The AD9873 is a low-cost 3.3 V CMOS Analog Front End Converter for MCNS-DOCSIS, DVB, DAVIC-Compliant Set-Top Box, Cable Modem Applications
The AD9873 is a low-cost 3.3 V CMOS analog front end converter designed for MCNS-DOCSIS, DVB, and DAVIC-compliant set-top box and cable modem applications. It integrates a complete 232 MHz quadrature digital transmitter and a multichannel receiver with four high-performance analog-to-digital converters (ADCs) for various video and digital data signals. A single external crystal controls all internal conversion and data processing cycles.
| Frequency Range (SYSTEM CLOCK, DAC SAMPLING) | 232 MHz |
|---|---|
| Resolution (TxDAC) | 12 Bits |
| Conversion Rate (8-BIT ADC) | 16.5 MHz |
| Conversion Rate (10-BIT ADC) | 33 MHz |
| Conversion Rate (12-BIT ADC) | 33 MHz |
| Input Bandwidth (–3 dB) (12-BIT ADC) | 85 MHz |
| Input Bandwidth (–3 dB) (10-BIT ADC) | 95 MHz |
| Input Bandwidth (–3 dB) (8-BIT ADC) | 90 MHz |
The system clock and DAC sampling frequency range is up to 232 MHz.
The 12-bit ADC has a conversion rate of 33 MHz.
The input voltage range for the 12-bit ADC is 2 V p-p.