SPT7920
12-BIT, 10 MSPS, TTL, A/D CONVERTER
FEATURES
• Monolithic
• 12-Bit 10 MSPS Converter
• 66 dB SNR @ 1 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
GENERAL DESCRIPTION
The SPT7920 A/D converter is the industry's first 12-bit
monolithic analog-to-digital converter capable of sample
rates greater than 10 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
Signal Processing Technologies, Inc.
4755 Forge Road, Colorado Springs, Colorado 80907, USA
Phone: (719) 528-2300
FAX: (719) 528-2370
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 SPT7920 also provides a wide input voltage
range of
±2.0 volts.
The SPT7920 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.
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
VIN
BLOCK DIAGRAM
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