CXD1175AP 데이터 시트보기 (PDF) - Sony Semiconductor

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CXD1175AP

8-bit 20MSPS Video A/D Converter (CMOS)

Sony Semiconductor 

Timing Chart 3

Analog input

CXD1175AM/AP

Vi (1)

Vi (2)

Vi (3)

Vi (4)

External clock

Upper comparators block

Upper data

S (1) C (1) S (2) C (2) S (3) C (3) S (4) C (4)

MD (0)

MD (1)

MD (2)

MD (3)

Lower reference voltage

RV (0)

RV (1)

RV (2)

RV (3)

Lower comparators A block

Lower data A

S (1)

H (1)

LD (–1)

C (1) S (3)

H (3)

LD (1)

C (3)

Lower comparators B block

Lower data B

H (0)

C (0) S (2)

LD (–2)

H (2)

LD (0)

C (2) S (4)

H (4)

LD (2)

Digital output

Out (–2)

Out (–1)

Out (0)

Out (1)

Operation (See Block Diagram and Timing Chart)

1. The CXD1175AM/AP is a 2-step parallel system A/D converter featuring a 4-bit upper comparators group

and 2 lower comparators groups of 4-bit each. The reference voltage that is equal to the voltage between

VRT – VRB/16 is constantly applied to the upper 4-bit comparator block. Voltage that corresponded to the

upper data is fed through the reference supply to the lower data. VRTS and VRBS pins serve for the self

generation of VRT (Reference voltage top) and VRB (Reference voltage bottom).

–8–

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