FEATURES

· Single +3.3V Supply

· High SNR: 70.7dBFS at fIN = 5MHz

· Total Power Dissipation:

Internal Reference: 321mW

External Reference: 285mW

· Internal or External Reference

· Low DNL: ±0.3LSB

· Flexible Input Range: 1.5V PP to 2VPP

· TQFP-64 Package

APPLICATIONS

· Communications IF Processing

· Communications Base Stations

· Test Equipment

· Medical Imaging

· Video Digitizing

· CCD Digitizing

DESCRIPTION

The ADS5231 is a dual, high-speed, high dynamic

range, 12-bit pipelined analog-to-digital converter

(ADC). This converter includes a high-bandwidth

sample-and-hold amplifier that gives excellent spurious performance up to and beyond the Nyquist

rate. The differential nature of the sample-and-hold

amplifier and ADC circuitry minimizes even-order

harmonics and gives excellent common-mode noise

immunity.

The ADS5231 provides for setting the full-scale

range of the converter without any external reference

circuitry. The internal reference can be disabled,

allowing low-drive, external references to be used for

improved tracking in multichannel systems.

The ADS5231 provides an over-range indicator flag

to indicate an input signal that exceeds the full-scale

input range of the converter. This flag can be used to

reduce the gain of front-end gain control circuitry.

There is also an output enable pin to allow for

multiplexing and testing on a printed circuit board

(PCB).

The ADS5231 employs digital error correction

techniques to provide excellent differential linearity

for demanding imaging applications. The ADS5231 is

available in a TQFP-64 package.