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INA121

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FET 输入低功耗仪表放大器

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INA121

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产品详情

Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 4.5 Input offset (±) (max) (µV) 500 Voltage gain (min) (V/V) 1 Voltage gain (max) (V/V) 10000 Noise at 1 kHz (typ) (nV√Hz) 20 Features Overvoltage protection CMRR (min) (dB) 106 Input offset drift (±) (max) (µV/°C) 5 Input bias current (±) (max) (nA) 0.05 Iq (typ) (mA) 0.45 Bandwidth at min gain (typ) (MHz) 0.6 Gain error (±) (max) (%) 0.5 Operating temperature range (°C) -40 to 85 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.005 Output swing headroom (to negative supply) (typ) (V) 0.15 Output swing headroom (to positive supply) (typ) (V) -0.9 Input common mode headroom (to negative supply) (typ) (V) 2 Input common mode headroom (to positive supply) (typ) (V) -2 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 1
Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 4.5 Input offset (±) (max) (µV) 500 Voltage gain (min) (V/V) 1 Voltage gain (max) (V/V) 10000 Noise at 1 kHz (typ) (nV√Hz) 20 Features Overvoltage protection CMRR (min) (dB) 106 Input offset drift (±) (max) (µV/°C) 5 Input bias current (±) (max) (nA) 0.05 Iq (typ) (mA) 0.45 Bandwidth at min gain (typ) (MHz) 0.6 Gain error (±) (max) (%) 0.5 Operating temperature range (°C) -40 to 85 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.005 Output swing headroom (to negative supply) (typ) (V) 0.15 Output swing headroom (to positive supply) (typ) (V) -0.9 Input common mode headroom (to negative supply) (typ) (V) 2 Input common mode headroom (to positive supply) (typ) (V) -2 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 1
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) PDIP (P) 8 92.5083 mm² (9.81 mm × 9.43 mm)
  • LOW BIAS CURRENT: ±4pA
  • LOW QUIESCENT CURRENT: ±450µA
  • LOW INPUT OFFSET VOLTAGE: ±200µV
  • LOW INPUT OFFSET DRIFT: ±2µV/°C
  • LOW INPUT NOISE: 20nV/sqrt(Hz) at f = 1kHz (G =100)
  • HIGH CMR: 106dB
  • WIDE SUPPLY RANGE: ±2.25V to ±18V
  • LOW NONLINEARITY ERROR: 0.001% max
  • INPUT PROTECTION TO ±40V
  • 8-PIN DIP AND SO-8 SURFACE MOUNT
  • LOW BIAS CURRENT: ±4pA
  • LOW QUIESCENT CURRENT: ±450µA
  • LOW INPUT OFFSET VOLTAGE: ±200µV
  • LOW INPUT OFFSET DRIFT: ±2µV/°C
  • LOW INPUT NOISE: 20nV/sqrt(Hz) at f = 1kHz (G =100)
  • HIGH CMR: 106dB
  • WIDE SUPPLY RANGE: ±2.25V to ±18V
  • LOW NONLINEARITY ERROR: 0.001% max
  • INPUT PROTECTION TO ±40V
  • 8-PIN DIP AND SO-8 SURFACE MOUNT

The INA121 is a FET-input, low power instrumentation amplifier offering excellent accuracy. Its versatile three-op amp design and very small size make it ideal for a variety of general purpose applications. Low bias current (±4pA) allows use with high impedance sources.

Gain can be set from 1V to 10,000V/V with a single external resistor. Internal input protection can withstand up to ±40V without damage.

The INA121 is laser-trimmed for very low offset voltage (±200µV), low offset drift (±2µV/°C), and high common-mode rejection (106dB at G = 100). It operates on power supplies as low as ±2.25V (+4.5V), allowing use in battery operated and single 5V systems. Quiescent current is only 450µA.

Package options include 8-pin plastic DIP and SO-8 surface mount. All are specified for the -40°C to +85°C industrial temperature range.

The INA121 is a FET-input, low power instrumentation amplifier offering excellent accuracy. Its versatile three-op amp design and very small size make it ideal for a variety of general purpose applications. Low bias current (±4pA) allows use with high impedance sources.

Gain can be set from 1V to 10,000V/V with a single external resistor. Internal input protection can withstand up to ±40V without damage.

The INA121 is laser-trimmed for very low offset voltage (±200µV), low offset drift (±2µV/°C), and high common-mode rejection (106dB at G = 100). It operates on power supplies as low as ±2.25V (+4.5V), allowing use in battery operated and single 5V systems. Quiescent current is only 450µA.

Package options include 8-pin plastic DIP and SO-8 surface mount. All are specified for the -40°C to +85°C industrial temperature range.
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* 数据表 FET-Input, Low Power Instrumentation Amplifier 数据表 2000-9-27
应用手册 输入偏置电流回路在仪表放大器应用中的重要性 PDF | HTML 英语版 PDF | HTML 2022-4-22
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设计与开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

评估板

INAEVM — 通用仪表放大器评估模块

通用 INAEVM（仪表放大器评估模块）以两种封装选项形式提供，简化了采用 SO-8 (D) 封装或 MSOP-8(DGK) 封装的精密仪器放大器（具有如图所示的引脚）的原型设计。请参阅下图了解兼容的 TI INA。注意：这些电路板尚未组装，因此请记住需要订购仪表放大器器件样片。

用户指南: PDF | HTML
支持的产品和硬件
仿真模型

INA121 PSpice Model (Rev. B)

SBOM018B.ZIP (25 KB) - PSpice 模型
支持的产品和硬件
仿真模型

INA121 TINA-TI Reference Design (Rev. B)

SBOC140B.TSC (91 KB) - TINA-TI 参考设计
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) 8 Ultra Librarian
PDIP (P) 8 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

订购和质量

支持和培训

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