SPT7722 Datasheet, PDF (1/12 Pages) Fairchild Semiconductor – 8-bit, 250 MSPS A/D Converter with Demuxed Outputs

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SPT7722
8-bit, 250 MSPS A/D Converter with Demuxed Outputs
Features
• TTL/CMOS/PECL input logic compatible
• High conversion rate: 250 MSPS
• Single +5V power supply
• Very low power dissipation: 425mW
• 350 MHz full power bandwidth
• Power-down mode: 24mW
• +3.0V/+5.0V (LVCMOS) digital output logic compatibility
• Single/demuxed output ports selectable
• Improved replacement for AD9054
Applications
• RGB video processing
• Digital communications
• High-speed instrumentation
• Digital Sampling Oscilloscopes (DSO)
• Projection display systems
Block Diagram
Description
The SPT7722 is a high-speed, 8-bit analog-to-digital converter
implemented in an advanced BiCMOS process. It is a
performance-enhanced version of the SPT7721, offering
better linearity and dynamic performance. An advanced folding
and interpolating architecture provides both a high conversion
rate and very low power dissipation of only 425mW. The
analog inputs can be operated in either single-ended or
differential input mode. A 2.5V common mode reference is
provided on chip for the single-ended input mode to minimize
external components.
The SPT7722 digital outputs are demuxed (double-wide) with
both dual-channel and single-channel selectable output
modes. Demuxed mode supports either parallel aligned or
interleaved data output. The output logic is both +3.0V and
+5.0V compatible. The SPT7722 is available in a 44-lead
TQFP surface mount package over the industrial temperature
range of -40°C to +85°C.
AGND DGND
AV_CC
OV_DD
V_IN+
8-Bit
250 MSPS
V_IN–
ADC
CLK CLK
Common Mode
Voltage
Reference
Data Output
Mode Control
+2.5 V
V_CM
2
2
PD CLK CLK Reset DMODE_1,2
&
Reset
DA₀–DA₇
DB₀–DB₇
DCLK_OUT
DCLK_OUT
Rev. 1.0.2 December 2002