首頁 放大器 運算放大器 (op amps) 精密運算放大器 (Vos < 1mV)
首頁
放大器
運算放大器 (op amps)
精密運算放大器 (Vos < 1mV)

LPV821

現行

650nA 精密零漂移奈米功率放大器

立即訂購
產品規格表

LPV821

現行
產品規格表 立即訂購

產品詳細資料

Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 3.6 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.7 Vos (offset voltage at 25°C) (max) (mV) 0.01 Offset drift (typ) (µV/°C) 0.02 GBW (typ) (MHz) 0.008 Features EMI Hardened, Zero Drift Slew rate (typ) (V/µs) 0.0033 Rail-to-rail In, Out Iq per channel (typ) (mA) 0.00065 Vn at 1 kHz (typ) (nV√Hz) 215 CMRR (typ) (dB) 125 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.021 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) 0 Input common mode headroom (to positive supply) (typ) (V) 0 Output swing headroom (to negative supply) (typ) (V) 0.012 Output swing headroom (to positive supply) (typ) (V) -0.012
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 3.6 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.7 Vos (offset voltage at 25°C) (max) (mV) 0.01 Offset drift (typ) (µV/°C) 0.02 GBW (typ) (MHz) 0.008 Features EMI Hardened, Zero Drift Slew rate (typ) (V/µs) 0.0033 Rail-to-rail In, Out Iq per channel (typ) (mA) 0.00065 Vn at 1 kHz (typ) (nV√Hz) 215 CMRR (typ) (dB) 125 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.021 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) 0 Input common mode headroom (to positive supply) (typ) (V) 0 Output swing headroom (to negative supply) (typ) (V) 0.012 Output swing headroom (to positive supply) (typ) (V) -0.012
SOT-23 (DBV) 5 8.12 mm² (2.9 mm × 2.8 mm)
  • Quiescent Current: 650 nA
  • Low Offset Voltage: ±10 µV (Maximum)
  • Offset Voltage Drift: ±0.096 µV/°C (Maximum)
  • 0.1-Hz to 10-Hz Noise: 3.9 µVPP
  • Input Bias Current: ±7 pA
  • Gain Bandwidth: 8 kHz
  • Supply Voltage: 1.7 V to 3.6 V
  • Rail-to-Rail Input/Output
  • Industry Standard Package
    • Single in 5-pin SOT-23
  • EMI Hardened
  • Quiescent Current: 650 nA
  • Low Offset Voltage: ±10 µV (Maximum)
  • Offset Voltage Drift: ±0.096 µV/°C (Maximum)
  • 0.1-Hz to 10-Hz Noise: 3.9 µVPP
  • Input Bias Current: ±7 pA
  • Gain Bandwidth: 8 kHz
  • Supply Voltage: 1.7 V to 3.6 V
  • Rail-to-Rail Input/Output
  • Industry Standard Package
    • Single in 5-pin SOT-23
  • EMI Hardened

The LPV821 is a single-channel, nanopower, zero-drift operational amplifier for “Always ON” sensing applications in wireless and wired equipment where low input offset is required. With the combination of low initial offset, low offset drift, and 8 kHz of bandwidth from 650 nA of quiescent current, the LPV821 is the industry’s lowest power zero-drift amplifier that can be used for end equipment that monitor current consumption, temperature, gas, or strain gauges.

The LPV821 zero-drift operational amplifier uses a proprietary auto-calibration technique to simultaneously provide low offset voltage (10 µV, maximum) and minimal drift over time and temperature. In addition to having low offset and ultra-low quiescent current, the LPV821 amplifier has pico-amp bias currents which reduce errors commonly introduced in applications monitoring sensors with high output impedance and amplifier configurations with megaohm feedback resistors.

The LPV821 amplifier also features an input stage with rail-to-rail input common mode range and an output stage that swings within 12 mV of the rails, maintaining the widest dynamic range possible. The device is EMI hardened to reduce system sensitivity to unwanted RF signals from mobile phones, WiFi, radio transmitters, and tag readers.

The LPV821 zero-drift amplifier operates with a single supply voltage as low as 1.7V, ensuring continuous performance in low battery situations over the extended temperature range of -40ºC to 125ºC. The LPV821 (single) is available in industry standard 5-pin SOT-23.

 

The LPV821 is a single-channel, nanopower, zero-drift operational amplifier for “Always ON” sensing applications in wireless and wired equipment where low input offset is required. With the combination of low initial offset, low offset drift, and 8 kHz of bandwidth from 650 nA of quiescent current, the LPV821 is the industry’s lowest power zero-drift amplifier that can be used for end equipment that monitor current consumption, temperature, gas, or strain gauges.

The LPV821 zero-drift operational amplifier uses a proprietary auto-calibration technique to simultaneously provide low offset voltage (10 µV, maximum) and minimal drift over time and temperature. In addition to having low offset and ultra-low quiescent current, the LPV821 amplifier has pico-amp bias currents which reduce errors commonly introduced in applications monitoring sensors with high output impedance and amplifier configurations with megaohm feedback resistors.

The LPV821 amplifier also features an input stage with rail-to-rail input common mode range and an output stage that swings within 12 mV of the rails, maintaining the widest dynamic range possible. The device is EMI hardened to reduce system sensitivity to unwanted RF signals from mobile phones, WiFi, radio transmitters, and tag readers.

The LPV821 zero-drift amplifier operates with a single supply voltage as low as 1.7V, ensuring continuous performance in low battery situations over the extended temperature range of -40ºC to 125ºC. The LPV821 (single) is available in industry standard 5-pin SOT-23.

 
filter 尋找其它 精密運算放大器 (Vos < 1mV)
下載 觀看有字幕稿的影片 影片

技術文件

找不到結果。請清除您的搜尋條件，然後再試一次。
檢視所有 11
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 LPV821, 650nA, Precision, Nanopower, Zero-Drift Amplifier datasheet (Rev. A) PDF | HTML 2017/12/15
Circuit design Low-power, bidirectional current-sensing circuit (Rev. B) PDF | HTML 2024/10/2
Circuit design Single-supply, low-side, unidirectional current-sensing circuit (Rev. A) PDF | HTML 2024/9/26
Application brief Zero-Drift Amplifiers: Features and Benefits (Rev. C) 2021/1/28
應用說明 Nano-Power Transimpedance Amplifier for Current Output Sensors 2018/3/7
Application brief GPIO Pins Power Signal Chain in Personal Electronics Running on Li-Ion Batteries 2018/2/12
技術文章 How to make precision measurements on a nanopower budget, part 2: current sensing PDF | HTML 2018/2/8
Application brief Simplifying Environmental Measurements in Power Conscious Factory and Building A (Rev. A) 2018/1/9
應用說明 Advantages of using Nanopower Zero Drift Amp for Mobile Phone Battery Voltage Mo (Rev. A) 2017/12/21
技術文章 How to make precision measurements on a nanopower budget, part 1: DC gain in nanop PDF | HTML 2017/12/6
應用說明 Current Sensing in No-Neutral Light Switches (Rev. A) 2017/10/16

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

AMP-PDK-EVM — 放大器性能開發套件評估模組

放大器性能開發套件 (PDK) 是一款評估模組 (EVM) 套件，可測試通用運算放大器 (op amp) 參數，並與大多數運算放大器和比較器相容。EVM 套件提供主板和多個插槽式子卡選項，可滿足封裝需求，使工程師能夠快速評估和驗證裝置性能。

AMP-PDK-EVM 套件支援五種最熱門的業界標準封裝，包括：

  • D (SOIC-8 和 SOIC-14)
  • PW (TSSOP-14)
  • DGK (VSSOP-8)
  • DBV (SOT23-5 和 SOT23-6)
  • DCK (SC70-5 和 SC70-6)
使用指南: PDF | HTML
支援產品和硬體
模擬型號

Comparator Over Current Detection TINA-TI Reference Design (Rev. A)

SBOMAH9A.TSC (44 KB) - TINA-TI 參考設計
支援產品和硬體
模擬型號

LPV821 PSpice Model (Rev. B)

SNOM630B.ZIP (31 KB) - PSpice 模型
支援產品和硬體
模擬型號

LPV821 TINA-TI Reference Design (Rev. B)

SNOM629B (315 KB) - TINA-TI 參考設計
支援產品和硬體
模擬型號

LPV821 TINA-TI Spice Model (Rev. B)

SNOM631B.ZIP (10 KB) - TINA-TI Spice 模型
支援產品和硬體
計算工具

OPAMP-NOISECALC — Noise Calculator

This folder contains three tools to help in understandning and managing noise in cicuits. The included tools are:

  • A noise generator tool - This is a Lab View 4-Run Time executable that generates Gaussian white noise, uniform white noise, 1/f noise, short noise, and 60Hz line noise. Temporal data, (...)
支援產品和硬體
設計工具

CIRCUIT060001 — 單電源、低壓側、單向電流感測電路

這款單電源供電、低壓側、電流感測解決方案可準確偵測高達 1A 的負載電流，並將其轉換為介於 50mV 和 4.9V 之間的電壓。輸入電流範圍與輸出電壓範圍可視需要調整，並可使用更大的供應以配合更大的振幅。
支援產品和硬體
設計工具

CIRCUIT060003 — 使用 PTC 熱敏電阻電路的溫度感測

此溫度感測電路使用與正溫度係數 (PTC) 熱敏電阻串聯的電阻器來組成分壓器，產生隨溫度變化呈線性的輸出電壓。電路在非反相放大器配置中使用運算放大器，含反相參考以偏移與放大訊號，有助於使用完整 ADC 解析度，並提升量測準確度。
支援產品和硬體
設計工具

CIRCUIT060007 — 低壓側雙向電流感測電路

這款單電源供電低壓側雙向電流感測解決方案可準確偵測 –1A 至 1A 的負載電流。輸出的線性範圍為 110mV 至 3.19V。低壓側電流感測可將共模電壓維持在接地附近，因此在具有較大匯流排電壓的應用中最為實用。

支援產品和硬體
設計工具

CIRCUIT060077 — 低功耗、雙向電流感測電路

這套低功耗、低壓側、雙向電流感測解決方案採用兩個極低功率、零漂移放大器 (LPV821) 和一個含整合式精密參考 (TLV3012) 的微電源比較器。此電路非常適合需要準確監控充電電流和系統電流的電池供電裝置。U1 和 U2 的增益則會獨立設定。如應用電路所示，LPV821 放大器透過 RSENSE 以失相方式連接，以放大反極性的電流。放大器 U2 線性放大充電 (正) 電流，而放大器 U1 線性放大系統 (負) 電流。當 U2 監控正電流時，U1 會將輸出驅動至接地。同樣地，U2 在 U1 監控負電流時，也會將輸出驅動至接地。放大器輸出與電阻器 R7 和 R8 一起進行 OR 運算，而 (...)
支援產品和硬體
參考設計

TIDA-010019 — 溫度感測器中適用於冷接點補償參考設計的 RTD 更換

使用熱電偶 (TC) 的溫度感測應用需要準確的本機溫度感測器來實現高準確度。此參考設計強調並說明例如冷接點補償 (CJC) 或包含超低功耗 TC 類比前端等設計挑戰的解決方案。關於功耗和準確度方面的性能，針對準確的 4 到 20mA 的感測器已進行最佳化，同時也展示了不同 CJC 和 TC 前端實作的性能。
支援產品和硬體
封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOT-23 (DBV) 5 Ultra Librarian
適用 TI 的評估品項標準條款與條件。

訂購與品質

建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。

支援與培訓

內含 TI 工程師技術支援的 TI E2E™ 論壇

以英文檢視所有論壇主題

內容係由 TI 和社群貢獻者依「現狀」提供，且不構成 TI 規範。檢視使用條款。

若有關於品質、封裝或訂購 TI 產品的問題，請參閱 TI 支援。​​​​​​​​​​​​​​

影片