GENERAL DESCRIPTION

The AD9244 is a monolithic, single 5 V supply, 14-bit, 40 MSPS/65 MSPS ADC with an on-chip, high performance sample-and-hold amplifier (SHA) and voltage reference. The AD9244 uses a multistage differential pipelined architec ture with output error correction logic to provide 14-bit accuracy at 40 MSPS/65 MSPS data rates, and guarantees no missing codes over the full operating temperature range. The AD9244 has an on-board, programmable voltage reference.

An external reference can also be used to suit the dc accuracy and temperature drift requirements of the application.

A differential or single-ended clock input controls all internal conversion cycles. The digital output data can be presented in straight binary or in twos complement format. An out-of-range (OTR) signal indicates an overflow condition that can be used with the most significant bit to determine low or high overflow.

Fabricated on an advanced CMOS process, the AD9244 is available in a 48-lead LQFP and is specified for operation over the industrial temperature range (–40°C to +85°C).

FEATURES

14-bit, 40 MSPS/65 MSPS ADC

Low power

550 mW at 65 MSPS

300 mW at 40 MSPS

On-chip reference and sample-and-hold

750 MHz analog input bandwidth

SNR > 73 dBc to Nyquist @ 65 MSPS

SFDR > 86 dBc to Nyquist @ 65 MSPS

Differential nonlinearity error = ±0.7 LSB

Guaranteed no missing codes over full temperature range

1 V to 2 V p-p differential full-scale analog input range

Single 5 V analog supply, 3.3 V/5 V driver supply

Out-of-range indicator

Straight binary or twos complement output data

Clock duty cycle stabilizer

Output-enable function

48-lead LQFP package

APPLICATIONS

Communication subsystems (microcell, picocell)

Medical and high-end imaging equipment

Test and measurement equipment