19-1369; Rev 1; 2/07 KIT ATION EVALU E L B A IL AVA Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable The MAX4188/MAX4189/MAX4190 are low-power, current-feedback video amplifiers featuring fast disable/enable times and low switching transients. The triple MAX4188 and the single MAX4190 are optimized for applications with closed-loop gains of +2V/V (6dB) or greater and provide a -3dB bandwidth of 200MHz and 185MHz, respectively. The triple MAX4189 is optimized for closed-loop applications with gains of +1V/V (0dB) or greater and provides a 250MHz -3dB bandwidth. These amplifiers feature 0.1dB gain flatness up to 80MHz with differential gain and phase errors of 0.03% and 0.05. These features make the MAX4188 family ideal for video applications. The MAX4188/MAX4189/MAX4190 operate from a +5V single supply or from 2.25V to 5.5V dual supplies. These amplifiers consume only 1.5mA per amplifier and are capable of delivering 55mA of output current, making them ideal for portable and battery-powered equipment. The MAX4188/MAX4189/MAX4190 have a high-speed disable/enable mode that isolates the inputs, places the outputs in a high-impedance state, and reduces the supply current to 450A per amplifier. Each amplifier can be disabled independently. High off isolation, low switching transient, and fast enable/disable times (120ns/35ns) allow these amplifiers to be used in a wide range of multiplexer applications. A settling time of 22ns to 0.1%, a slew rate of up to 350V/s, and low distortion make these devices useful in many generalpurpose, high-speed applications. The MAX4188/MAX4189 are available in a tiny 16-pin QSOP package, and the MAX4190 is available in a space-saving 8-pin MAX(R) package. Features Low Supply Current: 1.5mA per Amplifier Fast Enable/Disable Times: 120ns/35ns Very Low Switching Transient: 45mVp-p High Speed 200MHz -3dB Small-Signal Bandwidth (MAX4188, AVCL +2) 250MHz -3dB Small-Signal Bandwidth (MAX4189, AVCL +1) 185MHz -3dB Small-Signal Bandwidth (MAX4190, AVCL +2) High Slew Rate 350V/s (MAX4188, AVCL +2) 175V/s (MAX4189, AVCL +1) Excellent Video Specifications 85MHz -0.1dB Gain Flatness (MAX4190) 30MHz -0.1dB Gain Flatness (MAX4189) Differential Gain/Phase Errors 0.03%/0.05 (MAX4188) Low-Power Disable Mode Inputs Isolated, Outputs Placed in High-Z Supply Current Reduced to 450A per Amplifier Fast Settling Time of 22ns to 0.1% Low Distortion 70dB SFDR (fc = 5MHz, VO = 2Vp-p, MAX4188) Available in Space-Saving Packages 16-Pin QSOP (MAX4188/MAX4189) 8-Pin MAX (MAX4190) Ordering Information Applications High-Definition Surveillance Video High-Speed Switching/Multiplexing Portable/Battery-Powered Video/Multimedia Systems High-Speed Analog-to-Digital Buffers PART TEMP RANGE PINPACKAGE PKG CODE MAX4188ESD+ -40C to +85C 14 SO S14-1 MAX4188EEE+ -40C to +85C 16 QSOP E16-1 Ordering Information continued at end of data sheet. +Denotes lead-free package. Medical Imaging Selector Guide High-Speed Signal Processing PART OPTIMIZED FOR: AMPLIFIERS PER PKG. MAX4188 AV +2V/V 3 14-pin SO, 16-pin QSOP Pin Configuration appears at end of data sheet. MAX4189 AV +1V/V 3 14-pin SO, 16-pin QSOP MAX is a registered trademark of Maxim Integrated Products, Inc. MAX4190 AV +2V/V 1 8-pin MAX/SO Professional Cameras CCD Imaging Systems RGB Distribution Amplifiers PIN-PACKAGE ________________________________________________________________ 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 MAX4188/MAX4189/MAX4190 General Description MAX4188/MAX4189/MAX4190 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable ABSOLUTE MAXIMUM RATINGS Supply Voltage (VCC to VEE)................................................+12V IN_+, IN_-, DISABLE_ Voltage .........(VEE - 0.3V) to (VCC + 0.3V) Differential Input Voltage (IN_+ to IN_-)..............................1.5V Maximum Current into IN_+ or IN_-..................................10mA Output Short-Circuit Current Duration........................Continuous Continuous Power Dissipation (TA = +70C) 8-Pin SO (derate 5.88mW/C above +70C)...............471mW 8-Pin MAX (derate 4.1mW/C above +70C) ............330mW 14-Pin SO (derate 8.3mW/C above +70C) ..................667mW 16-Pin QSOP (derate 8.3mW/C above +70C)...............667mW Operating Temperature Range............................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+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--Dual Supplies (VCC = +5V; VEE = -5V; IN+ = 0V; DISABLE_ 3.2V; MAX4188: AV = +2V/V, RF = RG = 910 for RL = 1k and RF = RG = 560 for RL = 150; MAX4189: AV = +1V/V, RF = 1600 for RL = 1k and RF = 1100 for RL = 150; MAX4190: AV = +2V/V, RF = RG = 1300 for RL = 1k, RF = RG = 680 for RL = 150; TA = TMIN to TMAX, unless otherwise noted. Typical values are specified at TA = +25C.) PARAMETER CONDITIONS SYMBOL Operating Supply Voltage MIN Inferred from PSRR tests 2.25 Input Voltage Range VCM Guaranteed by CMRR test 3.1 Input Offset Voltage VOS VCM = 0V (Note 1) Input Offset Voltage Tempco TCVOS Input Bias Current (Negative Input) MAX UNITS 5.5 V 6 mV 3.4 1 V 10 Input Offset Voltage Matching Input Bias Current (Positive Input) TYP V/C 1 IB+ IB-3.1V VCM 3.1V, VIN+ - VIN- 1V 10 2 12 A RIN+ Input Resistance (Negative Input) RIN- 300 Input Capacitance (Positive Input) CIN 2.5 pF dB Open-Loop Transresistance CMRR 56 68 -3.1V VOUT 3.1V, RL = 1k 1 7 0.3 2 RL = 1k 3.5 4.0 RL = 150 3.0 3.3 RL = 30 20 55 mA ISC 60 mA ROUT 0.2 TR VSW Output Current IOUT Output Resistance -2.8V VOUT 2.8V, RL = 150 Disabled Output Leakage Current IOUT(OFF) DISABLE_ VIL, VOUT 3.5V (Note 2) Disabled Output Capacitance COUT(OFF) DISABLE_ VIL, VOUT 3.5V DISABLE Low Threshold VIL (Note 3) DISABLE High Threshold VIH (Note 3) IIN VEE DISABLE_ VCC DISABLE Input Current k -3.1V VCM 3.1V Output-Voltage Swing Output Short-Circuit Current 350 A Input Resistance (Positive Input) Common-Mode Rejection Ratio 100 mV 1 0.8 M V 5 5 A pF VCC - 3 VCC - 1.8 V V 0.1 2 A Power-Supply Rejection Ratio (VCC) PSRR+ VEE = -5V, VCC = 4.5V to 5.5V 60 75 dB Power-Supply Rejection Ratio (VEE) PSRR- VCC = 5V, VEE = -4.5V to -5.5V 60 73 dB Quiescent Supply Current (per Amplifier) IS Disabled Supply Current (per Amplifier) IS(OFF) 2 RL = open 1.5 1.85 mA DISABLE_ VIL, RL = open 0.45 0.65 mA _______________________________________________________________________________________ Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable (VCC = +5V; VEE = 0V; IN+ = 2.5V; DISABLE_ 3.2V; RL to VCC / 2; MAX4188: AV = +2V/V, RF = RG = 1.1k for RL = 1k and RF = RG = 620 for RL = 150; MAX4189: AV = +1V/V, RF = 1500 for RL = 1k and RF = 1600 for RL = 150; MAX4190: AV = +2V/V, RF = RG = 1300 for RL = 1k, RF = RG = 680 for RL = 150; TA = TMIN to TMAX, unless otherwise noted. Typical values are specified at TA = +25C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Operating Supply Voltage Input Voltage Range Input Offset Voltage Input Offset Voltage Tempco Inferred from PSRR tests VCM Guaranteed by CMRR test VOS VCM = 2.5V (Note 1) 4.5 1.6 to 3.4 5.5 1.3 to 3.7 1.5 TCVOS Input Offset Voltage Matching V V 6.0 mV 10 V/C 1 mV Input Bias Current (Positive Input) IB+ 1 10 A Input Bias Current (Negative Input) IB- 2 12 A Input Resistance (Positive Input) RIN+ Input Resistance (Negative Input) Input Capacitance (Positive Input) Common-Mode Rejection Ratio Open-Loop Transresistance Output-Voltage Swing Output Current 350 k RIN- 300 CIN 2.5 pF dB CMRR TR Output Resistance 100 1.5V VCM 3.5V 48 65 1.3V VOUT 3.7V, RL = 1k 1.0 6.5 1.45V VOUT 3.55V, RL = 150 0.2 1.0 RL = 1k 1.2 to 3.8 0.9 to 4.1 RL = 150 1.4 to 3.6 1.15 to 3.85 RL = 30 16 VSW IOUT Output Short-Circuit Current 1.6V VCM 3.4V, VIN+ - VIN- 1V M V 28 mA ISC 50 mA ROUT 0.2 Disabled Output Leakage Current IOUT(OFF) Disabled Output Capacitance COUT(OFF) DISABLE_ VIL, 1.2V VOUT 3.8V DISABLE_ VIL, 1.2V VOUT 3.8V (Note 2) DISABLE Low Threshold VIL (Note 3) DISABLE High Threshold VIH (Note 3) DISABLE Input Current IIN 0V DISABLE_ VCC Power-Supply Rejection Ratio (VCC) PSRR+ Quiescent Supply Current (per Amplifier) IS Disabled Supply Current (per Amplifier) IS(OFF) VCC = 4.5V to 5.5V 0.8 5 5 pF VCC - 3 VCC - 1.8 V V 0.1 60 A 2 75 A dB RL = open 1.5 1.85 mA DISABLE_ VIL, RL = open 0.45 0.65 mA _______________________________________________________________________________________ 3 MAX4188/MAX4189/MAX4190 DC ELECTRICAL CHARACTERISTICS--Single Supply MAX4188/MAX4189/MAX4190 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable AC ELECTRICAL CHARACTERISTICS--Dual Supplies (MAX4188) (VCC = +5V, VEE = -5V, VIN = 0V, DISABLE_ 3V, AV = +2V/V, RF = RG = 910 for RL = 1k or RF = RG = 560 for RL = 150; TA = +25C, unless otherwise noted.) PARAMETER Small-Signal -3dB Bandwidth SYMBOL BW-3dB Peaking Bandwidth for 0.1dB Flatness BW0.1dB Large-Signal -3dB Bandwidth BWLS CONDITIONS MIN TYP RL = 1k 200 RL = 150 160 RL = 1k 0.25 RL = 150 0.1 RL = 1k 60 RL = 150 80 VOUT = 2VP-P Slew Rate SR VOUT = 4V step, RL = 150 Settling Time to 0.1% tS VOUT = 4V step RL = 1k 100 RL = 150 100 Positive slew 350 Negative slew 280 22 Rise time 10 Fall time 12 fC = 5MHz, VOUT = 2VP-P RL = 1k 70 RL = 150 56 Second Harmonic Distortion fC = 5MHz, VOUT = 2VP-P RL = 1k -70 RL = 150 -66 Third Harmonic Distortion fC = 5MHz, VOUT = 2VP-P RL = 1k -73 RL = 150 -56 RL = 1k 0.05 RL = 150 0.32 RL = 1k 0.03 RL = 150 0.04 Rise/Fall Time Spurious-Free Dynamic Range VOUT = 4V step SFDR Differential Phase Error DP NTSC Differential Gain Error DG NTSC Input Noise-Voltage Density en f = 10kHz Input Noise-Current Density Output Impedance in f = 10kHz ZOUT f = 10MHz 2 Positive input 4 Negative input 5 MAX UNITS MHz dB MHz MHz V/s V/s ns ns dB dBc dBc degrees % nV/Hz pA/Hz 4 Crosstalk f = 10MHz, input referred -55 dB All Hostile Off-Isolation f = 10MHz, input referred -65 dB 100 MHz Gain Matching to 0.1dB Amplifier Enable Time tON Delay from DISABLE to 90% of VOUT, VIN = 0.5V 120 ns Amplifier Disable Time tOFF Delay from DISABLE to 10% of VOUT, VIN = 0.5V 35 ns Positive transient 30 Negative transient 15 Disable/Enable Switching Transient 4 _______________________________________________________________________________________ mV Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable (VCC = +5V, VEE = -5V, VIN = 0V, DISABLE_ 3V, AV = +1V/V, RF = 1600 for RL = 1k and RF = 1100 for RL = 150; TA = +25C, unless otherwise noted.) PARAMETER Small-Signal -3dB Bandwidth SYMBOL BW-3dB Peaking Bandwidth for 0.1dB Flatness BW0.1dB Large-Signal -3dB Bandwidth BWLS CONDITIONS MIN TYP RL = 1k 250 RL = 150 210 RL = 1k 1.4 RL = 150 0.15 RL = 1k 7 RL = 150 30 VOUT = 2VP-P Slew Rate SR VOUT = 4V step, RL = 150 Settling Time to 0.1% tS VOUT = 4V step RL = 1k 60 RL = 150 55 Positive slew 175 Negative slew 150 28 Rise time 20 Fall time 22 fC = 5MHz, VOUT = 2VP-P RL = 1k 65 RL = 150 51 Second Harmonic Distortion fC = 5MHz, VOUT = 2VP-P RL = 1k -65 RL = 150 -63 Third Harmonic Distortion fC = 5MHz, VOUT = 2VP-P RL = 1k -70 RL = 150 -51 RL = 1k 0.02 RL = 150 0.66 RL = 1k 0.07 RL = 150 0.18 Rise/Fall Time VOUT = 4V step Spurious-Free Dynamic Range SFDR Differential Phase Error DP NTSC Differential Gain Error DG NTSC Input Noise-Voltage Density en f = 10kHz Input Noise-Current Density Output Impedance in f = 10kHz ZOUT f = 10MHz 2 Positive input 4 Negative input 5 MAX UNITS MHz dB MHz MHz V/s V/s ns ns dB dBc dBc degrees % nV/Hz pA/Hz 4 Crosstalk f = 10MHz, input referred -57 dB All Hostile Off-Isolation f = 10MHz, input referred -55 dB 24 MHz Gain Matching to 0.1dB Amplifier Enable Time tON Delay from DISABLE to 90% of VOUT, VIN = 0.5V 120 ns Amplifier Disable Time tOFF Delay from DISABLE to 10% of VOUT, VIN = 0.5V 40 ns Disable/Enable Switching Transient Positive transient 70 Negative transient 110 mV _______________________________________________________________________________________ 5 MAX4188/MAX4189/MAX4190 AC ELECTRICAL CHARACTERISTICS--Dual Supplies (MAX4189) MAX4188/MAX4189/MAX4190 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable AC & DYNAMIC PERFORMANCE--Dual Supplies (MAX4190) (V CC = +5V, V EE = -5V, V IN = 0V, A V = +2V/V; R F = R G = 1300 for R L = 1k and R F = R G = 680 for R L = 150, TA = +25C, unless otherwise noted.) PARAMETER Small-Signal -3dB Bandwidth SYMBOL BWSS Peaking Bandwidth for 0.1dB Flatness BWLS Large-Signal -3dB Bandwidth BWLS Slew Rate Settling Time to 0.1% CONDITIONS TYP RL = 1k 185 RL = 150 150 RL = 1k 0.1 RL = 150 0.1 RL = 1k 85 RL = 150k 75 VO = 2VP-P SR VO = 4V step, RL = 150 tS VO = 2V step RL = 1k 95 RL = 150 95 Positive slew 340 Negative slew 270 22 VO = 4V step, RL = 150 Rise time 10 Fall time 12 Spurious-Free Dynamic Range fC = 5MHz, VO = 2VP-P RL = 1k 61 RL = 150 55 Second Harmonic Distortion fC = 5MHz, VO = 2VP-P RL = 1k -65 RL = 150 -55 Third Harmonic Distortion fC = 5MHz, VO = 2VP-P RL = 1k -73 RL = 150 -61 RL = 1k 0.03 RL = 150 0.07 RL = 1k 0.06 RL = 150 0.45 Rise/Fall Time tR MIN tF Differential Gain Error DG NTSC Differential Phase Error DP NTSC Input Noise-Current Density Input Noise-Voltage Density Output Impedance f = 10kHz en f = 10kHz ZOUT f = 10MHz All Hostile Off-Isolation Positive input 4 Negative input 5 f = 10MHz, input referred 2 MAX UNITS MHz dB MHz MHz V/s ns ns dB dBc dBc degrees degrees pA/Hz nV/Hz 4 -60 dB Turn-On Time from DISABLE tON 120 ns Turn-Off Time from DISABLE tOFF 35 ns Disable/Enable Switching Transient 6 BWLS Positive transient 30 Negative transient 15 _______________________________________________________________________________________ mV Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable (VCC = +5V, VEE = 0V, VIN = 2.5V, DISABLE_ 3V, RL to VCC / 2, AV = +2V/V, RF = RG = 1.1k for RL = 1k to VCC / 2 and RF = RG = 620 for RL = 150; TA = +25C, unless otherwise noted.) PARAMETER Small-Signal -3dB Bandwidth SYMBOL BW-3dB Peaking Bandwidth for 0.1dB Flatness BW0.1dB Large-Signal -3dB Bandwidth BWLS CONDITIONS MIN TYP RL = 1k 185 RL = 150 145 RL = 1k 0.1 RL = 150 0.1 RL = 1k 110 RL = 150 65 VOUT = 2VP-P Slew Rate SR step VOUT OUT = 2V step, RL = 150 Settling Time to 0.1% tS VOUT = 2V step Positive slew 300 V/s Negative slew 230 V/s 20 ns fC = 5MHz, VOUT = 2VP-P RL = 1k 66 RL = 150 56 Second Harmonic Distortion fC = 5MHz, VOUT = 2VP-P RL = 1k -76 RL = 150 -59 Third Harmonic Distortion fC = 5MHz, VOUT = 2VP-P RL = 1k -66 RL = 150 -56 RL = 1k 0.06 RL = 150 0.34 RL = 1k 0.02 RL = 150 0.05 Differential Phase Error DP NTSC Differential Gain Error DG NTSC Input Noise-Voltage Density en f = 10kHz Input Noise-Current Density Output Impedance in f = 10kHz ZOUT f = 10MHz MHz 80 9 SFDR dB RL = 150 Fall time Spurious-Free Dynamic Range MHz 80 8 VOUT = 2V step UNITS RL = 1k Rise time Rise/Fall Time MAX 2 Positive input 4 Negative input 5 MHz ns dB dBc dBc degrees % nV/Hz pA/Hz 4 Crosstalk f = 10MHz, input referred -55 dB All Hostile Off Isolation f = 10MHz, input referred -65 dB 40 MHz Gain Matching to 0.1dB Amplifier Enable Time tON Delay from DISABLE to 90% of VOUT, VIN = 3V 120 ns Amplifier Disable Time tOFF Delay from DISABLE to 10% of VOUT, VIN = 3V 35 ns Positive transient 30 Negative transient 15 Disable/Enable Switching Transient mV _______________________________________________________________________________________ 7 MAX4188/MAX4189/MAX4190 AC ELECTRICAL CHARACTERISTICS--Single Supply (MAX4188) MAX4188/MAX4189/MAX4190 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable AC ELECTRICAL CHARACTERISTICS--Single Supply (MAX4189) (VCC = +5V, VEE = 0V, VIN = 2.5V, DISABLE_ 3V, RL to VCC / 2, AV = +1V/V, RF = 1500 for RL = 1k and RF = 1600 for RL = 150; TA = +25C, unless otherwise noted.) PARAMETER Small-Signal -3dB Bandwidth SYMBOL BW-3dB Peaking Bandwidth for 0.1dB Flatness BW0.1dB Large-Signal -3dB Bandwidth BWLS CONDITIONS MIN TYP RL = 1k 230 RL = 150 190 RL = 1k 1.4 RL = 150 0.15 RL = 1k 7 RL = 150 40 VOUT = 2VP-P Slew Rate SR VOUT = 2V step, RL = 150 Settling Time to 0.1% tS VOUT = 2V step RL = 1k 50 RL = 150 45 Positive slew 160 Negative slew 135 25 Rise time 12 Fall time 15 fC = 5MHz, VOUT = 2VP-P RL = 1k 57 RL = 150 47 Second Harmonic Distortion fC = 5MHz, VOUT = 2VP-P RL = 1k -58 RL = 150 -54 Third Harmonic Distortion fC = 5MHz, VOUT = 2VP-P RL = 1k -57 RL = 150 -47 RL = 1k 0.04 RL = 150 0.66 RL = 1k 0.06 RL = 150 0.17 Rise/Fall Time Spurious-Free Dynamic Range VOUT = 2V step SFDR Differential Phase Error DP NTSC Differential Gain Error DG NTSC Input Noise-Voltage Density en f = 10kHz Input Noise-Current Density Output Impedance in f = 10kHz ZOUT f = 10MHz 2 Positive input 4 Negative input 5 MAX UNITS MHz dB MHz MHz V/s ns ns dB dBc dBc degrees % nV/Hz pA/Hz 4 Crosstalk f = 10MHz, input referred -57 dB All Hostile Off-Isolation f = 10MHz, input referred -55 dB 25 MHz Gain Matching to 0.1dB Amplifier Enable Time tON Delay from DISABLE to 90% of VOUT, VIN = 3V 120 ns Amplifier Disable Time tOFF Delay from DISABLE to 10% of VOUT, VIN = 3V 40 ns Disable/Enable Switching Transient Positive transient 70 Negative transient 110 Note 1: Input Offset Voltage does not include the effect of IBIAS flowing through RF/RG. Note 2: Does not include current through external feedback network. Note 3: Over operating supply-voltage range. 8 _______________________________________________________________________________________ mV Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable (V CC = +5V, V EE = 0V, V IN = 0V, A V = +2V/V; R F = R G = 1500 for R L = 1k and R F = R G = 750 for R L = 150, TA = +25C, unless otherwise noted) PARAMETER Small-Signal -3dB Bandwidth SYMBOL BW-3dB Peaking Bandwidth for 0.1dB Flatness BW0.1dB Large-Signal -3dB Bandwidth BWLS CONDITIONS MIN TYP RL = 1k 165 RL = 150 135 RL = 1k 0.1 RL = 150 0.1 RL = 1k 70 RL = 150 65 VO = 2VP-P RL = 1k 75 RL = 150 75 Positive slew 290 Negative slew 220 SR VO = 2V step, RL = 150 Settling Time to 0.1% tS VO = 2V step Rise/Fall Time tR tF VO = 2V step, RL = 150 Rise time 8 Fall time 9 Spurious-Free Dynamic Range fC = 5MHz, VO = 2VP-P RL = 1k 59 RL = 150 55 Second Harmonic Distortion fC = 5MHz, VO = 2VP-P RL = 1k -59 RL = 150 -55 Third Harmonic Distortion fC = 5MHz, VO = 2VP-P RL = 1k -68 RL = 150 -60 RL = 1k 0.02 RL = 150 0.08 RL = 1k 0.07 RL = 150 0.43 Slew Rate Differential Gain Error DG NTSC Differential Phase Error DP NTSC Input Noise-Voltage Density Input Noise-Current Density Output Impedance 20 f = 10kHz in f = 10kHz ZOUT f = 10MHz All Hostile Off-Isolation 2 Positive input 4 Negative input 5 f = 10MHz, input referred, RL = 150 MAX UNITS MHz dB MHz MHz V/s ns ns dB dBc dBc % degrees nV/Hz pA/Hz 4 -60 dB Turn-On Time from DISABLE tON 120 ns Turn-Off Time from DISABLE tOFF 35 ns Disable/Enable Switching Transient BWLS Positive transient 30 Negative transient 15 mV _______________________________________________________________________________________ 9 MAX4188/MAX4189/MAX4190 AC & DYNAMIC PERFORMANCE--Single Supply (MAX4190) __________________________________________Typical Operating Characteristics (VCC = +5V, VEE = -5V, TA = +25C, unless otherwise noted.) MAX4188 SMALL-SIGNAL GAIN vs. FREQUENCY (SINGLE SUPPLY) 7 6 5 RF = RG = 390 RL = 100 10 100 -0.6 1 100 1000 10 100 MAX4189 GAIN FLATNESS vs. FREQUENCY (DUAL SUPPLIES) 2 -4 -0.2 RF = 1.6k RL = 150 -2 VEE = 0 VIN = 20mVP-P AV = +1V/V -5 100 RF = 680 RL = 100 -0.3 -0.4 -0.6 VIN = 20mVP-P AV = +1V/V -0.7 -0.8 1 1000 10 100 1000 1 10 100 FREQUENCY (MHz) FREQUENCY (MHz) FREQUENCY (MHz) MAX4188 LARGE-SIGNAL GAIN vs. FREQUENCY (DUAL SUPPLIES) MAX4188 LARGE-SIGNAL GAIN vs. FREQUENCY (SINGLE SUPPLY) MAX4188 SMALL-SIGNAL GAIN MATCHING vs. FREQUENCY 8 RF = RG = 560 RL = 150 6 8 RF = RG = 620 RL = 150 7 GAIN (dB) 7 9 5 RF = RG = 910 RL = 1k 6 5 RF = RG = 1.1k RL = 1k 4 3 2 VEE = 0 VIN = 1VP-P AV = +2V/V 2 VIN = 1VP-P AV = +2V/V 1 0 100 FREQUENCY (MHz) 1000 1.5 1000 CH1-CH3 1.0 0.5 0 -0.5 CH2-CH3 -1.0 VIN = 20mVP-P RF = RG = 750 RL = 1k AV = +2V/V -1.5 -2.0 0 10 2.0 GAIN MATCHING (dB) 9 2.5 MAX4188toc08 10 MAX4188toc07 10 1000 -0.5 RF = 910 RL = 100 -6 -6 10 0 -4 VIN = 20mVP-P AV = +1V/V 1 -0.1 -1 RF = 1.1k RL = 150 0 1 -3 RF = 1.1k RL = 150 -3 0.2 0.1 GAIN (dB) GAIN (dB) -2 RF = 1.5k RL = 1k 3 MAX4188toc05 4 MAX4188toc04 RF = 1.6k RL = 1k 0 1 1 MAX4189 SMALL-SIGNAL GAIN vs. FREQUENCY (SINGLE SUPPLY) -1 1 10 MAX4189 SMALL-SIGNAL GAIN vs. FREQUENCY (DUAL SUPPLIES) 1 3 VIN = 20mVP-P AV = +2V/V -0.5 FREQUENCY (MHz) RF = 680 RL = 100 4 RF = RG = 390 RL = 100 FREQUENCY (MHz) 4 -5 -0.2 FREQUENCY (MHz) 3 2 1000 RF = RG = 620 RL = 150 -0.4 0 1 GAIN (dB) VEE = 0V VIN = 20mVP-P AV = +2V/V 1 0 0 -0.1 -0.3 2 VIN = 20mVP-P AV = +2V/V 1 0.1 RF = RG = 620 RL = 150 4 0.2 RF = RG = 1.1k RL = 1k 3 2 10 5 RF = RG = 910 RL = 1k MAX4188toc06 3 6 0.4 0.3 MAX4188toc09 4 RF = RG = 430 RL = 100 8 GAIN (dB) GAIN (dB) 7 9 GAIN (dB) RF = RG = 910k RF = RG = 560 R = 1k L RL = 150 8 10 MAX4188toc02 9 MAX4188toc01 10 MAX4188 GAIN FLATNESS vs. FREQUENCY (DUAL SUPPLIES) MAX4188toc03 MAX4188 SMALL-SIGNAL GAIN vs. FREQUENCY (DUAL SUPPLIES) GAIN (dB) MAX4188/MAX4189/MAX4190 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable CH1-CH2 -2.5 1 10 100 FREQUENCY (MHz) 1000 1 10 100 FREQUENCY (MHz) ______________________________________________________________________________________ 1000 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable MAX4189 LARGE-SIGNAL GAIN vs. FREQUENCY (SINGLE SUPPLY) 3 GAIN (dB) 0 RF = 1.1k RL = 150 0.5 -4 VIN = 2VP-P AV = 1V/V -5 10 100 100 1000 1 MAX4188 CROSSTALK vs. FREQUENCY (DUAL SUPPLIES) -10 VOUT = 2VP-P -20 -70 -40 3RD (RL = 150) -50 2ND (RL = 150) -70 -80 3RD (RL = 1k) -90 3RD (RL = 1k) -100 0.1 1 10 100 -40 -50 -70 -90 -100 -30 -60 2ND (RL = 1k) -80 2ND (RL = 1k) 0.1 1 -80 10 1 100 10 100 FREQUENCY (MHz) FREQUENCY (MHz) FREQUENCY (MHz) MAX4189 HARMONIC DISTORTION vs. FREQUENCY (DUAL SUPPLIES) MAX4189 HARMONIC DISTORTION vs. FREQUENCY (SINGLE SUPPLY) MAX4189 CROSSTALK vs. FREQUENCY (DUAL SUPPLIES) -20 3RD (RL = 150) 2ND (RL = 150) -70 VOUT = 2VP-P -20 DISTORTION (dBc) -30 -10 3RD (RL = 150) -40 2ND (RL = 150) -60 2ND (RL = 1k) -70 -80 -100 3RD (RL = 1k) FREQUENCY (MHz) -50 -70 -80 -100 10 -40 -60 -90 3RD (RL = 1k) 1 -30 -80 2ND (RL = 1k) -90 VOUT = 2VP-P RL = 150 -10 1000 -20 -30 -50 0 CROSSTALK (dBc) VOUT = 2VP-P MAX4188toc17 0 MAX4188toc16 0 1000 -20 -30 -60 VOUT = 2VP-P RL = 150 -10 CROSSTALK (dBc) DISTORTION (dBc) 2ND (RL = 150) 0 MAX4188toc14 0 MAX4188toc13 3RD (RL = 150) 0.1 100 MAX4188 HARMONIC DISTORTION vs. FREQUENCY (SINGLE SUPPLY) VOUT = 2VP-P -40 10 MAX4188 HARMONIC DISTORTION vs. FREQUENCY (DUAL SUPPLIES) -50 -60 10 FREQUENCY (MHz) -40 -50 -2.0 CH_3-CH_2 FREQUENCY (MHz) -30 -10 VIN = 2VP-P RF = 1.6k RL = 1k AV = +1V/V -1.5 FREQUENCY (MHz) -20 -60 0 -0.5 -2.5 1 1000 CH_1-CH_3 CH_1-CH_2 -1.0 VEE = 0 VIN = 2VP-P AV = +1V/V -6 0 -10 RF = 1.6k RL = 150 -2 -3 1 DISTORTION (dBc) 0 -1 -4 -6 DISTORTION (dBc) 1.0 -3 -5 1.5 1 MAX4188toc15 -2 2.0 MAX4188toc18 -1 RF = 1.5k RL = 1k 2 RF = 1.6k RL = 1k 1 MAX4188toc11 2 2.5 GAIN (dB) 3 GAIN (dB) 4 MAX4188toc10 4 MAX4189 SMALL-SIGNAL GAIN MATCHING vs. FREQUENCY MAX4188toc12 MAX4189 LARGE-SIGNAL GAIN vs. FREQUENCY (DUAL SUPPLIES) 100 0.1 1 10 FREQUENCY (MHz) 100 1 10 100 1000 FREQUENCY (MHz) ______________________________________________________________________________________ 11 MAX4188/MAX4189/MAX4190 ____________________________________Typical Operating Characteristics (continued) (VCC = +5V, VEE = -5V, TA = +25C, unless otherwise noted.) ____________________________________Typical Operating Characteristics (continued) (VCC = +5V, VEE = -5V, TA = +25C, unless otherwise noted.) 2.6 2.4 2.2 2.0 1.8 1.6 MAX4188 20 16 910k 910k 12 1k 10k 100k 1M 10M 100M 1G MAX4188toc21 200 150 DUAL SUPPLIES: RL = 1k, AV = +2V/V, RF = RG = 910 FOR MAX4188; AV = +1V/V, RF = 1.6k FOR MAX4189 100 0 100 1k 10k 100k 1M 10M 100M 0.02 1G 0.1 1 2 FREQUENCY (Hz) FREQUENCY (Hz) INPUT AMPLITUDE (Vp-p) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY OUTPUT IMPEDANCE vs. FREQUENCY (DUAL SUPPLIES) SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE -30 VCC (MAX4189) -50 VEE (MAX4189) -60 -70 VEE (MAX4188) 100 10 MAX4189 MAX4188 1 -80 -90 1.6 0.1 -100 0.1 1 10 100 MAX4188toc24 RL = 1k, AV = +2V/V, RF = RG = 910 FOR MAX4188; AV = +1 V/V, RF = 1.6k FOR MAX4189 SUPPLY CURRENT PER AMPLIFIER (mA) OUTPUT IMPEDANCE () VCC (MAX4188) -20 1k MAX4188toc22 0 -10 VCC = 5V; VEE = -5V 1.5 VCC = 5V; VEE = 0 1.4 1.3 1.2 1000 0.1 1 10 100 1000 -40 -20 0 20 40 60 80 FREQUENCY (MHz) TEMPERATURE (C) INPUT OFFSET VOLTAGE (VOS) vs. TEMPERATURE INPUT BIAS CURRENT vs. TEMPERATURE DISABLED SUPPLY CURRENT PER AMPLIFIER vs. TEMPERATURE INPUT BIAS CURRENT (A) 1.4 1.2 1.0 0.8 0.6 4 3 IB - (POSITIVE INPUT) 2 1 0.4 IB - (NEGATIVE INPUT) 0.2 0 0 -20 0 20 40 TEMPERATURE (C) 60 80 -40 -20 0 20 40 TEMPERATURE (C) 60 80 0.5 MAX4188toc27 1.6 MAX4188toc26 5 MAX4188toc25 1.8 DISABLED SUPPLY CURRENT PER AMPLIFIER (mA) FREQUENCY (MHz) 2.0 -40 MAX4188 250 50 4 100 12 MAX4189 300 8 1.4 PSRR (dB) VOUT 24 350 -3dB BANDWIDTH (MHz) 2.8 VIN MAX4188toc20 3.0 28 MAX4188-23 VOLTAGE-NOISE DENSITY (nV/Hz) 3.2 TOTAL VOLTAGE-NOISE DENSITY (nV/Hz) MAX4180 TOC19 3.4 -40 -3dB BANDWIDTH vs. INPUT AMPLITUDE TOTAL VOLTAGE-NOISE DENSITY vs. FREQUENCY (INPUT REFERRED) INPUT VOLTAGE-NOISE DENSITY vs. FREQUENCY VOS (mV) MAX4188/MAX4189/MAX4190 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable VCC = 5V 0.4 VCC = 2.5V 0.3 0.2 -40 -20 0 20 40 TEMPERATURE (C) ______________________________________________________________________________________ 60 80 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable MAX4188 ENABLE/DISABLE RESPONSE (VCC-VOH) AND (VOL-VEE) (mV) VOL - VEE; RL = 150 1.6 1.4 4V MAX4188toc30 MAX4188toc28 1.8 MAX4189 POWER-ON RESPONSE MAX4188toc29 OUTPUT VOLTAGE SWING vs. TEMPERATURE 10V DISABLE VCC 0V 0V 2V VOUT OUT 2V/div 0V 0V VCC - VOH; RL = 150 1.2 VOL - VEE; RL = 1k 1.0 VCC - VOH; RL = 1k 50ns/div AV = +2V/V, RF = RG = 910, RL = 1k, VIN = 1V MAX4188 SMALL-SIGNAL PULSE RESPONSE MAX4188 SMALL-SIGNAL PULSE RESPONSE (WITH CLOAD) 0 20 40 60 80 +25mV IN 200ns/div AV = +1V/V, RL = 1k, RF = 1.6k, VEE = 0 MAX4188 LARGE-SIGNAL PULSE RESPONSE MAX4188toc32 TEMPERATURE (C) -20 MAX4188toc31 -40 +25mV +1V IN IN -25mV -1V -25mV +50mV +50mV +2V OUT OUT OUT -50mV -50mV -2V 10ns/div AV = +2V/V, RF = RG = 910, RL = 1k MAX4188toc33 0.8 10ns/div AV = +2V/V, RF = RG = 910, RL = 1k, CL = 47pF 10ns/div AV = +2V/V, RF = RG = 910, RL = 1k ______________________________________________________________________________________ 13 MAX4188/MAX4189/MAX4190 ____________________________________Typical Operating Characteristics (continued) (VCC = +5V, VEE = -5V, TA = +25C, unless otherwise noted.) ____________________________________Typical Operating Characteristics (continued) (VCC = +5V, VEE = -5V, TA = +25C, unless otherwise noted.) MAX4189 SMALL-SIGNAL PULSE RESPONSE (WITH CLOAD) +2V IN IN IN -50mV -50mV -2V +50mV +50mV +2V OUT OUT OUT -50mV -50mV -2V 10ns/div AV = +1V/V, RF = 1.1k, RL = 150 MAX4189 SWITCHING TRANSIENT OFF-CHANNEL FEEDTHROUGH vs. FREQUENCY (DUAL SUPPLIES) DISABLE 0V 0V OUT OUT 100mV/div 20mV/div -25 RL = 150 OFF-CHANNEL FEEDTHROUGH (dB) MAX4188toc38 3V DISABLE 0V 10ns/div AV = +1V/V, RF = 1.1k, RL = 150 10ns/div AV = +1V/V, RF = 1.6k, RL = 1k, CL = 47pF MAX4188 SWITCHING TRANSIENT 3V MAX4188toc36 +50mV MAX4188toc39 +50mV MAX4189 LARGE-SIGNAL PULSE RESPONSE MAX4188toc35 MAX4188toc34 MAX4189 SMALL-SIGNAL PULSE RESPONSE MAX4188toc37 MAX4188/MAX4189/MAX4190 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable -35 -45 -55 -65 -75 -85 -95 100ns/div AV = +2V/V, RF = 910, RL = 1k, VIN = 0 14 100ns/div AV = +1V/V, RF = 1.6k, RL = 1k, VIN = 0 1 10 100 FREQUENCY (MHz) ______________________________________________________________________________________ 1000 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable PIN MAX4188/MAX4189 MAX4190 NAME FUNCTION SO QSOP SO/MAX 1 1 -- DISABLE1 Disable Control Input for Amplifier 1. Amplifier 1 is enabled when DISABLE1 (VCC - 2V) and disabled when DISABLE1 (VCC - 3V). 2 2 -- DISABLE2 Disable Control Input for Amplifier 2. Amplifier 2 is enabled when DISABLE2 (VCC - 2V) and disabled when DISABLE2 (VCC - 3V). 3 3 -- DISABLE3 Disable Control Input for Amplifier 3. Amplifier 3 is enabled when DISABLE3 (VCC - 2V) and disabled when DISABLE3 (VCC - 3V). 4 4 7 VCC Positive Power Supply. Connect VCC to +5V. 5 5 -- IN1+ Amplifier 1 Noninverting Input 6 6 -- IN1- Amplifier 1 Inverting Input 7 7 -- OUT1 -- 8, 9 1, 5 N.C. 8 10 -- OUT3 9 11 -- IN3- Amplifier 3 Inverting Input 10 12 -- IN3+ Amplifier 3 Noninverting Input 11 13 4 VEE Negative Power Supply. Connect VEE to -5V or to ground for single-supply operation. 12 14 -- IN2+ Amplifier 2 Noninverting Input 13 15 -- IN2- Amplifier 2 Inverting Input 14 16 -- OUT2 -- -- 2 IN- Amplifier Inverting Input -- -- 3 IN+ Amplifier Noninverting Input -- -- 6 OUT Amplifier Output -- -- 8 DISABLE Amplifier 1 Output No Connection. Not internally connected. Amplifier 3 Output Amplifier 2 Output Disable Control Input. Amplifier is enabled when DISABLE (VCC - 2V) and disabled when DISABLE (VCC - 3V). Detailed Description The MAX4188/MAX4189/MAX4190 are very low-power, current-feedback amplifiers featuring bandwidths up to 250MHz, 0.1dB gain flatness to 80MHz, and low differential gain (0.03%) and phase (0.05) errors. These amplifiers achieve very high bandwidth-to-power ratios while maintaining low distortion, wide signal swing, and excellent load-driving capabilities. They are optimized for 5V supplies but are also fully specified for single +5V operation. Consuming only 1.5mA per amplifier, these devices have 55mA output current drive capability and achieve low distortion even while driving 150 loads. Wide bandwidth, low power, low differential phase/gain error, and excellent gain flatness make the MAX4188 family ideal for use in portable video equipment such as video cameras, video switchers, and other batterypowered equipment. Their two-stage design provides higher gain and lower distortion than conventional single-stage, current-feedback amplifiers. This feature, combined with a fast settling time, makes these devices suitable for buffering high-speed analog-to-digital converters. The MAX4188/MAX4189/MAX4190 have a high-speed, low-power disable mode that is activated by driving the amplifiers' DISABLE input low. In the disable mode, the ______________________________________________________________________________________ 15 MAX4188/MAX4189/MAX4190 Pin Descriptions MAX4188/MAX4189/MAX4190 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable amplifiers achieve very high isolation from input to output (65dB at 10MHz), and the outputs are placed into a highimpedance state. These amplifiers achieve low switching-transient glitches (<45mV P-P ) when switching between enable and disable modes. Fast enable/disable times (120ns/35ns), along with high off-isolation and low switching transients, allow these devices to be used as high-performance, high-speed multiplexers. This is achieved by connecting the outputs of multiple amplifiers together and controlling the DISABLE inputs to enable one amplifier and disable all others. The disabled amplifiers present a very light load (1A leakage current and 3.5pF capacitance) to the active amplifier's output. The feedback network impedance of all the disabled amplifiers must still be considered when calculating the total load on the active amplifier output. Figure 1 shows an application circuit using the MAX4188 as a 3:1 video multiplexer. The DISABLE_ logic threshold is typically VCC - 2.5V, independent of VEE. For a single +5V supply or dual 5V supplies, the disable inputs are CMOS-logic compatible. The amplifiers default to the enabled mode if the DISABLE pin is left unconnected. If the DISABLE pin is left floating, take proper care to ensure that no high-frequency signals are coupled to this pin, as this may cause false triggering. +5V 1.0F 0.1F 0.1F 4 560 11 560 6 7 AMP1 87 75 MAX4188 560 560 13 VIN2 VOUT 87 75 75 560 560 9 8 AMP3 10 VIN3 87 75 1 2 3 DISABLE1 DISABLE2 DISABLE3 Figure 1. High-Speed 3:1 Video Multiplexer RG VOUT / VIN = G x [(TZ (S) / TZ(s) + G x (RIN + RF)] where G = AVCL = 1 + (RF / RG), and RIN = 1/gM 300. At low gains, G x RIN < RF. Therefore, the closed-loop bandwidth is essentially independent of closed-loop gain. Similarly TZ > RF at low frequencies, so that: RF RIN +1 +1 VOUT TZ VIN Figure 2. Current-Feedback Amplifier 16 75 CABLE 14 AMP2 12 Theory of Operation VOUT = G = 1 + (RF / RG ) VIN 1.0F 5 VIN1 Applications Information The MAX4188/MAX4189/MAX4190 are current-feedback amplifiers, and their open-loop transfer function is expressed as a transimpedance, VOUT/IIN, or TZ. 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 6dB per octave. Analyzing the follower with gain, as shown in Figure 2, yields the following transfer function: -5V ______________________________________________________________________________________ MAX4188 MAX4189 MAX4190 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable The MAX4188/MAX4189/MAX4190 achieve a high degree of off-isolation (65dB at 10MHz) and low crosstalk (-55dB at 10MHz). The input and output signal traces must be kept from overlapping to achieve high off-isolation. Coupling between the signal traces of different channels will degrade crosstalk. The signal traces of each channel should be kept from overlapping with the signal traces of the other channels. Adequate bypass capacitance at each supply is very important to optimize the high-frequency performance of these amplifiers. Inadequate bypassing will also degrade crosstalk rejection, especially with heavier loads. Use a 1F capacitor in parallel with a 0.01F to 0.1F capacitor between each supply pin and ground to achieve optimum performance. The bypass capacitors should be located as close to the device as possible. A 10F low-ESR tantalum capacitor may be required to produce the best settling time and lowest distortion when large transient currents must be delivered to a load. Choosing Feedback and Gain Resistors The optimum value of the external-feedback (RF) and gain-setting (RG) resistors used with the MAX4188/ MAX4189/MAX4190 depends on the closed-loop gain and the application circuit's load. Table 1 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 3a and 3b show the standard inverting and noninverting configurations. Note that the noninverting circuit gain (Figure 3b) is 1 plus the magnitude of the inverting closed-loop gain. Otherwise, the two circuits are identical. VIN RS RT RG RF RG RF VOUT VOUT RO RO RS VIN RT MAX4188 MAX4189 MAX4190 MAX4188 MAX4189 MAX4190 VOUT = [1+ (RF / RG)] VIN VOUT = -(RF / RG) (VIN) Figure 3a. Inverting Gain Configuration Figure 3b. Noninverting Gain Configuration ______________________________________________________________________________________ 17 MAX4188/MAX4189/MAX4190 Layout and Power-Supply Bypassing As with all wideband amplifiers, a carefully laid out PCB and adequate power-supply bypassing are essential to realizing the optimum AC performance of MAX4188/ MAX4189/MAX4190. The PC board should have at least two layers. Signal and power should be on one layer. A large low-impedance ground plane, as free of voids as possible, should be the other layer. With multilayer boards, locate the ground plane on a layer that incorporates no signal or power traces. Do not use wire-wrap boards or breadboards and sockets. Wire-wrap boards are too inductive. Breadboards and sockets are too capacitive. Surfacemount components have lower parasitic inductance and capacitance, and are therefore preferable to through-hole components. Keep lines as short as possible to minimize parasitic inductance, and avoid 90 turns. Round all corners. Terminate all unused amplifier inputs to ground with a 100 or 150 resistor. MAX4188/MAX4189/MAX4190 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable Table 1a. MAX4188 Recommended Component Values SINGLE SUPPLY DUAL SUPPLIES AV = +5 (V/V) AV = +10 (V/V) RL = 100 RL = 1k RL = 1k RL = 1k RL = 150 560 390 470 470 1.1k 910 560 390 120 51 200 160 145 70 30 AV = +2V/V COMPONENT/ BW COMPONENT/ BW RL = 1k RL = 150 RF () 910 RG () -3dB BW (MHz) AV = +5 V/V AV = +10 V/V RL = 100 RL = 1k RL = 1k 620 430 470 470 1.1k 620 430 120 51 185 145 130 70 30 AV = +2V/V Table 1b. MAX4189 Recommended Component Values COMPONENT/ BW DUAL SUPPLIES SINGLE SUPPLY AV = +1V/V AV = +1V/V RL = 1k RL = 150 RL = 100 RL = 1k RL = 150 RL = 100 RG () 1.6k 1.1k 680 1.5k 1.6k 910 -3dB BW (MHz) 250 210 185 230 190 165 Table 1c. MAX4190 Recommended Component Values SINGLE SUPPLY DUAL SUPPLIES AV = +5 (V/V) AV = +10 (V/V) RL = 100 RL = 1k RL = 1k RL = 1k RL = 150 AV = +2V/V COMPONENT/ BW COMPONENT/ BW RL = 1k RL = 150 AV = +5 V/V AV = +10 V/V RL = 100 RL = 1k RL = 1k AV = +1V/V RF () 1.3k 680 510 470 470 1.5k 750 510 470 470 RG () 1.3k 680 510 120 51 1.5k 750 510 120 51 -3dB BW (MHz) 185 180 135 70 30 165 135 125 70 30 DC and Noise Errors Several major error sources must be considered in any op amp. These apply equally to the MAX4188/ MAX4189/MAX4190. 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 4, the total output offset voltage is determined by the following factors: * The input offset voltage (VOS) times the closed-loop gain (1 = RF / RG). * The positive input bias current (I B+ ) times the source resistor (RS) (usually 50 or 75), plus the negative input bias current (IB-) times the parallel combination of R G and R F . In current-feedback amplifiers, the input bias currents at the IN+ and INterminals do not track each other and may have opposite polarity, so there is no benefit to matching the resistance at both inputs. 18 The equation for the total DC error at the output is: VOUT = [(I ( )( ) B + RS + IB - RF || R RG + VOS 1 + F RG ] ) RF RG IB- VOUT IB+ RS MAX4188 MAX4189 MAX4190 Figure 4. Output Offset Voltage ______________________________________________________________________________________ Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable R en(OUT) = 1 + F x RG 2 [(in + )RS ] + [(in - )RF || Video Line Driver RG 2 ] + (en ) 2 The MAX4188/MAX4189/MAX4190 have a very low, 2nV/Hz noise voltage. The current noise at the positive input (in+) is 4pA/Hz, and the current noise at the inverting input is 5pA/Hz. An example of the DC error calculations, using the MAX4188 typical data and typical operating circuit where R F = R G = 560k (R F || R G =280), and RS = 37.5, gives the following: x 1 10 -6 x 37.5 + 2 x 10 -6 280 VOUT = x 1+ 1 -3 + 1.5 x 10 VOUT = 4.1mV ( ) Calculating the total output noise in a similar manner yields: 2 ( ) en(OUT) = 1 + 1 4 x 10 -12 x 37.5 + 2 5 x 10 -12 x 280 + 2 x 10 -9 The MAX4188/MAX4189/MAX4190 are well suited to drive coaxial transmission lines when the cable is terminated at both ends (Figure 5). Cable frequency response can cause variations in the signal's flatness. See Table 1 for optimum RF and RG values. Driving Capacitive Loads The MAX4188/MAX4189/MAX4190 are optimized for AC performance. Reactive loads decrease phase margin and may produce excessive ringing and oscillation. Unlike most high-speed amplifiers, the MAX4188/ MAX4189/MAX4190 are tolerant of capacitive loads up to 50pF. Capacitive loads greater than 50pF may cause ringing and oscillation. Figure 6a shows a circuit that eliminates this problem. Placing the small (usually 15 to 33) isolation resistor, RS, 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 6b and 6c show the MAX4188 and MAX4189 frequency response with a 100pF capacitive load. Note that in each case, gain peaking is substantially reduced when the 20 resistor is used to isolate the capacitive load from the amplifier output. 2 en(OUT) = 4.8nV / Hz RG 560 RF 560 +5V MAX4188 MAX4189 MAX4190 0.1F RG 75 75 CABLE RS MAX4188 75 CABLE 75 VIDEO IN 75 RF VIDEO OUT VIN CL RL 0.1F -5V Figure 5. Video Line Driver Application Figure 6a. Using an Isolation Resistor (RS) for High Capacitive Loads ______________________________________________________________________________________ 19 MAX4188/MAX4189/MAX4190 With a 200MHz system bandwidth, this calculates to 68VRMS (approximately 408VP-P, choosing the sixsigma value). The total output-referred noise voltage is: 12 5 MAX4188/MAX4190 AV = +2V/V RF = RG = 910 RL = 1k || 100pF VIN = 20mVP-P 10 8 6 MAX4189 AV = +1V/V RF = 1.6k RL = 1k || 100pF VIN = 20mVP-P 4 3 RS = 0 2 4 2 GAIN (dB) GAIN (dB) MAX4188/MAX4189/MAX4190 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable RS = 20 0 -2 1 RS = 20 0 RS = 33 -1 -2 RS = 33 -4 RS = 0 -3 -8 -4 -10 -5 1 10 100 1000 1 FREQUENCY (MHz) 10 100 1000 FREQUENCY (MHz) Figure 6c. Normalized Frequency Response with 100pF Capacitive Load Figure 6b. Normalized Frequency Response with 100pF Capacitive Load Ordering Information (continued) Chip Information MAX4188/4189 TRANSISTOR COUNT: 336 PART TEMP RANGE PINPACKAGE PKG CODE MAX4190 TRANSISTOR COUNT: 112 MAX4189ESD+ -40C to +85C 14 SO S14-1 MAX4189EEE+ -40C to +85C 16 QSOP E16-1 SUBSTRATE CONNECTED TO VEE MAX4190ESA+ -40C to +85C 8 SO S8-2 MAX4190EUA+T -40C to +85C 8 MAX-8 U8-1 +Denotes lead-free package. Pin Configurations TOP VIEW DISABLE1 1 N.C. 1 IN- 2 IN+ 3 VEE 4 8 MAX4190 SO/MAX DISABLE 16 OUT2 DISABLE2 2 15 IN2- DISABLE3 3 14 IN2+ DISABLE2 2 13 IN2- DISABLE3 3 12 IN2+ VCC 4 11 VEE IN1+ 5 7 VCC 6 OUT VCC 4 5 N.C. IN1+ 5 MAX4188 MAX4189 10 IN3+ MAX4188 MAX4189 13 VEE 12 IN3+ IN1- 6 11 IN3- IN1- 6 9 IN3- OUT1 7 10 OUT3 OUT1 7 8 OUT3 N.C. 8 SO 20 DISABLE1 1 14 OUT2 9 QSOP ______________________________________________________________________________________ N.C. Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable N E H INCHES MILLIMETERS MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050 MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 SOICN .EPS DIM A A1 B C e E H L 1.27 VARIATIONS: 1 INCHES TOP VIEW DIM D D D MIN 0.189 0.337 0.386 MAX 0.197 0.344 0.394 MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC D A B e C 0-8 A1 L FRONT VIEW SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, .150" SOIC APPROVAL DOCUMENT CONTROL NO. 21-0041 REV. B 1 1 ______________________________________________________________________________________ 21 MAX4188/MAX4189/MAX4190 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) QSOP.EPS MAX4188/MAX4189/MAX4190 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable PACKAGE OUTLINE, QSOP .150", .025" LEAD PITCH 21-0055 22 ______________________________________________________________________________________ F 1 1 Single/Triple, Low-Glitch, 250MHz, CurrentFeedback Amplifiers with High-Speed Disable E O0.500.1 8 INCHES DIM A A1 A2 b H c D e E H 0.60.1 1 L 1 0.60.1 S BOTTOM VIEW D MIN 0.002 0.030 MAX 0.043 0.006 0.037 0.014 0.010 0.007 0.005 0.120 0.116 0.0256 BSC 0.120 0.116 0.198 0.188 0.026 0.016 6 0 0.0207 BSC 8LUMAXD.EPS 4X S 8 MILLIMETERS MAX MIN 0.05 0.75 1.10 0.15 0.95 0.25 0.36 0.13 0.18 2.95 3.05 0.65 BSC 2.95 3.05 4.78 5.03 0.41 0.66 0 6 0.5250 BSC TOP VIEW A1 A2 e A c b L SIDE VIEW FRONT VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 8L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. 21-0036 REV. J 1 1 Revision History Pages changed at Rev 1: 1-12, 15-17, 19-23 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, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 23 (c) 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc. MAX4188/MAX4189/MAX4190 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)