
SPT7870
10-BIT, 100 MSPS ECL A/D CONVERTER
GENERAL DESCRIPTION
The SPT7870 is a 10-bit, 100 MSPS analog-to-digital con-
verter, with a two stage sub-ranging flash/folder architecture.
The bipolar, single-ended analog input provides an easy
interface for most applications. Programmable data output
formats provide additional ease of implementation and flex-
ibility. The device supports high-speed ECL- and PECL-level
outputs.
The resolution and performance of this device makes it well
suited for professional video and HDTV applications. The on-
chip track-and-hold provides for excellent AC performance
enabling this device to be a converter of choice for RF
communications and digital sampling oscilloscopes. The
SPT7870 is available in a 44L cerquad package in the
industrial temperature range and in die form.
BLOCK DIAGRAM
NCLK
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Reference
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DAC
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Analog Input
VCC
CLK
8-Bit Folder
Buffers
D4
D3
D2
D1
D0
D9 (MSB)
D8
D7
D6
D5
D10 (Overrange)
MINV
LINV
VEE
AGND
DGND
VIN
VT
*
VM
*
VB
*
*
Provided for reference decoupling purposes only.
FEATURES
10-Bit, 100 MSPS Analog-to-Digital Converter
Monolithic Bipolar
Single-Ended Bipolar Analog Input
-1.0 V to +1.0 V Analog Input Range
Internal Sample-and-Hold
Internal Voltage Reference
Programmable Data Output Formats
Single Ended ECL/PECL Outputs
TTL Version Available as the SPT7871
APPLICATIONS
Professional Video
HDTV
Communications
Imaging
Digital Oscilloscopes
Signal Processing Technologies, Inc.
4755 Forge Road, Colorado Springs, Colorado 80907, USA
Phone: (719) 528-2300 FAX: (719) 528-2370 E-Mail: www.spt.com