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可编程和可变增益放大器（PGA 和 VGA）

VCA822

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宽带、大于 40dB 增益调节范围、V/V 线性可变增益放大器

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数据表

VCA822

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数据表 立即订购

产品详情

PGA/VGA VGA Number of channels 1 Vs (min) (V) 7 Vs (max) (V) 12 Input type Differential Output type Single-ended Interface type Resistance BW at Acl (MHz) 150 Acl, min spec gain (V/V) 2 Voltage gain (min) (V/V) 100 Voltage gain (max) (V/V) 2 Gain (max) (dB) 40 Architecture Bipolar Features Analog Gain Set, Differential to Single-ended conversion Vos (offset voltage at 25°C) (typ) (mV) 4 Input voltage noise (typ) (µV√Hz) 0.0082 Slew rate (typ) (V/µs) 1700 Iq per channel (typ) (mA) 36.5 Rating Catalog Operating temperature range (°C) -40 to 85
PGA/VGA VGA Number of channels 1 Vs (min) (V) 7 Vs (max) (V) 12 Input type Differential Output type Single-ended Interface type Resistance BW at Acl (MHz) 150 Acl, min spec gain (V/V) 2 Voltage gain (min) (V/V) 100 Voltage gain (max) (V/V) 2 Gain (max) (dB) 40 Architecture Bipolar Features Analog Gain Set, Differential to Single-ended conversion Vos (offset voltage at 25°C) (typ) (mV) 4 Input voltage noise (typ) (µV√Hz) 0.0082 Slew rate (typ) (V/µs) 1700 Iq per channel (typ) (mA) 36.5 Rating Catalog Operating temperature range (°C) -40 to 85
SOIC (D) 14 51.9 mm² (8.65 mm × 6 mm) VSSOP (DGS) 10 14.7 mm² (3 mm × 4.9 mm)
  • 150-MHz Small-Signal Bandwidth
    (G = +10 V/V)
  • 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 ±0.3 dB
  • High Output Current: ±160 mA
  • 150-MHz Small-Signal Bandwidth
    (G = +10 V/V)
  • 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 ±0.3 dB
  • High Output Current: ±160 mA

The VCA822 device is a DC-coupled, wideband, linear in V/V, continuously variable, voltage-controlled gain amplifier. It provides a differential input to single-ended conversion with a high-impedance gain control input used to vary the gain down 40dB from the nominal maximum gain set by the gain resistor (RG) and feedback resistor (RF).

The internal architecture of the VCA822 device 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 VCA822 device adjusts the gain linearly in V/V as the control voltage varies from +1 V to 1 V. For example, set for a maximum gain of +10 V/V, the VCA822 device provides 10 V/V, at
1-V input, to 0.1 V/V at –1 V input of gain control range. The VCA822 device offers excellent gain linearity. For a 20-dB maximum gain and a gain-control input voltage varying between 0 V and 1 V, the gain does not deviate by more than ±0.3 dB (maximum at +25°C).

 

The VCA822 device is a DC-coupled, wideband, linear in V/V, continuously variable, voltage-controlled gain amplifier. It provides a differential input to single-ended conversion with a high-impedance gain control input used to vary the gain down 40dB from the nominal maximum gain set by the gain resistor (RG) and feedback resistor (RF).

The internal architecture of the VCA822 device 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 VCA822 device adjusts the gain linearly in V/V as the control voltage varies from +1 V to 1 V. For example, set for a maximum gain of +10 V/V, the VCA822 device provides 10 V/V, at
1-V input, to 0.1 V/V at –1 V input of gain control range. The VCA822 device offers excellent gain linearity. For a 20-dB maximum gain and a gain-control input voltage varying between 0 V and 1 V, the gain does not deviate by more than ±0.3 dB (maximum at +25°C).

 
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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 VCA822 Wideband, > 40-dB Gain Adjust Range, Linear in V/V Variable Gain Amplifier 数据表 (Rev. D) PDF | HTML 2015-10-29
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
应用手册 Implementating a Variable-Length Cat5e Cable Equalizer 2010-4-25
应用手册 Wireline Data Transmission and Reception 2010-1-27

设计与开发

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评估板

DEM-VCA-MSOP-1A — DEM-VCA-MSOP-1A

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评估板

DEM-VCA-SO-1B — DEM-VCA-SO-1B

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仿真模型

VCA822 PSpice Model (Rev. A)

SBOC290A.ZIP (45 KB) - PSpice 模型
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仿真模型

VCA822 TINA-TI Reference Design (Rev. B)

SBOC289 (13 KB) - TINA-TI 参考设计
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仿真模型

VCA822 TINA-TI Spice Model (Rev. A)

SBOM315 (17 KB) - TINA-TI Spice 模型
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封装 引脚 CAD 符号、封装和 3D 模型
SOIC (D) 14 Ultra Librarian
VSSOP (DGS) 10 Ultra Librarian
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