SPT7820

10-BIT, 20 MSPS, TTL OUTPUT, A/D CONVERTER

FEATURES

• Monolithic 20 MSPS Converter

• On-Chip Track/Hold

• Bipolar

±2.0 V Analog Input

• 60 dB SNR @ 1 MHz Input

• Low Power (1.0 W Typical)

• 5 pF Input Capacitance

• TTL Outputs

APPLICATIONS

• Medical Imaging

• Professional Video

• Radar Receivers

• Instrumentation

• Electronic Warfare

• Digital Communications

Analog

Prescaler

10

Digital

Output

Successive Interpolation

Stage i

Successive Interpolation

Stage i+1

Successive Interpolation

Stage N

Analog

Input

4

Coarse

A/D

T/H Amplifier

Bank

GENERAL DESCRIPTION

The SPT7820 A/D converter is a 10-bit monolithic converter

capable of word rates of a minimum of 20 MSPS. On board

track/hold function assures excellent dynamic performance

without the need for external components. Drive require-

ment problems are minimized with an input capacitance of

only 5 pF.

Inputs and outputs are TTL compatible to interface with TTL

logic systems. An overrange output signal is provided to

indicate overflow conditions. Output data format is straight

binary. Power dissipation is very low at only 1.0 watt with

power supply voltages of +5.0 and -5.2 volts. The SPT7820

also provides a wide input voltage swing of

±2.0 volts.

The SPT7820 is available in 28-lead ceramic sidebrazed DIP,

PDIP and SOIC packages over the commercial, industrial

and military temperature ranges. Contact the factory for

availability of die and /883 versions.

BLOCK DIAGRAM