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可编程和可变增益放大器（PGA 和 VGA）

PGA870

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高速全差分可编程增益放大器

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数据表

PGA870

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数据表 立即订购

产品详情

PGA/VGA PGA Number of channels 1 Vs (min) (V) 4.75 Vs (max) (V) 5.25 Input type Differential Output type Differential Interface type Digital Gain Set BW at Acl (MHz) 650 Acl, min spec gain (V/V) 0.27 Voltage gain (min) (V/V) 0.27 Voltage gain (max) (V/V) 10 Gain (max) (dB) 20 Architecture Fully Differential ADC Driver Features Shutdown, Single-ended to Differential conversion Vos (offset voltage at 25°C) (typ) (mV) 5 Input voltage noise (typ) (µV√Hz) 0.03 Slew rate (typ) (V/µs) 2900 Iq per channel (typ) (mA) 143 Rating Catalog Operating temperature range (°C) -40 to 85
PGA/VGA PGA Number of channels 1 Vs (min) (V) 4.75 Vs (max) (V) 5.25 Input type Differential Output type Differential Interface type Digital Gain Set BW at Acl (MHz) 650 Acl, min spec gain (V/V) 0.27 Voltage gain (min) (V/V) 0.27 Voltage gain (max) (V/V) 10 Gain (max) (dB) 20 Architecture Fully Differential ADC Driver Features Shutdown, Single-ended to Differential conversion Vos (offset voltage at 25°C) (typ) (mV) 5 Input voltage noise (typ) (µV√Hz) 0.03 Slew rate (typ) (V/µs) 2900 Iq per channel (typ) (mA) 143 Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RHD) 28 25 mm² (5 mm × 5 mm)
  • Wideband +5-V Operation: 650-MHz Bandwidth
  • Low Impedance, Voltage Mode Output
  • Wide Gain Range: –11.5 dB to +20 dB
  • Precise 0.5-dB Gain Steps
    Step-to-Step Gain Error = ±0.03 dB
  • HD2: –93 dBc at 100 MHz
  • HD3: –88 dBc at 100 MHz
  • IMD3: –98 dBc at 100 MHz, –95 dBc at 200 MHz
  • OIP3: +47 dBm at 100 MHz;
    Exceeds +45 dBm for Frequencies to 300 MHz
  • Flexible Gain Control Interface:
    • Supports latched and unlatched options
    • Gain may be set in power-down state
    • Fast setup and hold times: 2.5 ns
  • Low Disable Current: 2 mA
  • Pb-Free (RoHS-Compliant) and Green Package
  • APPLICATIONS
    • Programmable Gain IF Amplifier:
      • Differential signal chains
      • Single-ended to differential conversion
    • Fast Gain Control Loops for:
      • Test/measurement
      • Digital radio signal chains
    • ADC Driver for Wireless Base Station Signal Chains: GSM, WCDMA, MC-GSM
    • Radar/Ranging Systems

    PowerPAD is a trademark of Texas Instruments.
    All other trademarks are the property of their respective owners.
  • Wideband +5-V Operation: 650-MHz Bandwidth
  • Low Impedance, Voltage Mode Output
  • Wide Gain Range: –11.5 dB to +20 dB
  • Precise 0.5-dB Gain Steps
    Step-to-Step Gain Error = ±0.03 dB
  • HD2: –93 dBc at 100 MHz
  • HD3: –88 dBc at 100 MHz
  • IMD3: –98 dBc at 100 MHz, –95 dBc at 200 MHz
  • OIP3: +47 dBm at 100 MHz;
    Exceeds +45 dBm for Frequencies to 300 MHz
  • Flexible Gain Control Interface:
    • Supports latched and unlatched options
    • Gain may be set in power-down state
    • Fast setup and hold times: 2.5 ns
  • Low Disable Current: 2 mA
  • Pb-Free (RoHS-Compliant) and Green Package
  • APPLICATIONS
    • Programmable Gain IF Amplifier:
      • Differential signal chains
      • Single-ended to differential conversion
    • Fast Gain Control Loops for:
      • Test/measurement
      • Digital radio signal chains
    • ADC Driver for Wireless Base Station Signal Chains: GSM, WCDMA, MC-GSM
    • Radar/Ranging Systems

    PowerPAD is a trademark of Texas Instruments.
    All other trademarks are the property of their respective owners.

The PGA870 is a wideband programmable-gain amplifier (PGA) for high-speed signal chain and data acquisition systems. The PGA870 has been optimized to provide high bandwidth, low distortion, and low noise, making it ideally suited as a 14-bit analog-to-digital converter (ADC) driver for wireless base station signal chain applications. The wide gain range of –11.5 dB to +20 dB can be adjusted in 0.5-dB gain steps through a 6-bit control word applied to the parallel interface. The gain control interface may be configured as a level-triggered latch or an edge-triggered latch, or it may be placed in an unlatched (transparent) mode. In addition to the 6-bit gain control, the PGA870 contains a power-down pin (PD) that can be used to put the device into a low-current, power-down mode. In this mode, the quiescent current drops to 2 mA, but the gain control circuitry remains active, allowing the gain of the PGA870 to be set before device power-up. The PGA870 is offered in a QFN-28 PowerPAD™ package.

The PGA870 is a wideband programmable-gain amplifier (PGA) for high-speed signal chain and data acquisition systems. The PGA870 has been optimized to provide high bandwidth, low distortion, and low noise, making it ideally suited as a 14-bit analog-to-digital converter (ADC) driver for wireless base station signal chain applications. The wide gain range of –11.5 dB to +20 dB can be adjusted in 0.5-dB gain steps through a 6-bit control word applied to the parallel interface. The gain control interface may be configured as a level-triggered latch or an edge-triggered latch, or it may be placed in an unlatched (transparent) mode. In addition to the 6-bit gain control, the PGA870 contains a power-down pin (PD) that can be used to put the device into a low-current, power-down mode. In this mode, the quiescent current drops to 2 mA, but the gain control circuitry remains active, allowing the gain of the PGA870 to be set before device power-up. The PGA870 is offered in a QFN-28 PowerPAD™ package.
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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 High-Speed, Fully Differential, Programmable Gain Amplifier 数据表 (Rev. A) 2011-2-15
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
用户指南 TSW3725 Evaluation Module 2011-10-25

设计与开发

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评估板

PGA870EVM — PGA870 评估模块

PGA870EVM 是 PGA870 宽带可编程增益放大器 (PGA) 的评估模块 (EVM)，适用于高速信号链和数据采集系统。

PGA870EVM 可评估 PGA870 器件的所有方面。用户手册文档中包含了完整的电路描述、原理图和物料清单 (BOM)。

用户指南: PDF
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评估板

TSW3085EVM — 宽带发送信号链评估板和参考设计

TSW3085 评估模块为电路板，可允许系统设计人员借助 LMK04806B（美国国家半导体的正式产品）低噪声时钟发生器/抖动消除器，评估德州仪器 (TI) 发射信号链的总性能。作为易于使用的完整射频发射解决方案，TSW3085EVM 包含用于为 DAC3482 数模转换器 (DAC) 以及 TRF3705 计时的 LMK04806B，可将来自 DAC 的 I/Q 输出向上变频为射频载体。

DAC3482 是双通道、超低功耗 16 位 1.25 GSPS DAC。

TRF3705 是高性能复数射频调制器，输出范围为 300 MHz 至 4 GHz。

LMK04806B (...)

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仿真模型

PGA870 PSpice Model (Rev. A)

SLOM170A.ZIP (80 KB) - PSpice 模型
支持的产品和硬件
仿真模型

PGA870 TINA-TI Reference Design

SLOM168.TSC (115 KB) - TINA-TI 参考设计
支持的产品和硬件
仿真模型

PGA870 TINA-TI Spice Model

SLOM169.ZIP (65 KB) - TINA-TI Spice 模型
支持的产品和硬件
封装 引脚 CAD 符号、封装和 3D 模型
VQFN (RHD) 28 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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