CXD2300Q データシートの表示（PDF） - Sony Semiconductor

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CXD2300Q

8-bit 18MSPS Video A/D Converter with 3.3V Power Supply Operation Function

Sony Semiconductor 

Analog input

Vi (1)

Vi (2)

Vi (3)

CXD2300Q

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)

Timing Chart 3

Out (0)

Out (1)

Operation (See Block Diagram and Timing Chart 3)

1. The CXD2300Q 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).

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