MAX951 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Ultra-Low-Power, Single-Supply Op Amp Comparator Reference

19-0431; Rev 1; 7/97
Ultra-Low-Power, Single-Supply
Op Amp + Comparator + Reference
_______________General Description
The 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.
____________________Selection Table
PART
INTERNAL
2%
PRECISION
REFERENCE
OP-AMP
GAIN
STABILITY
(V/V)
SUPPLY
COMPARATOR CURRENT
(µA)
MAX951
Yes
1
Yes
7
MAX952
Yes
10
Yes
7
MAX953
No
1
Yes
5
MAX954
No
10
Yes
5
____________________________Features
o Op Amp + Comparator + Reference in an 8-Pin
µMAX Package (MAX951/MAX952)
o 7µA Typical Supply Current
(Op Amp + Comparator + Reference)
o Comparator and Op-Amp Input Range Includes
Ground
o Outputs Swing Rail to Rail
o +2.4V to +7V Supply Voltage Range
o Unity-Gain Stable and 125kHz Decompensated
A_V ≥ 10V/V Op-Amp Options
o Internal 1.2V ±2% Bandgap Reference
o Internal Comparator Hysteresis
o Op Amp Capable of Driving up to 1000pF Load
________________________Applications
Instruments, 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
__________________Pin Configuration
TOP VIEW
AMPOUT 1
AMPIN- ²
AMPIN+ ³
V_SS ⁴
MAX951
MAX952
MAX953
MAX954
8 _VDD
7 COMPOUT
6 REF (COMPIN-)
5 _COMPIN+
DIP/SO/µMAX
Typical Operating Circuit and Ordering Information
appear at end of data sheet.
( ) ARE FOR MAX953/MAX954
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