AD9066,pdf,datasheet (Dual, 6-Bit, 60 MSPS Monlithic A/D Con)

The AD9066 is a dual 6-bit ADC that has been optimized for low cost in-phase and quadrature (I&Q) demodulators. Primary applications include digital direct broadcast satellite applications where broadband quadrature phase shift keying (QPSK) modulation is used. In these receivers the recovered signal is separated into I&Q vector components and digitized.

To reduce total system cost and power dissipation, the AD9066 provides an internal voltage reference and operates from a single +5 volt power supply. Digital outputs are CMOS compatible and rated to 60 MSPS conversion rates. The digital input (ENCODE) utilizes a CMOS input stage with a TTL compatible (1.4 V) threshold.

The AD9066 is housed in a 28-pin SOIC package and available in two temperature grades. The AD9066JR is rated for operation over the 0°C to +70°C commercial temperature range. The AD9066AR is rated for the -40°C to +85°C industrial temperature range.

The internal voltage reference insures that the analog input is biased to midscale with low offset when driven from an ac coupled source. In dc coupled applications, the midscale voltage reference can be used to control external biasing amplifiers to minimize offsets due to variations in temperature or supply voltage.