SPT7922

12-BIT, 30 MSPS, TTL, A/D CONVERTER

FEATURES

• Monolithic

• 12-Bit 30 MSPS Converter

• 64 dB SNR @ 3.58 MHz Input

• On-Chip Track/Hold

• Bipolar

±2.0 V Analog Input

• Low Power (1.1 W Typical)

• 5 pF Input Capacitance

• TTL Outputs

APPLICATIONS

• Radar Receivers

• Professional Video

• Instrumentation

• Medical Imaging

• Electronic Warfare

• Digital Communications

• Digital Spectrum Analyzers

• Electro-Optics

12

Digital

Output

4

4-Bit Flash

Converter

Analog Gain

Compression

Processor

Track-and-Hold

Amplifiers

Asynchronous

SAR

Error

Correction,

Decoding

and

Output TTL

Drivers

8

Input

Buffer

GENERAL DESCRIPTION

The SPT7922 A/D converter is the industry's first 12-bit

monolithic analog-to-digital converter capable of sample

rates of greater than 30 MSPS. On board input buffer and

track/hold function assures excellent dynamic perfor-

mance without the need for external components. Drive

requirement problems are minimized with an input ca-

pacitance of only 5 pF.

Logic inputs and outputs are TTL. An overrange output

signal is provided to indicate overflow conditions. Output

data format is straight binary. Power dissipation is very low

at only 1.1 watts with power supply voltages of +5.0 and

-5.2 volts. The SPT7922 also provides a wide input voltage

range of

±2.0 volts.

The SPT7922 is available in 32-lead ceramic sidebrazed

DIP and 44-lead cerquad packages over the commercial

temperature range. Consult the factory for availability of

die, military temperature and /883 versions.

BLOCK DIAGRAM