FEATURES

HIGH DYNAMIC RANGE:

High SFDR: 83dB at 10MHz fIN

High SNR: 75dB at 10MHz fIN

ON-BOARD TRACK-AND-HOLD:

Differential Inputs

Selectable Full-Scale Input Range

FLEXIBLE CLOCKING:

Differential or Single-Ended

Accepts Sine or Square Wave Clocking Down to

0.5VPP

Variable Threshold Level

APPLICATIONS

COMMUNICATIONS RECEIVERS

TEST INSTRUMENTATION

PROFESSIONAL CCD IMAGING

DESCRIPTION

The ADS5421 is a high-dynamic range 14-bit, 40MHz,

pipelined Analog-to-Digital Converter (ADC). It includes a

high-bandwidth linear track-and-hold amplifier that gives

excellent spurious performance up to and beyond the Nyquist

rate. The clock input can accept a low-level differential sine

wave or square wave signal down to 0.5VPP, further improving

the Signal-to-Noise Ratio (SNR) performance.

The ADS5421 has a 4VPP differential input range

(2VPP ? 2 inputs) for optimum Spurious-Free Dynamic

Range (SFDR). The differential operation gives the lowest

even-order harmonic components. A lower input voltage can

also be selected using the internal references, further

optimizing SFDR.

The ADS5421 is available in a small LQFP-64 package.