LMH6517
- Accurate, 0.5dB Gain Steps
- 200Ω Resistive, Differential Input
- Low Impedance, Differential Output
- Disable Function for Each Channel
- Parallel Gain Control
- SPI Compatible Serial Bus
- Two Wire, Pulse Mode Control
- On Chip Register Stores Gain Setting
- Low Sensitivity of Linearity and Phase to Gain Setting
- Single 5V Supply Voltage
- Small Footprint WQFN Package
Key Specifications
- OIP3: 43dBm @ 200MHz
- Noise figure 5.5dB
- Gain step size of 0.5dB
- Gain step accuracy: 0.05dB
- Frequency Range of 1200 MHz
- Supply current 80mA per channel
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The LMH6517 contains two high performance, digitally controlled variable gain amplifiers (DVGA). It has been designed for use in narrowband and broadband IF sampling applications. Typically the LMH6517 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 LMH6517 has an independent, digitally controlled attenuator and a high linearity, differential output amplifier. Each block has been optimized for low distortion and maximum system design flexibility. Each channel can be individually disabled for power savings.
The LMH6517 digitally controlled attenuator provides precise 0.5dB gain steps over a 31.5dB range. On chip digital latches are provided for local storage of the gain setting. Both serial and parallel programming options are provided. A Pulse mode is also offered where simple up or down commands can change the gain one step at a time.
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 filters or analog to digital converters.
The LMH6517 operates over the industrial temperature range of −40°C to +85°C. The LMH6517 is available in a 32-Pin, thermally enhanced, WQFN package.
技术文档
| 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 | Low Pwr, Low Noise, IF& Basebnd, Dual 16-bit ADC Drvr w/Dig Cntrlld Gain 数据表 (Rev. K) | 2013-3-13 | |||
| 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 | AN-1719 Noise Figure Analysis Fully Differential Amplifier (Rev. A) | 2013-5-1 | ||||
| 应用手册 | AN-2235 Ckt Brd Design for LMH6517/21/22 & Other H-Sp IF/RF F Amp (Rev. A) | 2013-5-1 | ||||
| 应用手册 | Using High Speed Diff Amp to Drive ADCs (Rev. A) | 2013-4-26 | ||||
| 用户指南 | High-IF Sub-sampling Receiver Subsystem User Guide | 2012-1-27 | ||||
| 应用手册 | 基于LMH6517的高性能DVGA设计 | 2012-1-13 | ||||
| 应用手册 | A Walk Along the Signal Path (High-Speed Signal Path) | 2005-3-30 |
设计与开发
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LMH6517EVAL-R1 — LMH6517 数字控制、可变增益放大器评估板
The LMH6517EVAL evaluation board is designed to aid in the characterization of National Semiconductor`s High Speed LMH6517 Digital Controlled Variable Gain Amplifier. Use the evaluation board as a guide for high frequency layout and as a tool to aid in device testing and characterization.
The (...)
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| WQFN (RTV) | 32 | Ultra Librarian |
订购和质量
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