9-; Rev ; /8 Single-Supply, 5MHz, 6-Bit Accurate, General Description The MAX4434/MAX4435 single and MAX4436/MAX4437 dual operational amplifiers feature wide bandwidth, 6- bit settling time in 3ns, and low-noise/low-distortion operation. The are compensated for unity-gain stability and have a small-signal -3dB bandwidth of 5MHz. The are compensated for closed-loop gains of +5 or greater and have a small-signal, -3dB bandwidth of 5MHz. The op amps require only 5mA of supply current per amplifier while achieving 5dB open-loop gain. Voltage noise density is a low.nv/ Hz and provides 97dB spurious-free dynamic range (SFDR) at MHz. These characteristics make these op amps ideal for driving modern, high-speed 4- and 6-bit analog-to-digital converters (ADCs). These high-speed op amps feature wide-output voltage swings and a high-current output drive up to 65mA. Using a voltage feedback architecture, the MAX4434 MAX4437 meet the requirements of many applications that previously depended on current feedback amplifiers. The MAX4434/MAX4435 are available in space-saving 5-pin SOT3 packages and the MAX4436/MAX4437 are available in 8-pin µmax packages. Applications High-Speed 4- and 6-Bit ADC Preamplifiers Low-Noise Preamplifiers IF/RF Amplifiers Low-Distortion Active Filters High-Performance Receivers Precision Instrumentation µmax is a registered trademark of Maxim Integrated Products, Inc. Pin Configurations Features 6-Bit Accurate Settling in 3ns () 97dB SFDR at MHz, 4Vp-p Output.nV/ Hz Input Voltage Noise Density db (min) Open-Loop Gain 388V/µs Slew Rate () 65mA High Output Drive Available in Space-Saving Packages 5-Pin SOT3 (MAX4434/MAX4435) 8-Pin µmax (MAX4436/MAX4437) Ordering Information PART TEMP RANGE PIN-PACKAGE MAX4434EUK-T -4 C to +85 C 5 SOT3 MAX4434ESA -4 C to +85 C 8 SO MAX4434EUK/V+T -4 C to +85 C 5 SOT3 MAX4435EUK-T -4 C to +85 C 5 SOT3 MAX4435ESA -4 C to +85 C 8 SO MAX4436EUA -4 C to +85 C 8 µmax MAX4436ESA -4 C to +85 C 8 SO MAX4437EUA -4 C to +85 C 8 µmax MAX4437ESA -4 C to +85 C 8 SO +Denotes a lead(pb)-free/rohs-compliant package. Selector Guide appears at end of data sheet. Typical Operating Circuit V CC TOP VIEW OUT 5 V CC MAX4434 MAX4435 C HIGH-SPEED 4-/6-BIT ADC V EE 5 IN+ 3 4 IN- SOT3 IN 3 MAX4434 4 MAX4435 Pin Configurations continued at end of data sheet. Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at -888-69-464, or visit Maxim's website at www.maxim-ic.com.
Single-Supply, 5MHz, 6-Bit Accurate, ABSOLUTE MAXIMUM RATINGS Supply Voltage (V CC - V EE )...+6V Differential Input Voltage...+V Input Voltage Range...(V CC +.3V) to (V EE -.3V) Current into Any Input Pin...±5mA Output Short-Circuit Duration to V CC or V EE...(Note ) Continuous Power Dissipation (T A = +7 C) 5-Pin SOT3 (derate 7.mW/ C above +7 C)...57mW Note : The are not protected for output short-circuit conditions. 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 CHARACTERISTICS 8-Pin SO (derate 5.88mW/ C above +7 C)...47mW 8-Pin µmax (derate 4.5mW/ C above +7 C)... 33mW Operating Temperature Range...-4 C to +85 C Junction Temperature...+5 C Storage Temperature Range...-65 C to +5 C Lead Temperature (soldering, s)...+3 C (V CC = +5V, V EE =, R L = to V CC /, T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A = +5 C.) (Note ) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Common-Mode Voltage Range V CM Guaranteed by CMRR test V EE V CC - V Input Offset Voltage V OS 3.5 mv Input Offset Voltage Temperature Coefficient TCV OS 4 µv/ C Input Offset Voltage Matching MAX4436/MAX4437.5 mv Input Bias Current I B 4 µa Input Offset Current I OS 5 µa Differential Mode -mv V IN +mv Input Resistance R IN Common Mode V CM (V CC - V) kω.7 MΩ Common-Mode Rejection Ratio CMRR V EE V CM (V CC - V) 75 db (V EE +.5) V OUT (V CC -.5), R L = kω Open-Loop Gain A VOL (V EE +.5) V OUT (V CC -.5), R L = 5Ω Output Voltage Swing V OUT R L = kω 5 96 V CC - V OH 65 V OL - V EE 5 7 R Sinking 4 65 Output Current I L = Ω to OUT Ground Sourcing 35 6 Output Short-Circuit Current I SC Sinking or sourcing ±7 ma DC Power-Supply Rejection Ratio PSRR V CC = +4.5V to +5.5V 85 db Operating Supply Voltage V S Guaranteed by PSRR test +4.5 +5.5 V Quiescent Supply Current (Per Amplifier) I S 5 8 ma db mv ma Note : All devices are % production tested at +5 C. Specifications over temperature limits are guaranteed by design.
Single-Supply, 5MHz, 6-Bit Accurate, AC ELECTRICAL CHARACTERISTICS (V CC = +5V, V EE =, V CM = V CC /, R L = 5Ω, A VCL = +, and T A = +5 C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Small-Signal -3dB Bandwidth Large-Signal -3dB Bandwidth Small-Signal.dB Gain Flatness Large-Signal.dB Gain Flatness Slew Rate BW SS BW LS BW.dBSS BW.dBLS SR V OUT = mvp-p V OUT = mvp-p (A VCL = +5) V OUT = Vp-p V OUT = 4Vp-p (A VCL = +5) V OUT = mvp-p V OUT = mvp-p (A VCL = +5) V OUT = Vp-p V OUT = 4Vp-p (A VCL = +5) V OUT = V step V OUT = 4V step (A VCL = +5) 5 5 8 5 8 8 5 33 388 MHz MHz MHz MHz V/µs V OUT = V step R F V OUT = 4V step (A VCL = +5) Settling Time to 6-Bit (.5%) Output Glitch Settling to 6-Bit (.5%) Output Overload Recovery Time AC Common-Mode Rejection Ratio t S.5% V OUT =.5V to 3.5V step V OUT =.5V to 3.5V step (A VCL = +5) V OUT = V to 4V step 5pF load, C L charged from V to 4V 4 ns 5% overdrive, settling to % accuracy ns CMRR f C = khz -9 db 7 35 3 4 ns ns 3
Single-Supply, 5MHz, 6-Bit Accurate, AC ELECTRICAL CHARACTERISTICS (continued) (V CC = +5V, V EE =, V CM = V CC /, R L = 5Ω, A VCL = +, and T A = +5 C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS AC Power-Supply Rejection Ratio Spurious-Free Dynamic Range Input Noise Voltage Density Input Noise Current Density PSRR f C = khz - db SFDR V OUT = Vp-p f C = khz -97 centered at V CC / f C = MHz -98 V OUT = 3Vp-p f C = khz -3 centered at V CC / f C = MHz -99 V OUT = 4Vp-p f C = khz - centered at V CC / f C = MHz -97 en f C = khz. nv/ Hz in f C = khz. pa/ Hz Input Capacitance C IN.3 pf dbc Maximum Capacitive Load Without Sustained Oscillations 3 pf Output Impedance Z OUT f C = MHz.5 Ω Crosstalk f C = MHz, MAX4436/MAX4437-8 db Typical Operating Characteristics (V CC = +5V, V EE =, R L = 5Ω, C L =, T A = +5 C, unless otherwise noted.) 3 SMALL-SIGNAL GAIN vs. FREQUENCY (A VCL = +V/V) mvp-p MAX4434-37 toc 3 SMALL-SIGNAL GAIN vs. FREQUENCY (A VCL = +5V/V) mvp-p MAX4434-37 toc.3.. GAIN FLATNESS vs. FREQUENCY (A VCL = +V/V) mvp-p MAX4434-37 toc3 - - -3 - - -3 -. -. -.3-4 -4 -.4-5 -5 -.5-6 -6 -.6-7 k M M M G -7 k M M M G -.7 k M M M G 4
Single-Supply, 5MHz, 6-Bit Accurate, Typical Operating Characteristics (continued) (V CC = +5V, V EE =, R L = 5Ω, C L =, T A = +5 C, unless otherwise noted.).3.. -. -. -.3 -.4 -.5 -.6 GAIN FLATNESS vs. FREQUENCY (A VCL = +V/V) Vp-p -.7 k M M M 3 - - LARGE-SIGNAL GAIN vs. FREQUENCY (A VCL = +V/V) Vp-p MAX4434-37 toc7-3 -4-5 -6-7 k M M M MAX4434-37 toc4.3.. -. -. -.3 -.4 -.5 -.6 GAIN FLATNESS vs. FREQUENCY (A VCL = +5V/V) MAX4434-37 toc5 -.7 k M M M G 3 - - -3-4 -5-6 LARGE-SIGNAL GAIN vs. FREQUENCY (A VCL = +5V/V) -7 k M M M MAX4434-37 toc8.3.. -. -. -.3 -.4 -.5 -.6 5mV/div 5mV/div GAIN FLATNESS vs. FREQUENCY (A VCL = +5V/V) 4Vp-p -.7 k M M M SMALL-SIGNAL PULSE RESPONSE ns/div A VCL = +V/V MAX4434-37 toc6 MAX4434-47 toc9 SMALL-SIGNAL PULSE RESPONSE LARGE-SIGNAL PULSE RESPONSE LARGE-SIGNAL PULSE RESPONSE mv/div A VCL = +5V/V MAX4434-47 toc V/div A VCL = +V/V MAX4434-47 toc mv/div A VCL = +5V/V MAX4434-47 toc 5mV/div V/div V/div ns/div ns/div ns/div 5
Single-Supply, 5MHz, 6-Bit Accurate, Typical Operating Characteristics (continued) (V CC = +5V, V EE =, R L = 5Ω, C L =, T A = +5 C, unless otherwise noted.) 5mV/div 5mV/div SMALL-SIGNAL PULSE RESPONSE ns/div A VCL = +V/V C L = 5pF MAX4434-47 toc3 mv/div 5mV/div SMALL-SIGNAL PULSE RESPONSE ns/div A V = +5V/V C L = 5pF MAX4434-47 toc4 V/div V/div LARGE-SIGNAL PULSE RESPONSE ns/div A VCL = +V/V C L = 3pF MAX4434-47 toc5 mv/div V/div LARGE-SIGNAL PULSE RESPONSE A VCL = +5V/V C L = 3pF MAX4434-47 toc6 POWER-SUPPLY REJECTION RATIO (db) - -3-5 -7-9 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY MAX4434-37 toc7 COMMON-MODE REJECTION RATIO (db) - - -3-4 -5-6 -7-8 -9 COMMON-MODE REJECTION RATIO vs. FREQUENCY MAX4434-37 toc8 ns/div -. FREQUENCY (MHz) -. FREQUENCY (MHz) ISOLATION RESISTANCE (Ω) 8 6 4 ISOLATION RESISTANCE vs. CAPACITIVE LOAD 5 5 CAPACITIVE LOAD (pf) MAX4434-37 toc9 IMPEDANCE (Ω).. CLOSED-LOOP IMPEDANCE vs. FREQUENCY. FREQUENCY (MHz) MAX4434-37 toc 7 6 5 4 3 - - -3-4 -5-6 k GAIN AND PHASE vs. FREQUENCY MAX4434-37 toc 35 A VCL = V/V 7 5 GAIN 8 35 9 45 PHASE -45-9 -35-8 -5-7 k M M M G PHASE (degrees) 6
Single-Supply, 5MHz, 6-Bit Accurate, Typical Operating Characteristics (continued) (V CC = +5V, V EE =, R L = 5Ω, C L =, T A = +5 C, unless otherwise noted.) HARMONIC DISTORTION (db) -5-6 -7-8 -9 - V OUT = Vp-p HARMONIC DISTORTION vs. FREQUENCY ND HARMONIC 3RD HARMONIC -. FREQUENCY (MHz) MAX4434-37 toc HARMONIC DISTORTION (db) -4-5 -6-7 -8-9 - - - -3 f = 5kHz HARMONIC DISTORTION vs. SWING ND HARMONIC 3RD HARMONIC.5..5..5 3. 3.5 4. SWING (Vp-p) MAX4434-37 toc3 HARMONIC DISTORTION (db) HARMONIC DISTORTION vs. RESISTIVE LOAD V - OUT = Vp-p f = 5kHz - -3-4 -5-6 -7-8 -9 ND HARMONIC - 3RD HARMONIC - 5 5 5 RESISTIVE LOAD (Ω) MAX4434-37 toc4 VOLTAGE NOISE (nv/ Hz) VOLTAGE NOISE vs. FREQUENCY MAX4434-37 toc5 CURRENT NOISE DENSITY (pa/ Hz) CURRENT NOISE DENSITY vs. FREQUENCY MAX4434-37 toc6 - -4-6 -8 - MAX4436/MAX4437 CROSSTALK vs. FREQUENCY MAX4434-37 toc7 k k k M k k k M -. FREQUENCY (MHz) QUIESCENT CURRENT (ma) 6 5 4 3 QUIESCENT CURRENT PER AMPLIFIER vs. TEMPERATURE MAX4434-37 toc8 BIAS CURRENT (μa) 5 4 3 9 8 7 6 BIAS CURRENT vs. TEMPERATURE MAX4434-37 toc9 OFFSET VOLTAGE (mv)..8.6.4. -. -.4 -.6 -.8 OFFSET VOLTAGE vs. TEMPERATURE MAX4434-37 toc3-5 -5 5 5 75 5-5 -5 5 5 75 -. -5-5 5 5 75 TEMPERATURE ( C) TEMPERATURE ( C) TEMPERATURE ( C) 7
Single-Supply, 5MHz, 6-Bit Accurate, Typical Operating Characteristics (continued) (V CC = +5V, V EE =, R L = 5Ω, C L =, T A = +5 C, unless otherwise noted.) VOLTAGE SWING (mv) 5 9 6 3 VOLTAGE SWING vs. TEMPERATURE FROM POSITIVE FROM NEGATIVE -5-5 5 5 75 TEMPERATURE ( C) MAX4434-37 toc3 VOLTAGE SWING (mv) 8 6 4 R L = kω VOLTAGE SWING vs. TEMPERATURE FROM POSITIVE RAIL FROM NEGATIVE RAIL -5-5 5 5 75 TEMPERATURE ( C) MAX4434-37 toc3 Pin Description PIN MAX4434/MAX4435 NAME FUNCTION SOT3 SO 6 OUT Output 4 V EE Ground 3 3 IN+ Noninverting Input 4 IN- Inverting Input 5 7 V CC Positive Power Supply, 5, 8 N.C. No Connection. Not internally connected. PIN MAX4436/MAX4437 SO/µMAX NAME FUNCTION OUTA Amplifier A Output INA- Amplifier A Inverting Input 3 INA+ Amplifier A Noninverting Input 4 V EE Ground 5 INB+ Amplifier A Noninverting Input 6 INB- Amplifier A Inverting Input 7 OUTB Amplifier A Output 8 V CC Positive Power Supply 8
Single-Supply, 5MHz, 6-Bit Accurate, Detailed Description The are wide-bandwidth, ultra-lowdistortion, voltage-feedback amplifiers. The MAX4434/ MAX4436 are internally compensated for unity gain. The are internally compensated for gains of +5V/V or greater. These amplifiers have ultra-fast 35ns (MAX4434/ MAX4436) 6-bit settling times, -97dB SFDR at MHz, and 4Vp-p output swing with minimum 5dB openloop gain. High-Speed ADC Input Driver Application The op amps are ideal for driving high-speed 4- to 6-bit ADCs. In most cases, these ADCs operate with a charge balance scheme, with capacitive loads internally switched on and off from the input. The driver used must withstand these changing capacitive loads while holding the signal amplitude stability consistent with the ADC s resolution and, at the same time, have a frequency response compatible with the sampling speed of the ADC (Figure ). Inverting and Noninverting Configurations The circuits typically used for the inverting and noninverting configurations of the are shown in Figures a and b. The minimum unconditionally stable gain values are for the and 5 for the. Use care in selecting the value for the resistor marked R S in both circuits. From dynamic stability considerations (based on the part s frequency response and the input capacitance of the ), the maximum recommended value for R S is 5Ω. In general, lower R S values will yield a higher bandwidth and better dynamic stability, at the cost of higher power consumption, higher power dissipation in the IC, and reduced output drive availability. For a minimum R S value, take into consideration that the current indicated as I F is supplied by the output stage and must be discounted from the maximum output current to calculate the maximum current available to the load. I F can be found using the following equation: I F = V IN(MAX) / R S If DC thermal stability is an important design concern, the Thevenin resistance seen by both inputs at DC must be balanced. This includes the resistance of the signal source and termination resistors if the amplifier signal input is fed from a transmission line. The capacitance associated with the feedback resistors must also be considered as a possible limitation to the available bandwidth or to the dynamic stability. Only resistors with small parallel capacitance specifications should be considered. Applications Information V CC V EE Figure. Typical Application Circuit HIGH-SPEED 4/6-BIT ADC Layout and Power-Supply Bypassing The have wide bandwidth and consequently require careful board layout. 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 a large lowimpedance ground plane that is as free of voids as possible. Do not use commercial breadboards. Keep signal lines as short and straight as possible. Observe high-frequency bypassing techniques to maintain the amplifier s accuracy and stability. In general, use sur- R F V IN R S V OUT V IN I F R S R F I F A = + RF R S = V OUT V IN R B V OUT A = - R F R S = V OUT V IN Figure a. Noninverting Configuration Figure b. Inverting Configuration 9
Single-Supply, 5MHz, 6-Bit Accurate, V IN MAX4434- MAX4437 V OUT face-mount components since they have shorter bodies and lower parasitic reactance. This will result in improved performance over through-hole components. The bypass capacitors should include nf and/or.µf surface-mount ceramic capacitors between V CC and the ground plane, located as close to the package as possible. Place a µf tantalum capacitor at the power supply s point of entry to the PC board to ensure the integrity of the incoming supplies. Input termination resistors and output back-termination resistors, if used, should be surface-mount types and should be placed as close to the IC pins as possible. Driving Capacitive Loads The can drive capacitive loads. However, excessive capacitive loads may cause ringing or instability at the output as phase margin is reduced. Adding a small isolation resistor in series with the output capacitive load helps reduce the ringing but slightly increases gain error (see Typical Operating Characteristics and Figure 3). R ISO Figure 3. Capacitive-Load Driving Circuit C L R L PART AMPS MIN GAIN STABLE (V/V) Selector Guide BW (MHz) SETTLING TIME TO.5% (ns) MAX4434 + 5 35 MAX4435 +5 5 3 MAX4436 + 5 35 MAX4437 +5 5 3 TOP VIEW Pin Configurations (continued) N.C. INA- IN- IN+ V EE OUTA INB- INA+ V EE 3 4 3 4 SO μmax/so 8 7 6 5 8 7 6 5 MAX4434 MAX4435 N.C. V CC OUT N.C. V CC OUTB INB+ MAX4436 MAX4437 Chip Information MAX4434/MAX4435 TRANSISTOR COUNT: 4 MAX4436/MAX4437 TRANSISTOR COUNT: 38
Single-Supply, 5MHz, 6-Bit Accurate, Package Information (For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.) PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 5 SOT3 U5- -57 8 SO S8- -36 8 µmax U8- -4 SOT-3 5L.EPS
Single-Supply, 5MHz, 6-Bit Accurate, Package Information (continued) (For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.) α 8LUMAXD.EPS α
Single-Supply, 5MHz, 6-Bit Accurate, Package Information (continued) (For the latest package outline information and land patterns, go to www.maxim-ic.com/packages.) N TOP VIEW E H INCHES MILLIMETERS DIM MIN MAX MIN MAX A.53.69.35.75 A.4...5 B.4.9.35.49 C.7..9.5 e.5 BSC.7 BSC E.5.57 3.8 4. H.8.44 5.8 6. L.6.5.4.7 VARIATIONS: DIM D D D INCHES MILLIMETERS MIN MAX MIN MAX N MS.89.97 4.8 5. 8 AA.337.344 8.55 8.75 4 AB.386.394 9.8. 6 AC SOICN.EPS D A C e B A FRONT VIEW L SIDE VIEW -8 PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE,.5" SOIC APPROVAL DOCUMENT CONTROL NO. REV. -4 B 3
Single-Supply, 5MHz, 6-Bit Accurate, REVISION NUMBER REVISION DATE DESCRIPTION Revision History PAGES CHANGED / Initial release /8 Added automotive part number 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. 4 Maxim Integrated Products, San Gabriel Drive, Sunnyvale, CA 9486 48-737-76 8 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.