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Home » NEWEST Products » New by Manufacturer » Texas Instruments » LMH6521 High Performance Dual DVGA - TI
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National Products from Texas Instruments LMH6521 High Performance Dual DVGA

TI LMH6521 High Performance Dual DVGA

Texas Instruments LMH6521 High Performance Dual DVGA contains two high performance, digitally controlled variable gain amplifiers (DVGAs). Both channels of TI LMH6521 have an independent, digitally controlled attenuator followed by a high linearity, differential output amplifier. Each block has been optimized for low distortion and maximum system design flexibility. Each channel has a high speed power down mode. The internal digitally controlled attenuator provides precise 0.5dB gain steps over a 31.5dB range. Serial and parallel programming options are provided. Serial mode programming utilizes the SPI interface. 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 10VPPD signal swings on a single 5V supply. The low impedance output provides maximum flexibility when driving filters or analog-to-digital converters.

Features
  • OIP3 of 48.5 dBm at 200MHz
  • Maximum voltage gain of 26dB
  • Gain range of 31.5 dB with 0.5dB step size
  • Channel Gain Matching of ±0.04dB
  • Noise figure of 7.3dB at maximum gain
  • -3dB bandwidth of 1200MHz
  • Low power dissipation
  • Independent channel power down
  • Three gain control modes:
    • Parallel interface
    • Serial interface (SPI)
    • Pulse mode interface
  • Temperature Range -40°C to +85°C
  • Thermally enhanced, 32-Pin LLP package
Applications
  • Cellular base stations
  • Wideband and narrowband IF sampling receivers
  • Wideband direct conversion
  • Digital pre-distortion
  • ADC driver
Block Diagram
Block Diagram
Channel Matching Error (Ch A — Ch B)
Channel Matching Error (Ch A — Ch B)
  • Texas Instruments