GENERAL DESCRIPTION

The AD9248 is a dual, 3 V, 14- bit, 20/40/65 MSPS analog - to digital converter. It features dual high performance sample- and hold amplifiers and an integrated vol tage reference. The AD9248 uses a multistage differential pipelined architecture with output error correction logic to provide 14- bit accuracy

and guarantee no missing codes over the full operating temperature range at up to 65 MSPS data rates. The wide bandwidth, differential SHA allows for a variety of user selectable input ranges and offsets including single - ended applications. It is suitable for various applications including multiplexed systems that switch full- scale voltage levels in successive chann els and for sampling inputs at frequencies well

beyond the Nyquist rate.

FEATURES

Integrated Dual 14-Bit A -to-D Converters

Single 3 V Supply Operation (2.7 V to 3.6 V)

SNR = 73 dBc (to Nyquist, AD9248-65)

SFDR = 83 dBc (to Nyquist, AD9248-65)

Low Power: 600 mW at 65 MSPS

Differential Input with 500 MHz 3 dB Bandwidth

Exceptional Cross Talk Immunity > 85dB

Flexible Analog Input: 1 V p-p to 2 V p-p Range

Offset Binary or Twos Complement Data Format

Clock Duty Cycle Stabilizer

APPLICATIONS

Ultrasound Equipment

IF Sampling in Communications Receivers:

IS-95, CDMA One, IMT-2000

Battery -Powered Instruments

Hand-Held Scopemeters

Low Cost Digital Oscilloscopes