CXD1172 데이터 시트보기 (PDF) - Sony Semiconductor

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CXD1172

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

Sony Semiconductor 

CXD1172AM/AP

Latch Up Prevention

The CXD1172A is a CMOS IC which requires latch up precautions. Latch up is mainly generated by the lag in

the voltage rising time of AVDD (Pins 10 and 14) and DVDD (Pins 9 and 15), when power supply is ON.

1. Correct usage

a. When analog and digital supplies are from different sources

AVDD

DVDD

10 14

9 15

AVDD

DVDD

+5V

+5V

C6

C14

CXD1172A

DIGITAL IC

AVSS

AVSS

16

DVSS

8

DVSS

b. When analog and digital supplies are from a common source

(i)

DVDD

10 14

9 15

AVDD

DVDD

+5V

C6

C14

CXD1172A

AVSS

AVSS

16

DVSS

8

DVSS

DIGITAL IC

(ii)

DVDD

+5V

C6

AVSS

10 14

9 15

AVDD

DVDD

C14

CXD1172A

AVSS

16

DVSS

8

DVSS

–8–

DIGITAL IC

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