INA331:Low-Power, Single Supply, CMOS, Instrumentation Amplifier

The INA331 and INA2331 are rail-to-rail output, low-power CMOS instrumentation amplifiers that offer wide range, single-supply operation as well as bipolar-supply operation. The INA331 family provides low-cost, low-noise amplification of differential signals with a low quiescent current of 415?A (dropping to 0.01?A when shutdown). Returning to normal operation within microseconds, this INA can be used for battery or multi-channel applications.

Configured internally in a gain of 5V/V, the INA331 offers flexibility in higher gains by choosing external resistors.

The INA331 rejects line noise and its harmonics, because common-mode error remains low even at higher frequencies.

High bandwidth and slew rate makes the INA331 ideal for directly driving sampling Analog-to-Digital (A/D) converters as well as general-purpose applications.

With high precision, low cost, and small packages, the INA331 outperforms discrete designs. They are specified for a wide temperature range of -55°C to +125°C.

Features
  • DESIGNED FOR LOW COST
  • HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/°C
  • GAIN SET WITH EXT. RESISTORS FOR >5V/V
  • LOW OFFSET VOLTAGE: ±250 ?V
  • HIGH CMRR: 94dB DC, 50dB at 45kHz
  • LOW BIAS CURRENT: 0.5pA
  • BANDWIDTH, SLEW RATE: 2.0MHz, 5V/?s
  • RAIL-TO-RAIL OUTPUT SWING: (V+)– 0.02V
  • WIDE TEMPERATURE RANGE: –55°C to +125°C
  • LOW QUIESCENT CURRENT: 490 ?A max/chan
  • SHUT DOWN: 0.01 ?A
  • MSOP-8 SINGLE AND TSSOP-14 DUAL PACKAGES
  • APPLICATIONS
    • INDUSTRIAL SENSOR AMPLIFIERS:
        Bridge, RTD, Thermocouple, Position
    • PHYSIOLOGICAL AMPLIFIERS:
        ECG, EEG, EMG
    • A/D CONVERTER SIGNAL CONDITIONING
    • DIFFERENTIAL LINE RECEIVERS WITH GAIN
    • FIELD UTILITY METERS
    • PCMCIA CARDS
    • AUDIO AMPLIFIERS
    • COMMUNICATION SYSTEMS
    • TEST EQUIPMENT
    • AUTOMOTIVE INSTRUMENTATION
  • INDUSTRIAL SENSOR AMPLIFIERS:
      Bridge, RTD, Thermocouple, Position
  • PHYSIOLOGICAL AMPLIFIERS:
      ECG, EEG, EMG
  • A/D CONVERTER SIGNAL CONDITIONING
  • DIFFERENTIAL LINE RECEIVERS WITH GAIN
  • FIELD UTILITY METERS
  • PCMCIA CARDS
  • AUDIO AMPLIFIERS
  • COMMUNICATION SYSTEMS
  • TEST EQUIPMENT
  • AUTOMOTIVE INSTRUMENTATION
Parametrics
keyINA331INA2331
Number of Channels (#)12
Vs (Min) (V)2.52.5
Vs (Max) (V)5.55.5
CMRR (Min) (dB)9090
Input Offset (+/-) (Max) (uV)500500
Input Offset Drift (+/-) (Max) (uV/C)55
Input Bias Current (+/-) (Max) (nA)0.010.01
Noise at 1kHz (Typ) (nV/rt(Hz))4646
Iq (Typ) (mA)0.4150.415
Bandwidth at Min Gain (Typ) (MHz)22
Gain (Min) (V/V)55
Gain (Max) (V/V)10001000
Gain Error (+/-) (Max) (%)0.10.1
RatingCatalogCatalog
Operating Temperature Range (C)-55 to 125-55 to 125
Package GroupVSSOPTSSOP
Approx. Price (US$)0.80 | 1ku1.20 | 1ku
Package Size: mm2:W x L (PKG)8VSSOP: 15 mm2: 4.9 x 3(VSSOP)14TSSOP: 32 mm2: 6.4 x 5(TSSOP)
Noise at 0.1 Hz - 10 Hz (Typ) (uVpp)77
Gain Non-Linearity (+/-) (Max) (%)0.10.1
Datasheet?(1)
TitleTypeSize (KB)Date
Low-Power, Single-Supply, CMOS Instrumentation Amplifiers (Rev. C)PDF98404 Apr 2005
Application notes?(1)
TitleTypeSize (KB)Date
Linear operating region of two-op-amp instrumentation amplifiers with gain stagePDF77821 Jul 2016
Selection & solution guides?(1)
TitleTypeSize (KB)Date
Analog Signal Chain Guide (Rev. B)PDF600011 Jul 2013
Models?(3)
TitleTypeSize (KB)Date
INA331 PSpice Model (Rev. A)ZIP59?KB04 Oct 2011
INA331 TINA-TI Reference Design (Rev. B)TSC93?KB04 Oct 2011
INA331 TINA-TI Spice Model (Rev. A)ZIP9?KB04 Oct 2011
Development tools?(2)
NamePart#Type
Calculate Input Common-Mode Range of Instrumentation AmplifiersINA-CMV-CALCCalculation Tools
SPICE-Based Analog Simulation ProgramTINA-TICircuit Design & Simulation
Ordering Information
Part #Preproduction / Production MaterialStatusTemp(oC)Price | QTYPackage | PinsDevice MarkingPackage QTY | Carrier
INA331AIDGKRProductionACTIVE-55 to 1250.80 | 1kuVSSOP?(DGK)C312500 | LARGE T&R
INA331AIDGKRG4ProductionACTIVE-55 to 1250.80 | 1kuVSSOP?(DGK)C312500 | LARGE T&R
INA331AIDGKTProductionACTIVE-55 to 1250.92 | 1kuVSSOP?(DGK)C31250 | SMALL T&R
INA331AIDGKTG4ProductionACTIVE-55 to 1250.92 | 1kuVSSOP?(DGK)C31250 | SMALL T&R
INA331IDGKRProductionACTIVE-55 to 1251.12 | 1kuVSSOP?(DGK)C312500 | LARGE T&R
INA331IDGKRG4ProductionACTIVE-55 to 1251.12 | 1kuVSSOP?(DGK)C312500 | LARGE T&R
INA331IDGKTProductionACTIVE-55 to 1251.24 | 1kuVSSOP?(DGK)C31250 | SMALL T&R
INA331IDGKTG4ProductionACTIVE-55 to 1251.24 | 1kuVSSOP?(DGK)C31250 | SMALL T&R
Low-Power, Single-Supply, CMOS Instrumentation Amplifiers INA331
所选封装材料的热学和电学性质 DCP010505B
Linear operating region of two-op-amp instrumentation amplifiers with gain stage INA-CMV-CALC
模拟信号链路产品指南 (Rev. B) BQ24392
INA331 PSpice Model INA331
INA331 TINA-TI Reference Design INA331
INA331 TINA-TI Spice Model INA331
INA331
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