19-1543; Rev 0; 10/99 ILABLE N KIT AVA EVALUATIO Ultra-High-Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable Features 5000V/s Slew Rate (MAX4444) +2V/V Internally Fixed Gain (MAX4444) External Gain Selection (MAX4445, AVCL +2V/V) 550MHz -3dB Bandwidth -60dB SFDR at 5MHz Low Differential Gain/Phase: 0.07%/0.05 Low Noise: 25nV/Hz at fIN = 100kHz Low-Power Disable Mode Reduces Quiescent Current to 3.5mA Applications Ordering Information Differential-to-Single-Ended Conversion Twisted-Pair to Coaxial Converter PART High-Speed Instrumentation Amplifier Data Acquisition TEMP. RANGE PIN-PACKAGE MAX4444ESE -40C to +85C 16 Narrow SO MAX4445ESE -40C to +85C 16 Narrow SO Medical Instrumentation High-Speed Differential Line Receiver Typical Operating Circuit +5V TOP VIEW 0.1F IN+ SIGNAL INPUT Pin Configuration VCC 1 16 GND VCC 2 15 OUT 14 VEE IN- 3 EN 75 VCC N.C. (RG) 4 OUTPUT OUT MAX4444 VEE 75 IN- REF GND 0.1F N.C. (RG) 5 MAX4444 MAX4445 13 VEE 12 VEE IN+ 6 11 VEE VEE 7 10 REF VEE 8 9 EN SO -5V ( ) ARE FOR MAX4445 ONLY. ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. MAX4444/MAX4445 General Description The MAX4444/MAX4445 differential line receivers offer unparalleled high-speed, low-distortion performance. Using a three op amp instrumentation amplifier architecture, these ICs have symmetrical differential inputs and a single-ended output. They operate from 5V supplies and are capable of driving a 100 load to 3.7V. The MAX4444 has an internally set closed-loop gain of +2V/V, while the MAX4445 is compensated for gains of +2V/V or greater, set by an external resistor. A low-power enable mode reduces current consumption to 3.5mA. Using current-feedback techniques, the MAX4444/ MAX4445 achieve a 550MHz bandwidth while maintaining up to a 5000V/s slew rate. Excellent differential gain/phase and noise specifications make these amplifiers ideal for a wide variety of video and RF signal-processing applications. An evaluation kit is available to speed design. MAX4444/MAX4445 Ultra-High-Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable ABSOLUTE MAXIMUM RATINGS VCC to VEE ...........................................................................+12V Voltage on IN+, IN-, EN, OUT+, OUT-, RG, REF..............................(VEE - 0.3V) to (VCC + 0.3V) Current Into IN+, IN-, RG, EN .............................................20mA Output Short-Circuit Duration ...........................Indefinite to GND Continuous Power Dissipation (TA = +70C) 16-Pin Narrow SO (derate 20mW/C above +70C) ...1600mW Operating Temperature Range ...........................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10sec) .............................+300C 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 = -5V, VEN = 2V, VCM = 0 , RL = , REF = GND, AVCL = +2V/V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER SYMBOL Operating Supply Voltage Range CONDITIONS MIN TYP 4.5 5.5 V 2.9 V VCM Guaranteed by CMRR test -2.9 Differential Input Voltage Range VDIFF Guaranteed by output swing test -1.7 Input Offset Voltage VOS 15 TCVOS 12 Input Bias Current IOS Differential Input Resistance RIN Gain 10 IB Input Offset Current AV -2.9V VIN +2.9V -2.9V VCM +2.9V -3V VOUT +3V Gain Error -3V VOUT +3V, RL = 100 Gain-Error Drift RL = 100 Output Voltage Swing VOUT UNITS Guaranteed by PSRR test Input Common-Mode Voltage Range Input Offset-Voltage Temperature Coefficient MAX MAX4444 MAX4445 MAX4444 V 65 mV V/C 55 A 0.25 45 82 170 2 (1 + 600/RG) 0.5 2 A 2.6 MAX4445 1.7 8 0.003 RL = 100 3.4 3.7 RL = 50 3.3 3.6 k V/V % %/C V Output Current Drive IOUT RL = 30 90 120 mA Power-Supply Rejection Ratio PSRR VS = 4.5V to 5.5V 53 70 dB Common-Mode Rejection Ratio CMRR -2.9V VCM +2.9V 40 55 dB Disable Output Resistance ROUT(OFF) VEN = 0, -3.5V VOUT +3.5V, MAX4444 1.8 V 10 A 2.6 10 A 41 55 3.5 5.5 VIL EN Logic High Threshold VIH EN Logic Input Low Current IIL VEN = 0 2.2 EN Logic Input High Current IIH VEN = 5V VIN = 0, VEN = 5V VIN = 0, VEN = 0 Quiescent Current 2 IQ k 0.8 EN Logic Low Threshold 2 V _______________________________________________________________________________________ mA Ultra-High Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable MAX4444/MAX4445 AC ELECTRICAL CHARACTERISTICS (VCC = +5V, VEE = -5V, VEN = 5V, RL = 100, REF = GND, AVCL = +2V/V, TA = +25C, unless otherwise noted.) PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS Small-Signal -3dB Bandwidth BWSS VOUT = 100mVp-p 550 MHz Large-Signal -3dB Bandwidth BWLS VOUT = 2Vp-p 500 MHz VOUT = 100mVp-p 80 MHz 0.1dB Gain Flatness VOUT = 4V step Slew Rate (Note 1) SR Rise Time (Note 1) VOUT = 2V step MAX4444 MAX4445 3800 MAX4444 2400 MAX4445 2000 VOUT = 1V step 1200 VOUT = 0.5V step 600 tRISE Fall Time (Note 1) tFALL Settling Time 650 VOUT = 4V step 825 VOUT = 2V step 700 VOUT = 1V step 700 VOUT = 0.5V step 700 Settle to 0.1% , VOUT = 2V step SFDR VOUT = 2Vp-p 2nd-Harmonic Distortion VOUT = 2Vp-p 3rd-Harmonic Distortion 5000 VOUT = 2Vp-p 12 fC = 100kHz -65 fC = 5MHz -60 fC = 20MHz -55 fC = 100MHz -35 fC = 100kHz -65 fC = 5MHz -62 fC = 20MHz -50 fC = 100MHz -35 fC = 100kHz -90 fC = 5MHz -72 fC = 20MHz -62 fC = 100MHz V/s V/s ps ps ns dBc dBc dBc -55 Differential Phase Error DP NTSC, RL = 150 0.05 Differential Gain Error DG NTSC, RL = 150 0.07 % Input Noise Voltage Density eN f = 100kHz (Note 2) 25 nV/Hz iN f = 100kHz 1.8 pA/Hz ZOUT f = 10MHz 0.7 Input Noise Current Density Output Impedance degrees Enable Time tSHDN(ON) VIN = 1V, VOUT settle to within 10% 80 ns Disable Time tSHDN(OFF) VIN = 1V, VOUT settle to within 10% 200 ns Power-Up Time tON VIN = 1V, VOUT settle to within 10% 0.5 s Power-Down Time tOFF VIN = 1V, VOUT settle to within 10% 0.3 s Note 1: Input step voltage has <100ps rise (fall) time. Measured at the output from 10% to 90% (90% to 10%) level. Note 2: Includes the current noise contribution through the on-die feedback resistor. _______________________________________________________________________________________ 3 Typical Operating Characteristics (VCC = +5V, VEE = -5V, VEN = 5V, VIN = VIN+ - VIN-, RL = 100, REF = GND, AV = +2V/V, TA = +25C, unless otherwise noted.) 3 3 0.9 2 0.7 0.5 -1 GAIN (dB) 0.6 0 GAIN (dB) 1 1 0 -1 -2 -2 -3 -3 -4 -5 1M 10M 100M 0 1M 10M 100M 100k 1G 10M 100M 1G FREQUENCY (Hz) FREQUENCY (Hz) MAX4445 GAIN FLATNESS vs. FREQUENCY MAX4444 LARGE-SIGNAL GAIN vs. FREQUENCY MAX4445 LARGE-SIGNAL GAIN vs. FREQUENCY 2 0.2 1 GAIN (dB) 0.3 0.1 0 2 1 0 -1 0 -1 -2 -2 -3 -0.2 -3 -4 -0.3 -4 -5 -0.4 -5 10M 100M -6 100k 1G VOUT = 2Vp-p 3 -0.1 1M MAX4445toc06 3 GAIN (dB) 0.4 VOUT = 2Vp-p 4 4 MAX4444toc05 5 MAX4445toc04 VOUT = 100mVp-p 1M 10M 100M 100k 1G 1M 10M 100M FREQUENCY (Hz) MAX4444 SMALL-SIGNAL PULSE RESPONSE MAX4445 SMALL-SIGNAL PULSE RESPONSE MAX4444 LARGE-SIGNAL PULSE RESPONSE INPUT 25mV/div INPUT 25mV/div OUTPUT 50mV/div OUTPUT 50mV/div 5ns/div INPUT 250mV/div OUTPUT 500mV/div 5ns/div 1G MAX4444toc09 FREQUENCY (Hz) MAX4445toc08 FREQUENCY (Hz) MAX4444toc07 100k 1M FREQUENCY (Hz) 0.6 0.5 -0.1 100k 1G 0.3 0.1 VOUT = 100mVp-p -6 100k 0.4 0.2 -5 VOUT = 100mVp-p VOUT = 100mVp-p 0.8 2 -4 4 MAX4444 GAIN FLATNESS vs. FREQUENCY MAX4444toc02 4 GAIN (dB) 4 MAX4444toc01 5 MAX4445 SMALL-SIGNAL GAIN vs. FREQUENCY MAX4444toc03 MAX4444 SMALL-SIGNAL GAIN vs. FREQUENCY GAIN (dB) MAX4444/MAX4445 Ultra-High-Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable 5ns/div _______________________________________________________________________________________ Ultra-High-Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable MAX4445 LARGE-SIGNAL PULSE RESPONSE MAX4444 DIFFERENTIAL GAIN AND PHASE SLEW RATE vs. OUTPUT VOLTAGE SWING MAX4444 4000 0.01 0 -0.01 -0.02 -0.03 -0.04 -0.05 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 IRE MAX4445 HARMONIC DISTORTION vs. FREQUENCY MAX4444 HARMONIC DISTORTION vs. LOAD RESISTANCE MAX4444toc13 -50 2nd HARMONIC -60 -70 -40 2nd HARMONIC -60 -30 -40 -50 10M 1M -90 -100 100M 500k 10M 1M 100M 100 10k FREQUENCY (Hz) LOAD RESISTANCE () MAX4445 HARMONIC DISTORTION vs. LOAD RESISTANCE MAX4444 HARMONIC DISTORTION vs. OUTPUT VOLTAGE SWING MAX4445 HARMONIC DISTORTION vs. OUTPUT VOLTAGE SWING -20 -40 -50 2nd HARMONIC -30 -40 -50 2nd HARMONIC -60 -70 -70 -80 -80 3rd HARMONIC fC = 5MHz -20 DISTORTION (dB) -30 -60 0 -10 0 -10 -30 -40 -50 -80 -90 -90 -100 -100 10k 3rd HARMONIC -70 3rd HARMONIC -100 1k 2nd HARMONIC -60 -90 LOAD RESISTANCE () fC = 5MHz -20 DISTORTION (dB) fC = 5MHz, VOUT = 2Vp-p 100 1k FREQUENCY (Hz) 0 -10 -90 -100 MAX4444toc16 500k 3rd HARMONIC -80 3rd HARMONIC MAX4444toc17 -90 -100 2nd HARMONIC -60 -70 -80 3rd HARMONIC fC = 5MHz, VOUT = 2Vp-p -20 -70 -80 DISTORTION (dB) -30 -50 0 -10 DISTORTION (dB) -30 -40 VOUT = 2Vp-p -20 DISTORTION (dB) DISTORTION (dB) -20 0 -10 MAX4445toc18 MAX4444 HARMONIC DISTORTION vs. FREQUENCY VOUT = 2Vp-p 100 0 OUTPUT VOLTAGE SWING (Vp-p) MAX4445toc14 0 5ns/div MAX4444toc15 2000 MAX4445 0 100 IRE 1000 -10 MAX4444toc12 0 3000 PHASE (degrees) OUTPUT 500mV/div 0.08 0.06 0.04 0.02 0 -0.02 -0.04 -0.06 -0.08 GAIN (%) 5000 SLEW RATE (V/s) INPUT 250mV/div MAX4444/45toc11 MAX4445toc10 6000 0.5 1.5 2.5 3.5 4.5 5.5 OUTPUT VOLTAGE SWING (Vp-p) 6.5 0.5 1.5 2.5 3.5 4.5 5.5 6.5 OUTPUT VOLTAGE SWING (Vp-p) _______________________________________________________________________________________ 5 MAX4444/MAX4445 Typical Operating Characteristics (continued) (VCC = +5V, VEE = -5V, VEN = 5V, VIN = VIN+ - VIN-, RL = 100, REF = GND, AV = +2V/V, TA = +25C, unless otherwise noted.) Typical Operating Characteristics (continued) (VCC = +5V, VEE = -5V, VEN = 5V, VIN = VIN+ - VIN-, RL = 100, REF = GND, AV = +2V/V, TA = +25C, unless otherwise noted.) VOLTAGE SWING vs. LOAD RESISTANCE 3.70 100 MAX4444/45toc22 100 CURRENT NOISE (pA/Hz) MAX4444 3.75 MAX4444/45toc21 MAX4445 3.80 INPUT CURRENT NOISE DENSITY vs. FREQUENCY 1000 VOLTAGE NOISE (nV/Hz) OUTPUT VOLTAGE (V) 3.85 INPUT VOLTAGE NOISE DENSITY vs. FREQUENCY MAX4444/45toc20 3.90 10 3.65 10 3.60 400 800 1200 1600 1 1 2000 10 100 LOAD RESISTANCE () 1 -10 -20 -40 -30 -40 -50 -50 -60 -60 -70 -70 100 1k 10k 100k 1M 10M MAX4444 CLOSED-LOOP OUTPUT IMPEDANCE vs. FREQUENCY 1000 100 10 ZOUT () CMR (dB) -30 10 FREQUENCY (Hz) MAX4444/45toc24 -20 10M 0 MAX4444/45toc23 0 1M COMMON-MODE REJECTION vs. FREQUENCY POWER-SUPPLY REJECTION RATIO vs. FREQUENCY -10 10k 100k 1k FREQUENCY (Hz) MAX4444toc25 0 PSRR (dB) 1 -0.1 -80 -0.01 -80 1M 10M 100M 1G 100k 1M 10M 100M 1G 100k 1M 10M 100M FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) SHUTDOWN RESPONSE MAX4444 RECOMMENDED ISOLATION RESISTANCE vs. CAPACITIVE LOAD INPUT OFFSET VOLTAGE vs. TEMPERATURE 22 RISO () 20 18 16 OUTPUT 1V/div 0 1G MAX4444/45toc28 24 INPUT OFFSET VOLTAGE (mV) SHUTDOWN PULSE 2.5V/div MAX4444toc27 100k MAX4444/45toc26 MAX4444/MAX4445 Ultra-High-Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable -5 -10 -15 14 12 200ns/div -20 8 10 12 14 16 18 20 CAPACITIVE LOAD (pF) 6 22 24 -40 -15 10 35 TEMPERATURE (C) _______________________________________________________________________________________ 60 85 Ultra-High-Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable 6 4 43 42 41 40 39 38 EN = GND 4 3 2 1 37 2 5 QUIESCENT CURRENT (mA) 8 EN = 5V 44 MAX4444/45toc30 10 45 QUIESCENT CURRENT (mA) MAX4444/45toc29 12 INPUT BIAS CURRENT (A) QUIESCENT CURRENT vs. TEMPERATURE QUIESCENT CURRENT vs. TEMPERATURE MAX4444/45toc31 INPUT BIAS CURRENT vs. TEMPERATURE 36 0 0 35 -40 -25 -10 5 20 35 50 65 80 -40 -15 TEMPERATURE (C) 10 35 60 85 -40 -15 10 35 60 85 TEMPERATURE (C) TEMPERATURE (C) Pin Description PIN NAME FUNCTION MAX4444 MAX4445 1, 2 1, 2 VCC Positive Power-Supply Input. Bypass with a 0.1F capacitor to GND. 3 3 IN- Inverting Amplifier Input 4, 5 -- N.C. No Connection. Not internally connected. Connect to GND for best AC performance. -- 4, 5 RG Resistor Gain Input. Connect a resistor between these pins to set closed-loop gain (Figure 1). 6 6 IN+ Noninverting Amplifier Input 7, 8, 11-14 7, 8, 11-14 VEE Negative Supply Input. Bypass with a 0.1F capacitor. 9 9 EN Active-High Enable Input. Connect to VCC for normal operation. Connect to GND for disable mode. 10 10 REF Reference Input. Connect to midpoint of the two power supplies. 15 15 OUT Amplifier Output 16 16 GND Ground _______________________________________________________________________________________ 7 MAX4444/MAX4445 Typical Operating Characteristics (continued) (VCC = +5V, VEE = -5V, VEN = 5V, VIN = VIN+ - VIN-, RL = 100, REF = GND, AV = +2V/V, TA = +25C, unless otherwise noted.) MAX4444/MAX4445 Ultra-High-Speed, Low-Distortion, Differentialto-Single-Ended Line Receivers with Enable IN+ RG RISO RGAIN MAX4444 MAX4445 MAX4445 RG GAIN = 1 + 600 RGAIN Figure 1. Setting the Amplifier Gain CLOAD IN- Figure 2. Using an Isolation Resistor for High Capacitive Loads _______________Detailed Description The MAX4444/MAX4445 differential-to-single-ended line receivers offer high-speed and low-distortion performance, and are ideally suited for video and RF signal-processing applications. These receivers offer a small-signal bandwidth of 550MHz and have a high slew rate of up to 5000V/s. Their 120mA output capability allows them to be directly coupled to data acquisition systems. __________Applications Information Grounding Bypassing Use the following high-frequency design techniques when designing the PC board for the MAX4444/ MAX4445. * Use a multilayer board with one layer dedicated as the ground plane. * Do not use wire wrap or breadboards due to high inductance. * Avoid IC sockets due to high parasitic capacitance and inductance. * Bypass supplies with a 0.1F capacitor. Use surface-mount capacitors to minimize lead inductance. * Keep signal lines as short and straight as possible. Do not make 90 turns. Use rounded corners. Do not cross signal paths if possible. * Ensure that the ground plane is free from voids. Setting Gain (MAX4445) The MAX4445 is stable with a minimum gain configuration of +2V/V. RGAIN, connected between the RG pins, sets the gain of this device as shown in Figure 1. Calculate the expected gain as follows: Gain = (1 + 600 / RGAIN) Driving Capacitive Loads The MAX4444/MAX4445 are designed to drive capacitive loads. However, excessive capacitive loads may cause ringing or instability at the output as the phase margin of the device reduces. Adding a small series isolation resistor at the output helps reduce the ringing but slightly increases gain error (Figure 2). For recommended values, see Typical Operating Characteristics. Coaxial Line Driver The MAX4444/MAX4445 are well suited to drive coaxial cables. Their high output current capability can easily drive the 75 characteristic impedance of common coaxial cables. Adjust the gain of the MAX4445 to compensate for cable losses to maintain the required levels at the input of the next stage. Chip Information TRANSISTOR COUNT: 254 SUBSTRATE CONNECTED TO VEE Low-Power Enable Mode The MAX4444/MAX4445 are disabled when EN goes low. This reduces supply current to only 3.5mA. As the output becomes higher impedance, the effective impedance at the output for the MAX4444 is 1.8k. The effective output impedance for the MAX4445 is 1.8k plus RGAIN. 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. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.