V = V step, Rising edge Falling edge V/µs Settling Time to.% t S V = V step, ns Rise/Fall Time t R, t F V = V step, ns Spurious-Free Dynamic Range SFDR f C = MHz, V = Vp-p 7 7 dbc Second Harmonic Distortion f C = MHz, V = Vp-p -8 8 dbc Third Harmonic Distortion f C = MHz, V = Vp-p -7-7 dbc
Single/Dual/Quad, 7MHz, ma, SOT, AC ELECTRICAL CHARACTERISTICSDual Supplies (MAX8/8/8/8) (cont.) (V CC = +V, V EE = -V, V IN =, SHDN V, A V = +V/V; see Table for R F and R G values; T A = + C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Differential Phase Error Differential Gain Error Input Noise-Voltage Density Input Capacitance (Positive Input) DP DG e n NTSC NTSC f = khz IN+ Input Noise-Current Density i n f = khz IN- C IN+. pf Output Impedance Z f = khz.8 Ω Disabled Output Capacitance C (OFF) SHDN V IL, V ±V (Notes, ) pf Turn-On Time from SHDN t ON (Note ) ns Turn-Off Time to SHDN t OFF (Note ) ns Power-Up Time µs Off-Isolation SHDN V,, f = MHz db Crosstalk f = MHz, MAX8/8/8 db Gain Matching to.db f = MHz, MAX8/8/8 MHz...8. degrees % nv/ Hz pa/ Hz MAX8 MAX87 AC ELECTRICAL CHARACTERISTICSDual Supplies (MAX8/8/8/87) (V CC = +V, V EE = -V, V IN+ =, SHDN V, A V = +V/V; see Table for R F values; T A = + C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Small-Signal -db Bandwidth 9 7 BW <.db peaking (Note ) SS MHz Large-Signal -db Bandwidth BW LS V = Vp-p, 9 MHz Bandwidth for.db Flatness BW (Note ).db MHz Slew Rate (Note ) Settling Time to.% t S V = V step, ns Rise/Fall Time t R and t F V = V step, ns Spurious-Free Dynamic Range SFDR f C = MHz, V = Vp-p 7 db Second Harmonic Distortion Third Harmonic Distortion Differential Phase Error SR DP V = V step, f C = MHz, V = Vp-p f C = MHz, V = Vp-p NTSC Rising edge Falling edge -7-7 -7..8 V/µs db db degrees
Single/Dual/Quad, 7MHz, ma, SOT, MAX8 MAX87 AC ELECTRICAL CHARACTERISTICSDual Supplies (MAX8/8/8/87) (cont.) (V CC = +V, V EE = -V, V IN+ =, SHDN V, A V = +V/V; see Table for R F values; T A = + C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Differential Gain Error DG NTSC Input Noise-Voltage Density e n f = khz nv/ Hz IN+ Input Noise-Current Density i n f = khz IN- Input Capacitance (Positive Input).9. % pa/ Hz C IN+. pf Output Impedance Z f = khz.8 Ω Disabled Output Capacitance C (OFF) SHDN V IL, V ±V (Notes, ) pf Turn-On Time from SHDN t ON (Note ) ns Turn-Off Time to SHDN t OFF (Note ) ns Power-Up Time µs Off-Isolation SHDN V,, f = MHz - db Crosstalk f = MHz, MAX8/MAX8/MAX87 db Gain Matching to.db f = MHz, MAX8/MAX8/MAX87 MHz AC ELECTRICAL CHARACTERISTICSSingle Supply (MAX8/8/8/8) (V CC = +V, V EE =, V IN + =.V, SHDN V, A V = +V/V; see Table for R F and R G values; T A = + C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Small-Signal -db Bandwidth BW (Note ) SS <.db peaking MHz Large-Signal -db Bandwidth BW LS V = Vp-p, MHz Bandwidth for.db Flatness BW (Note ).db MHz Slew Rate (Note ) SR V = V step, Rising edge Falling edge V/µs Settling Time to.% t S V = V step, ns Rise/Fall Time t R and t F V = V step, ns Spurious-Free Dynamic Range SFDR f C = MHz, V = Vp-p 7 7 db Second Harmonic Distortion f C = MHz, V = Vp-p -8-7 dbc Third Harmonic Distortion Differential Phase Error DP f C = MHz, V = Vp-p NTSC -7-7.. dbc degrees
Single/Dual/Quad, 7MHz, ma, SOT, AC ELECTRICAL CHARACTERISTICSSingle Supply (MAX8/8/8/8) (cont.) (V CC = +V, V EE =, V IN + =.V, SHDN V, A V = +V/V; see Table for R F and R G values; T A = + C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Differential Gain Error Input Noise-Voltage Density e n f = khz nv/ Hz Input Noise-Current Density Input Capacitance (Positive Input) DG i n NTSC f = khz C IN+. pf Output Impedance Z f = khz.8 Ω Disabled Output Capacitance C (OFF) SHDN V IL,.V V.8V (Notes, ) pf Turn-On Time from SHDN t ON (Note ) ns Turn-Off Time to SHDN t OFF (Note ) ns Power-Up Time µs Off-Isolation SHDN V,, f = MHz db Crosstalk f = MHz, MAX8/MAX8/MAX8 db Gain Matching to.db f = MHz, MAX8/MAX8/MAX8 MHz IN+ IN-.. % pa/ Hz MAX8 MAX87 AC ELECTRICAL CHARACTERISTICSSingle Supply (MAX8/8/8/87) (V CC = +V, V EE =, V IN + =.V, SHDN V, A V = +V/V; see Table for R F values; T A = + C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX Small-Signal -db Bandwidth 7 BW <.db peaking (Note ) SS 7 Large-Signal -db Bandwidth BW LS V = Vp-p, Bandwidth for.db Flatness BW (Note ).db Slew Rate (Note ) SR V = V step, Rising edge 7 Falling edge 7 Settling Time to.% t S V = V step, Rise/Fall Time t R and t F V = V step, 7 Spurious-Free Dynamic Range SFDR f C = MHz, V = Vp-p 9 Second Harmonic Distortion f C = MHz, V = Vp-p -7 Third Harmonic Distortion f C = MHz, V = Vp-p - -9 Differential Phase Error DP NTSC.. UNITS MHz MHz MHz V/µs ns ns db dbc dbc degrees 7
Single/Dual/Quad, 7MHz, ma, SOT, MAX8 MAX87 AC ELECTRICAL CHARACTERISTICSSingle Supply (MAX8/8/8/87) (cont.) (V CC = +V, V EE =, V IN + =.V, SHDN V, A V = +V/V; see Table for R F values; T A = + C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Differential Gain Error Input Noise-Voltage Density e n f = khz nv/ Hz Input Noise-Current Density Input Capacitance (Positive Input) DG i n NTSC f = khz C IN+. pf Output Impedance Z f = khz.8 Ω Disabled Output Capacitance C (OFF) SHDN V IL,.V V.8V (Notes, ) pf Turn-On Time from SHDN t ON (Note ) ns Turn-Off Time to SHDN t OFF (Note ) ns Power-Up Time µs IN+ IN-.. % pa/ Hz Off-Isolation SHDN V,, f = MHz - db Crosstalk f = MHz, MAX8/MAX8/MAX87 db Gain Matching to.db f = MHz, MAX8/MAX8/MAX87 MHz Note : The MAX8_EUT is % production tested at T A = + C. Specifications over temperature limits are guaranteed by design. Note : Does not include current into the external-feedback network. Note : Over operating supply-voltage range. Note : Specification applies to MAX8/MAX8/MAX8 and MAX8. Note : The AC specifications shown are not measured in a production test environment. The minimum AC specifications given are based on the combination of worst-case design simulations along with a sample characterization of units. These minimum specifications are for design guidance only and are not intended to guarantee AC performance (see AC Testing/Performance). For % testing of those parameters, contact the factory. Typical Operating Characteristics (V CC = +V, V EE = -V, T A = + C, unless otherwise noted.) NORMALIZED GAIN (db) - - - - - MAX8 SMALL-SIGNAL GAIN vs. FREQUENCY (DUAL SUPPLIES) V IN = mvp-p A V = +V/V R F = R G = 8Ω Ω OR R F = R G = 8Ω R F = R G =.kω MAX8-87 TOCA NORMALIZED GAIN (db) - - - - - MAX8 SMALL-SIGNAL GAIN vs. FREQUENCY (SINGLE SUPPLY) V CC = +V V IN = mvp-p A V = +V/V R F = R G = 8Ω Ω OR R F = R G = 8Ω R F = R G =.kω MAX8-87 TOCB GAIN (db) - - - - - MAX8 SMALL-SIGNAL GAIN vs. FREQUENCY (DUAL SUPPLIES) V IN = mvp-p A V = +V/V R F = kω OR R F = Ω Ω R F =.kω MAX8-87 TOCD 8 TOP VIEW SING
Single/Dual/Quad, 7MHz, ma, SOT, Typical Operating Characteristics (continued) (V CC = +V, V EE = -V, T A = + C, unless otherwise noted.) GAIN (db) - - - - - MAX8 SMALL-SIGNAL GAIN vs. FREQUENCY (SINGLE SUPPLY) V CC = +V V IN = mvp-p A V = +V/V R F = kω OR R F = Ω Ω R F =.kω MAX8-87 TOCE NORMALIZED GAIN (db) - - - - - MAX8/MAX8 SMALL-SIGNAL GAIN vs. FREQUENCY (DUAL SUPPLIES) V S = ±V V IN = mvp-p A V = +V/V R F = R G = 8Ω R F = R G = Ω Ω R F = R G = kω MAX8-87AA GAIN (db) - - - - - MAX8/MAX8 SMALL-SIGNAL GAIN vs. FREQUENCY (DUAL SUPPLIES) V S = ±V V IN = mvp-p A V = +V/V R F = 7Ω R F = Ω Ω R F =.kω MAX8-87BB MAX8 MAX87 NORMALIZED GAIN (db) - - - - - MAX8 SMALL-SIGNAL GAIN vs. FREQUENCY (DUAL SUPPLIES) V S = ±V V IN = mvp-p A V = +V/V R F = R G = 7Ω R F = R G = 8Ω Ω R F = R G =.kω MAX8-87CC GAIN (db) - - - - - MAX87 SMALL-SIGNAL GAIN vs. FREQUENCY V S = ±V V IN = mvp-p A V = +V/V R F = 8Ω Ω R F = 9Ω R F =.kω MAX8-87DD GAIN (db).... -. -. -. -. -. -. MAX8 GAIN FLATNESS vs. FREQUENCY (SINGLE & DUAL SUPPLIES) V CC = +V R F = R G =.kω V S = ±V R F = R G = 8Ω V CC = +V R F = R G = 8kΩ V IN = mvp-p A V = +V/V V S = ±V R F = R G =.kω MAX8-87 TOCF GAIN (db).... -. -. -. -. -. -. MAX8 GAIN FLATNESS vs. FREQUENCY (SINGLE & DUAL SUPPLIES) V S = ±V R F = kω V IN = mvp-p A V = +V/V V S = ±V R F =.kω V CC = +V R F = kω V CC = +V R F =.kω MAX8-87 TOCH NORMALIZED GAIN (db) - - - - - MAX8 LARGE-SIGNAL GAIN vs. FREQUENCY (DUAL SUPPLIES) A V = +V/V V = Vp-p R F = R G =.kω OR R F = R G = 8Ω MAX8-87 TOCJ NORMALIZED GAIN (db) - - - - - MAX8 LARGE-SIGNAL GAIN vs. FREQUENCY (SINGLE SUPPLY) V CC = +V A V = +V/V R F = R G = 8Ω V = Vp-p OR R F = R G =.kω V = Vp-p V = Vp-p R F = R G = 8Ω Ω MAX8-87 TOCK 9
Single/Dual/Quad, 7MHz, ma, SOT, MAX8 MAX87 Typical Operating Characteristics (continued) (V CC = +V, V EE = -V, T A = + C, unless otherwise noted.) NORMALIZED GAIN (db) - - - - - MAX8 SMALL-SIGNAL GAIN vs. FREQUENCY V S = ±V V IN = mvp-p A V = +V/V R F = 7Ω R G = 8Ω A V = +V/V R F = 9Ω R G = Ω MAX8-87 TOCL GAIN (db) - - - - - MAX8 LARGE-SIGNAL GAIN vs. FREQUENCY (DUAL SUPPLIES) A V = +V/V V = Vp-p R F =.kω OR V = Vp-p R F = kω V = Vp-p R F = Ω Ω MAX8-87 TOCM GAIN (db) - - - - - MAX8 LARGE-SIGNAL GAIN vs. FREQUENCY (SINGLE SUPPLY) V CC = +V A V = +V/V V = Vp-p R F = kω OR V = Vp-p R F =.kω V = Vp-p R F = Ω Ω MA8-87 TOCN - - - MAX8 CROSSTALK vs. FREQUENCY V B = Vp-p V A MEASURED A V = +V/V R F = R G = 8Ω MAX8-87EE - - - MAX8 CROSSTALK vs. FREQUENCY V B = Vp-p V A MEASURED A V = +V/V R F =.kω MAX8-87FF - - MAX8 CROSSTALK vs. FREQUENCY V D = Vp-p V A MEASURED A V = +V/V R F = R G = 7Ω MAX8-87GG CROSSTALK (db) - -7-8 -9 R F = R G = kω CROSSTALK (db) - -7-8 -9 R F = 7Ω CROSSTALK (db) - - - -7 R F = R G =.kω - - -8 - - -9 - - - CROSSTALK (db) - - - - - -7-8 -9 MAX87 CROSSTALK vs. FREQUENCY V A = Vp-p V D MEASURED A V = +V/V R F =.kω R F = 9Ω MAX8-87HH PSRR (db) - - - - - -7-8 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY V CC (MAX8) V CC (MAX8) V EE (MAX8) V EE (MAX8) MAX8-87 TOCP PUT IMPEDANCE (Ω) PUT IMPEDANCE vs. FREQUENCY MAX8-87 TOCQ - -9....
Single/Dual/Quad, 7MHz, ma, SOT, Typical Operating Characteristics (continued) (V CC = +V, V EE = -V, T A = + C, unless otherwise noted.) VOLTAGE-NOISE DENSITY (nv/ Hz) DISTORTION (dbc)....8.....8.. - - - -7-8 VOLTAGE-NOISE DENSITY vs. FREQUENCY (INPUT REFERRED) k k k M M M G FREQUENCY (Hz) MAX8 HARMONIC DISTORTION vs. FREQUENCY (SINGLE SUPPLY) RD () RD () ND () ND () -9. MAX8 TOC MAX8 TOC7 VOLTAGE-NOISE DENSITY (nv/ Hz) DISTORTION (dbc) - - - -7-8 TOTAL VOLTAGE-NOISE DENSITY vs. FREQUENCY (INPUT REFERRED) VIN.kΩ.kΩ V k k k M M M G FREQUENCY (Hz) MAX8 HARMONIC DISTORTION vs. FREQUENCY (DUAL SUPPLIES) RD () RD () ND () -9 ND () -. MAX8 TOC MAX8 TOC8 DISTORTION (dbc) DISTORTION (dbc) - - - -7-8 MAX8 HARMONIC DISTORTION vs. FREQUENCY (DUAL SUPPLIES) RD () RD () ND (R -9 L = kω) ND () -. - - - -7-8 MAX8 HARMONIC DISTORTION vs. FREQUENCY (SINGLE SUPPLY) RD () RD () ND () ND () -9. MAX8 TOC MAX8 TOC9 MAX8 MAX87 THIRD-ORDER INTERCEPT (dbm) TWO-TONE THIRD-ORDER INTERCEPT vs. FREQUENCY f = f +.MHz MAX8 MAX8 MAX8 TOC SUPPLY CURRENT (ma).. SUPPLY CURRENT (OPERATING & SHUTDOWN) vs. TEMPERATURE SHUTDOWN SUPPLY CURRENT SUPPLY CURRENT MA8 TOC SHUTDOWN SUPPLY CURRENT (µa) PUT SWING (V) - - PUT VOLTAGE SWING vs. TEMPERATURE MA8 TOC.7 9 - - 8 TEMPERATURE ( C) - - - 8 TEMPERATURE ( C)
Single/Dual/Quad, 7MHz, ma, SOT, MAX8 MAX87 Typical Operating Characteristics (continued) (V CC = +V, V EE = -V, T A = + C, unless otherwise noted.) INPUT BIAS CURRENT (µa)..8... INPUT BIAS CURRENT vs. TEMPERATURE - - 8 TEMPERATURE ( C) I B- I B+ MA8 TOC INPUT OFFSET VOLTAGE (mv) INPUT OFFSET VOLTAGE vs. TEMPERATURE - - 8 TEMPERATURE ( C) MA8 TOC +mv IN -mv +mv -mv MAX8 SMALL-SIGNAL PULSE RESPONSE ns/div R F = kω, MAX8/87-TOC POWER-ON TRANSIENT SHUTDOWN RESPONSE TIME MAX8 LARGE-SIGNAL PULSE RESPONSE + V CC MAX8/87-TOC7 V A V = +V/V V IN+ = V DC MAX8/87-TOC8 +.V SHDN IN MAX8/87-TOC9 GND -.V GND +V V +V V GND GND -V µs/div R F = kω, V IN = V CC /, ns/div, R F = R G = 8Ω ns/div, R F = R G =.kω MAX8 LARGE-SIGNAL PULSE RESPONSE MAX8 LARGE-SIGNAL PULSE RESPONSE MAX8 SMALL-SIGNAL PULSE RESPONSE +.V IN MAX8/87-TOC +.V IN MAX8/87-TOC +mv IN MAX8/87-TOC -.V -.V -mv +V +V +mv -V -V -mv ns/div Ω, R F = R G = 8Ω ns/div, R F = R G = 8Ω ns/div, R F = R G =.kω
Single/Dual/Quad, 7MHz, ma, SOT, Typical Operating Characteristics (continued) (V CC = +V, V EE = -V, T A = + C, unless otherwise noted.) +mv IN -mv +mv -mv MAX8 SMALL-SIGNAL PULSE RESPONSE ns/div, R F = R G = 8Ω MAX8 SMALL-SIGNAL PULSE RESPONSE MAX8/87-TOC +mv IN -mv +mv -mv MAX8 SMALL-SIGNAL PULSE RESPONSE ns/div Ω, R F = R G = 8Ω MAX8 LARGE-SIGNAL PULSE RESPONSE MAX8/87-TOC MAX8 MAX87 +mv IN MAX8/87-TOC +V IN MAX8/87-TOC -mv -V +mv +V -mv -V ns/div ns/div, R F =.kω V S = ±V,, R F =.kω Pin Description MAX8/MAX8 PIN MAX8/MAX8 NAME FUNCTION SO, 7 8 SOT N.C. No Connection. Not internally connected. IN- IN+ Inverting Input Noninverting Input V EE Negative Power Supply. Connect V EE to -V or ground for single-supply operation. Amplifier Output V CC Positive Power Supply. Connect V CC to +V. SHDN Shutdown Input. Device is enabled when SHDN (V CC - V) and disabled when SHDN (V CC - V).
Single/Dual/Quad, 7MHz, ma, SOT, MAX8 MAX87 Pin Description (continued) MAX8/MAX8/MAX8/MAX8 PIN MAX8 MAX8 SO MAX8 MAX8 SO MAX8 MAX8 µmax, 7, 8, NAME V EE N.C. SHDNA 9 SHDNB FUNCTION Negative Power Supply. Connect V EE to -V or ground for single-supply operation. No Connection. Not internally connected. Shutdown Control Input for Amplifier A. Amplifier A is enabled when SHDNA (V CC - V) and disabled when SHDNA (V CC - V). Shutdown Control Input for Amplifier B. Amplifier B is enabled when SHDNB (V CC - V) and disabled when SHDNB (V CC - V). 7 INB+ Amplifier B Noninverting Input 8 INB- Amplifier B Inverting Input 7 9 B Amplifier B Output 8 V CC Positive Power Supply. Connect V CC to +V. MAX8/MAX87 PIN MAX8 MAX87 MAX8 MAX87 NAME FUNCTION SO QSOP A Amplifier A Output A Amplifier A Output INA- Amplifier A Inverting Input INA+ Amplifier A Noninverting Input INA- Amplifier A Inverting Input INA+ Amplifier A Noninverting Input V CC Positive Power Supply. Connect V CC to +V. INB+ Amplifier B Noninverting Input INB- Amplifier B Inverting Input 7 7 B Amplifier B Output 8, 9 N.C. No Connection. Not internally connected. 8 C Amplifier C Output 9 INC- Amplifier C Inverting Input INC+ Amplifier C Noninverting Input V EE Negative Power Supply. Connect V EE to -V or ground for single-supply operation. IND+ Amplifier D Noninverting Input IND- Amplifier D Inverting Input D Amplifier D Output
Single/Dual/Quad, 7MHz, ma, SOT, Detailed Description The MAX8 MAX87 are ultra-low-power currentfeedback amplifiers featuring bandwidths up to 7MHz,.dB gain flatness to 9MHz, and low differential gain (.8%) and phase (. ) errors. These amplifiers achieve ultra-high bandwidth-to-power ratios with low distortion, wide signal swing, and excellent load-driving capabilities. They are optimized for ±V supplies but also operate from a single +V supply while consuming only ma per amplifier. With ±ma output current drive capability, the devices achieve low distortion even while driving Ω loads. Wide bandwidth, low power, low differential phase and gain error, and excellent gain flatness make the MAX8 MAX87 ideal for use in portable video equipment such as cameras, video switchers, and other battery-powered applications. Their two-stage design provides higher gain and lower distortion than conventional single-stage, current-feedback topologies. This feature, combined with fast settling time, makes these devices suitable for buffering high-speed analog-to-digital converters (ADCs). The MAX8/MAX8/MAX8/MAX8 have a low-power shutdown mode that is activated by driving the amplifiers SHDN input low. Placing them in shutdown reduces quiescent supply current to µa (typ) and places amplifier outputs in a high-impedance state. These amplifiers can be used to implement a high-speed multiplexer by connecting together the outputs of multiple amplifiers and controlling the SHDN inputs to enable one amplifier and disable all the others. The disabled amplifiers present very little load (.µa leakage current and pf capacitance) to the active amplifiers output. Note that the feedback network impedance of all the disabled amplifiers must be considered when calculating the total load on the active amplifier output. Application Information Theory of Operation The MAX8 MAX87 are current-feedback amplifiers, and their open-loop transfer function is expressed as a transimpedance, V / I IN, or T Z. The frequency behavior of the open-loop transimpedance is similar to the open-loop gain of a voltage-mode feedback amplifier. That is, it has a large DC value and decreases at approximately db per octave. Analyzing the follower with gain, as shown in Figure, yields the following transfer function: where G = A VCL = + (R F / R G), and R IN = /g M Ω. At low gains, G x R IN < R F. Therefore, the closed-loop bandwidth is essentially independent of closed-loop gain. Similarly, T Z > R F at low frequencies, so that: V VIN = G = + ( RF / RG) Layout and Power-Supply Bypassing The MAX8 MAX87 have an RF bandwidth and, consequently, require careful board layout, including the possible use of constant-impedance microstrip or stripline techniques. To realize the full AC performance of these high-speed amplifiers, pay careful attention to power-supply bypassing and board layout. The PC board should have at least two layers: a signal and power layer on one side, and a large, low-impedance ground plane on the other side. The ground plane should be as free of voids as possible. With multilayer boards, locate the ground plane on a layer that incorporates no signal or power traces. Regardless of whether a constant-impedance board is used, observe the following guidelines when designing the board: Do not use wire-wrap boards. They are too inductive. Do not use breadboards. They are too capacitive. Do not use IC sockets. They increase parasitic capacitance and inductance. Use surface-mount components rather than throughhole components. They give better high-frequency performance, have shorter leads, and have lower parasitic reactances. R G V IN R IN + T R F + MAX8 MAX87 V MAX8 MAX87 V / V IN = G x [(T Z (S) / T Z (s) + G x (R IN + R F )] Figure. Current-Feedback Amplifier
Single/Dual/Quad, 7MHz, ma, SOT, MAX8 MAX87 Keep lines as short and as straight as possible. Do not make 9 turns; round all corners. Observe high-frequency bypassing techniques to maintain the amplifiers accuracy. The bypass capacitors should include a.µf to.µf ceramic capacitor between each supply pin and the ground plane, located as close to the package as possible. Place a µf ceramic capacitor in parallel with each.µf to.µf capacitor as close to them as possible. Place a µf to µf low-esr tantalum at the point of entry to the power-supply pins PC board. The power-supply trace should lead directly from the tantalum capacitor to the V CC and V EE pins. Keep PC traces short and use surface-mount components to minimize parasitic inductance. Maxim s High-Speed Evaluation Board Figures and show layouts of Maxim s high-speed single SOT and SO evaluation boards. These boards were developed using the techniques described above. The smallest available surface-mount resistors were used for feedback and back-termination to minimize their distance from the part, reducing the capacitance associated with longer lead lengths. SMA connectors were used for best high-frequency performance. Because distances are extremely short, performance is unaffected by the fact that inputs and outputs do not match a Ω line. However, in applications that require lead lengths greater than one-quarter of the wavelength of the highest frequency of interest, use constant-impedance traces. Fully assembled evaluation boards are available for the MAX8ESA. Figure a. SOT High-Speed EV Board Component Placement Guide Component Side Figure b. SOT High-Speed EV Board LayoutComponent Side Figure c. High-Speed EV Board Layout Solder Side Figure a. SO-8 High-Speed EV Board Component Placement Guide Component Side Figure b. SO-8 High-Speed EV Board LayoutComponent Side Figure c. SO-8 High-Speed EV Board LayoutSolder Side
Single/Dual/Quad, 7MHz, ma, SOT, Table. Recommended Component Values COMPONENT/BW R F (Ω) R G (Ω).k.k A V = +V/V 8 8 -db BW (MHz) 9 COMPONENT/ BW MAX8/MAX8 A V = +V/V MAX8 Ω 8 8 9 A V = +V/V kω/ω MAX8/MAX8 A V = +V/V A V = +V/V kω/ω.k 7 7 MAX8 A V = +V/V MAX8 A V = +V/V Ω k MAX87 A V = +V/V Ω MAX8 MAX87 kω Ω Ω kω Ω Ω kω Ω Ω kω Ω Ω R F (Ω) k 8.k 7.k 7 8.k 9 8 R G (Ω) k 8.k 7 8 -db BW (MHz) 9 7 8 9 7 7 Choosing Feedback and Gain Resistors The optimum value of the external-feedback (R F ) and gain-setting (R G ) resistors used with the MAX8 MAX87 depends on the closed-loop gain and the application circuit s load. Table lists the optimum resistor values for some specific gain configurations. One-percent resistor values are preferred to maintain consistency over a wide range of production lots. Figures a and b show the standard inverting and noninverting configurations. Note: The noninverting circuit gain (Figure ) is plus the magnitude of the inverting closed-loop gain. Otherwise, the two circuits are identical. DC and Noise Errors Several major error sources must be considered in any op amp. These apply equally to the MAX8 MAX87. Offset-error terms are given by the equation below. Voltage and current-noise errors are root-square summed and are therefore computed separately. In Figure, the total output offset voltage is determined by the following factors: The input offset voltage (V OS ) times the closed-loop gain ( = R F / R G ). The positive input bias current (I B+ ) times the source resistor (R S ) (usually Ω or 7Ω), plus the negative input bias current (I B- ) times the parallel combination of R G and R F. In current-feedback amplifiers, the input bias currents at the IN+ and IN- terminals do not track each other and may have opposite polarity, so there is no benefit to matching the resistance at both inputs. The equation for the total DC error at the output is: V = ( I B+ ) R S + ( I B )( R F R G) + V OS The total output-referred noise voltage is: R e = F + n( ) R G [ ] + i R i R R e n+ S n F G n ( ) + ( ) RF R G + ( ) 7
Single/Dual/Quad, 7MHz, ma, SOT, MAX8 MAX87 The MAX8 MAX87 have a very low, nv/ Hz noise voltage. The current noise at the positive input (i n+ ) is pa/ Hz, and the current noise at the inverting input is pa/ Hz. An example of the DC error calculations, using the MAX8 typical data and typical operating circuit where R F = R G =.kω (R F R G = Ω) and R S = 7.Ω, gives the following: V = x x7. + x x +.x x + V =.mv Calculating the total output noise in a similar manner yields: ( ) Driving Capacitive Loads The MAX8 MAX87 are optimized for AC performance. They are not designed to drive highly capacitive loads. Reactive loads decrease phase margin and may produce excessive ringing and oscillation. Figure 7a shows a circuit that eliminates this problem. Placing the small (usually Ω to Ω) isolation resistor, R S, before the reactive load prevents ringing and oscillation. At higher capacitive loads, the interaction of the load capacitance and isolation resistor controls AC performance. Figures 7b and 7c show the MAX8 and MAX8 frequency response with a 7pF capacien() = + ( ) ( ) x x 7. + x x 9 + x Video Line Driver The MAX8 MAX87 are well suited to drive coaxial transmission lines when the cable is terminated at both ends, as shown in Figure. Cable-frequency response can cause variations in the signal s flatness. See Table for optimum R F and R G values. en() =.8nV/ Hz R G R F With a MHz system bandwidth, this calculates to µv RMS (approximately µvp-p, choosing the sixsigma value). R S I B - I B + V MAX8 MAX87 V IN RS R T R G R F Figure. Output Offset Voltage V V = -(R F / R G ) x V IN R O MAX8 MAX87 R G 8Ω R F 8Ω +V Figure a. Inverting Gain Configuration.µF V IN 7Ω 7Ω CABLE RS R T R G R F R O V VIDEO IN 7Ω CABLE 7Ω.µF MAX8.µF 7Ω VIDEO MAX8 MAX87 -V V = [+ (R F / R G ) V IN Figure b. Noninverting Gain Configuration Figure. Video Line Driver VIDEO LINE DRIVER 8
Single/Dual/Quad, 7MHz, ma, SOT, NORMALIZED GAIN (db) R G R F RS V IN Figure 7a. Using an Isolation Resistor (R S ) for High-Capacitive Loads - - MAX8 V IN = mvp-p A V = +V/V R F = R G =.kω 7pF R S = Ω C L R S = R L tive load. Note that in each case, gain peaking is substantially reduced when the Ω resistor is used to isolate the capacitive load from the amplifier output. AC Testing/Performance AC specifications on high-speed amplifiers are usually guaranteed without % production testing. Since these high-speed devices are sensitive to external parasitics introduced when automatic handling equipment is used, it is impractical to guarantee AC parameters through volume production testing. These parasitics are greatly reduced when using the recommended PC board layout (like the Maxim EV kit). Characterizing the part in this way more accurately represents the amplifier s true AC performance. Some manufacturers guarantee AC specifications without clearly stating how this guarantee is made. The AC specifications of the MAX8 MAX87 are derived through worst-case design simulations combined with a sample characterization of units. The AC performance distributions along with the worst-case simulation results for MAX8 and MAX8 are shown in Figures 8. These distributions are repeatable provided that the proper board layout and power-supply bypassing are used (see Layout and Power-Supply Bypassing section). MAX8 MAX87 - - Figure 7b. Frequency Response with Capacitive Load (With and Without Isolation Resistor) GAIN (db) - MAX8 V IN = mvp-p A V = +V/V R F =.kω 7pF RS = Ω R S = - - - Figure 7c. Frequency Response with Capacitive Load (With and Without Isolation Resistor) 9
Single/Dual/Quad, 7MHz, ma, SOT, VS = ±V V IN = mvp-p A V = +V/V UNITS MAX8 FIG.8a VS = ±V V IN = mvp-p A V = +V/V UNITS MAX8 FIG.8b 7 9 8 9 -db BANDWIDTH (MHz) 7 8 9 ±.db BANDWIDTH (MHz) Figure 8a. MAX8 -db Bandwidth Distribution (Dual Supplies) Figure 8b. MAX8 ±.db Bandwidth Distribution (Dual Supplies) 8 7 VS = ±V V = V STEP A V = +V/V UNITS MAX8 FIG.8c VS = ±V V = V STEP A V = +V/V UNITS MAX8 FIG.8d 7 8 9 RISING-EDGE SLEW RATE (V/µs) 7 8 9 7 8 9 FALLING-EDGE SLEW RATE (V/µs) Figure 8c. MAX8 Rising-Edge Slew-Rate Distribution (Dual Supplies) Figure 8d. MAX8 Falling-Edge Slew-Rate Distribution (Dual Supplies) 8 7 VS = +V V IN = mvp-p A V = +V/V UNITS MAX8 FIG.9a VS = +V V IN = mvp-p A V = +V/V UNITS MAX8 FIG.9b 7 9 8 9 -db BANDWIDTH (MHz) 7 8 9 ±.db BANDWIDTH (MHz) Figure 9a. MAX8 -db Bandwidth Distribution (Single Supply) Figure 9b. MAX8 ±.db Bandwidth Distribution (Single Supply)
Single/Dual/Quad, 7MHz, ma, SOT, 7 7 7 8 9 RISING-EDGE SLEW RATE (V/µs) VS = ±V V IN = mvp-p A V = +V/V UNITS VS = +V V = V STEP A V = +V/V UNITS Figure 9c. MAX8 Rising-Edge Slew-Rate Distribution (Single Supply) 7 8 9 7 8 -db BANDWIDTH (MHz) MAX8 FIG 9c MAX8 FIG a 8 8 7 8 9 7 8 9 FALLING-EDGE SLEW RATE (V/µs) VS = +V V = V STEP A V = +V/V UNITS Figure 9d. MAX8 Falling-Edge Slew-Rate Distribution (Single Supply) 7 8 9 ±.db BANDWIDTH (MHz) MAX8 FIG.9d VS = ±V V IN = mvp-p A V = +V/V UNITS MAX8 FIG a MAX8 MAX87 Figure a. MAX8 -db Bandwidth Distribution (Dual Supplies) Figure b. MAX8 ±.db Bandwidth Distribution (Dual Supplies) 8 7 VS = ±V V IN = V STEP A V = +V/V UNITS MAX8 FIG c VS = ±V V IN = V STEP A V = +V/V UNITS MAX8 FIG d 8 9 7 8 9 RISING-EDGE SLEW RATE (V/µs) 7 8 9 7 FALLING-EDGE SLEW RATE (V/µs) Figure c. MAX8 Rising-Edge Slew-Rate Distribution (Dual Supplies) Figure d. MAX8 Falling-Edge Slew-Rate Distribution (Dual Supplies)
Single/Dual/Quad, 7MHz, ma, SOT, MAX8 MAX87 VS = +V V IN = mvp-p A V = +V/V UNITS 7 8 9 7 8 -db BANDWIDTH (MHz) Figure a. MAX8 -db Bandwidth Distribution (Single Supply) MAX8 FIG a VS = +V V IN = mvp-p A V = +V/V UNITS 7 8 9 ±.db BANDWIDTH (MHz) Figure b. MAX8 ±.db Bandwidth Distribution (Single Supply) MAX8 FIG b 8 7 VS = +V V IN = V STEP A V = +V/V UNITS MAX8 FIG c 9 8 7 VS = +V V IN = V STEP A V = +V/V UNITS MAX8 FIG d 8 9 7 8 9 RISING-EDGE SLEW RATE (V/µs) 7 8 9 7 FALLING-EDGE SLEW RATE (V/µs) Figure c. MAX8 Rising-Edge Slew-Rate Distribution (Single Supply) Figure d. MAX8 Falling-Edge Slew-Rate Distribution (Single Supply)
Single/Dual/Quad, 7MHz, ma, SOT, TOP VIEW SINGLE MAX8 MAX8 SO DUAL 8 7 SHDN V CC N.C. Pin Configurations (continued) A INB- INA- INA+ V EE DUAL MAX8 MAX8 SO QUAD 8 7 V CC B N.C. IN- IN+ V EE INB+ MAX8 MAX87 A V CC A D B IND- INA- INA- INA+ V EE MAX8 MAX8 INB- INB+ INA+ V CC MAX8 MAX87 IND+ V EE N.C. N.C. INB+ INC+ SHDNA 9 SHDNB INC- INB- 9 N.C. 7 8 N.C. B 7 8 C SO SO DUAL QUAD A V CC A D MAX8 MAX8 9 8 7 INA- INA+ V CC MAX8 MAX87 B INB- INB+ INA- INA+ V EE IND- IND+ V EE SHDNA SHDNB INB+ INC+ µmax INB- B 7 INC- C N.C. 8 9 N.C. QSOP
Single/Dual/Quad, 7MHz, ma, SOT, MAX8 MAX87 Ordering Information (continued) PART MAX8EUT-T MAX8ESA MAX8ESA MAX8EUB MAX8ESD MAX8ESA MAX8EUB MAX8ESD MAX8ESD MAX8EEE MAX87ESD MAX87EEE TEMP RANGE - C to +8 C - C to +8 C - C to +8 C - C to +8 C - C to +8 C - C to +8 C - C to +8 C - C to +8 C - C to +8 C - C to +8 C - C to +8 C - C to +8 C *Contact factory for availability. PIN- PACKAGE SOT 8 SO 8 SO µmax* SO 8 SO µmax* SO SO QSOP SO QSOP TOP MARK AAAC Chip Information MAX8/MAX8 TRANSISTOR COUNT: 8 SUBSTRATE CONNECTED TO V EE MAX8 MAX8 TRANSISTOR COUNT: SUBSTRATE CONNECTED TO V EE MAX8/MAX87 TRANSISTOR COUNT: SUBSTRATE CONNECTED TO V EE Package Information LSOT.EPS Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, San Gabriel Drive, Sunnyvale, CA 98 8-77-7 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.