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INA326

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精密低漂移 CMOS 儀器放大器

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產品規格表

INA326

現行
產品規格表 立即訂購

產品詳細資料

Number of channels 1 Vs (max) (V) 5.5 Vs (min) (V) 2.7 Input offset (±) (max) (µV) 100 Voltage gain (min) (V/V) 0.1 Voltage gain (max) (V/V) 1000 Noise at 1 kHz (typ) (nV√Hz) 33 Features Cost Optimized CMRR (min) (dB) 100 Input offset drift (±) (max) (µV/°C) 0.4 Input bias current (±) (max) (nA) 2 Iq (typ) (mA) 2.4 Bandwidth at min gain (typ) (MHz) 0.001 Gain error (±) (max) (%) 0.2 Operating temperature range (°C) -40 to 85 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.01 Output swing headroom (to negative supply) (typ) (V) 0.005 Output swing headroom (to positive supply) (typ) (V) -0.005 Input common mode headroom (to negative supply) (typ) (V) -0.02 Input common mode headroom (to positive supply) (typ) (V) 0.1 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.8
Number of channels 1 Vs (max) (V) 5.5 Vs (min) (V) 2.7 Input offset (±) (max) (µV) 100 Voltage gain (min) (V/V) 0.1 Voltage gain (max) (V/V) 1000 Noise at 1 kHz (typ) (nV√Hz) 33 Features Cost Optimized CMRR (min) (dB) 100 Input offset drift (±) (max) (µV/°C) 0.4 Input bias current (±) (max) (nA) 2 Iq (typ) (mA) 2.4 Bandwidth at min gain (typ) (MHz) 0.001 Gain error (±) (max) (%) 0.2 Operating temperature range (°C) -40 to 85 Rating Catalog Type Resistor Gain nonlinearity (±) (max) (%) 0.01 Output swing headroom (to negative supply) (typ) (V) 0.005 Output swing headroom (to positive supply) (typ) (V) -0.005 Input common mode headroom (to negative supply) (typ) (V) -0.02 Input common mode headroom (to positive supply) (typ) (V) 0.1 Noise at 0.1 Hz to 10 Hz (typ) (µVPP) 0.8
VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • PRECISION
       LOW OFFSET: 100 µV (max)
       LOW OFFSET DRIFT: 0.4 µV/°C (max)
       EXCELLENT LONG-TERM STABILITY
       VERY-LOW 1/f NOISE
  • TRUE RAIL-TO-RAIL I/O
       INPUT COMMON-MODE RANGE:
          20mV Below Negative Rail to 100mV Above Positive Rail
       WIDE OUTPUT SWING: Within 10mV of Rails
       SUPPLY RANGE: Single +2.7V to +5.5V
  • SMALL SIZE
       microPACKAGE: MSOP-8, MSOP-10
  • LOW COST
  • APPLICATIONS
    • LOW-LEVEL TRANSDUCER AMPLIFIER FOR BRIDGES, LOAD CELLS, THERMOCOUPLES
    • WIDE DYNAMIC RANGE SENSOR MEASUREMENTS
    • HIGH-RESOLUTION TEST SYSTEMS
    • WEIGH SCALES
    • MULTI-CHANNEL DATA ACQUISITION SYSTEMS
    • MEDICAL INSTRUMENTATION
    • GENERAL-PURPOSE
  • PRECISION
       LOW OFFSET: 100 µV (max)
       LOW OFFSET DRIFT: 0.4 µV/°C (max)
       EXCELLENT LONG-TERM STABILITY
       VERY-LOW 1/f NOISE
  • TRUE RAIL-TO-RAIL I/O
       INPUT COMMON-MODE RANGE:
          20mV Below Negative Rail to 100mV Above Positive Rail
       WIDE OUTPUT SWING: Within 10mV of Rails
       SUPPLY RANGE: Single +2.7V to +5.5V
  • SMALL SIZE
       microPACKAGE: MSOP-8, MSOP-10
  • LOW COST
  • APPLICATIONS
    • LOW-LEVEL TRANSDUCER AMPLIFIER FOR BRIDGES, LOAD CELLS, THERMOCOUPLES
    • WIDE DYNAMIC RANGE SENSOR MEASUREMENTS
    • HIGH-RESOLUTION TEST SYSTEMS
    • WEIGH SCALES
    • MULTI-CHANNEL DATA ACQUISITION SYSTEMS
    • MEDICAL INSTRUMENTATION
    • GENERAL-PURPOSE

The INA326 and INA327 (with shutdown) are high-performance, low-cost, precision instrumentation amplifiers with rail-to-rail input and output. They are true single-supply instrumentation amplifiers with very low DC errors and input common-mode ranges that extends beyond the positive and negative rails. These features make them suitable for applications ranging from general-purpose to high-accuracy.

Excellent long-term stability and very low 1/f noise assure low offset voltage and drift throughout the life of the product.

The INA326 (without shutdown) comes in the MSOP-8 package. The INA327 (with shutdown) is offered in an MSOP-10. Both are specified over the industrial temperature range, –40°C to +85°C, with operation from –40°C to +125°C.

The INA326 and INA327 (with shutdown) are high-performance, low-cost, precision instrumentation amplifiers with rail-to-rail input and output. They are true single-supply instrumentation amplifiers with very low DC errors and input common-mode ranges that extends beyond the positive and negative rails. These features make them suitable for applications ranging from general-purpose to high-accuracy.

Excellent long-term stability and very low 1/f noise assure low offset voltage and drift throughout the life of the product.

The INA326 (without shutdown) comes in the MSOP-8 package. The INA327 (with shutdown) is offered in an MSOP-10. Both are specified over the industrial temperature range, –40°C to +85°C, with operation from –40°C to +125°C.
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重要文件 類型 標題 格式選項 日期
* Data sheet INA326, 327: Precision, Rail-To-Rail I/O Instrumentation Amplifier datasheet (Rev. D) 2004年 11月 3日
Application note Low-level voltage-to-current converter circuit (Rev. A) PDF | HTML 2024年 10月 10日
Application note Designing Temperature Monitoring Systems with NTC and RTD PDF | HTML 2024年 5月 15日
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps PDF | HTML 2021年 7月 27日
Circuit design 3-decade, load-current sensing circuit (Rev. A) PDF | HTML 2019年 2月 1日
E-book The Signal e-book: A compendium of blog posts on op amp design topics 2017年 3月 28日
Analog Design Journal A dual-polarity, bidirectional current-shunt monitor 2008年 10月 22日
Analog Design Journal Q4 2008 Issue Analog Applications Journal 2008年 10月 22日
Application note Low-Cost Noise-Immune Isolated Thermocouple Signal Processor 2007年 1月 8日
Analog Design Journal Getting the most out of your instrumentation amplifier design 2005年 10月 10日

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

PLABS-SAR-EVM-PDK — TI Precision Labs SAR ADC 評估模組性能展示套件 (PDK)

PLABS-SAR-EVM-PDK 是一款實驗平台，需與 TI Precision Labs 影片配合使用，可幫助深入理解 漸近法暫存器 (SAR) 類比轉數位轉換器 (ADC) 電路。此評估模組 (EVM) 平台包含兩個通道的常見 SAR ADC 電路，可輕鬆連接至精密訊號注入器評估模組 (PSIEVM)，該模組能提供低失真、低雜訊的輸入訊號來驅動 SAR ADC；第三個通道則設計用於展示超低功耗 ADC 在不同吞吐量下的功耗變化。該 EVM 平台還包含 10 塊可安裝於主機板上的試樣卡，用於展示不同前端驅動電路對性能的影響。

PLABS-SAR-EVM-PDK 使用者指南提供了 EVM (...)

使用指南: PDF
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模擬型號

INA326 PSpice Model (Rev. B)

SBOM150B.ZIP (31 KB) - PSpice Model
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模擬型號

INA326 TINA-TI Reference Design Enhanced Long Simulation Time (Rev. B)

SBOC169B.TSC (119 KB) - TINA-TI Reference Design
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模擬型號

INA326 TINA-TI Spice Model Enhanced-Long Simulation Time (Rev. A)

SBOM248A.ZIP (10 KB) - TINA-TI Spice Model
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模擬型號

INA326T TINA-TI Reference Design Standard-Recommended (Rev. B)

SBOC170B.TSC (129 KB) - TINA-TI Reference Design
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模擬型號

INA326T TINA-TI Spice Model Standard-Recommended (Rev. A)

SBOM249A.ZIP (9 KB) - TINA-TI Spice Model
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計算工具

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

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)

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設計工具

CIRCUIT060031 — 3-十進位、負載電流感測電路

這款單電源供電、低壓側、電流感測解決方案可準確偵測 10 μA 至 10 mA 之間的負載電流。實作獨特但簡易的增益切換網路，以準確測量三個十進位的負載電流範圍。
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設計工具

CIRCUIT060043 — 低階電壓至電流轉換器電路

此電路可將精密的低位準電流 IL 提供至負載 RL。此設計以單一 5-V 電源運作，並使用一個精密低漂移運算放大器和一個儀器放大器。簡單的修改可改變電壓至電流 (V-I) 轉換器的範圍與準確度。
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設計工具

SBOC498 — Simulation for 3-Decade, Load-Current Sensing Circuit

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模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI 是有助於評估類比電路功能的設計和模擬環境。這款全功能設計和模擬套件使用 Cadence® 的類比分析引擎。PSpice for TI 包括業界最大的模型庫之一，涵蓋我們的類比和電源產品組合，以及特定類比行為模型，且使用無需支付費用。

PSpice for TI 設計和模擬環境可讓您使用其內建函式庫來模擬複雜的混合訊號設計。在進行佈局和製造之前，建立完整的終端設備設計和解決方案原型，進而縮短上市時間並降低開發成本。 

在 PSpice for TI 設計與模擬工具中，您可以搜尋 TI (...)
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模擬工具

TINA-TI — 基於 SPICE 的類比模擬程式

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
使用指南: PDF
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參考設計

TIPD193 — 使用儀器放大器和電流參考的 RTD 轉電壓參考設計

This reference design translates resistance temperature detectors (RTD) resistance to a voltage level convenient for an ADC input. A precision current reference provides excitation and an instrumentation amplifier scales the signal. The design also uses a three wire RTD configuration to minimize (...)
使用指南: PDF
電路圖: PDF
參考設計

TIPD107 — 低位準 V-I 轉換器參考設計、0V 至 5V 輸入轉換為 0uA 至 5uA 輸出

This Verified Design is a micro-Amp voltage-to-current (V-I) converter circuit that delivers a precise low level current to a load. The design operates on a single 5V supply and uses a precision low drift op-amp, and instrumentation amplifier. Simple modification can change the range and accuracy (...)
使用指南: PDF
電路圖: PDF
參考設計

TIPD104 — 電流感測解決方案、10uA-10mA、低壓側、單電源供電

This reference design provides the theory, component selection, and simulation of a single-supply, precision low-side current sensing solution that can accurately detect load currents from 10uA-10mA. The corresponding linear output is from 100mV to 4.9V. While traditional op amps can be used for (...)
使用指南: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
VSSOP (DGK) 8 Ultra Librarian
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