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INA128

現行

精密、130-dB CMRR、700-µA、低功耗的儀器放大器

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產品規格表

INA128

現行
產品規格表 立即訂購

產品詳細資料

Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 4.5 Input offset (±) (max) (µV) 50 Voltage gain (min) (V/V) 1 Voltage gain (max) (V/V) 10000 Noise at 1 kHz (typ) (nV√Hz) 8 Features Current Feedback, Overvoltage protection CMRR (min) (dB) 120 Input offset drift (±) (max) (µV/°C) 0.5 Input bias current (±) (max) (nA) 5 Iq (typ) (mA) 0.7 Bandwidth at min gain (typ) (MHz) 1.3 Gain error (±) (max) (%) 0.5 Operating temperature range (°C) -40 to 125 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.004 Output swing headroom (to negative supply) (typ) (V) 0.8 Output swing headroom (to positive supply) (typ) (V) -0.9 Input common mode headroom (to negative supply) (typ) (V) 1.7 Input common mode headroom (to positive supply) (typ) (V) -1.4 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.2
Number of channels 1 Vs (max) (V) 36 Vs (min) (V) 4.5 Input offset (±) (max) (µV) 50 Voltage gain (min) (V/V) 1 Voltage gain (max) (V/V) 10000 Noise at 1 kHz (typ) (nV√Hz) 8 Features Current Feedback, Overvoltage protection CMRR (min) (dB) 120 Input offset drift (±) (max) (µV/°C) 0.5 Input bias current (±) (max) (nA) 5 Iq (typ) (mA) 0.7 Bandwidth at min gain (typ) (MHz) 1.3 Gain error (±) (max) (%) 0.5 Operating temperature range (°C) -40 to 125 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.004 Output swing headroom (to negative supply) (typ) (V) 0.8 Output swing headroom (to positive supply) (typ) (V) -0.9 Input common mode headroom (to negative supply) (typ) (V) 1.7 Input common mode headroom (to positive supply) (typ) (V) -1.4 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.2
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) PDIP (P) 8 92.5083 mm² (9.81 mm × 9.43 mm)
  • Low offset voltage: 50µV, maximum
  • Low drift: 0.5µV/°C, maximum
  • Low input bias current:
    • 5nA, maximum (CSO: SHE)
    • 0.7nA, maximum (CSO: FRE)
  • Low noise: 8nV/√Hz, 0.2µVpp
  • High CMR: 120dB, minimum
  • Bandwidth: 1.3MHz (G = 1)
  • Inputs protected to ±40V
  • Wide supply range: ±2.25V to ±18V
  • Low quiescent current: 700µA
  • Packages: 8-pin plastic DIP, SO-8
  • Low offset voltage: 50µV, maximum
  • Low drift: 0.5µV/°C, maximum
  • Low input bias current:
    • 5nA, maximum (CSO: SHE)
    • 0.7nA, maximum (CSO: FRE)
  • Low noise: 8nV/√Hz, 0.2µVpp
  • High CMR: 120dB, minimum
  • Bandwidth: 1.3MHz (G = 1)
  • Inputs protected to ±40V
  • Wide supply range: ±2.25V to ±18V
  • Low quiescent current: 700µA
  • Packages: 8-pin plastic DIP, SO-8

The INA128 and INA129 (INA12x) are low-power, general-purpose instrumentation amplifiers that offer excellent accuracy. The versatile three op amp design and small size make these amplifiers an excellent choice for a wide range of applications. Current-feedback input circuitry provides wide bandwidth even at high gain (200kHz at G = 100).

A single external resistor sets any gain from 1 to 10,000. The INA128 provides an industry-standard gain equation with a 50kΩ resistor. The INA129 gain equation uses a 49.4kΩ resistor to allow for drop-in replacements of comparable devices.

The INA12x are available in plastic DIP and surface-mount packages, specified for the –40°C to +85°C temperature range. The INA128 is also available in a dual configuration, the INA2128.

The upgraded INA828 offers a lower input bias current (0.6nA, maximum) and lower noise (7nV/√Hz) at the same quiescent current. See the Device Comparison Table for a selection of precision instrumentation amplifiers from Texas Instruments.

The INA128 and INA129 (INA12x) are low-power, general-purpose instrumentation amplifiers that offer excellent accuracy. The versatile three op amp design and small size make these amplifiers an excellent choice for a wide range of applications. Current-feedback input circuitry provides wide bandwidth even at high gain (200kHz at G = 100).

A single external resistor sets any gain from 1 to 10,000. The INA128 provides an industry-standard gain equation with a 50kΩ resistor. The INA129 gain equation uses a 49.4kΩ resistor to allow for drop-in replacements of comparable devices.

The INA12x are available in plastic DIP and surface-mount packages, specified for the –40°C to +85°C temperature range. The INA128 is also available in a dual configuration, the INA2128.

The upgraded INA828 offers a lower input bias current (0.6nA, maximum) and lower noise (7nV/√Hz) at the same quiescent current. See the Device Comparison Table for a selection of precision instrumentation amplifiers from Texas Instruments.
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技術文件

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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 INA12x Precision, Low-Power Instrumentation Amplifiers datasheet (Rev. G) PDF | HTML 2026/1/16
應用說明 Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps PDF | HTML 2021/7/27
Application brief Comprehensive Error Calculation for Instrumentation Amplifiers 2019/3/26
應用說明 A Numerical Protection Relay Solution (Rev. A) 2018/7/26
電子書 The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML 2017/3/28
使用指南 Instrumentation Amplifier With DC Rejection Design Guide 2015/5/14
類比設計期刊 Getting the most out of your instrumentation amplifier design 2005/10/10

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

INAEVM — 通用儀器放大器評估模組

The universal INAEVM (Instrumentation Amplifier Evaluation Module) is available in two package options that simplify prototyping precision instrumentation amplifiers in either the SO-8 (D) package or the MSOP-8(DGK) package with the pinout shown.  See the chart in the user guide (...)

使用指南: PDF | HTML
支援產品和硬體
模擬型號

INA128 TINA TI Reference Design

SBOM762.TSC (88 KB) - TINA-TI 參考設計
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模擬型號

INA128 TINA TI Spice Model

SBOM763.ZIP (5 KB) - TINA-TI Spice 模型
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模擬型號

INA128x and INA129x PSpice Model (Rev. A)

SBOM764A.ZIP (25 KB) - PSpice 模型
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模擬型號

INA2128 TINA-TI Reference Design (Rev. C)

SBOC146B (88 KB) - TINA-TI 參考設計
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計算工具

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

類比工程師的計算機旨在加速類比電路設計工程師定期使用的許多重複計算。此基於 PC 的工具提供圖形介面，列出各種常見計算，從使用回饋電阻器設定運算放大器增益到選擇適當的電路設計元件以穩定類比數位轉換器 (ADC) 驅動緩衝電路。

除了作為獨立工具使用外，此計算機還與類比工程師口袋參考中描述的概念相得益彰。

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參考設計

TIPD191 — 具有 DC 抑制功能的儀器放大器參考設計

此設計為 AC 耦合儀器放大器。更具體來說，電路會放大 AC 差動輸入訊號，並拒絕 DC 差動和共模訊號。輸入為 DC 耦合，因此可透過偏移儀器放大器參考電壓來抵銷輸出偏移，藉此實現有效的 AC 耦合。

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封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOIC (D) 8 Ultra Librarian
PDIP (P) 8 Ultra Librarian
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