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参数

2nd harmonic (dBc) 78 3rd harmonic (dBc) 75 @ MHz 200 Acl, min spec gain (V/V) 0.5 Approx. price (US$) 8.15 | 1ku Architecture VGA, Fully Differential ADC Driver BW @ Acl (MHz) 1400 Gain (Max) (dB) 25.74 Gain (Min) (dB) -4.3 Step size (dB) 0.2 Iq per channel (Typ) (mA) 116 Number of channels (#) 4 Operating temperature range (C) -40 to 85 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.25 Total supply voltage (Min) (+5V=5, +/-5V=10) 4.75 Vs (Min) (V) 4.75 Vs (Max) (V) 5.25 open-in-new 查找其它 射频 VGA

封装|引脚|尺寸

WQFN (NJY) 54 55 mm² 10 x 5.5 open-in-new 查找其它 射频 VGA

特性

  • OIP3: 49dBm at 200MHz
  • Noise Figure: 8.5dB
  • Voltage Gain: 26dB
  • 1dB Gain Steps
  • Enable pins active in SPI mode
  • −3dB bandwidth of 1400 MHz
  • Gain Step Accuracy: 0.2 dB
  • Disable function for each channel
  • Parallel and Serial gain control
  • Low Power Mode for power management flexibility
  • Small footprint LLP package
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描述

The LMH6523 contains four, high performance, digitally controlled variable gain amplifiers (DVGA). It has been designed for use in narrowband and broadband IF sampling applications. Typically, the LMH6523 drives a high performance ADC in a broad range of mixed signal and digital communication applications such as mobile radio and cellular base stations where automatic gain control (AGC) is required to increase system dynamic range.

Each channel of LMH6523 has an independent, digitally controlled attenuator and a high linearity, differential output, amplifier. All circuitry has been optimized for low distortion and maximum system design flexibility. Power consumption is managed by a three-state enable pin. Individual channels can be disabled or placed into a Low Power Mode or a higher performance, High Power Mode. The enable pin is active in both serial and parallel modes for systems that require high speed power control.

The LMH6523 digitally controlled attenuator provides precise 1dB gain steps over a 31dB range. The digital attenuator can be controlled by either a SPI Serial bus or a high speed parallel bus.

The output amplifier has a differential output, allowing large signal swings on a single 5V supply. The low impedance output provides maximum flexibility when driving a wide range filter designs or analog to digital converters. For applications which have very large changes in signal level LMH6523 can support up to 62dB of gain range by cascading channels.

The LMH6523 operates over the industrial temperature range of −40°C to 85°C. The LMH6523 is available in a 54-Pin, thermally enhanced, LLP package.

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技术文档

= 特色
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类型 标题 下载最新的英文版本 发布
* 数据表 LMH6523 High Performance Quad DVGA 数据表 2012年 10月 24日
解决方案指南 The Signal e-book: A compendium of blog posts on op amp design topics. 下载英文版本 2018年 1月 31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
document-generic 用户指南
$499.00
说明
LMH6522EVAL 评估板旨在为 LMH6522 四路数字控制可变增益放大器 (DVGA) 的测试和测量提供便利。该板配置为 50 欧姆单端信号路径,用于标准实验室设备。LMH6522EVAL 板提供开关控制的增益配置,可以连接外部微控制器进行 SPI 控制。
特性
  • 4 通道
  • 并行和串行控制选项
  • 50 欧姆单端信号路径
  • 仅需一个 5V 工作台电源
  • 支持全差动信号路径操作,返工率极低

设计工具和仿真

仿真模型 下载
SNOJ008A.ZIP (50 KB) - Spice Model
仿真模型 下载
SNOM337.TSC (2539 KB) - TINA-TI Reference Design
仿真模型 下载
SNOM338.ZIP (11 KB) - TINA-TI Spice Model

CAD/CAE 符号

封装 引脚 下载
WQFN (NJY) 54 视图选项

订购与质量

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