型号INA331
品牌
分类仪表放大器
描述低功耗单电源 CMOS 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) 46
Features Cost Optimized, Shutdown
CMRR (min) (dB) 90
Input bias current (±) (max) (nA) 0.01
Iq (typ) (mA) 0.415
Bandwidth at min gain (typ) (MHz) 2
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) 7

封装 | 引脚 | 尺寸

VSSOP (DGK) 8 14.7 mm² 3 x 4.9

特性

  • 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 µV
  • HIGH CMRR: 94dB DC, 50dB at 45kHz
  • LOW BIAS CURRENT: 0.5pA
  • BANDWIDTH, SLEW RATE: 2.0MHz, 5V/µs
  • RAIL-TO-RAIL OUTPUT SWING: (V+)– 0.02V
  • WIDE TEMPERATURE RANGE: –55°C to +125°C
  • LOW QUIESCENT CURRENT: 490 µA max/chan
  • SHUT DOWN: 0.01 µA
  • 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

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说明

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 415µA (dropping to 0.01µA 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.