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The LMH6522 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 LMH6522 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 LMH6522 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 LMH6522 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 LMH6522 can support up to 62dB of gain range by cascading channels.
The LMH6522 operates over the industrial temperature range of −40°C to +85°C. The LMH6522 is available in a 54-Pin, thermally enhanced, WQFN package.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LMH6522 High Performance Quad DVGA datasheet (Rev. D) | 18 Mar 2013 | |
| E-book | The Signal e-book: A compendium of blog posts on op amp design topics | 28 Mar 2017 | ||
| Application note | AN-1718 Differential Amplifier Applications Up to 400 MHz (Rev. B) | 01 May 2013 | ||
| Application note | AN-1719 Noise Figure Analysis Fully Differential Amplifier (Rev. A) | 01 May 2013 | ||
| EVM User's guide | AN-2072 LMH6522 Evaluation Board (Rev. B) | 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 | Between the Amplifier and ADC: Managing Filter Loss in Communications Systems (Rev. B) | 26 Apr 2013 | ||
| Application note | Using High Speed Diff Amp to Drive ADCs (Rev. A) | 26 Apr 2013 | ||
| More literature | Featured High Speed Differential Amplifiers | 23 Oct 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.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WQFN (NJY) | 54 | Ultra Librarian |
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