INA326
INA327
I
N
A
I
N
A
3
2
6
3
2
7
SBOS222 – DECEMBER 2001
Precision, Rail-to-Rail I/O
INSTRUMENTATION AMPLIFIER
FEATURES
DESCRIPTION
The INA326 is a high-performance, low-cost, precision in-
strumentation amplifier with rail-to-rail input and output. It is
a true single-supply instrumentation amplifier with very-low
DC errors and input common-mode range that extends
beyond the positive and negative rails. These features make
them suitable for applications ranging from general-purpose
to high-accuracy.
● PRECISION
LOW OFFSET: 125µV (max)
LOW OFFSET DRIFT: 1µV/°C (max)
EXCELLENT LONG-TERM STABILITY
VERY-LOW 1/f NOISE
● TRUE RAIL-TO-RAIL I/O
Excellent long-term stability and very low 1/f noise assure low
offset voltage and drift throughout the life of the product.
INPUT COMMON-MODE RANGE: 20mV
Beyond Rails
The INA326 is specified over the extended industrial tem-
perature range, –40°C to +85°C, with operation from
–40°C to +125°C.
WIDE OUTPUT SWING: Within 10mV of Rails
SUPPLY RANGE: Single +2.7V to +5.5V
● SMALL SIZE
The INA327, with shutdown and synchronization, will be
available Q1 2002.
microPACKAGE: MSOP-8
● LOW COST
INA326 AND INA327 RELATED PRODUCTS
PRODUCT FEATURES
APPLICATIONS
● LOW-LEVEL TRANSDUCER AMPLIFIER FOR
INA114
INA118
INA122
50µV VOS, 0.5nA IB, 115dB CMR, 3mA IQ, 0.25µV/°C drift
50µV VOS, 1nA IB, 120dB CMR, 385µA IQ, 0.5µV/°C drift
250µV VOS, –10nA IB, 85µA IQ, Rail-to-Rail Output, 3µV/°C drift
BRIDGES, LOAD CELLS, THERMOCOUPLES
INA128
INA321
50µV VOS, 2nA IB, 125dB CMR, 750µA IQ, 0.5µV/°C drift
500µV VOS, 0.5pA IB, 94dB CMRR, 60µA IQ, Rail-to-Rail Output
● WIDE DYNAMIC RANGE SENSOR
MEASUREMENTS
● HIGH-RESOLUTION TEST SYSTEMS
● WEIGH SCALES
● MULTI-CHANNEL DATA ACQUISITION
V+
V–
SYSTEMS
7
2
1
VIN–
● MEDICAL INSTRUMENTATION
● GENERAL-PURPOSE
4
6
VO
R1
INA326
8
3
5
G = 2(R2/R1)
VIN+
R2
C2
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.
PRODUCTION DATA information is current as of publication date.
Copyright © 2001, Texas Instruments Incorporated
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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