GENERAL DESCRIPTION

The AD9284 is a dual 8-bit, monolithic sampling, analog-to-digital converter (ADC) that supports simultaneous operation and is optimized for low cost, low power, and ease of use. Each ADC operates at up to a 250 MSPS conversion rate with outstanding dynamic performance.

The ADC requires a single 1.8 V supply and an encode clock for full performance operation. No external reference components are required for many applications. The digital outputs are LVDS compatible.

The AD9284 is available in a Pb-free, 48-lead LFCSP that is specified over the industrial temperature range of −40°C to +85°C.

FEATURES

Single 1.8 V supply operation

SNR: 49.3 dBFS at 200 MHz input at 250 MSPS

SFDR: 65 dBc at 200 MHz input at 250 MSPS

Low power: 314 mW at 250 MSPS

On-chip reference and track-and-hold

1.2 V p-p analog input range for each channel

Differential input with 500 MHz bandwidth

LVDS-compliant digital output

DNL: ±0.2 LSB

Serial port control options

Offset binary, Gray code, or twos complement data format

Optional clock duty cycle stabilizer

Built-in selectable digital test pattern generation

Pin-programmable power-down function

Available in 48-lead LFCSP

APPLICATIONS

Communications

Diversity radio systems

I/Q demodulation systems

Battery-powered instruments

Handheld scope meters

Low cost digital oscilloscopes

OTS: video over fiber