Signal Processing Technologies, Inc.
4755 Forge Road, Colorado Springs, Colorado 80907, USA
Phone: 719-528-2300
Fax: 719-528-2370
Web Site: http://www.spt.com
e-mail: sales@spt.com
SPT7868
10-BIT, 80 MSPS A/D CONVERTER
PRELIMINARY INFORMATION
APPLICATIONS
• High-speed applications where low power dissipation is
required
• Video imaging
• Medical imaging
• Radar receivers
• IR imaging
• Digital communications
FEATURES
• 80 MSPS maximum sample rate
• 9.2 effective number of bits at ƒIN = 15 MHz and
ƒS = 80 MSPS
•2 VP-P full-scale input range
• Differential input 2.5 V common mode
• Internal or external voltage reference
• Common-mode voltage reference output
• +3.3 V / +5 V digital output logic compatibility
• +5 V analog power supply
GENERAL DESCRIPTION
The SPT7868 is a 10-bit, 80 MSPS analog-to-digital con-
verter with low power dissipation at only 627 mW typical at
80 MSPS with a power supply of +5.0 V. The digital outputs
are +3 V or +5 V, and are user selectable. The SPT7868
has incorporated proprietary circuit design and CMOS
processing technologies to achieve its advanced perfor-
mance. Inputs and outputs are TTL/CMOS compatible to
interface with TTL/CMOS logic systems. Output data for-
mat is straight binary.
The SPT7868 is available in a 28-lead SSOP package
over the industrial temperature range.
BLOCK DIAGRAM
Bias
Cell
VCM
VDD GND
10-BIT
80 MSPS
ADC
THA
VIN
Data
Output
Latches
& Buffers
10
10
GND OVDD
Bandgap
Reference
2
CLK, CLK
VIN
REFH
REFL
Sleep
1
OR
EXT/INT
D0D9
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