LMH6521 - High Performance Dual DVGA

The LMH6521 contains two high performance, digitally controlled variable gain amplifiers (DVGA).

Both channels of the 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 0.5-dB gain steps over a 31.5-dB range. Serial and parallel programming options are provided. Serial mode programming uses 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 10-V_PPD signal swings on a single 5-V supply. The low impedance output provides maximum flexibility when driving filters or analog to digital converters.

• OIP3 of 48.5 dBm at 200 MHz
• Maximum Voltage Gain of 26 dB
• Gain Range: 31.5 dB with 0.5-dB Step Size
• Channel Gain Matching of ±0.04 dB
• Noise Figure: 7.3 dB at Maximum Gain
• –3-dB Bandwidth of 1200 MHz
• 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 WQFN Package