Analog Devices Inc. AD9281ARSRL

Description
The AD9281 is a complete dual-channel, 28 MSPS, 8-bit CMOS ADC optimized for applications requiring close matching between two ADCs. It integrates two 8-bit, 28 MSPS ADCs, two input buffer amplifiers, an internal voltage reference, and multiplexed digital output buffers. Each ADC incorporates a simultaneous sampling sample-and-hold amplifier at its input. The analog inputs are buffered, eliminating the need for external input buffer op amps in most applications. The ADCs are implemented using a multistage pipeline architecture that offers accurate performance and guarantees no missing codes. The outputs of the ADCs are ported to a multiplexed digital output buffer.

Features
Dual 8-Bit, 28 MSPS ADC: A pair of high-performance 28 MSPS ADCs optimized for spurious-free dynamic performance are provided for encoding of I and Q or diversity channel information.
Low Power: Complete CMOS Dual ADC function consumes a low 225 mW on a single supply (on 3 V supply). The AD9281 operates on supply voltages from 2.7 V to 5.5 V.
On-Chip Voltage Reference: The AD9281 includes an on-chip compensated bandgap voltage reference pin programmable for 1 V or 2 V.
On-chip analog input buffers eliminate the need for external op amps in most applications.
Single 8-Bit Digital Output Bus: The AD9281 ADC outputs are interleaved onto a single output bus, saving board space and digital pin count.
Small Package: The AD9281 offers the complete integrated function in a compact 28-lead SSOP package.
Product Family: The AD9281 dual ADC is pin compatible with a dual 10-bit ADC (AD9201).

Applications
Communications: I/Q channel encoding, diversity channel encoding
Instrumentation: Data acquisition, signal analysis
Industrial: Process control, measurement and monitoring
Medical: Imaging, patient monitoring