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Texas Instruments 德州仪器 OPAx625 高带宽高精度运算放大器

德州仪器 OPAx625 高带宽高精度运算放大器是出色的 16 位和 18 位 SAR ADC 驱动器，具备高精度、低 THD 及低噪声等特性，可提供一套独特的电源可扩展解决方案。这些器件在额定工作条件下的 16 位建立时间为 280ns，可提供真正的 16 位有效位数（ENOB）。这些器件具备高直流精度（偏移电压仅为 100µV）、120MHz 的宽增益带宽积以及 2.5nV/√Hz 的低宽带噪声，并且经优化可驱动高吞吐量、高分辨率的 SAR ADC，例如 ADS88xx 系列 SAR ADC。OPAx625 具有两种工作模式：高驱动模式和低功耗模式。在创新型低功耗模式下，OPAx625 会跟踪输入信号，从而能够在 170ns 内以 16 位 ENOB 从低功耗模式切换至高驱动模式。

Along with a high DC precision of only 100µV offset voltage, a wide gain-bandwidth product of 120MHz, and a low wideband noise of 2.5nV/√Hz, these devices are optimized for driving high-throughput. This makes them ideal for high-resolution SAR ADCs, such as the TI ADS88xx family. Texas Instruments OPA625/OPA2625 features two operating modes: high-drive and low-power. In the innovative low-power mode, they track the input signal. This allows it to transition from low-power mode to high-drive mode at 16-bit ENOB within 170ns.

特性

  • High-Drive Mode
    • 120MHz GBW (G = 100)
    • 115V/µs slew rate
    • 16-Bit Settling at 4V Step: 280ns
    • 2.5nV/vHz at 10kHz low voltage noise
    • 1Ω at 1MHz output impedance
    • ±100µV (max) offset voltage
    • ±3µV/ºC (max) offset voltage drift
    • 2mA (typ) quiescent current
  • Low-Power Mode
    • 1MHz GBW
    • 250µA (typ) quiescent current
  • Power-Scalable Features
    • Ultrafast transition from low-power to high-drive mode: 170ns
  • High AC and DC Precision
    • Low Distortion
      • -122dBc for HD2
      • -140dBc for HD3 at 100kHz
    • Input common-mode range includes negative rail
    • Rail-to-Rail output
    • -40°C to +125°C temperature range

应用

  • Precision SAR ADC drivers
  • Precision voltage reference buffers
  • Programmable logic controllers
  • Test and measurement equipment
  • Power-sensitive data acquisition systems

Evaluation Module

Texas Instruments OPAMPEVM-MSOPTSSOP评估板

一款通用型空白电路板，支持轻松评估表面贴装运算放大器。

Learn More关于Texas Instruments OPAMPEVM-MSOPTSSOP评估板 View Products与Texas Instruments OPAMPEVM-MSOPTSSOP评估板相关

Block Diagram

框图 - Texas Instruments 德州仪器 OPAx625 高带宽高精度运算放大器
发布日期: 2015-06-25 | 更新日期: 2022-03-11