MAX4194 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – Micropower, Single-Supply, Rail-to-Rail, Precision Instrumentation Amplifiers

19-1468; Rev 0; 4/99
Micropower, Single-Supply, Rail-to-Rail,
Precision Instrumentation Amplifiers
General Description
The MAX4194 is a variable-gain precision instrumenta-
tion amplifier that combines Rail-to-Rail^® single-supply
operation, outstanding precision specifications, and a
high gain bandwidth. This amplifier is also offered in
three fixed-gain versions: the MAX4195 (G = +1V/V),
the MAX4196 (G = +10V/V), and the MAX4197 (G =
+100V/V). The fixed-gain instrumentation amplifiers fea-
ture a shutdown function that reduces the quiescent
current to 8µA. A traditional three operational amplifier
configuration is used to achieve maximum DC preci-
sion.
The MAX4194–MAX4197 have rail-to-rail outputs and
inputs that can swing to within 200mV of the negative rail
and to within 1.1V of the positive rail. All parts draw only
93µA and operate from a single +2.7V to +7.5V supply
or from dual ±1.35V to ±3.75V supplies. These amplifiers
are offered in 8-pin SO packages and are specified for
the extended temperature range (-40°C to +85°C).
See the MAX4198/MAX4199 data sheet for single-sup-
ply, precision differential amplifiers.
Applications
Medical Equipment
Thermocouple Amplifier
4–20mA Loop Transmitters
Data-Acquisition Systems
Battery-Powered/Portable Equipment
Transducer Interface
Bridge Amplifier
Features
o +2.7V Single-Supply Operation
o Low Power Consumption
93µA Supply Current
8µA Shutdown Current (MAX4195/96/97)
o High Common-Mode Rejection: 115dB (G = +10V/V)
o Low 50µV Input Offset Voltage (G ≥ +100V/V)
o Low ±0.01% Gain Error (G = +1V/V)
o 250kHz -3dB Bandwidth (G = +1V/V, MAX4194)
o Rail-to-Rail Outputs
PART
MAX4194ESA
MAX4195ESA
MAX4196ESA
MAX4197ESA
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 SO
8 SO
8 SO
8 SO
Selector Guide
PART
MAX4194
MAX4195
MAX4196
MAX4197
SHUTDOWN
No
Yes
Yes
Yes
GAIN (V/V)
Variable
+1
+10
+100
CMRR (dB)
95 (G = +1V/V)
95
115
115
Pin Configurations
TOP VIEW
RG- 1
IN- 2
IN+ 3
V_EE 4
MAX4194
8 RG+
7 V_CC
6 OUT
5 REF
SO
REF 1
IN- 2
IN+ 3
V_EE 4
MAX4195
MAX4196
MAX4197
8 SHDN
7 V_CC
6 OUT
5 FB
SO
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
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