主页 放大器 运算放大器 (op amps) 精密运算放大器 (Vos<1mV)
主页
放大器
运算放大器 (op amps)
精密运算放大器 (Vos<1mV)

OPA381

正在供货

精确低功耗高速互阻抗放大器

立即订购
数据表

OPA381

正在供货
数据表 立即订购

产品详情

Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.7 Vos (offset voltage at 25°C) (max) (mV) 0.025 Offset drift (typ) (µV/°C) 0.03 Input bias current (max) (pA) 50 GBW (typ) (MHz) 18 Features Small Size Slew rate (typ) (V/µs) 12 Rail-to-rail In to V-, Out Iq per channel (typ) (mA) 0.8 Vn at 1 kHz (typ) (nV√Hz) 114 CMRR (typ) (dB) 110 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.01 Architecture FET Input common mode headroom (to negative supply) (typ) (V) 0 Input common mode headroom (to positive supply) (typ) (V) -1.8 Output swing headroom (to negative supply) (typ) (V) 0.03 Output swing headroom (to positive supply) (typ) (V) -0.4
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 2.7 Vos (offset voltage at 25°C) (max) (mV) 0.025 Offset drift (typ) (µV/°C) 0.03 Input bias current (max) (pA) 50 GBW (typ) (MHz) 18 Features Small Size Slew rate (typ) (V/µs) 12 Rail-to-rail In to V-, Out Iq per channel (typ) (mA) 0.8 Vn at 1 kHz (typ) (nV√Hz) 114 CMRR (typ) (dB) 110 Rating Catalog Operating temperature range (°C) -40 to 125 Iout (typ) (A) 0.01 Architecture FET Input common mode headroom (to negative supply) (typ) (V) 0 Input common mode headroom (to positive supply) (typ) (V) -1.8 Output swing headroom (to negative supply) (typ) (V) 0.03 Output swing headroom (to positive supply) (typ) (V) -0.4
VSON (DRB) 8 9 mm² (3 mm × 3 mm) VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • OVER 250kHz TRANSIMPEDANCE BANDWIDTH
  • DYNAMIC RANGE: 5 Decades
  • EXCELLENT LONG-TERM STABILITY
  • LOW VOLTAGE NOISE: 10nV/Hz
  • BIAS CURRENT: 3pA
  • OFFSET VOLTAGE: 25µV (max)
  • OFFSET DRIFT: 0.1µV/°C (max)
  • GAIN BANDWIDTH: 18MHz
  • QUIESCENT CURRENT: 800µA
  • FAST OVERLOAD RECOVERY
  • SUPPLY RANGE: 2.7V to 5.5V
  • SINGLE AND DUAL VERSIONS
  • MicroPACKAGE: DFN-8, MSOP-8
  • APPLICATIONS
    • PRECISION I/V CONVERSION
    • PHOTODIODE MONITORING
    • OPTICAL AMPLIFIERS
    • CAT-SCANNER FRONT-END
    • PHOTO LAB EQUIPMENT

All trademarks are the property of their respective owners.
  • OVER 250kHz TRANSIMPEDANCE BANDWIDTH
  • DYNAMIC RANGE: 5 Decades
  • EXCELLENT LONG-TERM STABILITY
  • LOW VOLTAGE NOISE: 10nV/Hz
  • BIAS CURRENT: 3pA
  • OFFSET VOLTAGE: 25µV (max)
  • OFFSET DRIFT: 0.1µV/°C (max)
  • GAIN BANDWIDTH: 18MHz
  • QUIESCENT CURRENT: 800µA
  • FAST OVERLOAD RECOVERY
  • SUPPLY RANGE: 2.7V to 5.5V
  • SINGLE AND DUAL VERSIONS
  • MicroPACKAGE: DFN-8, MSOP-8
  • APPLICATIONS
    • PRECISION I/V CONVERSION
    • PHOTODIODE MONITORING
    • OPTICAL AMPLIFIERS
    • CAT-SCANNER FRONT-END
    • PHOTO LAB EQUIPMENT

All trademarks are the property of their respective owners.

The OPA381 family of transimpedance amplifiers provides 18MHz of Gain Bandwidth (GBW), with extremely high precision, excellent long-term stability, and very low 1/f noise. The OPA381 features an offset voltage of 25µV (max), offset drift of 0.1µV/°C (max), and bias current of 3pA. The OPA381 far exceeds the offset, drift, and noise performance that conventional JFET op amps provide.

The signal bandwidth of a transimpedance amplifier depends largely on the GBW of the amplifier and the parasitic capacitance of the photodiode, as well as the feedback resistor. The 18MHz GBW of the OPA381 enables a trans-impedance bandwidth of >: 250kHz in most configurations. The OPA381 is ideally suited for fast control loops for power level measurement on an optical fiber.

As a result of the high precision and low-noise characteristics of the OPA381, a dynamic range of 5 decades can be achieved. This capability allows the measurement of signal currents in the order of 10nA, and up to 1mA in a single I/V conversion stage. In contrast to logarithmic amplifiers, the OPA381 provides very wide bandwidth throughout the full dynamic range. By using an external pulldown resistor to –5V, the output voltage range can be extended to include 0V.

The OPA381 and OPA2381 are both available in MSOP-8 and DFN-8 (3mm x 3mm) packages. They are specified from –40°C to +125°C.

The OPA381 family of transimpedance amplifiers provides 18MHz of Gain Bandwidth (GBW), with extremely high precision, excellent long-term stability, and very low 1/f noise. The OPA381 features an offset voltage of 25µV (max), offset drift of 0.1µV/°C (max), and bias current of 3pA. The OPA381 far exceeds the offset, drift, and noise performance that conventional JFET op amps provide.

The signal bandwidth of a transimpedance amplifier depends largely on the GBW of the amplifier and the parasitic capacitance of the photodiode, as well as the feedback resistor. The 18MHz GBW of the OPA381 enables a trans-impedance bandwidth of >: 250kHz in most configurations. The OPA381 is ideally suited for fast control loops for power level measurement on an optical fiber.

As a result of the high precision and low-noise characteristics of the OPA381, a dynamic range of 5 decades can be achieved. This capability allows the measurement of signal currents in the order of 10nA, and up to 1mA in a single I/V conversion stage. In contrast to logarithmic amplifiers, the OPA381 provides very wide bandwidth throughout the full dynamic range. By using an external pulldown resistor to –5V, the output voltage range can be extended to include 0V.

The OPA381 and OPA2381 are both available in MSOP-8 and DFN-8 (3mm x 3mm) packages. They are specified from –40°C to +125°C.
filter 查找其他 精密运算放大器 (Vos<1mV)
下载 观看带字幕的视频 视频

技术文档

未找到结果。请清除搜索并重试。
查看全部 2
顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 OPA381, OPA2381: Precision, Low Power, 18MHz Transimpedance Amplifier 数据表 (Rev. B) 2004-11-18
电子书 The Signal e-book: 有关运算放大器设计主题的博客文章汇编 PDF | HTML 英语版 PDF | HTML 2018-1-31

设计与开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

评估板

AMP-PDK-EVM — 放大器高性能开发套件评估模块

放大器高性能开发套件 (PDK) 是一款用于测试常见运算放大器参数的评估模块 (EVM) 套件，与大多数运算放大器和比较器均兼容。该 EVM 套件提供了一个主板，主板上具有多个插槽式子卡选项以满足封装需求，使工程师能够快速评估和验证器件性能。

AMP-PDK-EVM 套件支持五种常用的业界通用封装，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）
用户指南: PDF | HTML
支持的产品和硬件
仿真模型

OPA381 TINA-TI Reference Design (Rev. B)

SBOM381B.TSC (129 KB) - TINA-TI 参考设计
支持的产品和硬件
仿真模型

OPA381 TINA-TI Spice Model (Rev. B)

SBOM380B.ZIP (7 KB) - TINA-TI Spice 模型
支持的产品和硬件
仿真模型

OPAx381 PSpice Model (Rev. C)

SBOC073C.ZIP (29 KB) - PSpice 模型
支持的产品和硬件
计算工具

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

模拟工程师计算器旨在加快模拟电路设计工程师经常运用的许多重复性计算。该基于 PC 的工具提供图形界面，其中显示各种常见计算列表，从使用反馈电阻器设置运算放大器增益到选择合适的电路设计元件，以稳定模数转换器 (ADC) 驱动器缓冲器电路。

除了可用作独立工具之外，该计算器还能很好地与模拟工程师口袋参考中所述的概念配合使用。

支持的产品和硬件
计算工具

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, (...)
支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
VSON (DRB) 8 Ultra Librarian
VSSOP (DGK) 8 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

订购和质量

推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。

支持和培训

可获得 TI 工程师技术支持的 TI E2E™ 论坛

查看全部论坛主题 查看英文版全部论坛主题

所有内容均由 TI 和社区贡献者按“原样”提供，并不构成 TI 规范。请参阅使用条款。

如果您对质量、包装或订购 TI 产品有疑问，请参阅 TI 支持。​​​​​​​​​​​​​​

视频