INA2321:微功耗单电源 CMOS 仪表放大器

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.

产品特性
  • 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
参数parametrics
参数INA2321INA321
Number of Channels (#)21
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 GroupTSSOPVSSOP
Approx. Price (US$)1.75 | 1ku1.10 | 1ku
Package Size: mm2:W x L (PKG)14TSSOP: 32 mm2: 6.4 x 5(TSSOP)8VSSOP: 15 mm2: 4.9 x 3(VSSOP)
Noise at 0.1 Hz - 10 Hz (Typ) (uVpp)2020
Gain Non-Linearity (+/-) (Max) (%)0.010.01
数据表?(1)
标题类型大小 (KB)日期
microPower Single-Supply CMOS Instrumentation AmplifierPDF9552006年 1月 31日
应用手册?(1)
标题类型大小 (KB)日期
所选封装材料的热学和电学性质PDF6452008年 10月 16日
选择与解决方案指南?(1)
标题类型大小 (KB)日期
模拟信号链路产品指南 (Rev. B)PDF55182013年 9月 3日
开发工具?(2)
培训内容型号类型
基于 SPICE 的模拟仿真程序TINA-TI电路设计和仿真
计算仪表放大器的输入共模范围INA-CMV-CALC计算工具
订购型号
型号试生产 / 生产材料状态温度(oC)价格(美金) | Quantity封装 | 引脚器件标记封装数量 | 载体
INA2321EA/250生产ACTIVE-55 to 1252.00 | 1kuTSSOP?(PW)INA 2321EA250 | SMALL T&R
INA2321EA/250G4生产ACTIVE-55 to 1252.00 | 1kuTSSOP?(PW)INA 2321EA250 | SMALL T&R
INA2321EA/2K5生产ACTIVE1.75 | 1kuTSSOP?(PW)INA 2321EA2500 | LARGE T&R
INA2321EA/2K5G4生产ACTIVE1.75 | 1kuTSSOP?(PW)INA 2321EA2500 | LARGE T&R
microPower Single-Supply CMOS Instrumentation Amplifier INA2321
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
INA2321
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