®
INA
122
INA122
INA
122
Single Supply,
Micro
Power
INSTRUMENTATION AMPLIFIER
FEATURES
q
LOW QUIESCENT CURRENT: 60
µ
A
q
WIDE POWER SUPPLY RANGE
Single Supply: 2.2V to 36V
Dual Supply: –0.9/+1.3V to
±
18V
q
COMMON-MODE RANGE TO (V–)–0.1V
q
RAIL-TO-RAIL OUTPUT SWING
q
LOW OFFSET VOLTAGE: 250
µ
V max
q
LOW OFFSET DRIFT: 3
µ
V/
°
C max
q
LOW NOISE: 60nV/√ Hz
q
LOW INPUT BIAS CURRENT: 25nA max
q
8-PIN DIP AND SO-8 SURFACE-MOUNT
APPLICATIONS
q
PORTABLE, BATTERY OPERATED
SYSTEMS
q
INDUSTRIAL SENSOR AMPLIFIER:
Bridge, RTD, Thermocouple
q
PHYSIOLOGICAL AMPLIFIER:
ECG, EEG, EMG
q
MULTI-CHANNEL DATA ACQUISITION
DESCRIPTION
The INA122 is a precision instrumentation amplifier
for accurate, low noise differential signal acquisition.
Its two-op-amp design provides excellent performance
with very low quiescent current, and is ideal for
portable instrumentation and data acquisition systems.
The INA122 can be operated with single power sup-
plies from 2.2V to 36V and quiescent current is a mere
60µA. It can also be operated from dual supplies. By
utilizing an input level-shift network, input common-
mode range extends to 0.1V below negative rail (single
supply ground).
A single external resistor sets gain from 5V/V to
10000V/V. Laser trimming provides very low offset
voltage (250µV max), offset voltage drift (3µV/°C
max) and excellent common-mode rejection.
Package options include 8-pin plastic DIP and SO-8
surface-mount packages. Both are specified for the
–40°C to +85°C extended industrial temperature range.
V+
7
INA122
V+
3
6
8
100kΩ
25kΩ
R
G
25kΩ
V
O
+
–
V
O
= (V
IN
– V
IN
) G
G=5+
200k
R
G
IN
1
V–
IN
2
100kΩ
5
Ref
4
V–
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©
1997 Burr-Brown Corporation
PDS-1388B
Printed in U.S.A. October, 1997
BURR-BROWN [ BURR-BROWN CORPORATION ]
