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MAX4245AXTMAXIMN/a2500avaiUltra-Small, Rail-to-Rail I/O with Disable, Single/Dual-Supply, Low-Power Op Amps
MAX4246AKA+TMAXIMN/a7500avaiUltra-Small, Rail-to-Rail I/O with Disable, Single/Dual-Supply, Low-Power Op Amps


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MAX4245AXT-MAX4246AKA+T
Ultra-Small, Rail-to-Rail I/O with Disable, Single/Dual-Supply, Low-Power Op Amps
General Description
The MAX4245/MAX4246/MAX4247 family of low-cost op
amps offer rail-to-rail inputs and outputs, draw only 320µA
of quiescent current, and operate from a single +2.5V
to +5.5V supply. For additional power conservation, the
MAX4245/MAX4247 offer a low-power shutdown mode
that reduces supply current to 50nA, and puts the ampli-
fiers outputs in a high-impedance state. These devices
are unity-gain stable with a 1MHz gain-bandwidth prod
uct driving capacitive loads up to 470pF.
The MAX4245/MAX4246/MAX4247 family is specified
from -40°C to +125°C, making them suitable for use in
a variety of harsh environments. The MAX4245 single
amplifier is available in ultra-small 6-pin SC70 and space-
saving 6-pin SOT23 packages. The MAX4246 dual
amplifier is available in 8-pin SOT23, SO, and µMAX®
packages. The MAX4247 dual amplifier comes in a tiny
10-pin µMAX package.
Applications●Portable Communications●Single-Supply Zero-Crossing Detectors●Instruments and Terminals●Electronic Ignition Modules●Infrared Receivers●Sensor-Signal Detection
Features●Rail-to-Rail Input and Output Voltage Swing●50nA (max) Shutdown Mode (MAX4245/MAX4247)●320µA (typ) Quiescent Current Per Amplifier●Single +2.5V to +5.5V Supply Voltage Range●110dB Open-Loop Gain with 2kΩ Load●0.01% THD with 100kΩ Load●Unity-Gain Stable up to CLOAD = 470pF●No Phase Inversion for Overdriven Inputs●Available in Space-Saving Packages 6-Pin SC70 or 6-Pin SOT23 (MAX4245) 8-Pin SOT23/SO or 8-Pin µMAX (MAX4246) 10-Pin µMAX (MAX4247)
Pin Configurations continued at end of datat sheet.
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
μMAX is a registered trademark of Maxim Integrated Products, Inc.
PARTTEMP RANGEPIN-
PACKAGE
TOP
MARK
MAX4245AXT+T-40°C to +125°C6 SC70AAZ
MAX4245AUT+T-40°C to +125°C6 SOT23AAUB
MAX4246AKA+T-40°C to +125°C8 SOT23AAIN
MAX4246ASA+T-40°C to +125°C8 SO—
MAX4246AUA+T-40°C to +125°C8 µMAX—
MAX4247AUB+T-40°C to +125°C10 µMAX—
PARTAMPLIFIERS
PER PACKAGE
SHUTDOWN
MODE
MAX4245AXT1Yes
MAX4245AUT1Yes
MAX4246AKA2No
MAX4246ASA2No
MAX4246AUA2No
MAX4247AUB2Yes
VSS
OUTIN-6VDD
IN+MAX4245
SC70-6/SOT23-6
TOP VIEW4
VDD
OUTB
INB-
INB+VSS
INA+
INA-
OUTA
MAX4246
SOT23-8/µMAX-8
SHDN+
MAX4245/MAX4246/
MAX4247
Ultra-Small, Rail-to-Rail I/O with Disable,
Single-/Dual-Supply, Low-Power Op Amps
Ordering Information
Selector Guide
Pin Conigurations
Power-Supply Voltage (VDD to VSS) .......................-0.3V to +6V
All Other Pins ................................(VSS - 0.3V) to (VDD + 0.3V)
Output Short-Circuit Duration
(OUT shorted to VSS or VDD) .............................. Continuous
Continuous Power Dissipation (TA = +70°C)
6-Pin SC70 (derate 3.1mW/°C above +70°C) .............245mW
6-Pin SOT23 (derate 8.7mW/°C above +70°C) ..........695mW
8-Pin SO (derate 5.9mW/°C above +70°C) .................471mW
8-Pin SOT23 (derate 9.1mW/°C above +70°C) ..........727mW
8-Pin µMAX (derate 4.5mW/°C above +70°C) ............362mW
10-Pin µMAX (derate 5.6mW/°C above +70°C) ..........444mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range ............................-65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
(VDD = +2.7V, VSS = 0V, VCM = 0V, VOUT = VDD/2, RL connected from OUT to VDD/2, SHDN_ = VDD (MAX4245/MAX4247 only),
TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Supply Voltage RangeVDDInferred from PSRR test2.55.5V
Supply Current (Per Ampliier)IDDVDD = +2.7V320650µAVDD = +5.5V375700
Supply Current in ShutdownISHDN_SHDN_ = VSS (Note 2)0.050.5µA
Input Offset VoltageVOSVSS - 0.1V ≤ VCM ≤ VDD + 0.1V±0.4±1.5mV
Input Bias Current IBVSS - 0.1V ≤ VCM ≤ VDD + 0.1V±10±50nA
Input Offset Current IOSVSS - 0.1V ≤ VCM ≤ VDD + 0.1V±1±6nA
Input ResistanceRIN|VIN+ - VIN-| ≤ 10mV4000kΩ
Input Common-Mode Voltage
RangeVCMInferred from CMRR testVSS - 0.1VDD + 0.1V
Common-Mode Rejection RatioCMRRVSS - 0.1V ≤ VCM ≤ VDD + 0.1V6580dB
Power-Supply Rejection RatioPSRR2.5V ≤ VDD ≤ 5.5V7590dB
Large-Signal Voltage GainAV
VSS + 0.05V ≤ VOUT ≤ VDD - 0.05V,
RL = 100kΩ120
VSS + 0.2V ≤ VOUT ≤ VDD - 0.2V,
RL = 2kΩ95110
Output Voltage Swing HighVOHSpeciied as
VDD - VOUT
RL = 100kΩ1mVRL = 2kΩ3560
Output Voltage Swing LowVOLSpeciied as
VOUT - VSS
RL = 100kΩ1mVRL = 2kΩ3060
Output Short-Circuit CurrentIOUT(SC)VDD = +5.0VSourcing11mASinking30
Output Leakage Current in
ShutdownIOUT(SH)
Device in Shutdown Mode
(SHDN_ = VSS), VSS ≤ VOUT ≤ VDD
(Note 2)
±0.01±0.5µA
SHDN_ Logic LowVIL(Note 2)0.3 x VDDV
SHDN_ Logic HighVIH(Note 2)0.7 x VDDV
MAX4245/MAX4246/
MAX4247
Ultra-Small, Rail-to-Rail I/O with Disable,
Single-/Dual-Supply, Low-Power Op Amps
Absolute Maximum Ratings
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 = +2.7V, VSS = 0V, VCM = 0V, VOUT = VDD/2, RL connected from OUT to VDD/2, SHDN_ = VDD (MAX4245/MAX4247 only),
TA = -40°C to +125°C, unless otherwise noted.) (Note 1)
(VDD = +2.7V, VSS = 0V, VCM = 0V, VOUT = VDD/2, RL connected from OUT to VDD/2, SHDN_ = VDD (MAX4245/MAX4247 only),
TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Supply Voltage RangeVDDInferred from PSRR test2.55.5V
Supply Current (Per Ampliier)IDDVDD = +2.7V800µA
Supply Current in ShutdownISHDN_SHDN_ = VSS (Note 2)1µA
Input Offset VoltageVOSVSS ≤ VCM ≤ VDD (Note 4)±3.0mV
Input Offset Voltage DriftTCVOSVSS ≤ VCM ≤ VDD (Note 4)±2µV/°C
Input Bias Current IBVSS ≤ VCM ≤ VDD (Note 4)±100nA
Input Offset Current IOSVSS ≤ VCM ≤ VDD (Note 4)±10nA
Input Common-Mode
Voltage RangeVCMInferred from CMRR test (Note 4)VSSVDDV
Common-Mode Rejection RatioCMRRVSS ≤ VCM ≤ VDD (Note 4)60dB
Power-Supply Rejection RatioPSRR2.5V ≤ VDD ≤ 5.5V70dB
Large-Signal Voltage GainAVVSS + 0.2V ≤ VOUT ≤ VDD - 0.2V,
RL = 2kΩ85dB
Output Voltage Swing HighVOHSpeciied as VDD - VOUT, RL = 2kΩ90mV
Output Voltage Swing LowVOLSpeciied as VOUT - VSS, RL = 2kΩ90mV
Output Leakage Current in
Shutdown
IOUT
(SH)
Device in Shutdown Mode (SHDN_ = VSS),
VSS ≤ VOUT ≤ VDD (Note 3)±1.0µA
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Gain-Bandwidth ProductGBW1.0MHz
Phase MarginΦM70degrees
Gain MarginGM20dB
Slew RateSR0.4V/µs
Input Voltage-Noise Densityenf = 10kHz52nV/√Hz
Input Current-Noise Densityinf = 10kHz0.1pA/√Hz
Capacitive-Load StabilityCLOADAV = 1 (Note 3)470pF
Shutdown Delay Timet(SH)(Note 2)3µs
Enable Delay Timet(EN)(Note 2)4µs
Power-On TimetON4µs
Input CapacitanceCIN2.5pF
Total Harmonic DistortionTHDf = 10kHz, VOUT = 2VP-P, AV = +1,
VDD = +5.0V, Load = 100kΩ to VDD/20.01%
Settling Time to 0.01%tSVOUT = 4V step, VDD = +5.0V, AV = +110µs
MAX4245/MAX4246/
MAX4247
Ultra-Small, Rail-to-Rail I/O with Disable,
Single-/Dual-Supply, Low-Power Op Amps
Electrical Characteristics
Electrical Characteristics (continued)
(VDD = +2.7V, VSS = 0V, VCM = 0V, VOUT = VDD/2, RL connected from OUT to VDD/2, SHDN_ = VDD (MAX4245/MAX4247 only),
TA = +25°C, unless otherwise noted.) (Note 1)
Note 1: Specifications are 100% tested at TA = +25°C. All temperature limits are guaranteed by design.
Note 2: Shutdown mode is only available in MAX4245 and MAX4247.
Note 3: Guaranteed by design, not production tested.
Note 4: For -40°C to +85°C, Input Common-Mode Range is VSS - 0.1V ≤ VCM ≤ VDD + 0.1V.
(VDD = 2.7V, VSS = VCM = 0V, VOUT = VDD/2, no load, TA = +25°C, unless otherwise noted.)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
SHDN_ Logic LowVIL(Note 2)0.3 x VDDV
SHDN_ Logic HighVIH(Note 2)0.7 x VDDV
SHDN_ Input CurrentIL/IHVSS ≤ SHDN_ ≤ VDD (Notes 2, 3)100nA
MAX4245/MAX4247
SHUTDOWN SUPPLY CURRENT
PER AMPLIFIER vs. TEMPERATURE
MAX4245 toc02
TEMPERATURE (°C)
ISHDN
(nA)
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
MAX4245 toc05
TEMPERATURE (°C)
(µV)
VDD = 5.5V
VDD = 2.5V
INPUT OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
MAX4245 toc03
VCM (V)
(µV)
VDD = 2.5VTA = +125°C
TA = +85°C
TA = +25°C
TA = -40°C
INPUT BIAS CURRENT
vs. COMMON-MODE VOLTAGE
MAX4245 toc06
VCM (V)
IBIAS
(nA)
TA = -40°C
TA = +25°C
TA = +125°C
VDD = 5.5V
TA = +85°C
SUPPLY CURRENT PER AMPLIFIER
vs. SUPPLY VOLTAGE
MAX4245 toc01
VDD (V)
IDD
(µA)
TA = +125°C
TA = +85°C
TA = +25°C
TA = -40°C
INPUT OFFSET VOLTAGE
vs. COMMON-MODE VOLTAGE
MAX4245 toc04
VCM (V)
(mV)
VDD = 5.5V
TA = -40°C
TA = +25°C
TA = +85°C
TA = +125°C
MAX4245/MAX4246/
MAX4247
Ultra-Small, Rail-to-Rail I/O with Disable,
Single-/Dual-Supply, Low-Power Op Amps
Electrical Characteristics (continued)
Typical Operating Characteristics
(VDD = 2.7V, VSS = VCM = 0V, VOUT = VDD/2, no load, TA = +25°C, unless otherwise noted.)1.01.50.52.02.53.03.54.04.55.05.5
OUTPUT SINK CURRENT
vs. OUTPUT VOLTAGE
MAX4245 toc08
VOUT (V)
ISINK
(mA)
VDD = 2.5V
VDD = 5.5V
OUTPUT SWING HIGH
vs. TEMPERATURE
MAX4245 toc09
TEMPERATURE (°C)
- V
OUT
(mV)
RL = 2kΩ
RL = 100kΩ
OUTPUT SWING LOW
vs. TEMPERATURE
MAX4245 toc10
TEMPERATURE (°C)
OUT
- V
(mV)
RL = 2kΩ
RL = 100kΩ
0.0011010000.10.01110010,000
CROSSTALK vs. FREQUENCY
MAX4245 toc11
FREQUENCY (kHz)
CROSSTALK (dB)
0.11010100100010,000
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX4245 toc12
FREQUENCY (kHz)
PSRR (dB)-60
1001000100,000
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. INPUT FREQUENCY
MAX4245 toc13
THD + N (%)
10,000
RL = 100kΩ
AV = +1
VOUT = 2VP-P
VDD = 5.0V1.01.52.00.52.53.03.54.04.55.05.5
OUTPUT SOURCE CURRENT
vs. OUTPUT VOLTAGE
MAX4245 toc07
VOUT (V)
ISOURCE
(mA)
VDD = 5.5V
VDD = 2.5V12345
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. AMPLITUDE
MAX4245 toc14
THD + N (%)
RL = 100kΩ
AV = +1
fIN = 1kHz
VDD = 5.0V
0.1110100100010,000
GAIN AND PHASE vs. FREQUENCY
MAX4245 toc15
GAIN (dB)
PHASE (deg)
PHASE
GAIN
NO LOAD
MAX4245/MAX4246/
MAX4247
Ultra-Small, Rail-to-Rail I/O with Disable,
Single-/Dual-Supply, Low-Power Op Amps
Typical Operating Characteristics
(VDD = 2.7V, VSS = VCM = 0V, VOUT = VDD/2, no load, TA = +25°C, unless otherwise noted.)
0.1110100100010,000
GAIN AND PHASE vs. FREQUENCY
MAX4245 toc16
FREQUENCY (kHz)
GAIN (dB)
PHASE (deg)
PHASE
GAIN
2kΩ || 470pF
4µs/div
SMALL-SIGNAL TRANSIENT
RESPONSE (NONINVERTING)
OUT
20mV/div
20mV/div
MAX4245 toc17
4µs/div
SMALL-SIGNAL TRANSIENT
RESPONSE (INVERTING)
OUT
20mV/div
20mV/div
MAX4245 toc18
40µs/div
LARGE-SIGNAL TRANSIENT
RESPONSE (NONINVERTING)
OUT
2V/div
2V/div
MAX4245 toc19
VDD = 5V
40µs/div
LARGE-SIGNAL TRANSIENT
RESPONSE (INVERTING)
OUT
2V/div
2V/div
MAX4245 toc20
VDD = 5V
MAX4245/MAX4246/
MAX4247
Ultra-Small, Rail-to-Rail I/O with Disable,
Single-/Dual-Supply, Low-Power Op Amps
Typical Operating Characteristics (continued)
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