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運算放大器 (op amps)
精密運算放大器 (Vos < 1mV)

OPA4391

現行

四路、微功耗、高速功率比、低偏壓電流 RRIO 精密運算放大器

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產品規格表

OPA4391

現行
產品規格表 立即訂購

產品詳細資料

Number of channels 4 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.7 Vos (offset voltage at 25°C) (max) (mV) 0.045 Offset drift (typ) (µV/°C) 1 Input bias current (max) (pA) 0.8 GBW (typ) (MHz) 1 Features e-Trim™ Slew rate (typ) (V/µs) 1 Rail-to-rail In, Out Iq per channel (typ) (mA) 0.0235 Vn at 1 kHz (typ) (nV√Hz) 60 CMRR (typ) (dB) 121 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.06 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) 0.003 Output swing headroom (to positive supply) (typ) (V) -0.003 THD + N at 1 kHz (typ) (%) 0.002
Number of channels 4 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.7 Vos (offset voltage at 25°C) (max) (mV) 0.045 Offset drift (typ) (µV/°C) 1 Input bias current (max) (pA) 0.8 GBW (typ) (MHz) 1 Features e-Trim™ Slew rate (typ) (V/µs) 1 Rail-to-rail In, Out Iq per channel (typ) (mA) 0.0235 Vn at 1 kHz (typ) (nV√Hz) 60 CMRR (typ) (dB) 121 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.06 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) 0.003 Output swing headroom (to positive supply) (typ) (V) -0.003 THD + N at 1 kHz (typ) (%) 0.002
TSSOP (PW) 14 32 mm² (5 mm × 6.4 mm)
  • Low IQ: 24µA
  • Gain bandwidth product: 1MHz
  • Low input bias current: 10fA
  • Low offset voltage: ±45µV (maximum)
  • Low drift: ±1.2µV/°C
  • Low supply voltage operation: 1.7V to 5.5V
  • Input common mode range ±100mV beyond rail
  • Fast slew rate: 1V/µs
  • High load capacitance drive
  • High output current drive: 60mA
  • Rail-to-rail output
  • EMI and RFI filtered inputs
  • Small package options: SC-70, DSBGA
  • Low IQ: 24µA
  • Gain bandwidth product: 1MHz
  • Low input bias current: 10fA
  • Low offset voltage: ±45µV (maximum)
  • Low drift: ±1.2µV/°C
  • Low supply voltage operation: 1.7V to 5.5V
  • Input common mode range ±100mV beyond rail
  • Fast slew rate: 1V/µs
  • High load capacitance drive
  • High output current drive: 60mA
  • Rail-to-rail output
  • EMI and RFI filtered inputs
  • Small package options: SC-70, DSBGA

The OPA391, OPA2391, and OPA4391 (OPAx391) devices feature a unique combination of high bandwidth (1MHz) along with very-low quiescent current (24µA) in high-precision amplifiers. These features combined with rail-to-rail input and output make these devices an exceptional choice in high-gain, low-power applications. Ultra-low input bias current of 10fA, only 45µV of offset (maximum), and 1.2µV/°C of drift over temperature help maintain high precision in ratiometric and amperometric sensor front ends that have demanding low-power requirements.

The OPAx391 use Texas Instruments’ proprietary e‑trim™ operational amplifier technology, enabling a unique combination of ultra-low offset and low input offset drift without the need for any input switching or auto-zero techniques. The CMOS-based technology platform also features a modern, robust output stage design that is tolerant of high output capacitance, alleviating stability problems that are common in typical low-power amplifiers.

The OPA391, OPA2391, and OPA4391 (OPAx391) devices feature a unique combination of high bandwidth (1MHz) along with very-low quiescent current (24µA) in high-precision amplifiers. These features combined with rail-to-rail input and output make these devices an exceptional choice in high-gain, low-power applications. Ultra-low input bias current of 10fA, only 45µV of offset (maximum), and 1.2µV/°C of drift over temperature help maintain high precision in ratiometric and amperometric sensor front ends that have demanding low-power requirements.

The OPAx391 use Texas Instruments’ proprietary e‑trim™ operational amplifier technology, enabling a unique combination of ultra-low offset and low input offset drift without the need for any input switching or auto-zero techniques. The CMOS-based technology platform also features a modern, robust output stage design that is tolerant of high output capacitance, alleviating stability problems that are common in typical low-power amplifiers.

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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 OPAx391 Precision, Ultra-Low IQ , Low Offset Voltage, e-trim™ Operational Amplifiers datasheet (Rev. E) PDF | HTML 2024/10/28

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

OPAx391 PSpice Model (Rev. B)

SBOMBK1B.ZIP (28 KB) - PSpice 模型
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模擬型號

OPAx391 TINA-TI Reference Design (Rev. A)

SBOMBJ9A (333 KB) - TINA-TI 參考設計
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模擬型號

OPAx391 TINA-TI SPICE Model (Rev. A)

SBOMBK0A.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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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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封裝 針腳 CAD 符號、佔位空間與 3D 模型
TSSOP (PW) 14 Ultra Librarian
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