Amplifier is suitable for cable set top boxes, cable modems, xDSL modems and xDSL central office line cards. The AD8372 is a dual, digitally controlled, variable gain amplifier that provides precise gain control, high IP3, and low noise figure. The excellent distortion performance and moderate signal bandwidth make the AD8372 a suitable gain control device for a variety of multichannel receiver applications.
For wide input dynamic range applications, the AD8372 provides a broad 41 dB gain range. The gain is programmed through a bidirectional 4-pin serial interface. The serial inter-face consists of a clock, latch, data input, and data output lines for each channel.
The AD8372 is powered on by applying the appropriate logic level to the ENB1, ENB2 pins. When powered down, the AD8372 consumes less than 2.6 mA and offers excellent input-to-output isolation. The gain setting is preserved when powered down.
- Dual independent digitally controlled VGA
- Differential input and output
- 7.8 dB noise figure
- 41 dB gain range
- Serial 8-bit bidirectional SPI control interface
- Wide input dynamic range
- Pin-programmable output stage
- Power-down feature
- Single 5 V supply
- Applicable in
- Differential ADC drivers
- CMTS upstream direct sampling receivers
- CATV modem signal scaling
- Generic RF/IF gain stages
- Single-ended-to-differential conversion
