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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
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擄C to +85擄C.
Applications
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RGB video processing
Digital communications
High-speed instrumentation
Digital Sampling Oscilloscopes (DSO)
Projection display systems
Block Diagram
AGND
DGND
AV
CC
OV
DD
V
IN
+
V
IN
聳
8-Bit
250 MSPS
ADC
CLK
CLK
Data Output Latches
DA
0
聳DA
7
DB
0
聳DB
7
Common Mode
Voltage
Reference
Data Output
Mode Control
2
2
DCLK
OUT
DCLK
OUT
+2.5 V
V
CM
PD
CLK CLK
Reset DMODE
1,2
&
Reset
Rev. 1.0.2 December 2002
next
SPT7722SIT 產(chǎn)品屬性
Fairchild Semiconductor
Differential
1
1
250000 KSPs
8 bit
3-Step Folding
+/- 0.265 V
Parallel
46.1 dB
Internal
5.25 V
4.75 V
550 mW
+ 85 C
- 40 C
TQFP-44
SMD/SMT
425 mW
Yes
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