INA321:Micropower single-supply CMOS Instrumentation Amplifier

The INA321 family is a series of rail-to-rail output, micropower CMOS instrumentation amplifiers that offer wide-range, single-supply, as well as bipolar-supply operation. The INA321 family provides low-cost, low-noise amplification of differential signals with micropower current consumption of 40?A. When shutdown, the INA321 has a quiescent current of less than 1?A. Returning to normal operations within nanoseconds, the shutdown feature makes the INA321 optimal for low-power battery or multiplexing applications.

Configured internally for 5V/V gain, the INA321 offers exceptional flexibility with user-programmable external gain resistors. The INA321 reduces common-mode error over frequency and with CMRR remaining high up to 3kHz, line noise and line harmonics are rejected.

The low-power design does not compromise on bandwidth or slew rate, making the INA321 ideal for driving sample Analog-to-Digital (A/D) converters as well as general-purpose applications. With high precision, low cost, and small packaging, the INA321 outperforms discrete designs, while offering reliability and performance.

Features
  • LOW QUIESCENT CURRENT: 40?A/channel Shut Down: < 1?A
  • HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/°C
  • GAIN SET WITH EXTERNAL RESISTORS
  • LOW OFFSET VOLTAGE: ±200?V
  • HIGH CMRR: 94dB
  • LOW BIAS CURRENT: 10pA
  • BANDWIDTH: 500kHz, G = 5V/V
  • RAIL-TO-RAIL OUTPUT SWING: (V+) - 0.02V
  • WIDE TEMPERATURE RANGE: -55°C to +125°C
  • SINGLE VERSION IN MSOP-8 PACKAGE AND DUAL VERSION IN TSSOP-14 PACKAGE
  • APPLICATIONS
    • INDUSTRIAL SENSOR AMPLIFIERS: Bridge, RTD, Thermistor, Position
    • PHYSIOLOGICAL AMPLIFIERS: ECG, EEG, EMG
    • A/D CONVERTER SIGNAL CONDITIONING
    • DIFFERENTIAL LINE RECEIVERS WITH GAIN
    • FIELD UTILITY METERS
    • PCMCIA CARDS
    • COMMUNICATION SYSTEMS
    • TEST EQUIPMENT
    • AUTOMOTIVE INSTRUMENTATION
  • INDUSTRIAL SENSOR AMPLIFIERS: Bridge, RTD, Thermistor, Position
  • PHYSIOLOGICAL AMPLIFIERS: ECG, EEG, EMG
  • A/D CONVERTER SIGNAL CONDITIONING
  • DIFFERENTIAL LINE RECEIVERS WITH GAIN
  • FIELD UTILITY METERS
  • PCMCIA CARDS
  • COMMUNICATION SYSTEMS
  • TEST EQUIPMENT
  • AUTOMOTIVE INSTRUMENTATION
Parametrics
keyINA321INA2321
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)77
Input Bias Current (+/-) (Max) (nA)0.010.01
Noise at 1kHz (Typ) (nV/rt(Hz))100100
Iq (Typ) (mA)0.040.04
Bandwidth at Min Gain (Typ) (MHz)0.50.5
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$)1.10 | 1ku1.75 | 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)2020
Gain Non-Linearity (+/-) (Max) (%)0.010.01
Datasheet?(1)
TitleTypeSize (KB)Date
microPower Single-Supply CMOS Instrumentation Amplifier (Rev. D)PDF95531 Jan 2006
Selection & solution guides?(3)
TitleTypeSize (KB)Date
Analog Signal Chain Guide (Rev. B)PDF600011 Jul 2013
TI HealthTech Health Guide (Rev. A)PDF483802 May 2013
TI HealthTech Fitness GuidePDF359410 Apr 2013
Models?(3)
TitleTypeSize (KB)Date
INA321 PSpice Model (Rev. A)ZIP55?KB04 Oct 2011
INA321 TINA-TI Reference Design (Rev. B)TSC86?KB04 Oct 2011
INA321 TINA-TI Spice Model (Rev. A)ZIP3?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
INA321E/250ProductionACTIVE-55 to 1251.70 | 1kuVSSOP?(DGK)C21250 | SMALL T&R
INA321E/250G4ProductionACTIVE-55 to 1251.70 | 1kuVSSOP?(DGK)C21250 | SMALL T&R
INA321E/2K5ProductionACTIVE-55 to 1251.55 | 1kuVSSOP?(DGK)C212500 | LARGE T&R
INA321E/2K5G4ProductionACTIVE-55 to 1251.55 | 1kuVSSOP?(DGK)C212500 | LARGE T&R
INA321EA/250ProductionACTIVE-55 to 1251.25 | 1kuVSSOP?(DGK)C21250 | SMALL T&R
INA321EA/250G4ProductionACTIVE-55 to 1251.25 | 1kuVSSOP?(DGK)C21250 | SMALL T&R
INA321EA/2K5ProductionACTIVE-55 to 1251.10 | 1kuVSSOP?(DGK)C212500 | LARGE T&R
INA321EA/2K5G4ProductionACTIVE-55 to 1251.10 | 1kuVSSOP?(DGK)C212500 | LARGE T&R
microPower Single-Supply CMOS Instrumentation Amplifier INA321
所选封装材料的热学和电学性质 DCP010505B
模拟信号链路产品指南 (Rev. B) BQ24392
TI HealthTech Health Guide TPS7A49
TI HealthTech Fitness Guide ADS1298ECGFE-PDK
INA321 PSpice Model INA321
INA321 TINA-TI Reference Design INA321
INA321 TINA-TI Spice Model INA321
INA321
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