LMH6521

高性能双路 DVGA

The 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-VPPD signal swings on a single 5-V supply. The low impedance output provides maximum flexibility when driving filters or analog to digital converters.

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OIP3 of 48.5 dBm at 200 MHz

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Maximum Voltage Gain of 26 dB

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Gain Range: 31.5 dB with 0.5-dB Step Size

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Channel Gain Matching of ±0.04 dB

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Noise Figure: 7.3 dB at Maximum Gain

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–3-dB Bandwidth of 1200 MHz

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Low Power Dissipation

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Independent Channel Power Down

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Three Gain Control Modes:

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Parallel Interface

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Serial Interface SPI

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Pulse Mode Interface

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Temperature Range: –40°C to +85°C

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Thermally-Enhanced, 32-Pin WQFN Package