Features • 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 LLP package Description 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, LLP package. Key Specification • OIP3: 44dBm @ 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 Applications • Cellular base stations • IF sampling receivers • Instrumentation • Modems • Imaging

Also Recommended ADC16DV160 High-performance Dual 16-bit, 160-MSPS ADC ADC16V130 16-Bit, 130 MSPS A/D Converter To Complete Signal Path LMK04000 Precision Clock Conditioner With Dual PLL Typical Application MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image Typical Application	Block Diagram click for larger image Differential LC Input Matching
Typical Performance click for larger image Frequency Response 2dB Steps 120 Ohm Load with Cap

Datasheet

Title		Size	Date	Other Language
	LMH6517 Low Power, Low Noise, IF and Baseband, Dual 16 bit ADC Driver With Digitally Controlled Gain	1374 Kbytes	14-Oct-09

Featured Application Notes

Title		Size	Date	Other Language
	AN-1942: Application Note 1942 LMH6517 Evaluation Board	3261 Kbytes	28-Oct-09

More Application Notes

Title		Size	Date	Other Language
	AN-1580: Application Note 1580 LMH6515EL Digital Controlled, Variable Gain Amplifier Evaluation Board	2238 Kbytes	31-Oct-07	日本語
	AN-1828: Application Note 1828 LMH6514 Digital Controlled Variable Gain Amplifier Evaluation Board	2238 Kbytes	8-Apr-08
	AN-1906: Application Note 1906 LMH6518 Evaluation Board	965 Kbytes	23-Oct-08
	AN-1718: Application Note 1718 Differential Amplifier Applications Up to 400 MHz	154 Kbytes	14-Nov-07	日本語 中文

Design Tools

Reference Design

RD-179 - High-IF Sub-sampling Receiver Subsystem