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運算放大器 (op amps)
精密運算放大器 (Vos < 1mV)

OPA145

現行

單路、5.5-MHz、高電壓轉換率、低雜訊、低功耗 RRO 精密 JFET 運算放大器

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產品規格表

OPA145

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) 36 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.5 Vos (offset voltage at 25°C) (max) (mV) 0.15 Offset drift (typ) (µV/°C) 0.4 Input bias current (max) (pA) 10 GBW (typ) (MHz) 5.5 Slew rate (typ) (V/µs) 20 Rail-to-rail In to V-, Out Iq per channel (typ) (mA) 0.445 Vn at 1 kHz (typ) (nV√Hz) 7 CMRR (typ) (dB) 140 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.02 Architecture FET Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) -3.5 Output swing headroom (to negative supply) (typ) (V) 0.1 Output swing headroom (to positive supply) (typ) (V) -0.1 THD + N at 1 kHz (typ) (%) 0.0001
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 36 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.5 Vos (offset voltage at 25°C) (max) (mV) 0.15 Offset drift (typ) (µV/°C) 0.4 Input bias current (max) (pA) 10 GBW (typ) (MHz) 5.5 Slew rate (typ) (V/µs) 20 Rail-to-rail In to V-, Out Iq per channel (typ) (mA) 0.445 Vn at 1 kHz (typ) (nV√Hz) 7 CMRR (typ) (dB) 140 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.02 Architecture FET Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) -3.5 Output swing headroom (to negative supply) (typ) (V) 0.1 Output swing headroom (to positive supply) (typ) (V) -0.1 THD + N at 1 kHz (typ) (%) 0.0001
SOIC (D) 8 29.4 mm² (4.9 mm × 6 mm) SOT-23 (DBV) 5 8.12 mm² (2.9 mm × 2.8 mm) VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • Best bandwidth and slew-rate-to-power ratio:
    • gain-bandwidth product: 5.5 MHz
    • Slew rate: 20 V/µs
    • Low supply current: 475 µA (maximum)
  • High precision:
    • Very low offset: 150 µV (maximum)
    • Very low offset drift: 1 µV/°C (maximum)
  • Low input bias current: 2 pA
  • Excellent noise performance:
    • Very low voltage noise: 7 nV/√Hz
    • Very low current noise: 0.8 fA/√ Hz
  • Input-voltage range includes V– supply
  • Single-supply operation: 4.5 V to 36 V
  • Dual-supply operation: ±2.25 V to ±18 V
  • Best bandwidth and slew-rate-to-power ratio:
    • gain-bandwidth product: 5.5 MHz
    • Slew rate: 20 V/µs
    • Low supply current: 475 µA (maximum)
  • High precision:
    • Very low offset: 150 µV (maximum)
    • Very low offset drift: 1 µV/°C (maximum)
  • Low input bias current: 2 pA
  • Excellent noise performance:
    • Very low voltage noise: 7 nV/√Hz
    • Very low current noise: 0.8 fA/√ Hz
  • Input-voltage range includes V– supply
  • Single-supply operation: 4.5 V to 36 V
  • Dual-supply operation: ±2.25 V to ±18 V

The OPA145 and OPA2145 (OPAx145) devices are part of a family of low-power JFET input amplifier that have excellent drift, low current noise, and pico-ampere input bias current. These features make the OPAx145 an excellent choice for amplifying small signals from high-impedance sensors.

The rail-to-rail output swing interfaces to modern, single-supply, precision, analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). In addition, the input range that includes V– allows designers to simplify power management and take advantage of the single-supply, low-noise JFET architecture.

The OPA145 and OPA2145 (OPAx145) devices are part of a family of low-power JFET input amplifier that have excellent drift, low current noise, and pico-ampere input bias current. These features make the OPAx145 an excellent choice for amplifying small signals from high-impedance sensors.

The rail-to-rail output swing interfaces to modern, single-supply, precision, analog-to-digital converters (ADCs) and digital-to-analog converters (DACs). In addition, the input range that includes V– allows designers to simplify power management and take advantage of the single-supply, low-noise JFET architecture.
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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 OPAx145 High-Precision, Low-Noise, Rail-to-Rail Output, 5.5-MHz JFET Operational Amplifiers datasheet (Rev. F) PDF | HTML 2021/3/31
Application brief MUX-Friendly, Precision Operational Amplifiers (Rev. C) PDF | HTML 2022/2/8
Application brief EMI-Hardened Op Amps Reduce Errors In Pulse Oximeters (Rev. A) 2019/8/21
Application brief Simplify Transimpedance Applications with High-bandwidth, Precision JFET Op Amps 2019/5/21
Application brief Green-Williams-Lis: Improved Op Amp Spice Model 2019/1/28

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
支援產品和硬體
模擬型號

OPA145 PSpice Model (Rev. C)

SBOMAD8C.ZIP (33 KB) - PSpice 模型
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模擬型號

OPA145 TINA-TI Reference Design (Rev. C)

SBOMAD6C (1033 KB) - TINA-TI 參考設計
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模擬型號

OPA145 TINA-TI Spice Model (Rev. C)

SBOMAD7C.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。

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, (...)
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設計工具

SBOC501 — Simulation for Transimpedance Amplifier

支援產品和硬體
封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOIC (D) 8 Ultra Librarian
SOT-23 (DBV) 5 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian
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