SPT7935 Datasheet, PDF (1/8 Pages) Fairchild Semiconductor – 12-BIT, 20 MSPS, 79 mW A/D CONVERTER

SPT7935
12-BIT, 20 MSPS, 79 mW A/D CONVERTER
FEATURES
APPLICATIONS
• 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
• 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
Stage
1
Stage
2
Stage
9
Stage
10
2-Bit
ADC
Digital Delays, Error Correction and Output
12
Digital Output (D0 – D11)