CXD1178Q View Datasheet(PDF) - Sony Semiconductor

Part Name

Description

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CXD1178Q

8-bit 40MSPS RGB 3-channel D/A Converter

Sony Semiconductor 

CXD1178Q

Latch Up Prevention

The CXD1178Q is a CMOS IC which required latch up precautions. Latch up is mainly generated by the lag in

the voltage rising time of AVDD (Pins 43 to 46) and DVDD (Pins 47 and 48), when power supply is ON.

1. Correct usage

a. When analog and digital supplies are from different sources

AVDD

DVDD

43 44 45 46

AVDD

47 48

DVDD

+5V

+5V

C

CXD1178Q

C

DIGITAL IC

AVSS

AVSS

33

DVSS

30 31

DVSS

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

(i)

DVDD

43 44 45 46

AVDD

47 48

DVDD

+5V

C

CXD1178Q

C

AVSS

AVSS

33

DVSS

30 31

DVSS

(ii)

DVDD

DIGITAL IC

43 44 45 46

AVDD

47 48

DVDD

+5V

C

CXD1178Q

C

AVSS

AVSS

33

DVSS

30 31

DVSS

—12—

DIGITAL IC

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