CXD1177Q Просмотр технического описания (PDF) - Sony Semiconductor

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CXD1177Q

8-bit 40MSPS YC 2-channel D/A Converter

Sony Semiconductor 

CXD1177Q

Latch Up Prevention

The CXD1177Q is a CMOS IC which requires latch up precautions. Latch up is mainly generated by the lag in

the voltage rising time of AVDD (Pin 31) and DVDD (Pin 32), when power supply is ON.

1. Correct usage

a. When analog and digital supplies are from different sources

AVDD

DVDD

31

32

AVDD

DVDD

+5V

+5V

C

C

CXD1177Q

DIGITAL IC

AVSS

AVSS

23

DVSS

21

DVSS

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

(i)

DVDD

31

32

AVDD

DVDD

C

+5V

C

CXD1177Q

AVSS

AVSS

23

DVSS

21

DVSS

(ii)

DVDD

DIGITAL IC

+5V

C

AVSS

31

AVDD

32

DVDD

CXD1177Q

C

AVSS

23

DVSS

21

DVSS

—10—

DIGITAL IC

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