AD9066

Two Matched ADCs on Single Chip
CMOS-Compatible I/O
Low-Power (400 mW) Dissipation
Single +5 V Supply
On-Chip Voltage Reference
Self-Biased for AC-Coupled Inputs
28-Lead SOIC and SSOP Packages

The AD9066 is a dual 6-bit ADC that has been optimized for low-cost in-phase and quadrature (I and 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 and 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 com-patible and rated to 60 MSPS conversion rates. The digital input (ENCODE) utilizes a CMOS input stage with a TTL compatible (1.4V) threshold.The AD9066 is housed in a 28-lead SOIC and a 28-lead SSOP package and is available in two temperature grades. The AD9066JR is rated for operation over the 0°C to 70°C commer-cial temperature range.The AD9066AR/ARS is rated for the40°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.