Datasheet

FEATURES
● LOW QUIESCENT CURRENT: 175µA/chan.
● WIDE SUPPLY RANGE: ±1.35V to ±18V
● LOW OFFSET VOLTAGE: 250µV max
● LOW OFFSET DRIFT: 3µV/°C max
● LOW NOISE: 35nV/√Hz
● LOW INPUT BIAS CURRENT: 25nA max
● 8-PIN DIP, SO-8, MSOP-8 SURFACE- MOUNT
DUAL: 16-Pin DIP, SO-16, SSOP-16
Micro POWER INSTRUMENTATION AMPLIFIER
Single and Dual Versions
DESCRIPTION
The INA126 and INA2126 are precision instrumentation ampli-
fiers for accurate, low noise differential signal acquisition. Their
two-op-amp design provides excellent performance with very
low quiescent current (175µA/channel). This, combined with a
wide operating voltage range of ±1.35V to ±18V, makes them
ideal for portable instrumentation and data acquisition sys-
tems.
Gain can be set from 5V/V to 10000V/V with a single
external resistor. Laser trimmed input circuitry provides low
offset voltage (250µV max), low offset voltage drift (3µV/°C
max) and excellent common-mode rejection.
Single version package options include 8-pin plastic DIP,
SO-8 surface mount, and fine-pitch MSOP-8 surface-mount.
Dual version is available in the space-saving SSOP-16 fine-
pitch surface mount, SO-16, and 16-pin DIP. All are specified
for the –40°C to +85°C industrial temperature range.
APPLICATIONS
● INDUSTRIAL SENSOR AMPLIFIER:
Bridge, RTD, Thermocouple
● PHYSIOLOGICAL AMPLIFIER:
ECG, EEG, EMG
● MULTI-CHANNEL DATA ACQUISITION
● PORTABLE, BATTERY OPERATED SYSTEMS
IN
A
1
2
6
I
N
A
2
1
2
6
INA2126
INA126
INA2126
INA126
INA2126
SBOS062A – JANUARY 1996 – REVISED AUGUST 2005
www.ti.com
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 1996-2005, Texas Instruments Incorporated
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
40kΩ
10kΩ
10kΩ
40kΩ
INA126
5
4
2
1
8
3
7
6
R
G
V
IN
–
V
IN
+
V+
V–
V
O
= (V
IN
– V
IN
) G
–+
80kΩ
R
G
G = 5 +
40kΩ
10kΩ
10kΩ
40kΩ
INA2126
5
7
8
1
4
3
2
9
6
R
G
V
IN
–
V
IN
+
V+
V–
V
O
= (V
IN
– V
IN
) G
–
+
G = 5 +
V
O
= (V
IN
– V
IN
) G
–
+
G = 5 +
40kΩ
10kΩ
10kΩ
40kΩ
12
16
13
14
15
11
10
R
G
V
IN
–
V
IN
+
80kΩ
R
G
80kΩ
R
G