SPT7871
10-BIT, 100 MSPS TTL A/D CONVERTER
FEATURES
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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 TTL Outputs
Differential ECL Clock Input
APPLICATIONS
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Professional Video
HDTV
Communications
Imaging
Digital Oscilloscopes
GENERAL DESCRIPTION
The SPT7871 is a 10-bit, 100 MSPS analog-to-digital con-
verter, with a two stage subranging 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 TTL 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
SPT7871 is available in a 44L cerquad package in the
industrial temperature range and in die form.
BLOCK DIAGRAM
VEE
AVCC
DVCC
Analog Input
VIN
T/H
D10 (Overrange)
Σ
T/H
8-Bit Folder
ADC
(LSB)
D9 (MSB)
D8
D7
Output
Latches
and
Buffers
(TTL)
D6
D5
D4
D3
3-Bit
Flash
(MSB)
3-Bit
DAC
Error Correction Logic
Internal
+1.0 V Reference
VT
*
Reference
Ladder
D2
D1
D0
VM
*
MINV (CMOS/TTL)
Timing and
Control
LINV (CMOS/TTL)
CLK (ECL)
NCLK (ECL)
VB
*
Internal
-1.0 V Reference
*
Provided for reference decoupling purposes only.
AGND
DGND
CADEKA [ CADEKA MICROCIRCUITS LLC. ]
