www.cadeka.com
TMC1175A
Video A/D Converter
8 bit, 40 Msps
Features
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8-Bit resolution
40 Msps conversion rate
Low power: 100mW at 20 Msps
Integral track/hold
Integral and differential linearity error 0.5 LSB
Single or dual +5 Volt supplies
Differential phase 0.5 degree
Differential gain 1.5%
Three-state TTL/CMOS-compatible outputs
Low cost
Description
The TMC1175A analog-to-digital (A/D) converter employs
a two-step flash architecture to convert analog signals into
8-bit digital words at sample rates of up to 40 Msps
(Megasamples per second). An integral Track/Hold circuit
delivers excellent performance on signals with full-scale fre-
quency components up to 12 MHz. Innovative architecture
and submicron CMOS technology limit typical power dissi-
pation to 100 mW.
Power may be derived from either single or dual +5V
supplies. Internal voltage reference resistors allow self-bias
operation. Input capacitance is very low, simplifying or
eliminating input driving amplifiers. All digital three-state
outputs are TTL- and CMOS-compatible.
The TMC1175A is available in 24-lead plastic SOIC, and
28-lead J-lead PLCC packages. Performance specifications
are guaranteed from -20°C to 75°C.
Applications
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Video digitizing
VGA and CCD digitizing
LCD projection panels
Image scanners
Personal computer video boards
Multimedia systems
Low cost, high speed data conversion
Block Diagram
Coarse
Quantizer
V
IN
Track/
Hold
VR+
R
T
R
B
VR–
Reference
Matrix
Digital
Error-
Corrector
D
7-0
Fine
Quantizer
CONV
OE
24453A
REV. 1.3.3 2/28/02
CADEKA [ CADEKA MICROCIRCUITS LLC. ]
