Texas Instruments 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 10VPPDsignal swings on a single 5V supply. The low impedance output provides maximum flexibility when driving filters or analog-to-digital converters.