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: 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 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 LMH6521▲ Higher Performance, Easier To Use LMH6522▲ Quad DVGA, Higher Performance LMK04000 Precision Clock Conditioner With Dual PLL Typical Application

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

Parameters / Values	LMH6517	LMH6521	LMH6522
Gain Adjust Range	31.5 dB	31.5 dB	31 dB
Signal Channel BW	1200 MHz	1200 MHz	1400 MHz
Supply Min	4.5 Volt	4.75 Volt	4.75 Volt
Supply Max	5.25 Volt	5.25 Volt	5.25 Volt
Gain Control Interface	serial & parallel	5 bit parallel, pulse, SPI	5 bit Parallel or SPI
Supply Current	160 mA	225 mA	465 mA
Voltage Noise	1.1 nV/root(Hz)	33 nV/root(Hz)	30 nV/root(Hz)
HD 2nd	-70 dB	-84 dB	-90 dB
Function	Receiver	Op Amp
Temperature Min	-40 deg C	-40 deg C	-40 deg C
Temperature Max	85 deg C	85 deg C	85 deg C

Datasheets

Title		Size	Date	Other Language
	LMH6517 Low Power, Low Noise IF and Baseband Dual 16 bit ADC Driver With Digitally Controlled Gain	1764 Kbytes	5-Nov-11

Application Notes

Title		Size	Date	Other Language
	AN-1942: Application Note 1942 LMH6517 Evaluation Board	3540 Kbytes	1-Dec-09
	AN-2081: Application Note 2081 LMH6517EVAL-R1 Evaluation Board	3712 Kbytes	5-Nov-11
	AN-2188: Application Note 2188 Between the Amplifier and the ADC: Managing Filter Loss in Communications Systems	174 Kbytes	26-Oct-11

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LMH6517SQ/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty CEAC Asia Pacific 39000 DIGI-KEY Worldwide 0	$6.30 each at 1K+ pcs	reel of 1000
LMH6517SQE/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 250 AVNET-EM Worldwide 250 DIGI-KEY Worldwide 557 MOUSER Worldwide 220 TAYLOR Americas 250	$6.30 each at 1K+ pcs	reel of 250
LMH6517SQX/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$6.30 each at 1K+ pcs	reel of 4500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMH6517.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMH6517 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LMH6517EVAL-R1/NOPB	LMH6517 Digital Controlled Variable Gain Amplifier Evaluation Board (rev1)	Full production Lead Free (RoHS)	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 1	$350.00 each	1
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 LMH6517 DVGA has differential input and differential output. To aid evaluation with 50 ohm, single ended test equipment the LMH6517EVAL-R1 evaluation board is shipped with transformers on both the input and output signal paths. The single ended signal path uses the IN+ and OUT+ marked connectors. The IN- and OUT- signal paths are grounded and the SMA connectors are not installed. Contents: LMH6517EVAL-R1 board AN-2081 - Application Note 2081 LMH6517EVAL-R1 Evaluation Board

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
SP16160CH1RBKIT/NOPB	High-IF Sub-sampling Receiver Subsystem Reference Design	Preliminary Lead Free (RoHS)	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 1	$995.00 each	1
Description: The SP16160CH1RB demonstrates a high-IF sampling receiver subsystem that provides signal amplification, digitization and clocking as used in wireless infrastructure systems. The subsystem includes the ADC16DV160 analog-to-digital converter (ADC), LMH6517 Digitally-controlled Variable-Gain Amplifier (DVGA) and LMK04031B precision clock conditioner. Contents:: SP16160CH1RB reference board (for documentation see: RD-179) ADC14PIC PIC loader board Used for programming the LMK04031B WaveVision 5 installation CD Contains most recent Beta version of WaveVision 5 software (v5.0.5.175) and patch to support SP16160CH1RB This kit requires the Wavevsn Brd 5.1 which must be purchased separately Users Guide Performance Plots

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LMH6517SQ/NOPB	60.581	LLP	32	3	260	Detail	N/A	N/A	NS UZXYTT L6517SQ
LMH6517SQE/NOPB	60.581	LLP	32	3	260	Detail	N/A	N/A	NS UZXYTT L6517SQ
LMH6517SQX/NOPB	60.581	LLP	32	3	260	Detail	N/A	N/A	NS UZXYTT L6517SQ

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMH6517.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMH6517 is located at RoHS Status.

Reference Design

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

CAD Symbols and Models N/A

Models N/A

Software-Defined Radio (SDR) Webinar Click image to play video in new window High IF High Sensitivity Radio Receiver Design Loading video... Communications Infrastructure Overview Loading video... ADC16V130 16-bit, 130 MSPS Reference Subsystem Overview Loading video... RD-179 High-IF Sub-Sampling Receiver Subsystem Overview Loading video... What's New in Signal Path -- November 09 Loading video...

Software-Defined Radio (SDR) Webinar Date: 2010-08-30 Length: 0:28:23 High IF High Sensitivity Radio Receiver Design Date: 2009-10-19 Length: 0:40:03 Communications Infrastructure Overview Date: 2009-08-04 Length: 00:64:17 ADC16V130 16-bit, 130 MSPS Reference Subsystem Overview Date: 2009-06-26 Length: 0:04:54 RD-179 High-IF Sub-Sampling Receiver Subsystem Overview Date: 2009-12-16 Length: 0:04:42 What's New in Signal Path -- November 09 Date: 2009-12-07 Length: 0:08:13