型号INA321
品牌
分类仪表放大器
描述具有关断功能的微功耗 (40µA)、500µV 失调电压、10pA 偏置、RRO 仪表放大器
相关操作
产品概述

参数

Number of channels 1
Vs (max) (V) 5.5
Vs (min) (V) 2.5
Input offset (±) (max) (µV) 500
Voltage gain (min) (V/V) 5
Voltage gain (max) (V/V) 1000
Noise at 1 kHz (typ) (nV√Hz) 100
Features Cost Optimized, Shutdown
CMRR (min) (dB) 90
Input bias current (±) (max) (nA) 0.01
Iq (typ) (mA) 0.04
Bandwidth at min gain (typ) (MHz) 0.5
Gain error (±) (max) (%) 0.1
Operating temperature range (°C) -55 to 125
Rating Catalog
Type Resistor
Gain nonlinearity (±) (max) (%) 0.01
Output swing headroom (to negative supply) (typ) (V) 0.025
Output swing headroom (to positive supply) (typ) (V) -0.025
Input common mode headroom (to negative supply) (typ) (V) 0.55
Input common mode headroom (to positive supply) (typ) (V) -1.7
Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 20

封装 | 引脚 | 尺寸

VSSOP (DGK) 8 14.7 mm² 3 x 4.9

特性

  • LOW QUIESCENT CURRENT: 40µA/channel Shut Down: < 1µA
  • HIGH GAIN ACCURACY: G = 5, 0.02%, 2ppm/°C
  • GAIN SET WITH EXTERNAL RESISTORS
  • LOW OFFSET VOLTAGE: ±200µV
  • 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

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说明

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 40µA. When shutdown, the INA321 has a quiescent current of less than 1µA. 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.