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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.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | Low Pwr, Low Noise, IF& Basebnd, Dual 16-bit ADC Drvr w/Dig Cntrlld Gain datasheet (Rev. K) | 13 Mar 2013 | |
| E-book | The Signal e-book: A compendium of blog posts on op amp design topics | 28 Mar 2017 | ||
| Application note | AN-1719 Noise Figure Analysis Fully Differential Amplifier (Rev. A) | 01 May 2013 | ||
| Application note | AN-2235 Ckt Brd Design for LMH6517/21/22 & Other H-Sp IF/RF F Amp (Rev. A) | 01 May 2013 | ||
| Application note | Using High Speed Diff Amp to Drive ADCs (Rev. A) | 26 Apr 2013 | ||
| User guide | High-IF Sub-sampling Receiver Subsystem User Guide | 27 Jan 2012 | ||
| Application note | A Walk Along the Signal Path (High-Speed Signal Path) | 30 Mar 2005 |
For additional terms or required resources, click any title below to view the detail page where available.
The LMH6517EVAL evaluation board is designed to aid in the characterization of TI`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 LMH6517 DVGA has (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WQFN (RTV) | 32 | Ultra Librarian |
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TI RF cascade calculator
Overview
The RF Cascade Calculator is a web-based tool for performing RF signal chain (lineup) cascade analysis. It computes cascaded performance parameters across a multi-stage RF signal chain using standard cascade equations (Friis formula for noise figure, reciprocal power sums for IP3/IP2/P1dB, etc.).
The tool is hosted on the TI Developer Gallery and runs entirely in the user's browser — no software download or installation is required.
Features (v1.0.0)
RF Cascade Analysis
Cascade Calculations (Friis and Standard Cascade Equations)
Derived System-Level Results
Interactive Plot
Input Validation
Tooltip Equations
Export