具有低噪声前置放大器的 8 通道、超低功耗可变增益放大器

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参数

PGA/VGA VGA Number of channels (#) 8 BW @ Acl (MHz) 55 Vs (Max) (V) 3.47 Vs (Min) (V) 3.14 Acl, min spec gain (V/V) 10 Gain (Max) (dB) 51 Operating temperature range (C) -40 to 85 open-in-new 查找其它 可编程变量增益放大器 (PGA/VGA)

封装|引脚|尺寸

VQFN (RGC) 64 81 mm² 9 x 9 open-in-new 查找其它 可编程变量增益放大器 (PGA/VGA)

特性

  • Ultralow Power: 65mW/Channel
  • Low Noise: 0.8nV/Hz
  • Low-Noise Pre-Amp (LNP):
    • 20dB Fixed Gain
    • 250mVPP Linear Input Range
  • Variable Gain Amplifier:
    • Gain Control Range: 46dB
    • Selectable PGA Gain:
      20dB, 25dB, 27dB, 30dB
    • Fast Overload Recovery
    • Output Clamping Control
  • Integrated Low-Pass Filter:
    • Second-Order, Linear Phase
    • Bandwidth: 10MHz, 15MHz
  • High Accuracy:
    • Low Gain Error: ±0.5dB
    • Excellent Channel Matching: ±0.25dB
  • Distortion, HD2: -50dBc at 5MHz
  • Integrated CW Switch Matrix:
    • Easy Current Summing
  • Serial Control Interface
  • Small Package: QFN-64, 9×9mm

PowerPAD Is a trademark of Texas Instruments.

Infineon is a registered trademark of Infineon Technologies.

SPI is a trademark of Motorola.

All other trademarks are the property of their respective owners

open-in-new 查找其它 可编程变量增益放大器 (PGA/VGA)

描述

The VCA8500 is an 8-channel variable gain amplifier consisting of a low-noise pre-amplifier (LNP) and a variable-gain amplifier (VGA). This combination, along with the device features, makes it ideal for a variety of ultrasound systems.

The LNP gain is fixed at 20dB, and has excellent noise and signal handling characteristics. The gain of the voltage-controlled attenuator can vary over a 46dB range with a 0V to 1.2V control voltage common to all channels of the VCA8500.

The post-gain amplifier (PGA) can be programmed for four gain settings: 20dB, 25dB, 27dB, or 30dB gain. As a means to improve system overload recovery time, the VCA8500 provides an internal clamping function. The PGA settings as well the clamp levels are controlled through the serial interface.

The VCA8500 is built on TI's BiCOM process and is available in a small QFN-64 PowerPAD package.

open-in-new 查找其它 可编程变量增益放大器 (PGA/VGA)
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技术文档

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类型 标题 下载最新的英文版本 日期
* 数据表 8-Channel, Ultra-Low Power Variable Gain Amplifier with Low-Noise Pre-Amp 数据表 2008年 3月 19日
用户指南 VCA8500BOARD 2013年 1月 25日
应用手册 所选封装材料的热学和电学性质 2008年 10月 16日

设计与开发

有关其他条款或所需资源,请点击下面的任何链接来查看详情页面。

硬件开发

评估板 下载
说明

Special Note: Customers looking to evaluate the ADS528x, should order a ADS528xEVM, a ADSDESER-50EVM, and a ADSDESER-50EVM Adapter Card.

The ADS5281EVM provides a platform for evaluating the eight-channel ADS5281 analog-to-digital converter (ADC) under various signal, reference, and supply (...)

特性
  • Evaluation board for ADS5281
  • Can generate various signal, reference, and supply conditions
  • Provides 8 analog inputs to the ADC
  • Provides serial LVDS digital outputs
  • Can directly connect to TSW1200 to get parallel CMOS data output
  • Provides extensive software support for control and measurement
  • Multiple (...)
评估板 下载
说明

Special Note: Customers looking to evaluate the ADS528x, should order a ADS528xEVM, a ADSDESER-50EVM, and a ADSDESER-50EVM Adapter Card.

The ADS5282EVM provides a platform for evaluating the eight-channel ADS5282 analog-to-digital converter (ADC) under various signal, reference, and supply (...)

特性
  • Evaluation board for ADS5282
  • Can generate various signal, reference, and supply conditions
  • Provides 8 analog inputs to the ADC
  • Provides serial LVDS digital outputs
  • Can directly connect to TSW1200 to get parallel CMOS data output
  • Provides extensive software support for control and measurement
  • Multiple (...)
评估板 下载
说明

Special Note: Customers looking to evaluate the ADS528x, should order a ADS528xEVM, a ADSDESER-50EVM, and a ADSDESER-50EVM Adapter Card.

The ADS5287EVM provides a platform for evaluating the eight-channel ADS5287 analog-to-digital converter (ADC) under various signal, reference, and supply (...)

特性
  • Evaluation board for ADS5287
  • Can generate various signal, reference, and supply conditions
  • Provides 8 analog inputs to the ADC
  • Provides serial LVDS digital outputs
  • Can directly connect to TSW1200 to get parallel CMOS data output
  • Provides extensive software support for control and measurement
  • Multiple (...)
评估板 下载
document-generic 用户指南
149
说明

The VCA8500BOARD is designed to provide ease of use in evaluating the performance of the VCA8500, an 8 channel ultra-low power variable gain amplifier with low noise pre-amp. The development board operates in three modes: Stand-Alone, PC-Control, and Direct-Control. Stand-Alone mode uses an (...)

特性

The features are as follow:

  • Easy testing of the VCA8500
  • Single-ended input
  • Three modes of operation:
    • Stand-Alone
    • PC-Control
    • Direct-Control

软件开发

支持软件 下载
SLOC101.ZIP (2905 KB)

设计工具和仿真

仿真模型 下载
SBOM773.TSC (50 KB) - TINA-TI Reference Design
仿真模型 下载
SBOM774.ZIP (7 KB) - TINA-TI Spice Model
仿真模型 下载
SLOM161.ZIP (35 KB) - PSpice Model
仿真工具 下载
PSPICE® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI 可提供帮助评估模拟电路功能的设计和仿真环境。此功能齐全的设计和仿真套件使用 Cadence® 的模拟分析引擎。PSpice for TI 可免费使用,包括业内超大的模型库之一,涵盖我们的模拟和电源产品系列以及精选的模拟行为模型。

借助 PSpice for TI 的设计和仿真环境及其内置的模型库,您可对复杂的混合信号设计进行仿真。创建完整的终端设备设计和原型解决方案,然后再进行布局和制造,可缩短产品上市时间并降低开发成本。 

在 PSpice for TI 设计和仿真工具中,您可以搜索 TI 器件、了解产品系列、打开测试台并对您的设计进行仿真,从而进一步分析选定的器件。您还可对多个 TI 器件进行联合仿真,以更好地展现您的系统。

除了一个完整的预加载模型库之外,您还可以在 PSPICE-FOR-TI 工具中轻松访问 TI 器件的全新技术资料。在您确认找到适合您应用的器件后,可访问 TI store 购买产品。 

借助 PSpice for TI,您可使用合适的工具来满足您在整个设计周期(从电路探索到设计开发和验证)的仿真需求。免费获取、轻松入门。立即下载 PSpice 设计和仿真套件,开始您的设计。

入门

  1. 申请使用 PSPICE-FOR-TI 仿真器
  2. 下载并安装
  3. 观看有关仿真入门的培训
特性
  • 利用 Cadence PSpice 技术
  • 带有一套数字模型的预装库可在最坏情形下进行时序分析
  • 动态更新确保您可以使用全新的器件型号
  • 针对仿真速度进行了优化,且不会降低精度
  • 支持对多个产品进行同步分析
  • 基于 OrCAD Capture 框架,提供对业界广泛使用的原理图捕获和仿真环境的访问权限
  • 可离线使用
  • 在各种工作条件和器件容许范围内验证设计,包括
    • 自动测量和后处理
    • Monte Carlo 分析
    • 最坏情形分析
    • 热分析
仿真工具 下载
document-generic 用户指南 document-generic 下载英文版本 (Rev.A)

CAD/CAE 符号

封装 引脚 下载
VQFN (RGC) 64 了解详情

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