AD9975 is a low-cost, 3.3 V-CMOS, mixed-signal front-end converter for broadband modems. It contains a transmit path interpolation filter and DAC, and a receive path PGA, LPF, and ADC required for a variety of broadband modems.
The AD9975 is a single-supply, broadband modem mixed-signal front-end (MxFE) IC designed for powerline and home phone networking applications. It integrates a transmit path with a 10-bit D/A converter and interpolating low-pass filter, and a receive path with a programmable gain amplifier, low-pass filter, and 10-bit A/D converter. An on-chip PLL clock multiplier provides all required clocks from a single crystal or clock input.
| D/A Converter Resolution | 10-Bit |
|---|---|
| DAC Input Word Rate | 50 MSPS |
| DAC Output Update Rate | 100 MSPS |
| Transmit Bandwidth | 21 MHz |
| A/D Converter Resolution | 10-Bit |
| PGA Gain Range (Serial) | -6 dB to +36 dB |
| PGA Gain Range (Asynchronous) | 0 dB to 48 dB |
| Operating Temperature | -40 °C to +85°C |
| Package Type | 48-Lead LQFP |
The device is intended for powerline networking and home phone networking applications.
The transmit path bandwidth is 21 MHz when sampled at 100 MSPS.
The TxDAC+ uses a digital 2 × interpolation low-pass filter to oversample the transmit data.
The device is available in a space-saving 48-lead LQFP package.