SPT7935
12-BIT, 20 MSPS, 79 mW A/D CONVERTER
FEATURES
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12-Bit, 20 MSPS Analog-to-Digital Converter
Monolithic CMOS
Internal Track-and-Hold
Low Input Capacitance: 1.4 pF
Low Power Dissipation: 79 mW
2.8 – 3.6 V Power Supply Range
TTL-Compatible Outputs
APPLICATIONS
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CCD Imaging Cameras and Sensors
Medical Imaging
RF Communications
Document and Film Scanners
Electro-Optics
Transient Signal Analysis
Handheld Equipment
GENERAL DESCRIPTION
The SPT7935 12-bit, 20 MSPS analog-to-digital converter
has a pipelined converter architecture built in a CMOS
process. It delivers high performance with a typical power
dissipation of only 79 mW. With low distortion and high
dynamic range, this device offers the performance needed
for imaging, multimedia, telecommunications and instrumen-
tation applications.
The SPT7935 is available in a 44-lead Thin Quad Flat Pack
(TQFP) package in the industrial temperature range (–40 to
+85
°C).
BLOCK DIAGRAM
ADC
DAC
+
– G=2
D<1…0> Pipeline Stage
V
IN
+
V
IN
–
V
REF
+
V
REF
–
CLK
Clock
Driver
Digital Delays, Error Correction and Output
12
Stage
1
Stage
2
Stage
9
Stage
10
2-Bit
ADC
Digital Output (D0 – D11)
CADEKA [ CADEKA MICROCIRCUITS LLC. ]
