INA122
®
INA122
INA122
Single Supply, MicroPower
INSTRUMENTATION AMPLIFIER
APPLICATIONS
● PORTABLE, BATTERY OPERATED
FEATURES
● LOW QUIESCENT CURRENT: 60µA
SYSTEMS
● WIDE POWER SUPPLY RANGE
Single Supply: 2.2V to 36V
● INDUSTRIAL SENSOR AMPLIFIER:
Bridge, RTD, Thermocouple
Dual Supply: –0.9/+1.3V to ±18V
● PHYSIOLOGICAL AMPLIFIER:
● COMMON-MODE RANGE TO (V–)–0.1V
● RAIL-TO-RAIL OUTPUT SWING
ECG, EEG, EMG
● MULTI-CHANNEL DATA ACQUISITION
● LOW OFFSET VOLTAGE: 250µV max
● LOW OFFSET DRIFT: 3µV/°C max
● LOW NOISE: 60nV/√Hz
DESCRIPTION
● LOW INPUT BIAS CURRENT: 25nA max
● 8-PIN DIP AND SO-8 SURFACE-MOUNT
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).
V+
7
INA122
3
8
+
VIN
6
VO
+
–
V
O = (VIN – VIN) G
100kΩ
25kΩ
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.
200k
RG
G = 5 +
25kΩ
RG
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.
1
2
–
VIN
100kΩ
5
Ref
4
V–
International Airport Industrial Park
•
Mailing Address: PO Box 11400, Tucson, AZ 85734
FAXLine: (800) 548-6133 (US/Canada Only)
• Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/
•
•
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
SBOS069