IN A
126
INA
212
6
INA
126
INA
212
INA126
INA2126
INA
212
6
6
SBOS062A – JANUARY 1996 – REVISED AUGUST 2005
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.
V+
INA2126
V+
IN
FEATURES
q
LOW QUIESCENT CURRENT: 175
µ
A/chan.
q
WIDE SUPPLY RANGE:
±
1.35V to
±
18V
q
LOW OFFSET VOLTAGE: 250
µ
V max
q
LOW OFFSET DRIFT: 3
µ
V/
°
C max
q
LOW NOISE: 35nV/√ Hz
q
LOW INPUT BIAS CURRENT: 25nA max
q
8-PIN DIP, SO-8, MSOP-8 SURFACE- MOUNT
DUAL: 16-Pin DIP, SO-16, SSOP-16
APPLICATIONS
q
INDUSTRIAL SENSOR AMPLIFIER:
Bridge, RTD, Thermocouple
q
PHYSIOLOGICAL AMPLIFIER:
ECG, EEG, EMG
q
MULTI-CHANNEL DATA ACQUISITION
q
PORTABLE, BATTERY OPERATED SYSTEMS
2
3
9
6
+
–
V
O
= (V
IN
– V
IN
) G
G=5+
80kΩ
R
G
V+
7
INA126
+
V
IN
3
6
8
40kΩ
10kΩ
R
G
10kΩ
1
+
–
V
O
= (V
IN
– V
IN
) G
G=5+
80kΩ
R
G
40kΩ
10kΩ
R
G
4
–
V
IN
1
40kΩ
15
10kΩ
7
5
11
+
V
IN
14
40kΩ
10kΩ
10
R
G
–
+
V
O
= (V
IN
– V
IN
) G
G=5+
80kΩ
R
G
V–
2
40kΩ
5
IN
13
–
V
IN
16
8
V–
10kΩ
4
V–
40kΩ
12
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
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
www.ti.com
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