INA326 Datasheet, PDF (1/21 Pages) Texas Instruments – Precision, Rail-to-Rail I/O INSTRUMENTATION AMPLIFIER

INA326
INA327
INA326
INA327
SBOS222D – NOVEMBER 2001 – REVISED NOVEMBER 2004
Precision, Rail-to-Rail I/O
INSTRUMENTATION AMPLIFIER
FEATURES
q PRECISION
LOW OFFSET: 100µV (max)
LOW OFFSET DRIFT: 0.4µV/°C (max)
EXCELLENT LONG-TERM STABILITY
VERY-LOW 1/f NOISE
q TRUE RAIL-TO-RAIL I/O
INPUT COMMON-MODE RANGE:
20mV Below Negative Rail to 100mV Above
Positive Rail
WIDE OUTPUT SWING: Within 10mV of Rails
SUPPLY RANGE: Single +2.7V to +5.5V
q SMALL SIZE
microPACKAGE: MSOP-8, MSOP-10
q LOW COST
APPLICATIONS
q LOW-LEVEL TRANSDUCER AMPLIFIER FOR
BRIDGES, LOAD CELLS, THERMOCOUPLES
q WIDE DYNAMIC RANGE SENSOR
MEASUREMENTS
q HIGH-RESOLUTION TEST SYSTEMS
q WEIGH SCALES
q MULTI-CHANNEL DATA ACQUISITION
SYSTEMS
q MEDICAL INSTRUMENTATION
q GENERAL-PURPOSE
DESCRIPTION
The INA326 and INA327 (with shutdown) are high-perfor-
mance, low-cost, precision instrumentation amplifiers with
rail-to-rail input and output. They are true single-supply
instrumentation amplifiers with very low DC errors and input
common-mode ranges that extends beyond the positive and
negative rails. These features make them suitable for appli-
cations ranging from general-purpose to high-accuracy.
Excellent long-term stability and very low 1/f noise assure
low offset voltage and drift throughout the life of the product.
The INA326 (without shutdown) comes in the MSOP-8 pack-
age. The INA327 (with shutdown) is offered in an MSOP-10.
Both are specified over the industrial temperature range,
–40°C to +85°C, with operation from –40°C to +125°C.
INA326 AND INA327 RELATED PRODUCTS
PRODUCT FEATURES
INA337
INA114
INA118
INA122
INA128
INA321
Precision, 0.4µV/°C Drift, Specified –40°C to +125°C
50µV V_OS, 0.5nA I_B, 115dB CMR, 3mA I_Q, 0.25µV/°C Drift
50µV V_OS, 1nA I_B, 120dB CMR, 385µA I_Q, 0.5µV/°C Drift
250µV V_OS, –10nA I_B, 85µA I_Q, Rail-to-Rail Output, 3µV/°C Drift
50µV V_OS, 2nA I_B, 125dB CMR, 750µA I_Q, 0.5µV/°C Drift
500µV V_OS, 0.5pA I_B, 94dB CMRR, 60µA I_Q, Rail-to-Rail Output
V_IN−
R₁
V_IN+
V+ V−
2
7
1
4
INA326
8
3
5
6
V_O
G = 2(R₂/R₁)
R₂
C₂
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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.
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