19-1295; Rev 8; 10/11 UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps The MAX4249-MAX4257 low-noise, low-distortion operational amplifiers offer rail-to-rail outputs and singlesupply operation down to 2.4V. They draw 400A of quiescent supply current per amplifier while featuring ultra-low distortion (0.0002% THD), as well as low input voltage-noise density (7.9nV/Hz) and low input current-noise density (0.5fA/Hz). These features make the devices an ideal choice for portable/battery-powered applications that require low distortion and/or low noise. For additional power conservation, the MAX4249/ MAX4251/MAX4253/MAX4256 offer a low-power shutdown mode that reduces supply current to 0.5A and puts the amplifiers' outputs into a high-impedance state. The MAX4249-MAX4257's outputs swing rail-torail and their input common-mode voltage range includes ground. The MAX4250-MAX4254 are unitygain stable with a gain-bandwidth product of 3MHz. The MAX4249/MAX4255/MAX4256/MAX4257 are internally compensated for gains of 10V/V or greater with a gain-bandwidth product of 22MHz. The single MAX4250/ MAX4255 are available in space-saving 5-pin SOT23 packages. The MAX4252 is available in an 8-bump chipscale package (UCSPTM) and the MAX4253 is available in a 10-bump UCSP. The MAX4250AAUK comes in a 5-pin SOT23 package and is specified for operation over the automotive (-40C to +125C) temperature range. Applications Wireless Communications Devices PA Control Portable/Battery-Powered Equipment Medical Instrumentation ADC Buffers Features o Available in Space-Saving UCSP, SOT23, and MAX(R) Packages o Low Distortion: 0.0002% THD (1k load) o 400A Quiescent Supply Current per Amplifier o Single-Supply Operation from 2.4V to 5.5V o Input Common-Mode Voltage Range Includes Ground o Outputs Swing Within 8mV of Rails with a 10k Load o 3MHz GBW Product, Unity-Gain Stable (MAX4250-MAX4254) 22MHz GBW Product, Stable with AV 10V/V (MAX4249/MAX4255/MAX4256/MAX4257) o Excellent DC Characteristics VOS = 70V IBIAS = 1pA Large-Signal Voltage Gain = 116dB o Low-Power Shutdown Mode Reduces Supply Current to 0.5A Places Outputs in a High-Impedance State o 400pF Capacitive-Load Handling Capability Ordering Information PART MAX4249ESD+ TEMP RANGE PINPACKAGE -40C to +85C 14 SO TOP MARK -- MAX4249EUB+ -40C to +85C 10 MAX -- MAX4250EUK+T -40C to +85C 5 SOT23 ACCI MAX4250AAUK+T -40C to +125C 5 SOT23 AEYJ +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. Ordering Information continued at end of data sheet. Selector Guide appears at end of data sheet. Digital Scales/Strain Gauges Pin/Bump Configurations TOP VIEW (BUMPS ON BOTTOM) 1 2 A OUTA VDD B INA- 3 A1 A2 A3 A4 OUTB OUTB INB- INB+ SHDNB INB- VDD C1 C2 C3 C4 INB+ OUTA INA- INA+ SHDNA B4 B1 C INA+ MAX4252 VSS UCSP MAX4253 VSS UCSP Pin/Bump Configurations continued at end of data sheet. UCSP is a trademark and MAX is a registered trademark of Maxim Integrated Products, Inc. ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. MAX4249-MAX4257 General Description MAX4249-MAX4257 UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps ABSOLUTE MAXIMUM RATINGS Power-Supply Voltage (VDD to VSS) ......................+6.0V to -0.3V Analog Input Voltage (IN_+, IN_-)....(VDD + 0.3V) to (VSS - 0.3V) SHDN Input Voltage ......................................6.0V to (VSS - 0.3V) Output Short-Circuit Duration to Either Supply ..........Continuous Continuous Power Dissipation (TA = +70C) 5-Pin SOT23 (derate 7.1mW/C above +70C)...........571mW 8-Bump UCSP (derate 4.7mW/C above +70C)........379mW 8-Pin MAX (derate 4.5mW/C above +70C) ............362mW 8-Pin SO (derate 5.88mW/C above +70C)...............471mW 10-Bump UCSP (derate 6.1mW/C above +70C) ......484mW 10-Pin MAX (derate 5.6mW/C above +70C) ...........444mW 14-Pin SO (derate 8.33mW/C above +70C)..............667mW Operating Temperature Range ...........................-40C to +85C MAX4250AAUK .............................................-40C to +125C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C Soldering Temperature (reflow) .......................................+260C 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. ELECTRICAL CHARACTERISTICS (VDD = 5V, VSS = 0V, VCM = 0V, VOUT = VDD/2, RL connected to VDD/2, SHDN = VDD, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Notes 2, 3) PARAMETER Supply Voltage Range SYMBOL VDD CONDITIONS (Note 4) MIN 2.4 VDD = 3V Quiescent Supply Current Per Amplifier IQ Normal mode E temperature VDD = 5V 420 MAX4250AAUK Input Offset Voltage Tempco TCVOS E temperature IB Differential Input Resistance Input Common-Mode Voltage Range Common-Mode Rejection Ratio 2 IOS CMRR 575 0.5 1.5 0.75 1.85 0.3 (Note 6) 0.1 (Note 6) TA = -40C to +125C 1500 10 TA = -40C to +125C 100 1000 Guaranteed by CMRR test VSS - 0.2V VCM VDD - 1.1V VDD -1.1 MAX4250AAUK 0 VDD -1.1 E temperature 70 MAX4250AAUK 68 _______________________________________________________________________________________ pA G -0.2 115 pA 1 TA = -40C to +85C E temperature mV 1 50 0.1 A V/C TA = -40C to +85C RIN VCM V 655 0.07 TA = +25C Input Offset Current 5.5 420 MAX4250AAUK TA = +25C Input Bias Current UNITS 675 Shutdown mode (SHDN = VSS) (Note 2) VOS MAX 400 VDD = 5V, UCSP only Input Offset Voltage (Note 5) TYP V dB UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps (VDD = 5V, VSS = 0V, VCM = 0V, VOUT = VDD/2, RL connected to VDD/2, SHDN = VDD, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Notes 2, 3) PARAMETER Power-Supply Rejection Ratio SYMBOL PSRR CONDITIONS VDD - 2.4V to 5.5V RL = 10k to VDD/2; VOUT = 25mV to VDD - 4.97V Large-Signal Voltage Gain Output Voltage Swing Output Voltage Swing AV VOUT VOUT MIN TYP E temperature 75 100 MAX4250AAUK 72 E temperature 80 MAX4250AAUK 77 E temperature 80 MAX4250AAUK 77 Output Leakage Current |VIN+ - VIN-| 10mV; RL = 10k to VDD/2 |VIN+ - VIN-| 10mV, RL = 1k to VDD/2 VDD - VOH VOL - VSS VDD - VOH 116 112 8 7 A (Note 2) SHDN Logic High VIH (Note 2) E 77 A 47 A SHDN = VSS = VDD (Note 2) Slew Rate SR Peak-to-Peak Input-Noise Voltage enP-P Input Voltage-Noise Density en Input Current-Noise Density in mV 100 125 0.001 mA 1.0 A 0.2 X VDD V 0.8 X VDD V 0.5 11 GBW mV 200 225 E Input Capacitance Gain-Bandwidth Product 25 30 20 25 Shutdown mode (SHDN = VSS), VOUT = VSS to VDD (Note 2) VIL IIL/IIH dB 68 SHDN Logic Low SHDN Input Current E A E ISC ILEAK UNITS dB RL = 1k to VDD/2; VOUT = 150V to VDD - 4.75V VOL - VSS Output Short-Circuit Current MAX MAX4250-MAX4254 3 MAX4249/MAX4255/MAX4256/MAX4257 22 MAX4250-MAX4254 0.3 MAX4249/MAX4255/MAX4256/MAX4257 2.1 f = 0.1Hz to 10Hz 760 1.5 A pF MHz V/s f = 10Hz 27 f = 1kHz 8.9 f = 30kHz 7.9 f = 1kHz 0.5 nVP-P nV/Hz fA/Hz _______________________________________________________________________________________ 3 MAX4249-MAX4257 ELECTRICAL CHARACTERISTICS (continued) MAX4249-MAX4257 UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps ELECTRICAL CHARACTERISTICS (continued) (VDD = 5V, VSS = 0V, VCM = 0V, VOUT = VDD/2, RL connected to VDD/2, SHDN = VDD, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Notes 2, 3) PARAMETER Total Harmonic Distortion Plus Noise SYMBOL MAX4250-MAX4254 AV = 1V/V, VOUT = 2VP-P, RL = 1k to GND (Note 7) Phase Margin Delay Time to Enable Power-Up Delay Time TYP f = 1kHz 0.0004 f = 20kHz 0.006 f = 1kHz 0.0012 f = 20kHz 0.007 MAX GM M No sustained oscillations 400 MAX4250-MAX4254, AV = 1V/V 10 MAX4249/MAX4255/MAX4256/MAX4257, AV = 10V/V tEN tPU dB 74 MAX4249/MAX4255/MAX4256/MAX4257, AV = 10V/V 68 IVDD = 5% of normal operation VOUT = 2.5V, VOUT settles to 0.1% Degrees MAX4250-MAX4254 6.7 MAX4249/MAX4255/ MAX4256/MAX4257 1.6 MAX4251/MAX4253 0.8 MAX4249/MAX4256 1.2 MAX4251/MAX4253 8 MAX4249/MAX4256 3.5 s s s VDD = 0 to 5V step, VOUT stable to 0.1% 6 Note 2: SHDN is available on the MAX4249/MAX4251/MAX4253/MAX4256 only. Note 3: All device specifications are 100% tested at TA = +25C. Limits over temperature are guaranteed by design. Note 4: Guaranteed by the PSRR test. Note 5: Offset voltage prior to reflow on the UCSP. Note 6: Guaranteed by design. Note 7: Lowpass-filter bandwidth is 22kHz for f = 1kHz and 80kHz for f = 20kHz. Noise floor of test equipment = 10nV/Hz. 4 pF 12.5 MAX4250-MAX4254, AV = 1V/V To 0.01%, VOUT = 2V step tSH UNITS % MAX4249/MAX4255/ MAX4256/MAX4257 AV = 1V/V, VOUT = 2VP-P, RL = 1k to GND (Note 7) Settling Time Delay Time to Shutdown MIN THD+N Capacitive-Load Stability Gain Margin CONDITIONS _______________________________________________________________________________________ s UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps (VDD = 5V, VSS = 0V, VCM = VOUT = VDD/2, input noise floor of test equipment =10nV/Hz for all distortion measurements, TA = +25C, unless otherwise noted.) OFFSET VOLTAGE vs. TEMPERATURE 100 20 50 0 -50 15 -100 10 -150 0 -250 -40 -20 VOS (V) OUTPUT VOLTAGE vs. OUTPUT LOAD CURRENT 0.4 0.3 VOL 40 0.2 4 5 6 7 8 9 RL = 1k 0.05 RL = 20k 110 0.01 RL = 10k RL = 100k 0 20 40 60 -40 80 140 130 120 AV (dB) RL = 2k 90 110 RL = 20k 70 VDD = 3V RL REFERENCED TO GND RL = 200k 150 200 VOUT SWING FROM EITHER SUPPLY (mV) 250 40 60 80 140 RL = 200k 130 120 110 RL = 20k 100 RL = 2k 80 70 VDD = 3V RL REFERENCED TO GND 60 100 20 90 RL = 2k 70 50 0 LARGE-SIGNAL VOLTAGE GAIN vs. OUTPUT VOLTAGE SWING 80 50 -20 TEMPERATURE (C) 100 90 80 0 RL = 10k RL = 100k 0 -20 LARGE-SIGNAL VOLTAGE GAIN vs. OUTPUT VOLTAGE SWING 100 60 0.03 0.02 MAX4249-57 TOC08 120 RL = 1k TEMPERATURE (C) MAX4249-57 TOC07 130 4.5 0.04 LARGE-SIGNAL VOLTAGE GAIN vs. OUTPUT VOLTAGE SWING RL = 200k 3.5 0.04 0.06 OUTPUT LOAD CURRENT (mA) 140 2.5 0.05 0.07 -40 10 1.5 0.06 AV (dB) 3 0.5 OUTPUT VOLTAGE SWING (VOL) vs. TEMPERATURE 0 2 0 OUTPUT VOLTAGE SWING (VOH) vs. TEMPERATURE 0.01 1 VDD = 5V INPUT COMMON-MODE VOLTAGE (V) 0.02 0 VDD = 3V 50 -50 -0.5 80 0.03 0 100 TEMPERATURE (C) 0.08 0.1 AV (dB) 60 0.09 VDD - VOH (V) OUTPUT VOLTAGE (V) VDD - VOH 20 VOL (V) VDD = 3V OR 5V VDIFF = 10mV 0.5 0.10 MAX4249-57 TOC04 0.6 0 MAX4249-57 TOC05 -200 -95 -75 -55 -35 -13 7 28 49 69 90 110 131 152 172 192 5 150 MAX4249-57 TOC09 25 MAX4249-57 TOC03 150 200 INPUT OFFSET VOLTAGE (V) VCM = 0 200 VOS (V) NUMBER OF UNITS 30 MAX4249-57 TOC02 400 UNITS VCM = 0 TA = +25C 35 250 MAX4249-57 TOC01 40 INPUT OFFSET VOLTAGE vs. INPUT COMMON-MODE VOLTAGE MAX4249 -57TOC06 MAX4251/MAX4256 INPUT OFFSET VOLTAGE DISTRIBUTION 0 50 100 150 200 250 VOUT SWING FROM EITHER SUPPLY (mV) VDD = 5V RL REFERENCED TO GND 60 50 0 50 100 150 200 250 VOUT SWING FROM EITHER SUPPLY (mV) _______________________________________________________________________________________ 5 MAX4249-MAX4257 Typical Operating Characteristics Typical Operating Characteristics (continued) (VDD = 5V, VSS = 0V, VCM = VOUT = VDD/2, input noise floor of test equipment =10nV/Hz for all distortion measurements, TA = +25C, unless otherwise noted.) AV (dB) 100 90 RL = 100k VOUT = 10mV TO 4.99mV 110 80 105 70 -20 SHDN = VSS 380 0.3 360 0.2 340 0.1 320 0 2.3 2.8 3.3 3.8 4.3 4.8 80 30 GAIN 20 60 144 50 108 40 72 30 0 0 -36 120 0.01 0.1 1 1.8 5 MAX4249-57 TOC17 VDD = 3V, 5V RL = 50k CL = 20pF AV = 1000 GAIN 0 144 -10 108 -20 20 36 10 0 0 -36 PHASE -30 -144 -100 -180 10M -40 -180 10M -110 FREQUENCY (Hz) 10k 100k FREQUENCY (Hz) 5.3 1M PSRR+ -70 -144 1k 4.8 VDD = 3V, 5V -60 -40 100 4.3 -50 -30 1M 3.8 -40 -90 100k 3.3 -30 -80 10k 2.8 MAX4250-MAX4254 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 180 72 -10 2.3 SUPPLY VOLTAGE (V) -72 1k RL = 100k 40 -108 100 RL = 1k 80 -20 -72 PHASE -20 80 RL = 10k 100 -108 -10 60 140 VDD = 3V 180 10 40 VCM = 0 VOUT = VDD/2 RL REFERENCED TO GND 160 400 100 0.001 36 180 VDD = 5V MAX4249/MAX4255/MAX4256/MAX4257 GAIN AND PHASE vs. FREQUENCY 40 20 INPUT OFFSET VOLTAGE vs. SUPPLY VOLTAGE MAX4250-MAX4254 GAIN AND PHASE vs. FREQUENCY 50 0 TEMPERATURE (C) OUTPUT VOLTAGE (V) MAX4249-57 TOC16 0.373 -20 60 5.3 5.5 VDD = 3V, 5V RL = 50k CL = 20pF AV = 1000 SHDN = VSS -40 SUPPLY VOLTAGE (V) 60 6 60 1000 GAIN (dB) 1.8 SUPPLY CURRENT (A) 0.4 PHASE (DEGREES) 400 40 2000 SHUTDOWN SUPPLY CURRENT (A) SUPPLY CURRENT (A) 0.5 SHDN = VDD 20 SUPPLY CURRENT vs. OUTPUT VOLTAGE 0.6 420 0 MAX4249-57 TOC14 MAX4249-57 TOC13 0.374 TEMPERATURE (C) SUPPLY CURRENT AND SHUTDOWN SUPPLY CURRENT vs. SUPPLY VOLTAGE PER AMPLIFIER SHDN = VDD 380 340 -40 50 100 150 200 250 VOUT SWING FROM EITHER SUPPLY (mV) VOS (V) 0 400 360 100 50 440 RL = 10k VOUT = 20mV TO 4.975mV RL = 1k VOUT = 150mV TO 4.75mV VDD = 5V RL REFERENCED TO GND 0.375 420 PSRR- 1 10 100 1k 10k 100k FREQUENCY (Hz) _______________________________________________________________________________________ 1M 10M SHUTDOWN SUPPLY CURRENT (A) 115 110 60 440 MAX4249-57 TOC15 RL = 2k RL REFERENCED TO VDD/2 VDD = 5V PHASE (DEGREES) PSRR (dB) AV (dB) 120 120 0.376 PER AMPLIFIER MAX4249-57 TOC18 RL = 20k 130 MAX4249-57 TOC12 460 SUPPLY CURRENT (A) RL = 200k 140 125 MAX4249-57 TOC10 150 SUPPLY CURRENT AND SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE LARGE-SIGNAL VOLTAGE GAIN vs. TEMPERATURE MAX4249-57 TOC11 LARGE-SIGNAL VOLTAGE GAIN vs. OUTPUT VOLTAGE SWING GAIN (dB) MAX4249-MAX4257 UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps (VDD = 5V, VSS = 0V, VCM = VOUT = VDD/2, input noise floor of test equipment =10nV/Hz for all distortion measurements, TA = +25C, unless otherwise noted.) INPUT VOLTAGE-N0ISE DENSITY vs. FREQUENCY 10 1 AV = 1 (MAX4250-MAX4254) 0.1 1k 100k 1M VP-PNOISE = 760nVP-P 0 10 100 10k -100 VIN -20 HD2 HD4 MAX4250-MAX4254 TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT VOLTAGE (VDD = 5V) 10 AV = 10 VIN fO = 3kHz FILTER BW = 30kHz VO -40 10k fO 100k 11k -60 -80 HD2 -100 100k 11k 0.1 RL = 1k 0.01 HD3 HD5 VO RL 1 THD+N (%) fO VOUT = 4VP-P fO = 1kHz 0 1s/div 100k MAX4249-57 TOC23 20 AMPLITUDE (dBc) -60 HD3 RL = 10k -120 -140 -140 -160 10k 15k 10 20k 5k 0 VIN VOUT RL 1 1 MAX4249-57 TOC25 10 VIN AV = 10 VOUT RL 100k 11k THD+N (%) 0.1 RL = 1k 100k fO = 20kHz, FILTER BW = 80kHz 0.001 0 1 1 5 VOUT RL 0.1 R1 R2 AV = 100 R1 = 560, R2 = 53k 0.01 AV = 10 0.001 0.001 3 FILTER BW = 22kHz RL = 10k TO GND VO = 2VP-P AV = 1 fO = 3kHz, FILTER BW = 30kHz OUTPUT VOLTAGE (VP-P) 4 VIN RL = 100k 2 3 R1 = 5.6k, R2 = 53k RL = 10k AV = 10 fO = 3kHz FILTER BW = 30kHz 2 MAX4250-MAX4254 TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY 0.01 0.01 1 OUTPUT VOLTAGE (VP-P) MAX4249/MAX4255/MAX4256/MAX4257 TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT VOLTAGE SWING MAX4250-MAX4254 TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT VOLTAGE SWING (VDD = 3V) 0.1 RL = 100k 0.001 20k FREQUENCY (Hz) FREQUENCY (Hz) 11k 15k 10k THD+N (%) 5k MAX4249-57 TOC26 10 THD+N (%) 1k MAX4249/MAX4255/MAX4256/MAX4257 FFT OF DISTORTION AND NOISE RL = 1k fO = 1kHz AV = 1 MAX4249-57 TOC21 5 10M -40 AMPLITUDE (dBc) 10 MAX4250-MAX4254 FFT OF DISTORTION AND NOISE -20 -120 200nV/div 15 FREQUENCY (Hz) VOUT = 2VP-P -80 20 FREQUENCY (Hz) MAX4249-57 TOC22 0 10k VDD = 3V OR 5V MAX4249-57 TOC24 100 25 MAX4249-57 TOC27 AV = 10 (MAX4249/MAX4255/ MAX4256/MAX4257) 0.1Hz TO 10HzP-P NOISE 30 MAX4249-57 TOC20 MAX4249-57 TOC19 OUTPUT IMPEDANCE () 1000 Vn-EQUIVALENT INPUT NOISE-VOLTAGE (nV/Hz) OUTPUT IMPEDANCE vs. FREQUENCY 0.0001 0 1 2 3 OUTPUT VOLTAGE (VP-P) 4 5 10 100 1k 10k FREQUENCY (Hz) _______________________________________________________________________________________ 7 MAX4249-MAX4257 Typical Operating Characteristics (continued) Typical Operating Characteristics (continued) (VDD = 5V, VSS = 0V, VCM = VOUT = VDD/2, input noise floor of test equipment =10nV/Hz for all distortion measurements, TA = +25C, unless otherwise noted.) MAX4250-MAX4254 TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY MAX4250-MAX4254 SMALL-SIGNAL PULSE RESPONSE 1.5V 0.6V VOUT 20mV/div 0.01 VOUT 200mV/div RL TO VDD/2 MAX4249-57 TOC30 FILTER BW = 80kHz AV = 1 RL = 1k VOUT = 2VP-P MAX4249-57 TOC29 MAX4250-MAX4254 LARGE-SIGNAL PULSE RESPONSE MAX4249-57 TOC28 0.1 THD+N(%) RL TO GND 0.001 0.5V RL TO VDD 0.0001 10 100 1k VDD = 3V RL = 10k CL = 100pF VIN = 1V PULSE VDD = 3V RL = 10k CL = 100pF VIN = 100V PULSE 0.5V 2s/div 2s/div 10k FREQUENCY (Hz) MAX4249/MAX4255/MAX4256/MAX4257 SMALL-SIGNAL PULSE RESPONSE 1.6V VOUT 200mV/div 1V VDD = 3V RL = 10k CL = 100pF VIN = 100mV PULSE AV = 10 2s/div 8 VOUT 50mV/div 1.5V VDD = 3V RL = 10k CL = 100pF VIN = 10mV PULSE AV = 10 2s/div MAX4249-57 TOC33 MAX4249-57 TOC32 2V CHANNEL SEPARATION vs. FREQUENCY 140 130 CHANNEL SEPARATION (dB) MAX4249/MAX4255/MAX4256/MAX4257 LARGE-SIGNAL PULSE RESPONSE MAX4249-57 TOC31 MAX4249-MAX4257 UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps 120 110 100 90 80 70 0 1k 10k 100k FREQUENCY (Hz) _______________________________________________________________________________________ 1M 10M UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps PIN/BUMP MAX4250/ MAX4255 MAX4251/ MAX4256 MAX4252/ MAX4257 MAX4252 MAX4249/ MAX4253 5-PIN SOT23 8-PIN SO/MAX 8-PIN SO/MAX 8-BUMP UCSP 10-BUMP UCSP 10-PIN MAX 14-PIN SO 14-PIN SO 1 6 1, 7 A1, A3 A1, C1 1, 9 1, 13 1, 7, 8, 14 MAX4254 2 4 4 C2 B4 4 4 11 3 3 3, 5 C1, C3 A3, C3 3, 7 3, 11 3, 5, 10, 12 4 2 2, 6 B1, B3 A2, C2 2, 8 2, 12 2, 6, 9, 13 5 7 8 A2 B1 10 14 4 NAME OUT, OUTA, OUTB, OUTC, OUTD VSS IN+, INA+, INB+, INC+, IND+ IN-, INA-, INB-, INC-, INDVDD FUNCTION Amplifier Output Negative Supply. Connect to ground for singlesupply operation Noninverting Amplifier Input Inverting Amplifier Input Positive Supply Shutdown Input, Connect to VDD or leave unconnected for normal operation (amplifier(s) enabled). -- 8 -- -- A4, C4 5, 6 6, 9 -- SHDN, SHDNA, SHDNB -- 1, 5 -- -- -- -- 5, 7, 8, 10 -- N.C. No Connection. Not internally connected. -- -- -- B2 B2, B3 -- -- -- -- Not populated with solder sphere Detailed Description The MAX4249-MAX4257 single-supply operational amplifiers feature ultra-low noise and distortion while consuming very little power. Their low distortion and low noise make them ideal for use as preamplifiers in wide dynamic-range applications, such as 16-bit analog-todigital converters (see Typical Operating Circuit). Their high-input impedance and low noise are also useful for signal conditioning of high-impedance sources, such as piezoelectric transducers. These devices have true rail-to-rail output operation, drive loads as low as 1k while maintaining DC accura- cy, and can drive capacitive loads up to 400pF without oscillation. The input common-mode voltage range extends from VDD - 1.1V to 200mV beyond the negative rail. The push-pull output stage maintains excellent DC characteristics, while delivering up to 5mA of current. The MAX4250-4254 are unity-gain stable, whereas, the MAX4249/MAX4255/MAX4256/MAX4257 have a higher slew rate and are stable for gains 10V/V. The MAX4249/MAX4251/MAX4253/MAX4256 feature a lowpower shutdown mode, which reduces the supply current to 0.5A and disables the outputs. The MAX4250AAUK is specified for operation over the automotive (-40C to +125C) temperature range. _______________________________________________________________________________________ 9 MAX4249-MAX4257 Pin/Bump Description MAX4249-MAX4257 UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps Low Distortion Many factors can affect the noise and distortion that the device contributes to the input signal. The following guidelines offer valuable information on the impact of design choices on Total Harmonic Distortion (THD). Choosing proper feedback and gain resistor values for a particular application can be a very important factor in reducing THD. In general, the smaller the closedloop gain, the smaller the THD generated, especially when driving heavy resistive loads. Large-value feedback resistors can significantly improve distortion. The THD of the part normally increases at approximately 20dB per decade, as a function of frequency. Operating the device near or above the full-power bandwidth significantly degrades distortion. Referencing the load to either supply also improves the part's distortion performance, because only one of the MOSFETs of the push-pull output stage drives the output. Referencing the load to midsupply increases the part's distortion for a given load and feedback setting. (See the Total Harmonic Distortion vs. Frequency graph in the Typical Operating Characteristics.) For gains 10V/V, the decompensated devices MAX4249/MAX4255/MAX4256/MAX4257 deliver the best distortion performance, since they have a higher slew rate and provide a higher amount of loop gain for a given closed-loop gain setting. Capacitive loads below 400pF, do not significantly affect distortion results. Distortion performance remains relatively constant over supply voltages. CZ RF RG VOUT VIN Figure 1. Adding Feed-Forward Compensation AV = 2V/V RF = RG = 10k VIN = 50mV/div 100mV 0 VOUT = 100mV/div 2s/div Low Noise The amplifier's input-referred, noise-voltage density is dominated by flicker noise at lower frequencies, and by thermal noise at higher frequencies. Because the thermal noise contribution is affected by the parallel combination of the feedback resistive network (R F || R G , Figure 1), these resistors should be reduced in cases where the system bandwidth is large and thermal noise is dominant. This noise contribution factor decreases, however, with increasing gain settings. For example, the input noise-voltage density of the circuit with RF = 100k, RG = 11k (AV = 10V/V) is en = 15nV/Hz, en can be reduced to 9nV/Hz by choosing RF = 10k, RG = 1.1k (AV = 10V/V), at the expense of greater current consumption and potentially higher distortion. For a gain of 100V/V with RF = 100k, RG = 1.1k, the en is low (9nV/Hz). Figure 2a. Pulse Response with No Feed-Forward Compensation AV = 2 RF = RG = 100k CZ = 11pF 100mV 50mV/div VIN 0 100mV/div VOUT 2s/div Figure 2b. Pulse Response with 10pF Feed-Forward Compensation 10 ______________________________________________________________________________________ UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps RISO VOUT CL MAX4250 MAX4251 MAX4252 MAX4253 MAX4254 VIN The amplifier's input capacitance is 11pF. If the resistance seen by the inverting input is large (feedback network), this can introduce a pole within the amplifier's bandwidth, resulting in reduced phase margin. Compensate the reduced phase margin by introducing a feed-forward capacitor (CZ) between the inverting input and the output (Figure 1). This effectively cancels the pole from the inverting input of the amplifier. Choose the value of CZ as follows: CZ = 11 x (RF / RG) [pF] Figure 3. Overdriven Input Showing No Phase Reversal 4.25V VOUT 0 4.45V VIN -200mV 0 AV = 1 VDD = 5V RL = 10k In the unity-gain stable MAX4250-MAX4254, the use of a proper C Z is most important for A V = 2V/V, and A V = -1V/V. In the decompensated MAX4249/ MAX4255/MAX4256/MAX4257, CZ is most important for A V = 10V/V. Figures 2a and 2b show transient response both with and without CZ. Using a slightly smaller CZ than suggested by the formula above achieves a higher bandwidth at the expense of reduced phase and gain margin. As a general guideline, consider using CZ for cases where RG || R F is greater than 20k (MAX4250-MAX4254) or greater than 5k (MAX4249/MAX4255/MAX4256/ MAX4257). Applications Information The MAX4249-MAX4257 combine good driving capability with ground-sensing input and rail-to-rail output operation. With their low distortion, low noise, and lowpower consumption, these devices are ideal for use in portable instrumentation systems and other low-power, noise-sensitive applications. 20s/div Figure 4. Rail-to-Rail Output Operation Ground-Sensing and Rail-to-Rail Outputs 5V VOUT 1V/div 0 VDD = 5V RL = 10k AV = 10 f = 1kHz The common-mode input range of these devices extends below ground, and offers excellent commonmode rejection. These devices are guaranteed not to undergo phase reversal when the input is overdriven (Figure 3). Figure 4 showcases the true rail-to-rail output operation of the amplifier, configured with AV = 10V/V. The output swings to within 8mV of the supplies with a 10k load, making the devices ideal in low-supply-voltage applications. Output Loading and Stability 200s/div Figure 5. Capacitive-Load Driving Circuit Even with their low quiescent current of 400A, these amplifiers can drive 1k loads while maintaining excellent DC accuracy. Stability while driving heavy capacitive loads is another key feature. ______________________________________________________________________________________ 11 MAX4249-MAX4257 Using a Feed-Forward Compensation Capacitor, CZ UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps 4.5 140 4.0 UNITY-GAIN BANDWIDTH (MHz) 160 RISO () 120 100 80 60 SHADED AREA INDICATES STABLE OPERATION WITH NO NEED FOR ISOLATION RESISTOR. 40 20 3.0 2.5 2.0 1.5 SHADED AREA INDICATES STABLE OPERATION WITH NO NEED FOR ISOLATION RESISTOR. 1.0 0 10 100 1000 10,000 CAPACITIVE LOADING (pF) Figure 6. Isolation Resistance vs. Capacitive Loading to Minimize Peaking (<2dB) MAX4250-MAX4254 (AV = 1) MAX4249/MAX4255-MAX4257 (AV = 10) RISO = 0 SHADED AREA INDICATES STABLE OPERATION WITH NO NEED FOR ISOLATION RESISTOR. 15 5 0 100 1000 10,000 NOTE: RISO CHOSEN FOR PEAKING <2dB. Figure 8. MAX4250-MAX4254 Unity-Gain Bandwidth vs. Capacitive Load Power Supplies and Layout 10 10 100 For example, if the capacitive load is 1000pF, the corresponding isolation resistor is 150. Figure 7 shows that peaking occurs without the isolation resistor. Figure 8 shows the unity-gain bandwidth vs. capacitive load for the MAX4250-MAX4254. 25 20 10 CAPACITIVE LOAD (pF) NOTE: USING AN ISOLATION RESISTOR REDUCES PEAKING. PEAKING (dB) 3.5 0.5 0 1000 10,000 CAPACITIVE LOAD (pF) Figure 7. Peaking vs. Capacitive Load These devices maintain stability while driving loads up to 400pF. To drive higher capacitive loads, place a small isolation resistor in series between the output of the amplifier and the capacitive load (Figure 5). This resistor improves the amplifier's phase margin by isolating the capacitor from the op amp's output. Reference Figure 6 to select a resistance value that will ensure a load capacitance that limits peaking to <2dB (25%). 12 VDD = 3V The MAX4249-MAX4257 operate from a single 2.4V to 5.5V power supply or from dual supplies of 1.20V to 2.75V. For single-supply operation, bypass the power supply with a 0.1F ceramic capacitor placed close to the VDD pin. If operating from dual supplies, bypass each supply to ground. Good layout improves performance by decreasing the amount of stray capacitance and noise at the op amp's inputs and output. To decrease stray capacitance, minimize PC board trace lengths and resistor leads, and place external components close to the op amp's pins. UCSP Applications Information For the latest application details on UCSP construction, dimensions, tape carrier information, PC board techniques, bump-pad layout, and recommended reflow temperature profile, as well as the latest information on reliability testing results, refer to the Application Note: UCSP--A Wafer-Level Chip-Scale Package on Maxim's web site at www.maxim-ic.com/ucsp. ______________________________________________________________________________________ UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps 5V VDD 50k 2 MAX195 7 (16-BIT ADC) 6 3 VIN MAX4256 4 8 AIN DOUT SHDN SCLK SERIAL INTERFACE CS 5k REF 4.096V VSS -5V SHDN Selector Guide PART GAIN BANDWIDTH (MHz) MINIMUM STABLE GAIN (V/V) NO. OF AMPLIFIERS PER PACKAGE SHUTDOWN MODE MAX4249 22 10 2 Yes PIN-PACKAGE 10-pin MAX, 14-pin SO MAX4250/A 3 1 1 -- MAX4251 3 1 1 Yes 5-pin SOT23 MAX4252 3 1 2 -- MAX4253 3 1 2 Yes MAX4254 3 1 4 -- MAX4255 22 10 1 -- MAX4256 22 10 1 Yes 8-pin MAX/SO MAX4257 22 10 2 -- 8-pin MAX/SO 8-pin MAX/SO 8-pin MAX/SO, 8-bump UCSP 10-pin MAX, 14-pin SO, 10-bump UCSP 14-pin SO 5-pin SOT23 ______________________________________________________________________________________ 13 MAX4249-MAX4257 Typical Operating Circuit MAX4249-MAX4257 UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps Pin/Bump Configurations (continued) TOP VIEW 1 5 N.C. 1 VDD IN- 2 MAX4250 MAX4250A MAX4255 VSS 2 IN+ 3 IN+ 4 VSS 4 IN- VDD INA- 2 6 OUT INA+ 5 N.C. 3 VSS 4 INB- 5 INB+ MAX/SO + 14 VDD 14 OUTD OUTA 1 2 13 IND- 3 12 IND+ 7 INB+ VSS 4 5 6 SHDNB N.C. 5 MAX4249 MAX4253 MAX4254 11 INB+ VDD 4 10 N.C. INB+ 5 10 INC+ SHDNA 6 9 SHDNB INB- 6 9 INC- N.C. 7 8 N.C. OUTB 7 8 OUTC SO SO Ordering Information (continued) TEMP RANGE PINPACKAGE TOP MARK MAX4251ESA+ -40C to +85C 8 SO -- MAX4251EUA+ -40C to +85C 8 MAX -- MAX4252EBL+T -40C to +85C 8 UCSP AAO MAX4252ESA+ -40C to +85C 8 SO -- MAX4252EUA+ -40C to +85C 8 MAX -- MAX4253EBC+T -40C to +85C 10 UCSP AAK MAX4253EUB+ -40C to +85C 10 MAX -- MAX4253ESD+ -40C to +85C 14 SO -- MAX4254ESD+ -40C to +85C 14 SO MAX4255EUK+T -40C to +85C 5 SOT23 MAX4256ESA+ -40C to +85C 8 SO -- ACCJ -- MAX4256EUA+ -40C to +85C 8 MAX -- MAX4257ESA+ -40C to +85C 8 SO -- MAX4257EUA+ -40C to +85C 8 MAX -- 14 6 INA- 4 PART OUTB INA+ INA+ MAX 7 12 INB- INB- MAX4249 MAX4253 MAX4252 MAX4257 VDD 3 OUTB VSS 7 8 13 OUTB 8 SHDNA OUTA 1 2 9 3 SHDN + OUTA 1 10 VDD INA- 2 8 MAX/SO + OUTA 1 INA- MAX4251 MAX4256 3 SOT23 INA+ + + + OUT ______________________________________________________________________________________ 11 VSS UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 5 SOT-23 U5+2 21-0057 90-0174 8 MAX U8+1 21-0036 90-0092 10 MAX U10+2 21-0061 90-0330 3 x 3 CSP B9+5 21-0093 -- 14 SOIC S14+1 21-0041 90-0112 12 CSP B12+4 21-0104 -- ______________________________________________________________________________________ 15 MAX4249-MAX4257 Package Information For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. 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. MAX4249-MAX4257 UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps Package Information (continued) For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. 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. 16 ______________________________________________________________________________________ UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps ______________________________________________________________________________________ 17 MAX4249-MAX4257 Package Information (continued) For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. 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 Information (continued) For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. 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. 9LUCSP, 3x3.EPS MAX4249-MAX4257 UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps 18 ______________________________________________________________________________________ UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps ______________________________________________________________________________________ 19 MAX4249-MAX4257 Package Information (continued) For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. 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. MAX4249-MAX4257 UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps Package Information (continued) For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. 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. 20 ______________________________________________________________________________________ UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps REVISION NUMBER REVISION DATE 8 10/11 DESCRIPTION Added lead-free packaging to the Ordering Information and changed the Input Bias Current and Input Offset Current conditions in the Electrical Characteristics table PAGES CHANGED 1, 2, 14 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. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. 21 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc. MAX4249-MAX4257 Revision History