19-2200; Rev 0; 10/01 Single-Supply, 150MHz, 16-Bit Accurate, Ultra-Low Distortion Op Amps ________________________Applications High-Speed 14- and 16-Bit ADC Preamplifiers Low-Noise Preamplifiers IF/RF Amplifiers Low-Distortion Active Filters High-Performance Receivers Precision Instrumentation ____________________________Features ♦ 16-Bit Accurate Settling in 23ns (MAX4435/MAX4437) ♦ 97dB SFDR at 1MHz, 4Vp-p Output ♦ 2.2nV/√Hz Input Voltage Noise Density ♦ 100dB (min) Open-Loop Gain ♦ 388V/µs Slew Rate (MAX4435/MAX4437) ♦ 65mA High Output Drive ♦ Available in Space-Saving Packages 5-Pin SOT23 (MAX4434/MAX4435) 8-Pin µMAX (MAX4436/MAX4437) Ordering Information PART TEMP. RANGE PIN-PACKAGE MAX4434EUK-T -40°C to +85°C 5 SOT23-5 MAX4434ESA -40°C to +85°C 8 SO MAX4435EUK-T -40°C to +85°C 5 SOT23-5 MAX4435ESA -40°C to +85°C 8 SO MAX4436EUA -40°C to +85°C 8 µMAX MAX4436ESA -40°C to +85°C 8 SO MAX4437EUA -40°C to +85°C 8 µMAX MAX4437ESA -40°C to +85°C 8 SO Selector Guide appears at end of data sheet. Typical Operating Circuit VCC Pin Configurations C1 TOP VIEW HIGH-SPEED 14-/16-BIT ADC MAX4434 MAX4435 OUT 1 VEE 2 IN+ 3 5 VCC 4 IN- 1 5 2 IN 3 MAX4434 MAX4435 4 SOT23-5 Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX4434–MAX4437 General Description The MAX4434/MAX4435 single and MAX4436/MAX4437 dual operational amplifiers feature wide bandwidth, 16bit settling time in 23ns, and low-noise/low-distortion operation. The MAX4434/MAX4436 are compensated for unity-gain stability and have a small-signal -3dB bandwidth of 150MHz. The MAX4435/MAX4437 are compensated for closed-loop gains of +5 or greater and have a small-signal, -3dB bandwidth of 150MHz. The MAX4434–MAX4437 op amps require only 15mA of supply current per amplifier while achieving 115dB open-loop gain. Voltage noise density is a low 2.2nV/√Hz and provides 97dB spurious-free dynamic range (SFDR) at 1MHz. These characteristics make these op amps ideal for driving modern, high-speed 14- and 16-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 SOT23 packages and the MAX4436/MAX4437 are available in 8-pin µMAX packages. MAX4434–MAX4437 Single-Supply, 150MHz, 16-Bit Accurate, Ultra-Low Distortion Op Amps ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC - VEE) ...................................................+6V Differential Input Voltage .......................................................+2V Input Voltage Range ........................(VCC + 0.3V) to (VEE - 0.3V) Current into Any Input Pin.................................................±25mA Output Short-Circuit Duration to VCC or VEE ...................(Note 1) Continuous Power Dissipation (TA = +70°C) 5-Pin SOT23 (derate 7.1mW/°C above +70°C) ..........571mW 8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW 8-Pin µMAX (derate 4.5mW/°C above +70°C) ........... 330mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C Note 1: The MAX4434–MAX4437 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 (VCC = +5V, VEE = 0, RL = ∞ to VCC/2, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP Input Common-Mode Voltage Range VCM Input Offset Voltage VOS 1 TCVOS 4 Input Offset Voltage Temperature Coefficient Input Offset Voltage Matching Input Bias Current Input Offset Current Input Resistance Common-Mode Rejection Ratio Open-Loop Gain Guaranteed by CMRR test VEE MAX4436/MAX4437 MAX UNITS VCC - 1 V 3.5 mV µV/°C 0.25 mV IB 14 22 µA IOS 1 5 µA RIN CMRR AVOL Differential Mode -10mV ≤ VIN ≤ +10mV 1 kΩ Common Mode 0 ≤ VCM ≤ (VCC - 1V) 1.7 MΩ dB VEE ≤ VCM ≤ (VCC - 1V) 75 100 (VEE + 0.25) ≤ VOUT ≤ (VCC 0.25), RL = 10kΩ 100 115 (VEE + 0.5) ≤ VOUT ≤ (VCC 0.5), RL = 500Ω 96 Output Voltage Swing VOUT RL = 10kΩ Output Current IOUT RL = 20Ω to Ground Output Short-Circuit Current ISC DC Power-Supply Rejection Ratio PSRR Operating Supply Voltage VS Quiescent Supply Current (Per Amplifier) IS dB 110 VCC - VOH 65 200 VOL - VEE 15 70 Sinking 40 65 Sourcing 35 60 Sinking or sourcing VCC = +4.5V to +5.5V Guaranteed by PSRR test 85 mA ±70 mA 110 dB +4.5 15 +5.5 V 18 mA Note 2: All devices are 100% production tested at +25°C. Specifications over temperature limits are guaranteed by design. 2 mV _______________________________________________________________________________________ Single-Supply, 150MHz, 16-Bit Accurate, Ultra-Low Distortion Op Amps MAX4434–MAX4437 AC ELECTRICAL CHARACTERISTICS (VCC = +5V, VEE = 0, VCM = VCC/2, RL = 500Ω, AVCL = +1, and TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS VOUT = 20mVp-p MAX4434/MAX4436 Small-Signal -3dB Bandwidth BWSS Large-Signal -3dB Bandwidth BWLS Small-Signal 0.1dB Gain Flatness BW0.1dBSS Large-Signal 0.1dB Gain Flatness BW0.1dBLS Slew Rate MIN TYP UNITS 150 MHz VOUT = 20mVp-p MAX4435/MAX4437 (AVCL = +5) 150 VOUT = 2Vp-p MAX4434/MAX4436 28 VOUT = 4Vp-p MAX4435/MAX4437 (AVCL = +5) 25 VOUT = 20mVp-p MAX4434/MAX4436 80 VOUT = 20mVp-p MAX4435/MAX4437 (AVCL = +5) 80 VOUT = 2Vp-p MAX4434/MAX4436 15 VOUT = 4Vp-p MAX4435/MAX4437 (AVCL = +5) 20 VOUT = 2V step MAX4434/MAX4436 133 MHz MHz MHz V/µs SR Rise/Fall Time MAX VOUT = 4V step MAX4435/MAX4437 (AVCL = +5) 388 VOUT = 2V step MAX4434/MAX4436 17 tR , t F ns VOUT = 4V step MAX4435/MAX4437 (AVCL = +5) 10 VOUT = 1.5V to 3.5V step MAX4434/MAX4436 35 VOUT = 1.5V to 3.5V step MAX4435/MAX4437 (AVCL = +5) 23 VOUT = 1V to 4V step MAX4434/MAX4436 42 Output “Glitch” Settling to 16-Bit (0.0015%) 5pF load, CL charged from 1V to 4V 41 ns Output Overload Recovery Time 50% overdrive, settling to 10% accuracy 100 ns fC = 100kHz -92 dB Settling Time to 16-Bit (0.0015%) AC Common-Mode Rejection Ratio tS 0.0015% CMRR ns _______________________________________________________________________________________ 3 AC ELECTRICAL CHARACTERISTICS (continued) (VCC = +5V, VEE = 0, VCM = VCC/2, RL = 500Ω, AVCL = +1, and TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL AC Power-Supply Rejection Ratio CONDITIONS MIN TYP fC = 100kHz PSRR Spurious-Free Dynamic Range SFDR MAX UNITS -101 VOUT = 2Vp-p centered at VCC/2 fC = 100kHz -97 fC = 1MHz -98 VOUT = 3Vp-p centered at VCC/2 fC = 100kHz -130 fC = 1MHz -99 VOUT = 4Vp-p centered at VCC/2 fC = 100kHz -112 fC = 1MHz -97 dB dBc Input Noise Voltage Density en fC = 100kHz 2.2 nV/√Hz Input Noise Current Density in fC = 100kHz 2.0 pA/√Hz Input Capacitance CIN 2.3 pF 30 pF Maximum Capacitive Load Without Sustained Oscillations Output Impedance ZOUT Crosstalk fC = 1MHz 0.05 Ω fC = 1MHz, MAX4436/MAX4437 -80 dB Typical Operating Characteristics (VCC = +5V, VEE = 0, RL = 500Ω, CL = 0, TA = +25°C, unless otherwise noted.) 20mVp-p 1 2 20mVp-p 0.3 1 0.2 -1 -0.1 -3 GAIN (dB) 0 -1 GAIN (dB) 0 -2 -2 -3 -0.2 -0.3 -4 -4 -0.4 -5 -5 -0.5 -6 -6 -0.6 -7 -7 1M 10M FREQUENCY (Hz) 100M 1G 20mVp-p 0.1 0 100k 4 3 MAX4434/MAX4436 GAIN FLATNESS vs. FREQUENCY (AVCL = +1V/V) MAX4434-37 toc02 2 MAX4434-37 toc01 3 MAX4435/MAX4437 SMALL-SIGNAL GAIN vs. FREQUENCY (AVCL = +5V/V) MAX4434-37 toc03 MAX4434/MAX4436 SMALL-SIGNAL GAIN vs. FREQUENCY (AVCL = +1V/V) GAIN (dB) MAX4434–MAX4437 Single-Supply, 150MHz, 16-Bit Accurate, Ultra-Low Distortion Op Amps -0.7 100k 1M 10M FREQUENCY (Hz) 100M 1G 100k 1M 10M FREQUENCY (Hz) _______________________________________________________________________________________ 100M 1G Single-Supply, 150MHz, 16-Bit Accurate, Ultra-Low Distortion Op Amps 0.1 0.1 0 -0.1 -0.1 -0.1 -0.2 GAIN (dB) 0 -0.2 -0.3 -0.4 -0.4 -0.4 -0.5 -0.5 -0.5 -0.6 -0.6 -0.6 -0.7 -0.7 100k 100k 1M 10M 100M FREQUENCY (Hz) MAX4434-37 toc07 0 0 -1 -1 -2 10M 100M MAX4434/MAX4436 SMALL-SIGNAL PULSE RESPONSE MAX4434-37 toc08 1 1M FREQUENCY (Hz) 2 1 AVCL = +1V/V INPUT 50mV/div -2 -3 -3 -4 -4 -5 -5 -6 -6 OUTPUT 50mV/div -7 100M 1M 10M FREQUENCY (Hz) 100k AVCL = +1V/V INPUT 1V/div 20ns/div MAX4435/MAX4437 LARGE-SIGNAL PULSE RESPONSE AVCL = +5V/V INPUT 200mV/div OUTPUT 1V/div OUTPUT 1V/div 20ns/div 100M MAX4434/MAX4436 LARGE-SIGNAL PULSE RESPONSE MAX4434-47 toc10 AVCL = +5V/V OUTPUT 50mV/div 10M FREQUENCY (Hz) MAX4435/MAX4437 SMALL-SIGNAL PULSE RESPONSE INPUT 10mV/div 1M 20ns/div 20ns/div _______________________________________________________________________________________ 5 MAX4434-47 toc12 -7 100k 100k 1G 3 2Vp-p GAIN (dB) GAIN (dB) 2 10M 100M FREQUENCY (Hz) MAX4434-47 toc11 3 -0.7 1M MAX4435/MAX4437 LARGE-SIGNAL GAIN vs. FREQUENCY (AVCL = +5V/V) MAX4434/MAX4436 LARGE-SIGNAL GAIN vs. FREQUENCY (AVCL = +1V/V) 4Vp-p -0.2 -0.3 -0.3 MAX4434-37 toc06 0.2 0 GAIN (dB) GAIN (dB) 0.1 0.3 0.2 MAX4434-47 toc09 2Vp-p MAX4434-37 toc05 0.3 MAX4434-37 toc04 0.3 0.2 MAX4435/MAX4437 GAIN FLATNESS vs. FREQUENCY (AVCL = +5V/V) MAX4435/MAX4437 GAIN FLATNESS vs. FREQUENCY (AVCL = +5V/V) MAX4434/MAX4436 GAIN FLATNESS vs. FREQUENCY (AVCL = +1V/V) MAX4434–MAX4437 Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0, RL = 500Ω, CL = 0, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0, RL = 500Ω, CL = 0, TA = +25°C, unless otherwise noted.) MAX4435/MAX4437 SMALL-SIGNAL PULSE RESPONSE INPUT 10mV/div OUTPUT 50mV/div AVCL = +1V/V CL = 30pF INPUT 1V/div OUTPUT 1V/div 20ns/div 20ns/div MAX4435/MAX4437 LARGE-SIGNAL PULSE RESPONSE COMMON-MODE REJECTION RATIO vs. FREQUENCY -30 -50 -70 -90 0 -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -110 20ns/div MAX4434-37 toc18 MAX4434-37 toc17 -10 COMMON-MODE REJECTION RATIO (dB) OUTPUT 1V/div POWER-SUPPLY REJECTION RATIO (dB) MAX4434-47 toc16 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY AVCL = +5V/V CL = 30pF INPUT 200mV/div 20ns/div 0.1 1 10 0.1 100 1 CLOSED-LOOP OUTPUT IMPEDANCE vs. FREQUENCY 6 MAX4435/MAX4437 4 1 0.1 2 0 0.01 0 50 100 150 CAPACITIVE LOAD (pF) 6 10 GAIN (dB) MAX4434/MAX4436 8 200 0.1 1 10 FREQUENCY (MHz) 100 GAIN AND PHASE vs. FREQUENCY MAX4434-37 toc20 10 100 OUTPUT IMPEDANCE (Ω) 12 MAX4434-37 toc19 OUTPUT ISOLATION RESISTANCE vs. CAPACITIVE LOAD 10 FREQUENCY (MHz) FREQUENCY (MHz) 100 1000 MAX4434-37 toc21 70 60 50 40 30 20 10 0 -10 -20 -30 -40 -50 -60 AVCL = 1000V/V GAIN PHASE 10k 100k 1M 10M FREQUENCY (Hz) _______________________________________________________________________________________ 100M 1G 315 270 225 180 135 90 45 0 -45 -90 -135 -180 -225 -270 PHASE (degrees) OUTPUT 50mV/div MAX4434-47 toc15 INPUT 50mV/div AV = +5V/V CL = 15pF MAX4434/MAX4436 LARGE-SIGNAL PULSE RESPONSE MAX4434-47 toc14 AVCL = +1V/V CL = 15pF MAX4434-47 toc13 MAX4434/MAX4436 SMALL-SIGNAL PULSE RESPONSE OUTPUT ISOLATION RESISTANCE (Ω) MAX4434–MAX4437 Single-Supply, 150MHz, 16-Bit Accurate, Ultra-Low Distortion Op Amps Single-Supply, 150MHz, 16-Bit Accurate, Ultra-Low Distortion Op Amps -80 2ND HARMONIC -80 -90 -100 2ND HARMONIC -110 -100 3RD HARMONIC INPUT CURRENT NOISE DENSITY vs. FREQUENCY 10 100 1k 10k 100k -70 -80 2ND HARMONIC 3RD HARMONIC 0 500 1000 1500 2000 0 -20 -40 10 -60 -80 -100 1M -120 1 10 100 1k 10k 100k 1M 0.1 1 10 100 FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (MHz) QUIESCENT CURRENT PER AMPLIFIER vs. TEMPERATURE BIAS CURRENT vs. TEMPERATURE OFFSET VOLTAGE vs. TEMPERATURE 14 13 12 11 10 12 11 10 9 8 -25 0 25 50 TEMPERATURE (°C) 75 100 MAX4434-37 toc30 0.6 0.4 0.2 0 -0.2 -0.4 7 -0.6 6 -0.8 5 -50 0.8 OFFSET VOLTAGE (mV) 13 BIAS CURRENT (µA) 15 14 1000 1.0 MAX4434-37 toc29 15 MAX4434-37 toc28 16 2500 MAX4436/MAX4437 CROSSTALK vs. FREQUENCY 1 1 -60 RESISTIVE LOAD (Ω) 100 1 -50 4.0 GAIN (dB) 10 0 MAX4434-37 toc26 MAX4434-37 toc25 VOLTAGE NOISE (nV/√Hz) 3.5 INPUT VOLTAGE NOISE vs. FREQUENCY 10 100 QUIESCENT CURRENT (mA) 0.5 1.0 1.5 2.0 2.5 3.0 OUTPUT SWING (Vp-p) 1 -40 -110 FREQUENCY (MHz) 0.1 -30 -100 -130 CURRENT NOISE DENSITY (pA/√Hz) -110 VOUT = 1Vp-p f = 500kHz -20 -90 3RD HARMONIC -120 MAX4434-37 toc24 -60 -70 0 -10 MAX4434-37 toc27 -70 f = 500kHz -50 HARMONIC DISTORTION (dB) -60 -40 MAX4434-37 toc23 HARMONIC DISTORTION (dB) VOUT = 2Vp-p HARMONIC DISTORTION (dB) MAX4434-37 toc22 -50 -90 HARMONIC DISTORTION vs. RESISTIVE LOAD HARMONIC DISTORTION vs. OUTPUT SWING HARMONIC DISTORTION vs. FREQUENCY -1.0 -50 -25 0 25 50 TEMPERATURE (°C) 75 100 -50 -25 0 25 50 75 100 TEMPERATURE (°C) _______________________________________________________________________________________ 7 MAX4434–MAX4437 Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0, RL = 500Ω, CL = 0, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (VCC = +5V, VEE = 0, RL = 500Ω, CL = 0, TA = +25°C, unless otherwise noted.) VOLTAGE SWING vs. TEMPERATURE VOLTAGE SWING vs. TEMPERATURE FROM POSITIVE RL = 10kΩ 80 VOLTAGE SWING (mV) 120 90 60 FROM NEGATIVE 30 60 FROM POSITIVE RAIL 40 20 0 -50 -25 0 25 50 75 MAX4434-37 toc32 100 MAX4434-37 toc31 150 VOLTAGE SWING (mV) MAX4434–MAX4437 Single-Supply, 150MHz, 16-Bit Accurate, Ultra-Low Distortion Op Amps FROM NEGATIVE RAIL 0 100 -50 -25 TEMPERATURE (°C) 0 25 50 75 100 TEMPERATURE (°C) Pin Description PIN NAME MAX4434/MAX4435 FUNCTION SOT23 SO 1 6 OUT Output 2 4 VEE Ground 3 3 IN+ Noninverting Input 4 2 IN- Inverting Input 5 7 VCC Positive Power Supply — 1, 5, 8 N.C. No Connection. Not internally connected. PIN MAX4436/MAX4437 FUNCTION NAME SO/µMAX 1 8 OUTA Amplifier A Output 2 INA- Amplifier A Inverting Input 3 INA+ Amplifier A Noninverting Input 4 VEE 5 INB+ Amplifier A Noninverting Input 6 INB- Amplifier A Inverting Input 7 OUTB 8 VCC Ground Amplifier A Output Positive Power Supply _______________________________________________________________________________________ Single-Supply, 150MHz, 16-Bit Accurate, Ultra-Low Distortion Op Amps The MAX4434–MAX4437 are wide-bandwidth, ultra-lowdistortion, voltage-feedback amplifiers. The MAX4434/ MAX4436 are internally compensated for unity gain. The MAX4435/MAX4437 are internally compensated for gains of +5V/V or greater. These amplifiers have ultra-fast 35ns (MAX4434/ MAX4436) 16-bit settling times, -97dB SFDR at 1MHz, and 4Vp-p output swing with minimum 115dB openloop gain. High-Speed ADC Input Driver Application The MAX4434–MAX4437 op amps are ideal for driving high-speed 14- to 16-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 1). Inverting and Noninverting Configurations The circuits typically used for the inverting and noninverting configurations of the MAX4434–MAX4437 are shown in Figures 2a and 2b. The minimum unconditionally stable gain values are 1 for the MAX4434/MAX4436 and 5 for the MAX4435/MAX4437. Use care in selecting the value for the resistor marked RS in both circuits. From dynamic stability considerations (based on the part’s frequency response and the input capacitance of the MAX4434–MAX4437), the maximum recommended value for RS is 500Ω. In general, lower RS 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 RS value, take into consideration that the current indicated as IF is supplied by the output stage and must be discounted from the maximum output current to calculate the maximum current available to the load. IF can be found using the following equation: IF = VIN(MAX) / RS 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 Layout and Power-Supply Bypassing VCC HIGH-SPEED 14/16-BIT ADC VEE Figure 1. Typical Application Circuit The MAX4434–MAX4437 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- RF VIN RS VOUT IF VIN V R A = 1 + F = OUT VIN RS IF VOUT A= RS RF V - RF = OUT VIN RS RB Figure 2a. Noninverting Configuration Figure 2b. Inverting Configuration _______________________________________________________________________________________ 9 MAX4434–MAX4437 Detailed Description MAX4434–MAX4437 Single-Supply, 150MHz, 16-Bit Accurate, Ultra-Low Distortion Op Amps Selector Guide BW (MHz) SETTLING TIME TO 0.0015% (ns) PART AMPS MIN GAIN STABLE (V/V) MAX4434 1 +1 150 35 23 RISO VOUT VIN CL RL MAX4435 1 +5 150 MAX4436 2 +1 150 35 MAX4437 2 +5 150 23 Pin Configurations (continued) MAX4434MAX4437 TOP VIEW Figure 3. Capacitive-Load Driving Circuit 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 1nF and/or 0.1µF surface-mount ceramic capacitors between VCC and the ground plane, located as close to the package as possible. Place a 10µF 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 MAX4434–MAX4437 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). 10 N.C. 1 8 N.C. IN- 2 7 VCC IN+ 3 6 OUT VEE 4 5 N.C. MAX4434 MAX4435 SO MAX4436 MAX4437 OUTA 1 8 VCC INA- 2 7 OUTB INA+ 3 6 INB- VEE 4 5 INB+ µMAX/SO Chip Information MAX4434/MAX4435 TRANSISTOR COUNT: 141 MAX4436/MAX4437 TRANSISTOR COUNT: 318 ______________________________________________________________________________________ Single-Supply, 150MHz, 16-Bit Accurate, Ultra-Low Distortion Op Amps SOT5L.EPS 8LUMAXD.EPS ______________________________________________________________________________________ 11 MAX4434–MAX4437 Package Information Single-Supply, 150MHz, 16-Bit Accurate, Ultra-Low Distortion Op Amps SOICN.EPS MAX4434–MAX4437 Package Information (continued) 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. 12 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2001 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.