Ultra-Small, Low-Cost, 85MHz Op Amps with Rail-to-Rail Outputs and Disable

Transcription

1 9-3; Rev 4; /9 Ultra-Small, Low-Cost, 85MHz Op Amps with General Description The MAX4389/MAX439/MAX439 MAX4396 family of op amps are unity-gain stable devices that combine high-speed performance, rail-to-rail outputs, and disable mode. These devices are targeted for applications where an input or an output is exposed to the outside world, such as video and communications. The MAX4389/MAX439/MAX439 MAX4396 operate from a single 4.5V to V supply or from dual ±.5V to ±5.5V supplies. The common-mode input voltage range extends to the negative power-supply rail (ground in single-supply applications). The MAX4389/MAX439/ MAX439 MAX4396 consume only 5.5mA of quinescent supply current per amplifier while achieving a 85MHz -3dB bandwidth, 7MHz.dB gain flatness, and a 5V/µs slew rate. Disable mode sets the outputs to high impedance while consuming only 45µA of current. The MAX4389 single, MAX4393 dual, MAX4394 triple, and MAX4396 quad include disable capabilities. The MAX4389 and MAX439 are available in ultra-small, 6-pin SC7 packages. IN Set-Top Boxes Surveillance Video Systems Analog-to-Digital Converter Interface CCD Imaging Systems Digital Cameras Video-on-Demand Video Line Driver Applications Typical Operating Circuit DISABLE MAX Ω Z o = 75Ω OUT 75Ω Features Low Cost High Speed 85MHz -3dB Bandwidth 7MHz.dB Gain Flatness 5V/µs Slew Rate Single 4.5V to V or Dual ±.5V to ±5.5V Operation Rail-to-Rail Outputs Input Common-Mode Range Extends to V EE Low Differential Gain/Phase:.5%/.5 Low Distortion at 5MHz -59dBc Spurious-Free Dynamic Range High Output Drive: ±5mA 45µA Disable Capability (MAX4389/MAX4393/MAX4394/MAX4396) Space-Saving SC7, SOT3, µmax, or TSSOP Packages TOP VIEW OUT V EE + 6 V CC Ordering Information PART TEMP RANGE PIN- PACKAGE Pin Configurations MAX DISABLE TOP MARK MAX4389EXT+T -4 C to +85 C 6 SC7 ABF MAX4389EUT+T -4 C to +85 C 6 SOT3 ABDC MAX4389EUT/V+T -4 C to +85 C 6 SOT3 ABDC MAX439EXT+T -4 C to +85 C 6 SC7 ABE MAX439EUK+T -4 C to +85 C 5 SOT3 ADZM Ordering Information continued at end of data sheet. Selector Guide appears at end of data sheet. +Denotes a lead(pb)-free/rohs-compliant package. /V denotes an automotive qualified part. T = Tape and reel. MAX4389/MAX439/MAX439 MAX4396 IN+ 3 4 IN- Ω Ω SC7/SOT3 VIDEO LINE DRIVER Pin Configurations continued at end of data sheet. Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at , or visit Maxim s website at

2 MAX4389/MAX439/MAX439 MAX4396 ABSOLUTE MAXIMUM RATINGS Supply Voltage (V CC to V EE )...-.3V to +V IN_+, IN_-, OUT_, DISABLE...(V EE -.3V) to (V CC +.3V) Differential Input Voltage...±.5V Current into Input Pins...±mA Output Short-Circuit Duration to V CC or V EE (Note )...Continuous Continuous Power Dissipation (T A = +7 C) 5-Pin SOT3 (derate 7.mW/ C above +7 C)...57mW 6-Pin SOT3 (derate 8.7mW/ C above +7 C)...696mW 6-Pin SC7 (derate 3.mW/ C above +7 C)...45mW Note : Continuous power dissipation must also be observed. 8-Pin SO (derate 5.88mW/ C above +7 C)...47mW 8-Pin µmax (derate 4.5mW/ C above +7 C)...36mW -Pin µmax (derate 5.6mW/ C above +7 C)...444mW 4-Pin SO (derate 8.33mW/ C above +7 C)...667mW 4-Pin TSSOP (derate mw/ C above +7 C)...77mW -Pin TSSOP (derate.9mw/ C above +7 C)...879mW Operating Temperature Range...-4 C to +85 C Junction Temperature...+5 C Storage Temperature Range C to +5 C Lead Temperature (soldering, s)...+3 C 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 Single Supply (V CC = 5V, V EE = V, V CM = V CC /, V OUT = V CC /, R L = to V CC /, DISABLE_ = V CC (MAX4389/MAX4393/MAX4394/MAX4396), 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 T A = +5 C 5 8 Input Offset Voltage V OS TA = -4 C to +85 C 6 Input Offset Voltage Matching MAX439 MAX4396 mv Input Offset Voltage Tempco TC VOS 5 µv/ C Input Bias Current I B.5 5 µa Input Offset Current IOS. 5 µa Differential mode (-V V IN +V) 7 kω Input Resistance R IN Common mode (-.V V CM +.75V) 3 MΩ Common-Mode Rejection Ratio CMRR (V EE -.V) V CM (V CC -.5V) 7 95 db V EE -..5V V OUT 4.75V, R L = kω 5 7 Open-Loop Gain A VOL.8V V OUT 4.5V, R L = 5Ω 5 6 V V OUT 4V, R L = 5Ω 58 V CC -.5 V mv db Output Voltage Swing V OUT R L = kω R L = 5Ω R L = 75Ω V CC - V OH.65.5 V OL - V EE.5.5 V CC - V OH.3.5 V OL - V EE.5.5 V CC - V OH.5.8 V OL - V EE.45.8 R L = 75Ω to V CC - V OH.7 ground V OL - V EE.5. Sinking from R L = 75Ω to V CC 4 55 Output Current I OUT Sourcing into R L = 75Ω to V EE 4 5 V ma Output Short-Circuit Current I SC Sinking or sourcing ± ma Open-Loop Output Resistance R OUT 8 Ω

3 DC ELECTRICAL CHARACTERISTICS Single Supply (continued) (V CC = 5V, V EE = V, V CM = V CC /, V OUT = V CC /, R L = to V CC /, DISABLE_ = V CC (MAX4389/MAX4393/MAX4394/MAX4396), 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 Power-Supply Rejection Ratio PSRR V EE = V, V CC = 4.5V to 5.5V db Operating Supply Voltage Range DC ELECTRICAL CHARACTERISTICS Dual Supply V S Guaranteed by PSRR 4.5 V Disabled Output Resistance R OUT(OFF) DISABLE_ =, V OUT 5V 4 95 kω DISABLE_ Logic-Low Threshold V IL V CC - 3 V DISABLE_ Logic-High Threshold V IH V CC -.5 DISABLE_ Logic Input Low Current DISABLE_ Logic Input High Current Quiescent Supply Current (Per Amplifier) I IL DISABLE_ = 6 µa I IH DISABLE_ = V CC 5 4 µa DISABLE_ = V CC 3. 5 I S DISABLE_ =.3.4 (V CC = 5V, V EE = -5V, V CM = V, V OUT = V, R L = to, DISABLE_ = V CC (MAX4389/MAX4393/MAX4394/MAX4396), 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 V CM Guaranteed by CMRR test V EE V CC -.5 V T A = +5 C 7 Input Offset Voltage V OS T A = -4 C to +85 C 8 Input Offset Voltage Matching MAX439 MAX4396 mv Input Offset Voltage Tempco TC VOS µv/ C Input Bias Current I B 5 5 µa Input Offset Current I OS.5 5 µa Differential mode (-V V IN +V) 7 kω Input Resistance R IN Common mode (-.V V CM +.75V) 3 MΩ V ma mv MAX4389/MAX439/MAX439 MAX4396 Common-Mode Rejection Ratio CMRR V EE V CM (V CC -.5V) 7 9 db -4.5V V OUT 4.5V, R L = kω 65 8 Open-Loop Gain A VOL -4.5V V OUT 4.5V, R L = 5Ω 5 6 db 3

4 MAX4389/MAX439/MAX439 MAX4396 DC ELECTRICAL CHARACTERISTICS Dual Supply (continued) (V CC = 5V, V EE = -5V, V CM = V, V OUT = V, R L = to, DISABLE_ = V CC (MAX4389/MAX4393/MAX4394/MAX4396), 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 Output Voltage Swing AC ELECTRICAL CHARACTERISTICS Single Supply (V CC = 5V, V EE = V, V CM =.5V, R L = Ω to V CC /, DISABLE_ = V CC (MAX4389/MAX4393/MAX4394/MAX4396), V OUT = V CC /, A VCL = V/V, T A = +5 C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Small-Signal -3dB Bandwidth BW SS V OUT = mv P-P 7 MHz Large-Signal -3dB Bandwidth BW LS V OUT = V P-P 8 MHz Small-Signal.dB Gain Flatness Large-Signal.dB Gain Flatness V OUT R L = kω R L = 5Ω R L = 75Ω V CC - V OH.75.3 V OL - V EE.75. V CC - V OH V OL - V EE.4.5 V CC - V OH.5.35 V OL - V EE.75.6 Sinking from R L = 75Ω to V CC 5 95 Output Current I OUT Sourcing into R L = 75Ω to V EE 5 75 Output Short-Circuit Current I SC Sinking or sourcing ± ma Open-Loop Output Resistance R OUT 8 Ω Power-Supply Rejection Ratio PSRR V EE = V, V CC = 4.5V to 5.5V 48 6 db Operating Supply Voltage Range V S Guaranteed by PSRR 4.5 V Disabled Output Resistance R OUT(OFF) DISABLE_ = V, -5V V OUT +5V 4 95 kω DISABLE_ Logic-Low Threshold V IL V CC - 3 V DISABLE_ Logic-High Threshold V IH V CC -.5 V Quiescent Supply Current (Per Amplifier) DISABLE_ = V CC 6 I S DISABLE_ = V.45.8 BW.dBSS V OUT = mv P-P 3 MHz BW.dBLS V OUT = V P-P 3 MHz Slew Rate SR V OUT = V step 5 V/µs Settling Time to.% t s V OUT = V step 8 ns Rise/Fall Time t R /t F V OUT = mv P-P 4 ns Spurious-Free Dynamic Range SFDR f C = 5MHz, V OUT = V P-P -59 dbc V ma ma 4

5 AC ELECTRICAL CHARACTERISTICS Single Supply (continued) (V CC = 5V, V EE = V, V CM =.5V, R L = Ω to V CC /, DISABLE_ = V CC (MAX4389/MAX4393/MAX4394/MAX4396), V OUT = V CC /, A VCL = V/V, T A = +5 C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Differential Phase Error DP NTSC, R L = 5Ω.5 degrees Differential Gain Error DG NTSC, R L = 5Ω.5 % Input Noise-Voltage Density e n f = khz 3 nv/ Hz Input Noise-Current Density i n f = khz. pa/ Hz Input Capacitance C IN pf Output Impedance Z OUT f = 5MHz.6 Ω Disable OFF Time MAX4389/MAX4393/MAX4394/MAX ns Disable ON Time MAX4389/MAX4393/MAX4394/MAX ns Channel-to-Channel Isolation CH ISO MAX439 MAX4396, specified at DC -97 db AC ELECTRICAL CHARACTERISTICS Dual Supply (V CC = 5V, V EE = -5V, R L = to GND, GND =, V OUT = V, Gain = V/V, DISABLE = V CC, and T A = T MIN to T MAX, unless otherwise noted. Typical values are at T A = +5 C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Small-Signal -3dB Bandwidth BW SS V OUT = mv P-P 85 MHz Large-Signal -3dB Bandwidth BW LS V OUT = V P-P 9 MHz Small-Signal Bandwidth for.db Gain Flatness Large-Signal Bandwidth for.db Gain Flatness BW.dBss V OUT = mv P-P 7 MHz BW. d B LS V OUT = V P-P 4 MHz Slew Rate SR V OUT = V step 5 V/µs Settling Time to.% t S V OUT = V step ns Rise/Fall Time t R /t F V OUT = mv P-P 4 ns Spurious-Free Dynamic Range SFDR f C = 5MHz, V OUT = V P-P -59 dbc Differential Phase Error DP NTSC, R L = 5Ω.5 d eg r ees Differential Gain Error DG NTSC, R L = 5Ω.5 % Input Noise-Voltage Density e n f = khz 3 nv/ Hz Input Noise-Current Density i n f = khz. pa/ Hz Input Capacitance C IN pf Output Impedance Z OUT f = 5MHz.6 Ω Disable OFF Time MAX4389/MAX4393/MAX4394/MAX ns Disable ON Time MAX4389/MAX4393/MAX4394/MAX ns Channel-to-Channel Isolation CH ISO MAX439/MAX4393/MAX4394/MAX4395/ MAX4396, specified at DC -97 db MAX4389/MAX439/MAX439 MAX4396 Note : All devices are % production tested at T A = +5 C. Specifications over temperature limits are guaranteed by design. 5

6 MAX4389/MAX439/MAX439 MAX4396 GAIN (db) GAIN (db) DISTORTION (dbc) Typical Operating Characteristics (V CC = 5V, V EE = -5V, V CM = V, A VCL = V/V, R L = Ω to GND, GND =, T A = +5 C, unless otherwise noted.) k k k GAIN PHASE k GAIN AND PHASE vs. FREQUENCY k M M MAX4389 toc M SMALL-SIGNAL GAIN FLATNESS vs. FREQUENCY V OUT = mv P-P M M M DISTORTION vs. FREQUENCY V OUT = V P-P, A VCL = V/V ND HARMONIC 3RD HARMONIC M M G MAX4389 toc4 G MAX4389 toc7 M PHASE (DEGREES) GAIN (db) GAIN (db) DISTORTION (dbc) k k k V OUT = mv P-P SMALL-SIGNAL GAIN vs. FREQUENCY M M M LARGE-SIGNAL GAIN FLATNESS vs. FREQUENCY V OUT = V P-P M M M DISTORTION vs. FREQUENCY V OUT = V P-P, A VCL = V/V 3RD HARMONIC M ND HARMONIC M MAX4389 toc G MAX4389 toc5 G MAX4389 toc8 M OUTPUT IMPEDANCE (Ω) DISTORTION (dbc) GAIN (db) k.. k k V OUT = V P-P LARGE-SIGNAL GAIN vs. FREQUENCY M M M OUTPUT IMPEDANCE vs. FREQUENCY M M M DISTORTION vs. FREQUENCY V OUT = V P-P, A VCL = 5V/V M 3RD HARMONIC M ND HARMONIC MAX4389 toc3 G MAX4389 toc6 G MAX4389 toc9 M 6

7 Typical Operating Characteristics (continued) (V CC = 5V, V EE = -5V, V CM = V, A VCL = V/V, R L = Ω to GND, GND =, T A = +5 C, unless otherwise noted.) DISTORTION (dbc) GAIN (db) DISTORTION vs. RESISTIVE LOAD f o = 5MHz, V OUT = V P-P, A VCL = V/V ND HARMONIC 3RD HARMONIC k VOLTAGE SWING (V P-P ) COMMON-MODE REJECTION vs. FREQUENCY M M M SMALL-SIGNAL PULSE RESPONSE MAX4389 toc MAX4389 toc3 G DISTORTION (dbc) PSR (db) DISTORTION vs. VOLTAGE SWING f o = 5MHz, A VCL = V/V 3RD HARMONIC ND HARMONIC k VOLTAGE SWING (V P-P ) POWER-SUPPLY REJECTION vs. FREQUENCY M M M SMALL-SIGNAL PULSE RESPONSE MAX4389 toc MAX4389 toc4 G DIFF GAIN (%) DIFF PHASE ( ) OUTPUT VOLTAGE SWING (V) DIFFERENTIAL GAIN AND PHASE R L = 5Ω TO GND, A VCL = V/V.. R L = 5Ω TO GND, A VCL = V/V IRE OUTPUT VOLTAGE SWING vs. RESISTIVE LOAD V CC - V OH. V OL - V EE R LOAD (Ω) SMALL-SIGNAL PULSE RESPONSE MAX4389 toc MAX4389 toc5 MAX4389/MAX439/MAX439 MAX4396 INPUT 5mV/div A VCL = V/V MAX4389 toc6 INPUT 5mV/div A VCL VCL = +V/V R F = Ω MAX4389 toc7 INPUT mv/div A VCL = 5V/V R F = 5Ω MAX4389 toc8 OUTPUT 5mV/div OUTPUT 5mV/div OUTPUT 5mV/div ns/div ns/div ns/div 7

8 MAX4389/MAX439/MAX439 MAX4396 Typical Operating Characteristics (continued) (V CC = 5V, V EE = -5V, V CM = V, A VCL = V/V, R L = Ω to GND, GND =, T A = +5 C, unless otherwise noted.) INPUT 5mV/div OUTPUT 5mV/div VOLTAGE NOISE (nv/ Hz) LARGE-SIGNAL PULSE RESPONSE ns/div A VCL = V/V VOLTAGE NOISE vs. FREQUENCY k k k R L = Ω MAX4389 toc9 MAX4389 toc INPUT 5mV/div OUTPUT 5mV/div CURRENT NOISE (pa/ Hz) LARGE-SIGNAL PULSE RESPONSE ns/div A VCL = V/V R F = Ω CURRENT NOISE vs. FREQUENCY k k k R L = Ω MAX4389 toc MAX4389 toc3 INPUT mv/div OUTPUT 5mV/div GAIN (db) k LARGE-SIGNAL PULSE RESPONSE ns/div ISOLATION RESISTANCE vs. CAPACITIVE LOAD 68pF 33pF A VCL = 5V/V R F = 5Ω pf M M M MAX4389 toc MAX4389 toc4 G 8

9 Typical Operating Characteristics (continued) (V CC = 5V, V EE = -5V, V CM = V, A VCL = V/V, R L = Ω to GND, GND =, T A = +5 C, unless otherwise noted.) BANDWIDTH (MHz) SMALL-SIGNAL BANDWIDTH vs. LOAD RESISTANCE R LOAD (Ω) 5V DISABLE V.5V V OUT V DISABLE RESPONSE ns/div MAX4389 toc5 MAX4389 toc8 OPEN-LOOP GAIN (dbc) INPUT OFFSET VOLTAGE (mv) SUPPLY CURRENT (ma) OPEN-LOOP GAIN vs. RESISTIVE LOAD k k R LOAD (Ω) INPUT OFFSET VOLTAGE vs. TEMPERATURE TEMPERATURE ( C) SUPPLY CURRENT vs. TEMPERATURE MAX4389 toc6 MAX4389 toc9 MAX4389 toc3 CROSSTALK (db) INPUT BIAS CURRENT (μa) k CROSSTALK vs. FREQUENCY M M M INPUT BIAS CURRENT vs. TEMPERATURE TEMPERATURE ( C) MAX4389 toc7 G MAX4389 toc3 MAX4389/MAX439/MAX439 MAX TEMPERATURE ( C) 9

10 MAX4389/MAX439/MAX439 MAX4396 PIN MAX4389 MAX439 M A X4 3 9 M A X MAX4394 MAX4395 MAX4396 SC 7 / SO T 3 SC 7 SO T 3 µ M A X/ SO µ M A X SO / T SSO P SO / T SSO P T SSO P NAME OUT V EE FUNCTION Amplifier Output Negative Power Supply. Connect a.µf Capacitor to GND IN+ Noninverting Input IN- Inverting Input 5 DISABLE V CC 5, N.C INA+ 6 3 INA- 7 OUTA Pin Description D i sab l e. C onnect to V CC to E nab l e. P osi ti ve P ow er S upp l y. C onnect a.µf Cap aci tor to GN D. N o C onnecti on. N ot Inter nal l y C onnected. Amplifier A Noninverting Input Amplifier A Inverting Input Amplifier A Output 5 DISABLEA INB INB OUTB S hutd ow n Am p l i fi er A. C onnect to V CC to E nab l e. Amplifier B Noninverting Input Amplifier B Inverting Input Amplifier B Output

11 PIN MAX4389 MAX439 M A X4 3 9 M A X MAX4394 MAX4395 MAX4396 SC 7 / SO T 3 SC 7 SO T 3 µ M A X/ SO µ M A X SO / T SSO P SO / T SSO P T SSO P Detailed Description The MAX4389/MAX439/MAX439 MAX4396 are dualsupply, rail-to-rail, voltage-feedback amplifiers that employ current-feedback techniques to achieve 5V/µs slew rates and 85MHz bandwidths. Excellent harmonic distortion and differential gain/phase performance make these amplifiers an ideal choice for a wide variety of video and RF signal-processing applications. Applications Information The output voltage swings to within mv of each supply rail. Local feedback around the output stage ensures low open-loop output impedance to reduce Pin Description (continued) NAME DISABLEB 5 INC INC OUTC D ISABLE C 7 IND+ 3 8 IND- 4 9 OUTD D ISABLE D FUNCTION S hutd ow n Am p l i fi er B. C onnect to V CC to E nab l e. Amplifier C Noninverting Input Amplifier C Inverting Input Amplifier C Output Shutdown Amplifier C. Connect to V CC to Enable. Amplifier D Noninverting Input Amplifier D Inverting Input Amplifier D Output Shutdown Amplifier D. Connect to V CC to Enable. gain sensitivity to load variations. The input stage permits common-mode voltages to the negative supply and to within.5v of the positive supply rail. Choosing Resistor Values Unity-Gain Configuration The MAX4389/MAX439/MAX439 MAX4396 are internally compensated for unity gain. When configured for unity gain, a 4Ω resistor (R F ) in series with the feedback path optimizes AC performance. This resistor improves AC response by reducing the Q of the parallel LC circuit formed by the parasitic feedback capacitance and inductance. MAX4389/MAX439/MAX439 MAX4396

12 MAX4389/MAX439/MAX439 MAX4396 Video Line Driver The MAX4389/MAX439/MAX439 MAX4396 are lowpower, voltage-feedback amplifiers featuring large-signal (VP-P) bandwidths of 9MHz and.db largesignal gain flatness of 4MHz. They are designed to minimize differential-gain error and differential-phase error to.5% and.5, respectively. They have a ns settling time to.%, 5V/µs slew rates, and output-current-drive capability of up to 5mA making them ideal for driving video loads. Inverting and Noninverting Configurations Select the gain-setting feedback (R F ) and input (R G ) resistor values to fit your application. Large resistor values increase voltage noise and interact with the amplifier s input and PC board capacitance. This can generate undesirable poles and zeros and decrease bandwidth or cause oscillations. For example, a noninverting gain-of-two configuration (R F = R G ) using kω resistors, combined with pf of amplifier input capacitance and pf of PC board capacitance, causes a pole at 79.6MHz. Since this pole is within the amplifier bandwidth, it jeopardizes stability. Reducing the kω resistors to Ω extends the pole frequency to.59ghz, but could limit output swing by adding Ω in parallel with the amplifier s load resistor (Figures a and b). V IN R G V IN R G R F MAX43 Figure b. Inverting Gain Configuration R F MAX43 V OUT V OUT = [ + (R F / R G )] V IN Figure a. Noninverting Gain Configuration V OUT V OUT = -(R F / R G ) V IN Layout and Power-Supply Bypassing The MAX4389/MAX439/MAX439 MAX4396 operate from single 4.5V to V or from dual ±.5V to ±5.5V supplies. Bypass each supply with a.µf capacitor as close to the pin as possible. Maxim recommends using microstrip and stripline techniques to obtain full bandwidth. To ensure that the PC board does not degrade the amplifier s performance, design it for a frequency greater than GHz. Pay careful attention to inputs and outputs to avoid large parasitic capacitance. Whether or not you use a constant-impedance board, observe the following design guidelines: Do not use wire-wrap boards; they are too inductive. Do not use IC sockets; they increase parasitic capacitance and inductance. Use surface-mount instead of through-hole components for better, high-frequency performance. Use a PC board with at least two layers; it should be as free from voids as possible. Keep signal lines as short and as straight as possible. Do not make 9 turns; round all corners. Low-Power Disable Mode The MAX4389/MAX4393/MAX4394/MAX4396 feature a disable function that allows the amplifiers to be placed in a low-power, high-output-impedance state. When the disable pin (DISABLE) is active, the amplifier s output impedance is 95kΩ. This high resistance and the low pf output capacitance make the MAX4389/ MAX439/MAX439 MAX4396 in RF/video multiplexer or switch applications. For larger arrays, pay careful attention to capacitive loading (see the Output Capacitive Loading and Stability section). Output Capacitive Loading and Stability The MAX4389/MAX439/MAX439 MAX4396 are optimized for AC performance. They are not designed to drive highly reactive loads, which decrease phase margin and may produce excessive ringing and oscillation. Figure shows a circuit that eliminates this problem. Figure 3 is a graph of the Optimal Isolation Resistor (R S ) vs. Capacitive Load. Figure 4 shows how a capacitive load causes excessive peaking of the amplifier s frequency response if the capacitor is not isolated from the amplifier by a resistor. A small isolation resistor (usually Ω to 5Ω) placed before the reactive load prevents ringing and oscillation. At higher capacitive loads, AC performance is controlled by the interaction of the load capacitance and the isolation resistor. Figure 5 shows the effect of a 5Ω isolation resistor on closed-loop response.

13 R G V IN R F MAX438 _ R ISO C L V OUT Figure. Driving a Capacitive Load Through an Isolation Resistor GAIN (db) RISO (Ω) LARGE SIGNAL (V OUT = V P-P ) SMALL SIGNAL (V OUT = mv P-P ) C LOAD (pf) Figure 3. Isolation Resistance vs. Capacitive Load pf 68pF 33pF -5-6 k M M M G GAIN (db) pF 8pF -5-6 k M M M Chip Information MAX4389 TRANSISTOR COUNT: 7 MAX439 TRANSISTOR COUNT: 7 MAX439 TRANSISTOR COUNT: 4 MAX4393 TRANSISTOR COUNT: 4 MAX4394 TRANSISTOR COUNT: 98 MAX4395 TRANSISTOR COUNT: 396 MAX4396 TRANSISTOR COUNT: 396 PROCESS: BiCMOS pf Figure 5. Small-Signal Gain vs. Frequency with Load Capacitance and 7Ω Isolation Resistor G MAX4389/MAX439/MAX439 MAX4396 Figure 4. Small-Signal Gain vs. Frequency with Load Capacitance and No Isolation Resistor 3

14 MAX4389/MAX439/MAX439 MAX4396 TOP VIEW TOP VIEW OUT V EE IN V CC MAX439 5 N.C. 3 4 IN- SC7 OUTA INA- INA+ V EE TOP VIEW DISABLEA DISABLEC DISABLEB V CC INA+ INA- OUTA 8 V CC 7 OUTB MAX439 6 INB- 5 INB+ μmax/so MAX OUTC INC- INC+ V EE INB+ INB- OUTB Pin Configurations (continued) TOP VIEW OUT 5 V CC V EE MAX439 IN+ 3 4 IN- SOT3 TOP VIEW OUTA V CC INA- INA+ V EE 3 4 MAX OUTB INB- INB+ DISABLEA 5 6 DISABLEB μmax TOP VIEW OUTA 4 OUTD INA- 3 IND- INA+ 3 IND+ V CC 4 MAX4395 V EE INB+ 5 INC+ INB- 6 9 INC- OUTB 7 8 OUTC SO/TSSOP SO/TSSOP 4

15 Pin Configurations (continued) TOP VIEW + DISABLEA OUTA INA- INA DISABLED OUTD IND- IND+ V CC 5 MAX V EE INB+ INB- OUTB INC+ INC- OUTC DISABLEB N.C. 9 DISABLEC N.C. TSSOP Ordering Information (continued) PART TEMP RANGE PIN- PACKAGE TOP MARK MAX439ESA+T -4 C to +85 C 8 SO MAX439EUA+T -4 C to +85 C 8 µmax MAX439EUA/V+T -4 C to +85 C 8 µmax MAX4393EUB+T -4 C to +85 C µmax MAX4394ESD+T -4 C to +85 C 4 SO MAX4394ESD/V+T -4 C to +85 C 4 SO MAX4394EUD+T -4 C to +85 C 4 TSSOP MAX4394EUD/V+T -4 C to +85 C 4 TSSOP MAX4395ESD+T -4 C to +85 C 4 SO MAX4395ESD/V+T -4 C to +85 C 4 SO MAX4395EUD+T -4 C to +85 C 4 TSSOP MAX4395EUD/V+T -4 C to +85 C 4 TSSOP MAX4396EUP+T -4 C to +85 C TSSOP +Denotes a lead(pb)-free/rohs-compliant package. /V denotes an automotive qualified part. T = Tape and reel. Selector Guide PART NO. OF AMPS DISABLE MAX4389 Yes MAX439 No MAX439 No MAX4393 Yes MAX Yes MAX No MAX Yes MAX4389/MAX439/MAX439 MAX4396 5

16 MAX4389/MAX439/MAX439 MAX4396 Package Information For the latest package outline information and land patterns, go to Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE DOCUMENT NO. 6 SC7 X SOT3 U SOT3 U µmax U µmax U SO, 4 SO S8-, S TSSOP, TSSOP U4-, U-3-66 SC7, 6L.EPS 6

17 Package Information (continued) For the latest package outline information and land patterns, go to Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE OUTLINE, SOT 6L BODY -58 I 6LSOT.EPS MAX4389/MAX439/MAX439 MAX4396 7

18 MAX4389/MAX439/MAX439 MAX4396 Package Information (continued) For the latest package outline information and land patterns, go to Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE OUTLINE, SOT 6L BODY -58 I 8

19 Package Information (continued) For the latest package outline information and land patterns, go to Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. SOT-3 5L.EPS MAX4389/MAX439/MAX439 MAX4396 9

20 MAX4389/MAX439/MAX439 MAX4396 Package Information (continued) For the latest package outline information and land patterns, go to Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. α α

21 Package Information (continued) For the latest package outline information and land patterns, go to Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. α α LUMAX.EPS MAX4389/MAX439/MAX439 MAX4396

22 MAX4389/MAX439/MAX439 MAX4396 Package Information (continued) For the latest package outline information and land patterns, go to Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. N TOP VIEW D e B A FRONT VIEW E A H C L SIDE VIEW -8 INCHES DIM A A MIN.53.4 MAX.69. MIN.35. MAX.75.5 B C e.5 BSC.7 BSC E H L VARIATIONS: DIM D D D INCHES PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE,.5" SOIC APPROVAL MILLIMETERS MILLIMETERS MIN MAX MIN MAX N MS AA AB AC DOCUMENT CONTROL NO. REV. -4 B SOICN.EPS

23 Package Information (continued) For the latest package outline information and land patterns, go to Note that a "+", "#", or "-" in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. TSSOP4.4mm.EPS MAX4389/MAX439/MAX439 MAX4396 3

24 MAX4389/MAX439/MAX439 MAX4396 REVISION NUMBER REVISION DATE DESCRIPTION Revision History PAGES CHANGED 4 /9 Added automotive qualified parts, 5 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 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.