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可编程和可变增益放大器（PGA 和 VGA）

VCA820

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具有 dB 线性可变增益控制放大器的 150MHz BW

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数据表

VCA820

正在供货
数据表 立即订购

产品详情

PGA/VGA VGA Number of channels 1 BW at Acl (MHz) 150 Vs (max) (V) 12 Vs (min) (V) 7 Acl, min spec gain (V/V) 10 Gain (max) (dB) 40 Slew rate (typ) (V/µs) 1700 Operating temperature range (°C) -40 to 85 Features Analog Gain Set, Differential to Single-ended conversion Rating Catalog
PGA/VGA VGA Number of channels 1 BW at Acl (MHz) 150 Vs (max) (V) 12 Vs (min) (V) 7 Acl, min spec gain (V/V) 10 Gain (max) (dB) 40 Slew rate (typ) (V/µs) 1700 Operating temperature range (°C) -40 to 85 Features Analog Gain Set, Differential to Single-ended conversion Rating Catalog
SOIC (D) 14 51.9 mm² 8.65 x 6 VSSOP (DGS) 10 14.7 mm² 3 x 4.9
  • 150-MHz Small-Signal Bandwidth
  • 137-MHz, 5-VPP Bandwidth (G = +10 V/V)
  • 0.1-dB Gain Flatness to 28 MHz
  • 1700-V/µs Slew Rate
  • > 40-dB Gain Adjust Range
  • High Gain Accuracy: 20 dB ±0.4dB
  • High Output Current: 160 mA
  • APPLICATIONS
    • AGC Receivers With RSSI
    • Differential Line Receivers
    • Pulse Amplitude Compensation
    • Variable Attenuators

All other trademarks are the property of their respective owners
  • 150-MHz Small-Signal Bandwidth
  • 137-MHz, 5-VPP Bandwidth (G = +10 V/V)
  • 0.1-dB Gain Flatness to 28 MHz
  • 1700-V/µs Slew Rate
  • > 40-dB Gain Adjust Range
  • High Gain Accuracy: 20 dB ±0.4dB
  • High Output Current: 160 mA
  • APPLICATIONS
    • AGC Receivers With RSSI
    • Differential Line Receivers
    • Pulse Amplitude Compensation
    • Variable Attenuators

All other trademarks are the property of their respective owners

The VCA820 is a dc-coupled, wideband, linear in dB, continuously variable, voltage-controlled gain amplifier. The VCA820 provides a differential input to single-ended conversion with a high-impedance gain control input, used to vary the gain down 40 dB from the nominal maximum gain set by the gain resistor (RG) and feedback resistor (RF).

The VCA820 internal architecture consists of two input buffers and an output current feedback amplifier stage, integrated with a multiplier core to provide a complete variable gain amplifier (VGA) system that does not require external buffering. The maximum gain is set externally with two resistors, providing flexibility in designs. The maximum gain is intended to be set between +2 V/V and +100 V/V. Operating from ±5-V supplies, the gain control voltage for the VCA820 adjusts the gain linearly in dB as the control voltage varies from 0 V to +2 V. For example, set for a maximum gain of +10 V/V, the VCA820 provides 20 dB, at +2-V input, to –20 dB at 0-V input of gain control range. The VCA820 offers excellent gain linearity. For a 20-dB maximum gain, and a gain-control input voltage varying between 1 V and 2 V, the gain does not deviate by more than ±0.4dB (maximum at +25°C).

The VCA820 is a dc-coupled, wideband, linear in dB, continuously variable, voltage-controlled gain amplifier. The VCA820 provides a differential input to single-ended conversion with a high-impedance gain control input, used to vary the gain down 40 dB from the nominal maximum gain set by the gain resistor (RG) and feedback resistor (RF).

The VCA820 internal architecture consists of two input buffers and an output current feedback amplifier stage, integrated with a multiplier core to provide a complete variable gain amplifier (VGA) system that does not require external buffering. The maximum gain is set externally with two resistors, providing flexibility in designs. The maximum gain is intended to be set between +2 V/V and +100 V/V. Operating from ±5-V supplies, the gain control voltage for the VCA820 adjusts the gain linearly in dB as the control voltage varies from 0 V to +2 V. For example, set for a maximum gain of +10 V/V, the VCA820 provides 20 dB, at +2-V input, to –20 dB at 0-V input of gain control range. The VCA820 offers excellent gain linearity. For a 20-dB maximum gain, and a gain-control input voltage varying between 1 V and 2 V, the gain does not deviate by more than ±0.4dB (maximum at +25°C).
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技术文档

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类型 项目标题 下载最新的英语版本 日期
* 数据表 VCA820 Wideband, > 40-dB Adjust Range, Linear in dB Variable Gain Amplifier 数据表 (Rev. D) PDF | HTML 2015年 9月 9日
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 下载英文版本 2018年 1月 31日
应用手册 Implementating a Variable-Length Cat5e Cable Equalizer 2010年 4月 25日
应用手册 Wireline Data Transmission and Reception 2010年 1月 27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

设计和开发

如需其他信息或资源，请查看下方列表，点击标题即可进入详情页面。

评估板

DEM-VCA-MSOP-1A — DEM-VCA-MSOP-1A

用户指南: PDF
TI.com 上无现货
评估板

DEM-VCA-SO-1B — DEM-VCA-SO-1B

用户指南: PDF
TI.com 上无现货
仿真模型

VCA820 PSpice Model (Rev. A)

SBOC288A.ZIP (46 KB) - PSpice Model
下载
仿真模型

VCA820 TINA-TI Reference Design (Rev. B)

SBOC287B.TSC (39 KB) - TINA-TI Reference Design
下载
仿真模型

VCA820 TINA-TI Spice Model (Rev. A)

SBOM314A.ZIP (10 KB) - TINA-TI Spice Model
下载
模拟工具

PSPICE-FOR-TI — 适用于 TI 设计和模拟工具的 PSpice®

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 (...)
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模拟工具

TINA-TI — 基于 SPICE 的模拟仿真程序

TINA-TI 提供了 SPICE 所有的传统直流、瞬态和频域分析以及更多。TINA 具有广泛的后处理功能，允许您按照希望的方式设置结果的格式。虚拟仪器允许您选择输入波形、探针电路节点电压和波形。TINA 的原理图捕获非常直观 - 真正的“快速入门”。

TINA-TI 安装需要大约 500MB。直接安装，如果想卸载也很容易。我们相信您肯定会爱不释手。

TINA 是德州仪器 (TI) 专有的 DesignSoft 产品。该免费版本具有完整的功能，但不支持完整版 TINA 所提供的某些其他功能。

如需获取可用 TINA-TI 模型的完整列表，请参阅：SpiceRack - 完整列表 

需要 HSpice (...)

用户指南: PDF
下载英文版本 (Rev.A): PDF
了解详情
封装 引脚数 下载
SOIC (D) 14 了解详情
VSSOP (DGS) 10 了解详情
应遵守 TI 的评估模块标准条款与条件.

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 认证摘要
  • 持续可靠性监测

支持与培训

视频