19-1295; Rev 7; 4/05 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 Digital Scales/Strain Gauges Features Available in Space-Saving UCSP, SOT23, and MAX(R) Packages Low Distortion: 0.0002% THD (1k load) 400A Quiescent Supply Current per Amplifier Single-Supply Operation from 2.4V to 5.5V Input Common-Mode Voltage Range Includes Ground Outputs Swing Within 8mV of Rails with a 10k Load 3MHz GBW Product, Unity-Gain Stable (MAX4250-MAX4254) 22MHz GBW Product, Stable with AV 10V/V (MAX4249/MAX4255/MAX4256/MAX4257) Excellent DC Characteristics VOS = 70V IBIAS = 1pA Large-Signal Voltage Gain = 116dB Low-Power Shutdown Mode Reduces Supply Current to 0.5A Places Outputs in a High-Impedance State 400pF Capacitive-Load Handling Capability Ordering Information TEMP RANGE PINPACKAGE MAX4249ESD -40C to +85C 14 SO -- MAX4249EUB -40C to +85C 10 MAX -- MAX4250EUK-T -40C to +85C 5 SOT23-5 ACCI MAX4250AAUK-T -40C to +125C 5 SOT23-5 AEYJ PART TOP MARK Ordering Information continued at end of data sheet. Selector Guide appears at end of data sheet. Pin 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 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 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 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 Note 1: 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 Bump Temperature (soldering) (Note 1) Infrared (15s) ................................................................+220C Vapor Phase (60s) ........................................................+215C This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device can be exposed to during board-level solder attach and rework. This limit permits only the use of the solder profiles recommended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and Convection Reflow. Preheating is required. Hand or wave soldering is not allowed. 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 = 0, VCM = 0, VOUT = VDD/2, RL tied 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 Input Bias Current IB Input Offset Current IOS Differential Input Resistance RIN Input Common-Mode Voltage Range VCM E temperature 5.5 V 575 420 655 0.5 1.5 0.07 MAX4250AAUK 0.75 1.85 0.3 (Note 6) (Note 6) E temperature V/C 10 nA 1 100 pA 10 1000 CMRR VSS - 0.2V VCM VDD - 1.1V Power-Supply Rejection Ratio PSRR VDD = 2.4V to 5.5V E temperature mV 100 MAX4250AAUK Guaranteed by CMRR test A 1 MAX4250AAUK E temperature Common-Mode Rejection Ratio 2 UNITS 675 Shutdown mode (SHDN = VSS) (Note 2) VOS MAX 400 VDD = 5V, UCSP only Input Offset Voltage (Note 5) TYP -0.2 VDD -1.1 0 VDD -1.1 E temperature 70 MAX4250AAUK 68 E temperature 75 MAX4250AAUK 72 100 _______________________________________________________________________________________ nA G MAX4250AAUK 115 pA V dB dB UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps (VDD = 5V, VSS = 0, VCM = 0, VOUT = VDD/2, RL tied to VDD/2, SHDN = VDD, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Notes 2, 3) PARAMETER Large-Signal Voltage Gain Output Voltage Swing Output Voltage Swing SYMBOL AV VOUT VOUT CONDITIONS Output Leakage Current 116 E temperature 80 MAX4250AAUK 77 RL = 1k to VDD/2; VOUT = 150V to VDD 4.75V E temperature 80 MAX4250AAUK 77 |VIN+ - VIN-| 10mV; RL = 10k to VDD/2 |VIN+ - VIN-| 10mV, RL = 1k to VDD/2 VDD - VOH VOL - VSS VDD - VOH E A E ILEAK 7 25 30 20 77 200 47 100 A SHDN Logic High VIH (Note 2) A 225 E A SHDN = VSS = VDD (Note 2) Input Capacitance Slew Rate GBW SR Peak-to-Peak Input-Noise Voltage Input Voltage-Noise Density Input Current-Noise Density enP-P en in mV 125 0.001 mA 1.0 A 0.2 X VDD V 0.8 X VDD V 0.5 11 Gain-Bandwidth Product mV 25 E Shutdown mode (SHDN = VSS), VOUT = VSS to VDD (Note 2) (Note 2) UNITS dB 68 VIL IIL/IIH MAX 112 8 ISC SHDN Logic Low SHDN Input Current TYP RL = 10k to VDD/2; VOUT = 25mV to VDD - 4.97V VOL - VSS Output Short-Circuit Current MIN 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 = 0, VCM = 0, VOUT = VDD/2, RL tied 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 = 0, VCM = VOUT = VDD/2, input noise floor of test equipment =10nV/Hz for all distortion measurements, TA = +25C, unless otherwise noted.) MAX4251/MAX4256 INPUT OFFSET VOLTAGE DISTRIBUTION OFFSET VOLTAGE vs. TEMPERATURE 100 25 20 50 0 -50 15 -100 10 -150 5 100 VDD = 3V 50 VDD = 5V 0 -20 OUTPUT VOLTAGE vs. OUTPUT LOAD CURRENT 0.3 VOL 60 RL = 1k 0.05 0.07 3 4 5 6 7 8 9 0.05 0.02 0.01 RL = 10k RL = 100k 10 RL = 20k 110 0 20 40 60 80 -40 LARGE-SIGNAL VOLTAGE GAIN vs. OUTPUT VOLTAGE SWING 140 130 120 AV (dB) RL = 2k 100 110 RL = 20k RL = 200k 100 RL = 2k 80 70 VDD = 3V RL REFERENCED TO GND VDD = 3V RL REFERENCED TO GND 60 0 50 100 150 200 VOUT SWING FROM EITHER SUPPLY (mV) 250 40 60 80 140 RL = 200k 130 120 110 RL = 20k 100 RL = 2k 80 70 70 50 20 90 90 80 0 LARGE-SIGNAL VOLTAGE GAIN vs. OUTPUT VOLTAGE SWING 90 60 -20 TEMPERATURE (C) MAX4249-57 TOC08 120 -20 TEMPERATURE (C) MAX4249-57 TOC07 RL = 200k RL = 10k RL = 100k 0 -40 LARGE-SIGNAL VOLTAGE GAIN vs. OUTPUT VOLTAGE SWING 130 0.03 0.04 OUTPUT LOAD CURRENT (mA) 140 RL = 1k 0.04 0.06 AV (dB) 2 4.5 0.06 0 1 3.5 OUTPUT VOLTAGE SWING (VOL) vs. TEMPERATURE 0.01 0 2.5 OUTPUT VOLTAGE SWING (VOH) vs. TEMPERATURE 0.02 0 1.5 INPUT COMMON-MODE VOLTAGE (V) 0.03 0.1 0.5 TEMPERATURE (C) 0.08 0.2 -50 -0.5 80 0.09 VDD - VOH (V) 0.4 40 MAX4249-57 TOC09 VDD - VOH 20 VOL (V) VDD = 3V OR 5V VDIFF = 10mV 0.5 0.10 MAX4249-57 TOC04 0.6 0 MAX4249 -57TOC06 -40 MAX4249-57 TOC05 -95 -75 -55 -35 -13 7 28 49 69 90 110 131 152 172 192 -250 VOS (V) OUTPUT VOLTAGE (V) 150 -200 0 AV (dB) 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 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 = 0, VCM = VOUT = VDD/2, input noise floor of test equipment =10nV/Hz for all distortion measurements, TA = +25C, unless otherwise noted.) 115 AV (dB) 110 100 90 RL = 100k VOUT = 10mV TO 4.99mV 110 80 105 70 50 50 100 150 200 250 VOUT SWING FROM EITHER SUPPLY (mV) -40 -20 0.6 SHDN = VSS 0.3 360 0.2 340 0.1 320 2.8 3.3 3.8 4.3 4.8 30 GAIN 20 180 60 144 50 108 40 72 30 36 10 0 0 -36 -72 -10 PHASE -20 -108 GAIN (dB) 40 0.1 1 5 1.8 MAX4249-57 TOC17 VDD = 3V, 5V RL = 50k CL = 20pF AV = 1000 GAIN 180 0 144 -10 108 -20 72 20 36 10 0 0 -36 PHASE -10 -80 -90 -144 -100 -180 10M -110 100k FREQUENCY (Hz) 5.3 1M PSRR+ -70 -72 10k 4.8 VDD = 3V, 5V -60 -108 1k 4.3 -50 -20 100 3.8 -40 -30 1M 3.3 -30 -40 FREQUENCY (Hz) 2.8 MAX4250-MAX4254 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY -180 10M 100k 2.3 SUPPLY VOLTAGE (V) -144 10k RL = 100k 40 0.01 -40 1k RL = 1k 80 -30 100 RL = 10k 100 MAX4249/MAX4255/MAX4256/MAX4257 GAIN AND PHASE vs. FREQUENCY PHASE (DEGREES) 50 120 VDD = 3V MAX4250-MAX4254 GAIN AND PHASE vs. FREQUENCY 80 140 400 100 0.001 60 VCM = 0 VOUT = VDD/2 RL REFERENCED TO GND 160 OUTPUT VOLTAGE (V) MAX4249-57 TOC16 40 60 5.3 5.5 VDD = 3V, 5V RL = 50k CL = 20pF AV = 1000 20 180 VDD = 5V SUPPLY VOLTAGE (V) 60 0 INPUT OFFSET VOLTAGE vs. SUPPLY VOLTAGE PSRR (dB) 2.3 -20 TEMPERATURE (C) 1000 0 1.8 -40 80 VOS (V) 0.4 380 0.373 340 60 PHASE (DEGREES) 400 0.5 SHDN = VDD 40 2000 SUPPLY CURRENT (A) 420 20 MAX4249-57 TOC14 MAX4249-57 TOC13 PER AMPLIFIER 0 0.374 SHDN = VSS 360 SUPPLY CURRENT vs. OUTPUT VOLTAGE SHUTDOWN SUPPLY CURRENT (A) 440 SUPPLY CURRENT (A) SHDN = VDD 380 TEMPERATURE (C) SUPPLY CURRENT AND SHUTDOWN SUPPLY CURRENT vs. SUPPLY VOLTAGE 6 400 100 0 0.375 420 RL = 10k VOUT = 20mV TO 4.975mV RL = 1k VOUT = 150mV TO 4.75mV VDD = 5V RL REFERENCED TO GND 60 440 PSRR- 1 10 100 1k 10k 100k FREQUENCY (Hz) _______________________________________________________________________________________ 1M 10M SHUTDOWN SUPPLY CURRENT (A) RL = 2k RL REFERENCED TO VDD/2 VDD = 5V MAX4249-57 TOC18 120 120 0.376 PER AMPLIFIER SUPPLY CURRENT (A) RL = 20k 130 MAX4249-57 TOC12 460 MAX4249-57 TOC11 RL = 200k 140 AV (dB) MAX4249-57 TOC10 150 SUPPLY CURRENT AND SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE LARGE-SIGNAL VOLTAGE GAIN vs. TEMPERATURE 125 MAX4249-57 TOC15 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 = 0, 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 100k -100 VIN -20 HD2 HD4 -140 10 AV = 10 VIN fO = 3kHz FILTER BW = 30kHz 10k fO 100k 11k -60 VO RL 1 VO -40 100k 11k 0.1 RL = 1k -80 HD2 -100 HD5 MAX4250-MAX4254 TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT VOLTAGE (VDD = 5V) THD+N (%) fO VOUT = 4VP-P fO = 1kHz 0 1s/div MAX4249-57 TOC23 20 AMPLITUDE (dBc) -60 HD3 0.01 HD3 RL = 10k -120 -160 15k 20k 10 5k FREQUENCY (Hz) VIN VOUT RL 1 1 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 FILTER BW = 22kHz RL = 10k TO GND VO = 2VP-P AV = 1 fO = 3kHz, FILTER BW = 30kHz 0.0001 0.001 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 MAX4249-57 TOC25 10 0.1 0 20k FREQUENCY (Hz) MAX4250-MAX4254 TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT VOLTAGE SWING (VDD = 3V) 11k 15k 10k THD+N (%) 10k MAX4249-57 TOC26 5k RL = 100k 0.001 -140 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 3 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 = 0, 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 LARGE-SIGNAL PULSE RESPONSE 1.5V 0.01 RL TO VDD/2 0.001 VDD = 3V RL = 10k CL = 100pF VIN = 1V PULSE 0.5V RL TO VDD 0.6V VOUT 20mV/div VOUT 200mV/div RL TO GND MAX4249-57 TOC30 FILTER BW = 80kHz AV = 1 RL = 1k VOUT = 2VP-P MAX4250-MAX4254 SMALL-SIGNAL PULSE RESPONSE MAX4249-57 TOC29 MAX4249-57 TOC28 0.1 THD+N(%) VDD = 3V RL = 10k CL = 100pF VIN = 100V PULSE 0.5V 0.0001 10 100 1k 2s/div 10k 2s/div 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 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) 8 _______________________________________________________________________________________ 1M 10M UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps PIN/BUMP MAX4250/ MAX4255 MAX4251/ MAX4256 MAX4252/ MAX4257 MAX4252 5-PIN SOT23 8-PIN SO/MAX 8-PIN SO/MAX 8-BUMP UCSP MAX4249/ MAX4253 10-BUMP UCSP 10-PIN MAX MAX4254 NAME 14-PIN SO 14-PIN SO OUT, OUTA, OUTB, OUTC, OUTD VSS 1 6 1, 7 A1, A3 A1, C1 1, 9 1, 13 1, 7, 8, 14 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 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 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 (RF || 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, C Z 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 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. VDD = 5V RL = 10k AV = 10 f = 1kHz 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 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 3.5 3.0 2.5 2.0 1.5 SHADED AREA INDICATES STABLE OPERATION WITH NO NEED FOR ISOLATION RESISTOR. 1.0 0 100 10 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. 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 0.5 0 PEAKING (dB) MAX4249-MAX4257 UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps 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 6 3 VIN MAX4256 4 8 (16-BIT ADC) AIN DOUT SHDN SCLK SERIAL INTERFACE CS 5k REF 4.096V VSS -5V SHDN ______________________________________________________________________________________ 13 MAX4249-MAX4257 Typical Operating Circuit MAX4249-MAX4257 UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps Selector Guide PART GAIN BANDWIDTH (MHz) MINIMUM STABLE GAIN (V/V) NO. OF AMPLIFIERS PER PACKAGE SHUTDOWN MODE MAX4249 22 10 2 Yes MAX4250/A 3 1 1 -- MAX4251 3 1 1 Yes MAX4252 3 1 2 -- MAX4253 3 1 2 Yes MAX4254 3 1 4 -- 14-pin SO MAX4255 22 10 1 -- 5-pin SOT23 MAX4256 22 10 1 Yes 8-pin MAX/SO MAX4257 22 10 2 -- 8-pin MAX/SO Ordering Information (continued) TEMP RANGE PINPACKAGE MAX4251ESA -40C to +85C 8 SO MAX4251EUA -40C to +85C 8 MAX MAX4252EBL-T -40C to +85C 8 UCSP-8 MAX4252ESA -40C to +85C 8 SO MAX4252EUA -40C to +85C 8 MAX MAX4253EBC-T -40C to +85C 10 UCSP-10 MAX4253EUB -40C to +85C 10 MAX -- MAX4253ESD -40C to +85C 14 SO -- MAX4254ESD -40C to +85C 14 SO -- MAX4255EUK-T -40C to +85C 5 SOT23-5 MAX4256ESA -40C to +85C 8 SO -- MAX4256EUA -40C to +85C 8 MAX -- MAX4257ESA -40C to +85C 8 SO -- MAX4257EUA -40C to +85C 8 MAX -- PART 14 TOP MARK -- -- AAO PIN-PACKAGE 10-pin MAX, 14-pin SO 5-pin SOT23 8-pin MAX/SO 8-pin MAX/SO, 8-bump UCSP 10-pin MAX, 14-pin SO, 10-bump UCSP Chip Information MAX4250/MAX4251/MAX4255/MAX4256 TRANSISTOR COUNT: 170 MAX4249/MAX4252/MAX4253/MAX4257 TRANSISTOR COUNT: 340 MAX4254 TRANSISTOR COUNT: 680 -- -- AAK ACCJ ______________________________________________________________________________________ UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps TOP VIEW OUT 1 VSS 2 5 VDD IN- 2 MAX4250 MAX4250A MAX4255 IN+ 3 N.C. 1 IN+ 4 IN- 3 VSS 4 INA- 10 VDD 2 MAX4249 MAX4253 7 VDD INA- 2 6 OUT INA+ 5 N.C. OUTA 1 3 9 OUTB INA- 2 INA+ 3 3 8 INB- VSS 4 7 INB+ VSS 4 SHDNA 5 6 SHDNB N.C. 5 MAX4249 MAX4253 VSS 4 VDD 7 OUTB 6 INB- 5 INB+ INA- 2 12 INB- INA+ 3 11 INB+ VDD 4 10 N.C. INB+ 5 9 SHDNB N.C. 7 8 N.C. 14 OUTD OUTA 1 13 OUTB SHDNA 6 SO MAX4252 MAX4257 8 MAX/SO 14 VDD OUTA 1 INA+ MAX SHDN MAX/SO SOT23 OUTA 1 MAX4251 MAX4256 8 13 IND12 IND+ MAX4254 11 VSS 10 INC+ INB- 6 9 INC- OUTB 7 8 OUTC SO ______________________________________________________________________________________ 15 MAX4249-MAX4257 Pin Configurations (continued) Package Information SOT-23 5L .EPS (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 OUTLINE, SOT-23, 5L E 21-0057 4X S 8 8 INCHES DIM A A1 A2 b E O0.500.1 H c D e E H 0.60.1 L 1 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 1 1 8LUMAXD.EPS MAX4249-MAX4257 UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps 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 5.03 4.78 0.41 0.66 0 6 0.5250 BSC TOP VIEW A1 A2 A c e FRONT VIEW b L SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 8L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. 21-0036 16 REV. J 1 1 ______________________________________________________________________________________ UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps 10LUMAX.EPS e 4X S 10 10 H O0.500.1 0.60.1 1 1 0.60.1 BOTTOM VIEW TOP VIEW D2 MILLIMETERS INCHES MAX DIM MIN A 0.043 A1 0.002 0.006 A2 0.030 0.037 D1 0.116 0.120 D2 0.114 0.118 0.120 E1 0.116 E2 0.114 0.118 H 0.187 0.199 L 0.0157 0.0275 L1 0.037 REF 0.0106 b 0.007 e 0.0197 BSC c 0.0035 0.0078 0.0196 REF S 0 6 MAX MIN 1.10 0.15 0.05 0.75 0.95 3.05 2.95 3.00 2.89 3.05 2.95 2.89 3.00 4.75 5.05 0.40 0.70 0.940 REF 0.270 0.177 0.500 BSC 0.200 0.090 0.498 REF 0 6 E2 GAGE PLANE A2 c A b A1 E1 D1 FRONT VIEW L L1 SIDE VIEW PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE, 10L uMAX/uSOP APPROVAL DOCUMENT CONTROL NO. REV. 1 I 1 9LUCSP, 3x3.EPS 21-0061 PACKAGE OUTLINE, 3x3 UCSP 21-0093 J 1 1 ______________________________________________________________________________________ 17 MAX4249-MAX4257 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.) 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.) DIM A A1 B C e E H L N E H INCHES MILLIMETERS MAX MIN 0.053 0.069 0.004 0.010 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 MAX4249-MAX4257 UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps 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 18 REV. B 1 1 ______________________________________________________________________________________ UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps 12L, USPC.EPS 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 ____________________ 19 (c) 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc. MAX4249-MAX4257 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.)