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MAX4240EUK+N/AN/a2500avaiSingle/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op Amps
MAX4240EUK+T |MAX4240EUKTMAXIMN/a6000avaiSingle/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op Amps
MAX4241EUA+ |MAX4241EUAMAXIMN/a11avaiSingle/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op Amps
MAX4241EUA+T |MAX4241EUATMAXN/a4397avaiSingle/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op Amps
MAX4242ESA+ |MAX4242ESAMAXIMN/a95avaiSingle/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op Amps
MAX4242ESA+TMAXN/a2500avaiSingle/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op Amps
MAX4242EUA+ |MAX4242EUAMAXIMN/a3900avaiSingle/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op Amps
MAX4242EUA+TMAXIMN/a47269avaiSingle/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op Amps
MAX4242EUA-T |MAX4242EUATMAXIMN/a2840avaiSingle/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op Amps
MAX4244ESD+ |MAX4244ESDMAXIMN/a35avaiSingle/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op Amps


MAX4242EUA+T ,Single/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op AmpsFeaturesThe MAX4240–MAX4244 family of micropower op amps♦ Ultra-Low-Voltage Operation:operate from ..
MAX4242EUA-T ,Single/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op AmpsApplicationsMAX4242EUA -40°C to +85°C 8 µMAX —Two-Cell Battery- Strain GaugesMAX4242ESA -40°C to +8 ..
MAX4243ESD ,Single/Dual/Quad / !.8V/10A / SOT23 / Beyond-the-Rails Op AmpsMAX4240–MAX424419-1343; Rev 0; 3/98Single/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op Amps___ ..
MAX4243EUB ,Single/Dual/Quad / !.8V/10A / SOT23 / Beyond-the-Rails Op AmpsELECTRICAL CHARACTERISTICS — T = +25°CA(V = +1.8V to +5.5V, V = 0, V = 0, V = V / 2, R = 100kΩ tied ..
MAX4244ESD ,Single/Dual/Quad / !.8V/10A / SOT23 / Beyond-the-Rails Op AmpsMAX4240–MAX424419-1343; Rev 0; 3/98Single/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op Amps___ ..
MAX4244ESD+ ,Single/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op AmpsMAX4240–MAX424419-1343; Rev 3; 9/06Single/Dual/Quad, +1.8V/10µA, SOT23,Beyond-the-Rails Op Amps
MAX809TTRG , Very Low Supply Current 3−Pin Microprocessor Reset Monitors
MAX809TTRG , Very Low Supply Current 3−Pin Microprocessor Reset Monitors
MAX809ZD , 3-pin microprocessor resets
MAX810 ,3-Pin Microprocessor Reset CircuitsFeaturesThe MAX803/MAX809/MAX810 are microprocessor (µP) Precision Monitoring of +2.5V, +3V, +3.3V ..
MAX810L ,3-Pin Microprocessor Reset CircuitsGeneral Description ________
MAX810-L ,3-Pin Microprocessor Reset CircuitsFeaturesThe MAX803/MAX809/MAX810 are microprocessor (µP) Precision Monitoring of +2.5V, +3V, +3.3V ..


MAX4240EUK+-MAX4240EUK+T-MAX4241EUA+-MAX4241EUA+T-MAX4242ESA+-MAX4242ESA+T-MAX4242EUA+-MAX4242EUA+T-MAX4242EUA-T-MAX4244ESD+
Single/Dual/Quad, +1.8V/10µA, SOT23, Beyond-the-Rails Op Amps
General Description
The MAX4240–MAX4244 family of micropower op amps
operate from a single +1.8V to +5.5V supply or dual
±0.9V to ±2.75V supplies and have Beyond-the-Rails™
inputs and rail-to-rail output capabilities. These ampli-
fiers provide a 90kHz gain-bandwidth product while
using only 10µA of supply current per amplifier. The
MAX4241/MAX4243 have a low-power shutdown mode
that reduces supply current to less than 1µA and forces
the output into a high-impedance state. Although the
minimum operating voltage is specified at +1.8V, these
devices typically operate down to +1.5V. The combina-
tion of ultra-low-voltage operation, beyond-the-rails
inputs, rail-to-rail outputs, and ultra-low power con-
sumption makes these devices ideal for any portable/
two-cell battery-powered system.
These amplifiers have an input common-mode range
that extends 200mV beyond each rail, and their out-
puts typically swing to within 9mV of the rails with a
100kΩload. Beyond-the-rails input and rail-to-rail out-
put characteristics allow the full power-supply voltage
to be used for signal range. The combination of low
input offset voltage, low input bias current, and high
open-loop gain makes them suitable for low-power/low-
voltage precision applications.
The MAX4240 is offered in a space-saving 5-pin
SOT23 package. All specifications are guaranteed
over the -40°C to +85°C extended temperature range.
Applications
Features
Ultra-Low-Voltage Operation:
Guaranteed Down to +1.8V
Typical Operation to +1.5V
Ultra-Low Power Consumption:
10µA Supply Current per Amplifier
1µA Shutdown Mode (MAX4241/MAX4243)
Up to 200,000 Hours Operation from Two AA
Alkaline Cells
Beyond-the-Rails Input Common-Mode RangeOutputs Swing Rail-to-RailNo Phase Reversal for Overdriven Inputs200µV Input Offset VoltageUnity-Gain Stable for Capacitive Loads up to 200pF90kHz Gain-Bandwidth ProductAvailable in Space-Saving 5-Pin SOT23 and
8-Pin µMAX®Packages
MAX4240–MAX4244
Single/Dual/Quad, +1.8V/10µA, SOT23,
Beyond-the-Rails Op Amps

TOP VIEW
OUT 1 5 VCC
MAX4240 VEE 2
IN+ 3 4 IN-
SOT23-5
Pin Configurations
Ordering Information

19-1343; Rev 3; 9/06
Two-Cell Battery-
Powered Systems
Portable/Battery-Powered
Electronic Equipment
Digital Scales
Strain Gauges
Sensor Amplifiers
Cellular Phones
Notebook Computers
PDAs
PARTTEMP RANGEPIN-
PACKAGE
TOP
MARK
MAX4240EUK-T
-40°C to +85°C5 SOT23-5ACCS
MAX4241EUA
-40°C to +85°C8 µMAX—
MAX4241ESA-40°C to +85°C8 SO—
MAX4242EUA
-40°C to +85°C8 µMAX—
MAX4242ESA-40°C to +85°C8 SO—
MAX4243EUB
-40°C to +85°C10 µMAX—
MAX4243ESD-40°C to +85°C14 SO—
MAX4244ESD
-40°C to +85°C14 SO—
Selector Guide
PARTNO. OF
AMPSSHUTDOWNPIN-PACKAGE

MAX42401—5-pin SOT23
MAX42411Yes8-pin µMAX/SO
MAX42422—8-pin µMAX/SO
MAX42432Yes10-pin µMAX,
14-pin SO
MAX42444—14-pin SO
Beyond-the-Rails is a trademark and µMAX is a registered
trademark of Maxim Integrated Products, Inc.Pin Configurations continued at end of data sheet.
Single/Dual/Quad, +1.8V/10μA, SOT23, yond-the-Rails Op Amps
ABSOLUTE MAXIMUM RATINGS

Supply Voltage (VCC to VEE)....................................................6V 10-pin µMAX (derate 5.6mW/°C above +70°C)............444mW
All Other Pins ...................................(VCC + 0.3V) to (VEE - 0.3V) 14-pin SO (derate 8.33mW/°C above +70°C)...............667mW
Output Short-Circuit Duration (to VCC or VEE)............Continuous Operating Temperature Range ...........................-40°C to +85°C
Continuous Power Dissipation (TA = +70°C) Junction Temperature......................................................+150°C
5-pin SOT23 (derate 7.1mW/°C above +70°C).............571mW Storage Temperature Range .............................-65°C to +160°C
8-pin µMAX (derate 4.1mW/°C above +70°C) ..............330mW Lead Temperature (soldering, 10s) .................................+300°C
8-pin SO (derate 5.88mW/°C above +70°C).................471mW
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

(VCC = +1.8V to +5.5V, VEE = 0, VCM = 0, VOUT = VCC / 2, RL = 100kΩ tied to VCC / 2, SHDN = VCC, TA = +25°C, unless
otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply-Voltage Range VCC Inferred from PSRR test 1.8 5.5 V
Supply Current ICC SHDN = VCC VCC = 1.8V 10 12 µA per Amplifier VCC = 5.0V 14 18
Shutdown Supply SHDN = VEE VCC = 1.8V 1.0 1.5 µACurrent (Note 2) ICC(SHDN) VCC = 5.0V 2.0 3.0
MAX4241ESA ±0.20 ±0.75 Input Offset Voltage VOS (VEE - 0.2V) ≤ VCM ≤
(VCC + 0.2V)
MAX4242ESA/MAX4243ESD/
MAX4244ESD ±0.20 ±0.88
MAX4240EUK/MAX424_EUA/
MAX4243EUB ±0.25 ±1.40
Input Bias Current IB (Note 3) ±2 ±6 nA
Input Offset Current IOS (Note 3) ±0.5 ±1.5 nA
Differential Input œ VIN+ - VIN-œ < 1.0V 45 MΩ
Resistance RIN(DIFF) œ VIN+ - VIN-œ > 2.5V 4.4 kΩ
Input Common-Mode VCM Inferred from the CMRR test VEE - 0.2 VCC + 0.2 VVoltage Range
MAX4241ESA 72 90
dB
VCC = 1.8V MAX4242ESA/MAX4243ESD/
MAX4244ESD 69 90
Common-Mode
Rejection Ratio
(Note 4)
CMRR
MAX4240EUK/MAX424_EUA/
MAX4243EUB 63 88
VCC = 5.0V
MAX4241ESA 74 94
MAX4242ESA/MAX4243ESD/
MAX4244ESD 74 94
MAX4240EUK/MAX424_EUA/
MAX4243EUB 69 90
ingle/Dual/Quad, +1.8V/10μA, SOT23yond-the-Rails Op Amps ELECTRICAL CHARACTERISTICS (continued)
(VCC = +1.8V to +5.5V, VEE = 0, VCM = 0, VOUT = VCC / 2, RL = 100kΩ tied to VCC / 2, SHDN = VCC, TA = +25°C, unless
otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MAX4241ESA 77 85 Power-Supply
Rejection Ratio PSRR 1.8V ≤ VCC ≤ 5.5V
MAX4242ESA/MAX4243ESD/
MAX4244ESD 77 85
MAX4240EUK/MAX424_EUA/
MAX4243EUB 75 82
VCC = 1.8V RL = 100kΩ 76 85 Large-Signal AVOL (VEE + 0.2V) ≤ VOUT ≤ RL = 10kΩ 66 73
Voltage Gain (VCC - 0.2V)
VCC = 5.0V RL = 100kΩ 86 94
RL = 10kΩ 78 85
VCC = 1.8V RL = 100kΩ 8 20 Output Voltage VOH Specified as RL = 10kΩ 40 65
Swing High œ VCC - VOHœ
VCC = 5.0V RL = 100kΩ 10 25
RL = 10kΩ 60 95
VCC = 1.8V RL = 100kΩ 6 15 Output Voltage VOL Specified as RL = 10kΩ 23 35
Swing Low œ VEE - VOLœ
VCC = 5.0V RL = 100kΩ 10 20
RL = 10kΩ 40 60
Output Short-Circuit Sourcing 0.7 mACurrent IOUT(SC) Sinking 2.5
Output Leakage
Current in Shutdown IOUT(SHDN) SHDN = VEE = 0, VCC = 5.5V 20 50 nA
(Notes 2, 5)
SHDN Logic Low
(Note 2) VIL 0.3 x VCC V
SHDN Logic High
(Note 2) VIH 0.7 x VCC V
SHDN Input Bias
Current (Note 2) IIH, IIL SHDN = VCC = 5.5V or SHDN = VEE = 0 40 80 nA
Channel-to-Channel
Isolation (Note 6) CHISO Specified at DC 80 dB
Gain-Bandwidth
Product GBW 90 kHz
Phase Margin F m 68 degrees
Gain Margin Gm 18 dB
Slew Rate SR 40 V/ms
Single/Dual/Quad, +1.8V/10μA, SOT23, yond-the-Rails Op Amps
ELECTRICAL CHARACTERISTICS (continued)

(VCC = +1.8V to +5.5V, VEE = 0, VCM = 0, VOUT = VCC / 2, RL = 100kΩ tied to VCC / 2, SHDN = VCC, TA = +25°C, unless
otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Input Voltage-Noise
Density en f = 1kHz 70 nV/√Hz
Input Current-Noise
Density in f = 1kHz 0.05 pA/√Hz
Capacitive-Load
Stability AVCL = +1V/V, no sustained oscillations 200 pF
Shutdown Time tSHDN 50 µs
Enable Time from
Shutdown tENABLE 150 µs
Power-Up Time tON 200 µs
Input Capacitance CIN 3 pF
Total Harmonic
Distortion THD fIN = 1kHz, VCC = 5.0V, VOUT = 2Vp-p, AV = +1V/V 0.05 %
Settling Time to 0.01% tS AV = +1V/V, VCC = 5.0V, VOUT = 2VSTEP 50 µs
ELECTRICAL CHARACTERISTICS

(VCC = +1.8V to +5.5V, VEE = 0, VCM = 0, VOUT = VCC / 2, RL = 100kΩ tied to VCC / 2, SHDN = VCC, TA = TMIN to TMAX, unless oth-
erwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply-Voltage Range VCC Inferred from PSRR test 1.8 5.5 V
Supply Current ICC SHDN = VCC VCC = 1.8V 14 µAper Amplifier VCC = 5.0V 19
Shutdown Supply SHDN = VEE VCC = 1.8V 2.0 µACurrent (Note 2) ICC(SHDN) VCC = 5.0V 3.5
MAX4241ESA ±1.2 Input Offset Voltage VOS (VEE - 0.2V) ≤ VCM ≤
(VCC + 0.2V)
MAX4242ESA/MAX4243ESD/
MAX4244ESD ±1.3
MAX4240EUK/MAX424_EUA/
MAX4243EUB ±2.0
Input Offset Voltage
Drift TCVOS 2 µV/°C
Input Bias Current IB (Note 3) ±15 nA
Input Offset Current IOS (Note 3) ±7 nA
Input Common-Mode
Voltage Range VCM Inferred from the CMRR test -0.2 VCC + 0.2 V
ingle/Dual/Quad, +1.8V/10μA, SOT23yond-the-Rails Op Amps ELECTRICAL CHARACTERISTICS
(VCC = +1.8V to +5.5V, VEE = 0, VCM = 0, VOUT = VCC / 2, RL = 100kΩ tied to VCC / 2, SHDN = VCC, TA = TMIN to TMAX, unless oth-
erwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

MAX4241ESA 65
dB
VCC = 1.8V
MAX4242ESA/MAX4243ESD/
MAX4244ESD 65
Common-Mode
Rejection Ratio
(Note 4)
CMRR
MAX4240EUK/MAX424_EUA/
MAX4243EUB 61
VCC = 5.0V
MAX4241ESA 71
MAX4242ESA/MAX4243ESD/
MAX4244ESD 71
MAX4240EUK/MAX424_EUA/
MAX4243EUB 67
MAX4241ESA 73 Power-Supply
Rejection Ratio PSRR 1.8V ≤ VCC ≤ 5.5V
MAX4242ESA/MAX4243ESD/
MAX4244ESD 73
MAX4240EUK/MAX424_EUA/
MAX4243EUB 71
VCC = 1.8V RL = 100kΩ 72 Large-Signal AVOL (VEE + 0.2V) ≤ VOUT ≤ RL = 10kΩ 62
Voltage Gain (VCC - 0.2V)
VCC = 5.0V RL = 100kΩ 80
RL = 10kΩ 72
VCC = 1.8V RL = 100kΩ 25 Output Voltage VOH Specified as RL = 10kΩ 95
Swing High œ VCC - VOHœ
VCC = 5.0V RL = 100kΩ 30
RL = 10kΩ 145
VCC = 1.8V RL = 100kΩ 20 Output Voltage VOL Specified as RL = 10kΩ 50
Swing Low œ VEE - VOLœ
VCC = 5.0V RL = 100kΩ 25
RL = 10kΩ 75
Output Leakage
Current in Shutdown IOUT(SHDN) SHDN = VEE = 0, VCC = 5.5V 100 nA
(Notes 2, 5)
SHDN Logic Low
(Note 2) VIL 0.3 x VCC V
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