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INA125

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具有精密电压基准的仪表放大器

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数据表

INA125

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数据表 立即订购

产品详情

Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 2.7 Input offset (±) (max) (µV) 250 Voltage gain (min) (V/V) 4 Voltage gain (max) (V/V) 10000 Noise at 1 kHz (typ) (nV√Hz) 38 Features Overvoltage protection CMRR (min) (dB) 100 Input offset drift (±) (max) (µV/°C) 2 Input bias current (±) (max) (nA) 25 Iq (typ) (mA) 0.46 Bandwidth at min gain (typ) (MHz) 0.15 Gain error (±) (max) (%) 0.5 Operating temperature range (°C) -40 to 85 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.004 Output swing headroom (to negative supply) (typ) (V) 0.4 Output swing headroom (to positive supply) (typ) (V) -0.9 Input common mode headroom (to negative supply) (typ) (V) 4.3 Input common mode headroom (to positive supply) (typ) (V) -4.8 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.8
Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 2.7 Input offset (±) (max) (µV) 250 Voltage gain (min) (V/V) 4 Voltage gain (max) (V/V) 10000 Noise at 1 kHz (typ) (nV√Hz) 38 Features Overvoltage protection CMRR (min) (dB) 100 Input offset drift (±) (max) (µV/°C) 2 Input bias current (±) (max) (nA) 25 Iq (typ) (mA) 0.46 Bandwidth at min gain (typ) (MHz) 0.15 Gain error (±) (max) (%) 0.5 Operating temperature range (°C) -40 to 85 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.004 Output swing headroom (to negative supply) (typ) (V) 0.4 Output swing headroom (to positive supply) (typ) (V) -0.9 Input common mode headroom (to negative supply) (typ) (V) 4.3 Input common mode headroom (to positive supply) (typ) (V) -4.8 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.8
SOIC (D) 16 59.4 mm² (9.9 mm × 6 mm) PDIP (N) 16 181.42 mm² (19.3 mm × 9.4 mm)
  • LOW QUIESCENT CURRENT: 460µA
  • PRECISION VOLTAGE REFERENCE: 1.24V, 2.5V, 5V or 10V
  • SLEEP MODE
  • LOW OFFSET VOLTAGE: 250µV max
  • LOW OFFSET DRIFT: 2µV/°C max
  • LOW INPUT BIAS CURRENT: 20nA max
  • HIGH CMR: 100dB min
  • LOW NOISE: 38nV/sqrt(Hz) at f = 1kHz
  • INPUT PROTECTION TO ±40V
  • WIDE SUPPLY RANGE
    • Single Supply: 2.7V to 36V
    • Dual Supply: ±1.35V to ±18V
  • 16-PIN DIP and SO-16 SOIC PACKAGES
  • LOW QUIESCENT CURRENT: 460µA
  • PRECISION VOLTAGE REFERENCE: 1.24V, 2.5V, 5V or 10V
  • SLEEP MODE
  • LOW OFFSET VOLTAGE: 250µV max
  • LOW OFFSET DRIFT: 2µV/°C max
  • LOW INPUT BIAS CURRENT: 20nA max
  • HIGH CMR: 100dB min
  • LOW NOISE: 38nV/sqrt(Hz) at f = 1kHz
  • INPUT PROTECTION TO ±40V
  • WIDE SUPPLY RANGE
    • Single Supply: 2.7V to 36V
    • Dual Supply: ±1.35V to ±18V
  • 16-PIN DIP and SO-16 SOIC PACKAGES

The INA125 is a low power, high accuracy instrumentation amplifier with a precision voltage reference. It provides complete bridge excitation and precision differential-input amplification on a single integrated circuit.

A single external resistor sets any gain from 4 to 10,000. The INA125 is laser-trimmed for low offset voltage (250µV), low offset drift (2µV/°C), and high common-mode rejection (100dB at G = 100). It operates on single (+2.7V to +36V) or dual (±1.35V to ±18V) supplies.

The voltage reference is externally adjustable with pin-selectable voltages of 2.5V, 5V, or 10V, allowing use with a variety of transducers. The reference voltage is accurate to ±0.5% (max) with ±35ppm/°C drift (max). Sleep mode allows shutdown and duty cycle operation to save power.

The INA125 is available in 16-pin plastic DIP and SO-16 surface-mount packages and is specified for the -40°C to +85°C industrial temperature range.

The INA125 is a low power, high accuracy instrumentation amplifier with a precision voltage reference. It provides complete bridge excitation and precision differential-input amplification on a single integrated circuit.

A single external resistor sets any gain from 4 to 10,000. The INA125 is laser-trimmed for low offset voltage (250µV), low offset drift (2µV/°C), and high common-mode rejection (100dB at G = 100). It operates on single (+2.7V to +36V) or dual (±1.35V to ±18V) supplies.

The voltage reference is externally adjustable with pin-selectable voltages of 2.5V, 5V, or 10V, allowing use with a variety of transducers. The reference voltage is accurate to ±0.5% (max) with ±35ppm/°C drift (max). Sleep mode allows shutdown and duty cycle operation to save power.

The INA125 is available in 16-pin plastic DIP and SO-16 surface-mount packages and is specified for the -40°C to +85°C industrial temperature range.
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* 数据表 Instrumentation Amplifier with Precision Voltage Reference 数据表 2000-9-27
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应用简报 简化电池测试设备中的电压和电流测量 (Rev. A) PDF | HTML 英语版 (Rev.A) PDF | HTML 2022-4-14
电子书 An Engineer's Guide to Current Sensing (Rev. B) 2022-4-12
电子书 简化电流感应 (Rev. A) 2020-1-9
电子书 The Signal e-book: 有关运算放大器设计主题的博客文章汇编 PDF | HTML 英语版 PDF | HTML 2018-1-31

设计与开发

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仿真模型

INA125 PSpice Model (Rev. B)

SBOM020B.ZIP (25 KB) - PSpice 模型
支持的产品和硬件
计算工具

ANALOG-ENGINEER-CALC — PC software analog engineer's calculator

模拟工程师计算器旨在加快模拟电路设计工程师经常运用的许多重复性计算。该基于 PC 的工具提供图形界面，其中显示各种常见计算列表，从使用反馈电阻器设置运算放大器增益到选择合适的电路设计元件，以稳定模数转换器 (ADC) 驱动器缓冲器电路。

除了可用作独立工具之外，该计算器还能很好地与模拟工程师口袋参考中所述的概念配合使用。

支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
SOIC (D) 16 Ultra Librarian
PDIP (N) 16 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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