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

OPA2325

現行

具有 RRIO 和零交越功能的雙精密度、高頻寬、低雜訊、低功耗 ADC 驅動運算放大器

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產品規格表

OPA2325

現行
產品規格表 立即訂購

產品詳細資料

Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.2 Vos (offset voltage at 25°C) (max) (mV) 0.15 Offset drift (typ) (µV/°C) 2 Input bias current (max) (pA) 10 GBW (typ) (MHz) 10 Features Zero Crossover Slew rate (typ) (V/µs) 5 Rail-to-rail In, Out Iq per channel (typ) (mA) 0.65 Vn at 1 kHz (typ) (nV√Hz) 10 CMRR (typ) (dB) 114 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.03 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) 0.1 Output swing headroom (to negative supply) (typ) (V) 0.01 Output swing headroom (to positive supply) (typ) (V) -0.01 THD + N at 1 kHz (typ) (%) 0.0005
Number of channels 2 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.2 Vos (offset voltage at 25°C) (max) (mV) 0.15 Offset drift (typ) (µV/°C) 2 Input bias current (max) (pA) 10 GBW (typ) (MHz) 10 Features Zero Crossover Slew rate (typ) (V/µs) 5 Rail-to-rail In, Out Iq per channel (typ) (mA) 0.65 Vn at 1 kHz (typ) (nV√Hz) 10 CMRR (typ) (dB) 114 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.03 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) 0.1 Output swing headroom (to negative supply) (typ) (V) 0.01 Output swing headroom (to positive supply) (typ) (V) -0.01 THD + N at 1 kHz (typ) (%) 0.0005
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • Precision with zero-crossover distortion:
    • Low offset voltage: 150 µV (maximum)
    • High CMRR: 114 dB
    • Rail-to-rail I/O
  • Wide bandwidth: 10 MHz
  • Quiescent current: 650 µA/ch
  • Single-supply voltage range: 2.2 V to 5.5 V
  • Low input bias current: 0.2 pA
  • Low noise: 9 nV/√Hz at 10 kHz
  • Slew rate: 5 V/µs
  • Unity-gain stable
  • Precision with zero-crossover distortion:
    • Low offset voltage: 150 µV (maximum)
    • High CMRR: 114 dB
    • Rail-to-rail I/O
  • Wide bandwidth: 10 MHz
  • Quiescent current: 650 µA/ch
  • Single-supply voltage range: 2.2 V to 5.5 V
  • Low input bias current: 0.2 pA
  • Low noise: 9 nV/√Hz at 10 kHz
  • Slew rate: 5 V/µs
  • Unity-gain stable

The OPA325, OPA2325, and OPA4325 (OPAx325) are precision, low-voltage complementary metal-oxide semiconductor (CMOS) operational amplifiers optimized for very low noise and wide bandwidth, while operating on a low quiescent current of only 650 µA.

The OPAx325 feature a linear input stage with zero-crossover distortion that delivers excellent common-mode rejection ratio (CMRR) of typically 114 dB over the entire input range. The input common-mode range extends 100 mV beyond the negative and positive supply rails. The output voltage typically swings within 10 mV of the rails.

The zero-crossover distortion, combined with wide bandwidth (10 MHz), high slew rate (5 V/µs), and low noise (9 nV/√Hz), make the OPAx325 a very good successive-approximation register (SAR) analog-to-digital converter (ADC) input driver amplifier. In addition, the OPAx325 have a wide supply-voltage range from 2.2 V to 5.5 V, with excellent power-supply rejection ratio (PSRR) over the entire supply range, making the device an excellent choice for precision, low-power applications that run directly from batteries without regulation.

The OPA325 (single-channel version) is available in the SOT23-5 package. The OPA2325 (dual-channel version) is offered in SO-8 and MSOP-8 packages. The OPA4325 (quad-channel version) is available in TSSOP-14 package.

The OPA325, OPA2325, and OPA4325 (OPAx325) are precision, low-voltage complementary metal-oxide semiconductor (CMOS) operational amplifiers optimized for very low noise and wide bandwidth, while operating on a low quiescent current of only 650 µA.

The OPAx325 feature a linear input stage with zero-crossover distortion that delivers excellent common-mode rejection ratio (CMRR) of typically 114 dB over the entire input range. The input common-mode range extends 100 mV beyond the negative and positive supply rails. The output voltage typically swings within 10 mV of the rails.

The zero-crossover distortion, combined with wide bandwidth (10 MHz), high slew rate (5 V/µs), and low noise (9 nV/√Hz), make the OPAx325 a very good successive-approximation register (SAR) analog-to-digital converter (ADC) input driver amplifier. In addition, the OPAx325 have a wide supply-voltage range from 2.2 V to 5.5 V, with excellent power-supply rejection ratio (PSRR) over the entire supply range, making the device an excellent choice for precision, low-power applications that run directly from batteries without regulation.

The OPA325 (single-channel version) is available in the SOT23-5 package. The OPA2325 (dual-channel version) is offered in SO-8 and MSOP-8 packages. The OPA4325 (quad-channel version) is available in TSSOP-14 package.
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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 OPAx325 Precision, 10-MHz, Low-Noise, Low-Power, RRIO, CMOS Operational Amplifiers datasheet (Rev. D) PDF | HTML 2019/6/26
Circuit design Half-Wave Rectifier Circuit (Rev. B) PDF | HTML 2024/5/17
Application brief Zero-crossover Amplifiers: Features and Benefits (Rev. B) PDF | HTML 2023/11/8
Application brief Multichannel Analog Input Modules for PLC Equipment 2019/1/4
Application brief How to Properly Configure Unused Operational Amplifiers (Rev. A) 2018/9/21
電子書 The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML 2017/3/28

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
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模擬型號

OPAx325 PSpice Model (Rev. C)

SBOMA82C.ZIP (29 KB) - PSpice 模型
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模擬型號

OPAx325 TINA-TI Reference Design (Rev. B)

SBOMA81B (317 KB) - TINA-TI 參考設計
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模擬型號

OPAx325 TINA-TI Spice Model (Rev. B)

SBOMA80B.ZIP (10 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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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, (...)
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設計工具

CIRCUIT060009 — 半波整流器電路

精密半波整流器只轉換並傳輸時間變化輸入訊號 (最好是正弦) 的負半輸入至其輸出。適當選擇回饋電阻值後，即可獲得不同的增益。精密半波整流器通常與其他運算放大器電路一起使用，例如峰值偵測器或有限頻寬的非反相放大器，以產生 DC 輸出電壓。此配置的設計旨在以高達 50kHz 的頻率處理 0.2mVpp 和 4Vpp 之間的正弦輸入訊號。
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設計工具

SBOC509 — Simulation for Half-Wave Rectifier

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參考設計

TIDA-01469 — 採用無線震動感測器並支援預防性維護的馬達監控參考設計

此參考設計為一低功耗無線子系統解決方案，可利用震動感測監控馬達，以判斷是否需進行預防性維護。振動資料的 FFT 可透過 Bluetooth 低功耗或 sub-1GHz 無線通訊協定傳送至其他裝置。此子系統解決方案的低功率和無線功能使其能夠在單顆鈕扣電池上運作，進而使裝置體積小巧，價格低廉，並置於難以觸及的位置。這使此參考設計成為可避免昂貴預防性維護，以及需要有線連接之更大、更昂貴監視器的理想替代方案。
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封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOIC (D) 8 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian
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