GENERAL DESCRIPTION

The AD9218 is a dual 10-bit monolithic sampling analog-to-digital converter with on-chip track-and-hold circuits. The product is low cost, low power, and is small and easy to use. The AD9218 operates at a 105 MSPS conversion rate with outstanding dynamic performance over its full operating range. Each channel can be operated independently.

The ADC requires only a single 3.0 V (2.7 V to 3.6 V) power supply and a clock for full operation. No external reference or driver components are required for many applications. The digital outputs are TTL/CMOS compatible and a separate output power supply pin supports interfacing with 3.3 V or 2.5 V logic.

The clock input is TTL/CMOS compatible and the 10-bit digital outputs can be operated from 3.0 V (2.5 V to 3.6 V) supplies. User-selectable options offer a combination of power-down modes, digital data formats, and digital data timing schemes. In power-down mode, the digital outputs are driven to a high impedance state.

FEATURES

Dual 10-bit, 40 MSPS, 65 MSPS, 80 MSPS, and 105 MSPS ADC

Low power: 275 mW at 105 MSPS per channel

On-chip reference and track-and-hold

300 MHz analog bandwidth each channel

SNR = 57 dB @ 41 MHz, Encode = 80 MSPS

1 V p-p or 2 V p-p analog input range each channel

3.0 V single-supply operation (2.7 V to 3.6 V)

Power-down mode for single-channel operation

Twos complement or offset binary output mode

Output data alignment mode

Pin compatible with the 8-bit AD9288

–75 dBc crosstalk between channels

APPLICATIONS

Battery-powered instruments

Hand-held scopemeters

Low cost digital oscilloscopes

I and Q communications

Ultrasound equipment