16-Bit, 80 MSPS A/D Converter

AD10678

Rev. A

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FEATURES

80 MSPS sample rate

80 dBFS signal-to-noise ratio

Transformer-coupled analog input

Single PECL clock source

Digital outputs

True binary format

3.3 V and 5 V CMOS compatible

APPLICATIONS

Low signature radar

Medical imaging

Communications instrumentation

Instrumentation

Antenna array processing

FUNCTIONAL BLOCK DIAGRAM

AD10678

ANALOG

POWER

CLOCK DISTRIBUTION

CIRCUIT

DIGITAL POWER

ENCODE ENCODE

OUTPUT

DATA

BITS

DIGITAL

POST-

PROCES-

SING

AGND

ADC

ADC

ADC

ADC

AGND

DGND

DGND

3.3VE

3.3V

5VA

AIN

AIN

14

14

14

14

DRY

Figure 1.

GENERAL DESCRIPTION

The AD10678 is a 16-bit, high performance, analog-to-digital

converter for applications that demand increased SNR levels.

Exceptional noise performance and a typical signal-to-noise

ratio of 80 dBFS are obtained by digitally postprocessing the

outputs of four ADCs. Only a single analog input and PECL

sampling clock, as well as 3.3 V and 5 V power supplies, are

required.

The AD10678 is assembled using a 0.062" thick laminate board

with three sets of connector interface pads to accommodate

analog and digital isolation. Analog Devices recommends using

this connector from Samtec: FSI-110-03-G-D-AD-K-TR. The

overall card fits a 2.2" × 2.8" PCB specified from 0°C to 70°C.

PRODUCT HIGHLIGHTS

1.

Guaranteed sample rate of 80 MSPS.

2.

Input signal conditioning with optimized noise

performance.

3.

Fully tested and guaranteed performance.