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INA828

現行

50-μV 偏移、7-nV/√Hz 雜訊、低功耗、精密儀器放大器

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產品規格表

INA828

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) 1000 Noise at 1 kHz (typ) (nV√Hz) 7 Features Overvoltage protection, Super-beta CMRR (min) (dB) 140 Input offset drift (±) (max) (µV/°C) 0.5 Input bias current (±) (max) (nA) 0.6 Iq (typ) (mA) 0.6 Bandwidth at min gain (typ) (MHz) 2 Gain error (±) (max) (%) 0.15 Operating temperature range (°C) -40 to 125 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.002 Output swing headroom (to negative supply) (typ) (V) 0.15 Output swing headroom (to positive supply) (typ) (V) -0.15 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) 0.14
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) 1000 Noise at 1 kHz (typ) (nV√Hz) 7 Features Overvoltage protection, Super-beta CMRR (min) (dB) 140 Input offset drift (±) (max) (µV/°C) 0.5 Input bias current (±) (max) (nA) 0.6 Iq (typ) (mA) 0.6 Bandwidth at min gain (typ) (MHz) 2 Gain error (±) (max) (%) 0.15 Operating temperature range (°C) -40 to 125 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.002 Output swing headroom (to negative supply) (typ) (V) 0.15 Output swing headroom (to positive supply) (typ) (V) -0.15 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) 0.14
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm)
  • Precision Instrumentation Amplifier Evolution:
    • Second Generation: INA828
    • First Generation: INA128
  • Low Offset Voltage: 50 µV, MAX
  • Gain Drift: 5 ppm/°C (G = 1), 50 ppm/°C (G > 1)
  • Noise: 7 nV/√Hz
  • Bandwidth: 2 MHz (G = 1), 260 kHz (G = 100)
  • Stable with 1-nF Capacitive Loads
  • Inputs Protected Up to ±40 V
  • Common-Mode Rejection:
    • 110 dB, MIN (G = 10)
  • Power-Supply Rejection: 100 dB, MIN (G = 1)
  • Supply Current: 650 µA, MAX
  • Supply Range:
    • Single Supply: 4.5 V to 36 V
    • Dual Supply: ±2.25 V to ±18 V
  • Specified Temperature Range:
    –40°C to +125°C
  • Package: 8-Pin SOIC
  • Precision Instrumentation Amplifier Evolution:
    • Second Generation: INA828
    • First Generation: INA128
  • Low Offset Voltage: 50 µV, MAX
  • Gain Drift: 5 ppm/°C (G = 1), 50 ppm/°C (G > 1)
  • Noise: 7 nV/√Hz
  • Bandwidth: 2 MHz (G = 1), 260 kHz (G = 100)
  • Stable with 1-nF Capacitive Loads
  • Inputs Protected Up to ±40 V
  • Common-Mode Rejection:
    • 110 dB, MIN (G = 10)
  • Power-Supply Rejection: 100 dB, MIN (G = 1)
  • Supply Current: 650 µA, MAX
  • Supply Range:
    • Single Supply: 4.5 V to 36 V
    • Dual Supply: ±2.25 V to ±18 V
  • Specified Temperature Range:
    –40°C to +125°C
  • Package: 8-Pin SOIC

The INA828 is a high-precision instrumentation amplifier that offers low power consumption and operates over a very wide single- or dual-supply range. A single external resistor sets any gain from 1 to 1000. The device offers excellent precision due to the use of new super-beta input transistors which provide exceptionally low input offset voltage, offset voltage drift, input bias current, and input voltage and current noise. Additional circuitry protects the inputs against overvoltage up to ±40 V.

The INA828 is optimized to provide excellent common-mode rejection ratio. At G = 1, the common-mode rejection ratio exceeds 90 dB across the full input common-mode range. The device is well-suited for low-voltage operation from a 5-V single supply as well as dual supplies up to ±18 V. Finally, INA828 is available in an 8-pin SOIC package and specified over the –40°C to +125°C temperature range.

The INA828 is a high-precision instrumentation amplifier that offers low power consumption and operates over a very wide single- or dual-supply range. A single external resistor sets any gain from 1 to 1000. The device offers excellent precision due to the use of new super-beta input transistors which provide exceptionally low input offset voltage, offset voltage drift, input bias current, and input voltage and current noise. Additional circuitry protects the inputs against overvoltage up to ±40 V.

The INA828 is optimized to provide excellent common-mode rejection ratio. At G = 1, the common-mode rejection ratio exceeds 90 dB across the full input common-mode range. The device is well-suited for low-voltage operation from a 5-V single supply as well as dual supplies up to ±18 V. Finally, INA828 is available in an 8-pin SOIC package and specified over the –40°C to +125°C temperature range.
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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 INA828 50-µV Offset, 7-nV/√Hz Noise, Low-Power, Precision Instrumentation Amplifier datasheet (Rev. A) PDF | HTML 2018/1/23
Circuit design AC coupled instrumentation amplifier circuit (Rev. A) PDF | HTML 2024/10/9
Circuit design Circuit for driving an ADC with an instrumentation amplifier in high gain (Rev. A) PDF | HTML 2024/9/24
Circuit design High common-mode differential input voltage to ±10-V ADC input circuit (Rev. A) PDF | HTML 2024/9/24
Circuit design Circuit for driving high-voltage SAR ADC with a buffered instrumentation (Rev. A) PDF | HTML 2024/9/20
Application brief How to Select Amplifiers for Pressure Transmitter Applications (Rev. B) PDF | HTML 2023/2/14
應用說明 Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps PDF | HTML 2021/7/27
Application brief Super-Beta Input Amplifiers: Features and Benefits PDF | HTML 2020/10/6
技術文章 What is an instrumentation amplifier? PDF | HTML 2019/8/9
技術文章 Taking a modular approach to high-precision, high-current battery test equipment PDF | HTML 2019/6/21
Application brief Comprehensive Error Calculation for Instrumentation Amplifiers 2019/3/26

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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
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模擬型號

ADS8568 TINA-TI Transient Spice Model (source files for SBAA286) (Rev. A)

SBAC216A.ZIP (48 KB) - TINA-TI Spice 模型
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模擬型號

ADS8568 TINA-TI Transient Spice Model (source files for SBAA314) (Rev. A)

SBAC215A.ZIP (112 KB) - TINA-TI Spice 模型
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模擬型號

ADS8568 TINA-TI Transient Spice Model (source files for SBAA316) (Rev. A)

SBAC217A.ZIP (54 KB) - TINA-TI Spice 模型
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模擬型號

INA828 PSpice Model (Rev. C)

SBOMAG5C.ZIP (25 KB) - PSpice 模型
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模擬型號

INA828 TINA-TI Reference Design (Rev. B)

SBOMAG3B.TSC (497 KB) - TINA-TI 參考設計
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模擬型號

INA828 TINA-TI Spice Model (Rev. B)

SBOMAG4B.ZIP (11 KB) - TINA-TI Spice 模型
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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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設計工具

CIRCUIT060067 — 交流電 (AC) 耦合儀器放大器電路

此電路會從 DC 耦合輸入到儀器放大器的 AC 耦合輸出。輸出會透過積分器回饋，積分器的輸出則用於調變放大器的參考電壓。這會建立高通濾波器，並可有效抵銷輸出偏移。此電路可避免輸入上需要大型電容器及電阻器，而這會大幅降低因元件不相符造成的 CMRR。
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參考設計

TIDA-01042 — 適合 50-A、100-A 及 200-A 應用的模組化電池測試器參考設計

此參考設計提供了模組化電池測試解決方案，可讓使用者透過單一設計，靈活測試不同電流位準的電池。此設計利用 TIDA-01041 參考設計，提供兩個可獨立運作或並聯的 100-A 電池測試器，以便將最大電流輸出從 100A 增加至 200A。此設計提供此解決方案的設計理論、零件選擇及最佳化。
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參考設計

TIDA-010986 — Rogowski 線圈參考設計的訊號調整

此參考設計為 Rogowski 線圈的訊號調理參考設計，旨在提升電表、斷路器、保護繼電器及電動車 (EV) 充電器中的電流測量精度。基於運算放大器的主動積分器設計，涵蓋寬廣的動態電流範圍，並兼具頻寬、穩定性以及可調增益（1V/V 至 525V/V）。該設計針對三相系統進行最佳化，並可與 TI 的 ADS131M08 計量評估模組介面相容。此設計在成本上與分流器設計相當，卻能達到類似電流互感器 (CT) 的精確度。
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOIC (D) 8 Ultra Librarian
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