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
庐
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 8碌A. A traditional three operational amplifier
configuration is used to achieve maximum DC preci-
sion.
The MAX4194鈥揗AX4197 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
93碌A and operate from a single +2.7V to +7.5V supply
or from dual 卤1.35V to 卤3.75V supplies. These amplifiers
are offered in 8-pin SO packages and are specified for
the extended temperature range (-40掳C to +85掳C).
See the MAX4198/MAX4199 data sheet for single-sup-
ply, precision differential amplifiers.
o
+2.7V Single-Supply Operation
o
Low Power Consumption
93碌A Supply Current
8碌A Shutdown Current (MAX4195/96/97)
o
High Common-Mode Rejection: 115dB (G = +10V/V)
o
Low 50碌V Input Offset Voltage (G
鈮?/div>
+100V/V)
o
Low 卤0.01% Gain Error (G = +1V/V)
o
250kHz -3dB Bandwidth (G = +1V/V, MAX4194)
o
Rail-to-Rail Outputs
Features
MAX4194鈥揗AX4197
Ordering Information
PART
MAX4194ESA
MAX4195ESA
MAX4196ESA
MAX4197ESA
TEMP. RANGE
-40掳C to +85掳C
-40掳C to +85掳C
-40掳C to +85掳C
-40掳C to +85掳C
PIN-PACKAGE
8 SO
8 SO
8 SO
8 SO
Applications
Medical Equipment
Thermocouple Amplifier
4鈥?0mA Loop Transmitters
Data-Acquisition Systems
Battery-Powered/Portable Equipment
Transducer Interface
Bridge Amplifier
PART
MAX4194
MAX4195
MAX4196
MAX4197
SHUTDOWN
No
Yes
Yes
Yes
Selector Guide
GAIN (V/V)
Variable
+1
+10
+100
CMRR (dB)
95 (G = +1V/V)
95
115
115
Pin Configurations
TOP VIEW
RG-
1
IN-
2
8
7
RG+
V
CC
OUT
REF
REF
1
IN-
2
IN+
3
8
7
SHDN
V
CC
OUT
FB
MAX4194
IN+
3
6
5
V
EE
4
MAX4195
MAX4196
MAX4197
6
5
V
EE
4
SO
SO
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1
2
3
4
5
6
7
8
9
10
11
12
