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MAX951ESA+-MAX951ESA+T-MAX951EUA+-MAX952EUA+-MAX953ESA+-MAX954ESA+-MAX954EUA+
Ultra-Low-Power, Single-Supply Op Amp + Comparator + Reference
General DescriptionThe MAX951–MAX954 feature combinations of a
micropower operational amplifier, comparator, and ref-
erence in an 8-pin package. In the MAX951 and
MAX952, the comparator’s inverting input is connected
to an internal 1.2V ±2% bandgap reference. The
MAX953 and MAX954 are offered without an internal
reference. The MAX951/MAX952 operate from a single
2.7V to 7V supply with a typical supply current of 7µA,
while the MAX953/MAX954 operate from 2.4V to 7V with
a 5µA typical supply current. Both the op amp and
comparator feature a common-mode input voltage
range that extends from the negative supply rail to with-
in 1.6V of the positive rail, as well as output stages that
swing Rail-to-Rail®.
The op amps in the MAX951/MAX953 are internally
compensated to be unity-gain stable, while the op
amps in the MAX952/MAX954 feature 125kHz typical
bandwidth, 66V/ms slew rate, and stability for gains of
10V/V or greater. These op amps have a unique output
stage that enables them to operate with an ultra-low
supply current while maintaining linearity under loaded
conditions. In addition, they have been designed to
exhibit good DC characteristics over their entire operat-
ing temperature range, minimizing input-referred errors.
The comparator output stage of these devices continu-
ously sources as much as 40mA. The comparators
eliminate power-supply glitches that commonly occur
when changing logic states, minimizing parasitic feed-
back and making the devices easier to use. In addition,
they contain ±3mV internal hysteresis to ensure clean
output switching, even with slow-moving input signals.
ApplicationsInstruments, Terminals, and Bar-Code Readers
Battery-Powered Systems
Automotive Keyless Entry
Low-Frequency, Local-Area Alarms/Detectors
Photodiode Preamps
Smart Cards
Infrared Receivers for Remote Controls
Smoke Detectors and Safety Sensors
FeaturesOp Amp + Comparator + Reference in an 8-Pin
µMAX Package (MAX951/MAX952)7µA Typical Supply Current
(Op Amp + Comparator + Reference)Comparator and Op Amp Input Range Includes
GroundOutputs Swing Rail-to-Rail2.4V to 7V Supply Voltage RangeUnity-Gain Stable and 125kHz Decompensated≥
10V/V Op Amp OptionsInternal 1.2V ±2% Bandgap ReferenceInternal Comparator HysteresisOp Amp Capable of Driving up to 1000pF Load
MAX951–MAX954
Ultra-Low-Power, Single-Supply
Op Amp + Comparator + Reference
Pin Configuration19-0431; Rev 2; 8/01
Selector GuideRail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
MAX951–MAX954
Ultra-Low-Power, Single-Supply
Op Amp + Comparator + Reference
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VDD= 2.8V to 7V for MAX951/MAX952, VDD= 2.4V to 7V for MAX953/MAX954, VSS= 0, VCM COMP= 0 for the MAX953/MAX954,
VCM OPAMP= 0, AMPOUT = (VDD+ VSS)/2, COMPOUT = low, TA= TMINto TMAX, typical values are at TA= +25°C, unless
otherwise noted.)
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.
Supply Voltage (VDDto VSS)....................................................9V
Inputs
Current (AMPIN_, COMPIN_)..........................................20mA
Voltage (AMPIN_, COMPIN_).......(VDD+ 0.3V) to (VSS- 0.3V)
Outputs
Current (AMPOUT, COMPOUT)......................................50mA
Current (REF)..................................................................20mA
Voltage (AMPOUT, COMPOUT,
REF)...................................(VDD+ 0.3V) to (VSS- 0.3V)
Short-Circuit Duration (REF, AMPOUT)..................Continuous
Short-Circuit Duration (COMPOUT, VDDto VSS≤7V)......1min
Continuous Power Dissipation (TA= +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)...727mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
8-Pin µMAX (derate 4.10mW/°C above +70°C)...........330mW
8-Pin CERDIP (derate 8.00mW/°C above +70°C)........640mW
Operating Temperature Ranges
MAX95_E_A.....................................................-40°C to +85°C
MAX95_MJA..................................................-55°C to +125°C
Maximum Junction Temperatures
MAX95_E_A.................................................................+150°C
MAX95_MJA.................................................................+175°C
Storage Temperature Range.............................-65°C to +165°C
Lead Temperature (soldering, 10s).................................+300°C
MAX951–MAX954
Ultra-Low-Power, Single-Supply
Op Amp + Comparator + Reference
ELECTRICAL CHARACTERISTICS (continued)(VDD= 2.8V to 7V for MAX951/MAX952, VDD= 2.4V to 7V for MAX953/MAX954, VSS= 0, VCM COMP= 0 for the MAX953/MAX954,
VCM OPAMP= 0, AMPOUT = (VDD+ VSS)/2, COMPOUT = low, TA= TMINto TMAX, typical values are at TA= +25°C, unless
otherwise noted.)
MAX951–MAX954
Ultra-Low-Power, Single-Supply
Op Amp + Comparator + Reference
ELECTRICAL CHARACTERISTICS (continued)(VDD= 2.8V to 7V for MAX951/MAX952, VDD= 2.4V to 7V for MAX953/MAX954, VSS= 0, VCM COMP= 0 for the MAX953/MAX954,
VCM OPAMP= 0, AMPOUT = (VDD+ VSS)/2, COMPOUT = low, TA= TMINto TMAX, typical values are at TA= +25°C, unless
otherwise noted.)
Note 1:Supply current is tested with COMPIN+ = (REF - 100mV) for MAX951/MAX952, and COMPIN+ = 0 for MAX953/MAX954.
Note 2:Input Offset Voltage is defined as the center of the input-referred hysteresis. VCM COMP= REF for MAX951/MAX952, and
VCM COMP= 0 for MAX953/MAX954.
Note 3:Trip Point is defined as the differential input voltage required to make the comparator output change. The difference
between upper and lower trip points is equal to the width of the input-referred hysteresis. VCM COMP= REF for
MAX951/MAX952, and VCM COMP= 0 for MAX953/MAX954.
Note 4:For MAX951/MAX952, input leakage current is measured for COMPIN- at the reference voltage. For MAX953/MAX954, input
leakage current is measured for both COMPIN+ and COMPIN- at VSS.
Note 5:Reference voltage is measured with respect to VSS. Contact factory for availability of a 3% accurate reference voltage in the
µMAX package.
MAX951–MAX954
Ultra-Low-Power, Single-Supply
Op Amp + Comparator + Reference
Typical Operating Characteristics(TA = +25°C, unless otherwise noted.)
COMPARATOR SHORT-CIRCUIT
CURRENT vs. SUPPLY VOLTAGE MAX951-954 TOC14
SHORT-CIRCUIT CURRENT (mA)
SUPPLY VOLTAGE (V)
MAX951–MAX954
Ultra-Low-Power, Single-Supply
Op Amp + Comparator + Reference
Typical Operating Characteristics (continued)
(TA = +25°C, unless otherwise noted.)
