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SPT7721 Datasheet, PDF (1/11 Pages) Fairchild Semiconductor – 8-BIT, 250 MSPS ADC WITH DEMUXED OUTPUTS | |||
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SPT7721
8-BIT, 250 MSPS ADC WITH DEMUXED OUTPUTS
FEATURES
⢠TTL/CMOS/PECL compatible
⢠High conversion rate: 250 MSPS
⢠Single +5 V power supply
⢠Very low power dissipation: 310 mW
⢠Power-down mode
⢠+3.0 V/+5.0 V (LVCMOS) digital output logic
compatibility
⢠Demuxed output ports
TECHNICAL DATA
NOVEMBER 8, 2001
APPLICATIONS
⢠RGB video processing
⢠Digital communications
⢠High-speed instrumentation
⢠Projection display systems
GENERAL DESCRIPTION
The SPT7721 is a high-speed, 8-bit analog-to-digital con-
verter implemented in an advanced BiCMOS process. An
advanced folding and interpolating architecture provides
both a high conversion rate and very low power dissipation
of only 310 mW. The analog inputs can be operated in
either single-ended or differential input mode. A 2.5 V com-
mon mode reference is provided on chip for the single-
ended input mode to minimize external components.
The SPT7721 digital outputs are demuxed (double-wide)
with both dual-channel and single-channel selectable out-
put modes. Demuxed mode supports either parallel
aligned or interleaved data output. The output logic is both
+3.0 V and +5.0 V compatible. The SPT7721 is available in
a 44-lead TQFP surface mount package over the industrial
temperature range of â40 to +85 °C.
BLOCK DIAGRAM AGND DGND
AVCC
OVDD
VIN+
8-Bit
250 MSPS
VINÂ
ADC
CLK CLK
Common Mode
Voltage
Reference
Data Output
Mode Control
+2.5 V
VCM
2
2
PD CLK CLK Reset DMODE1,2
&
Reset
DA0ÂDA7
DB0ÂDB7
DCLKOUT
DCLKOUT
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