2. Example when latch up easily occurs
a. When analog and digital supplies are from different sources
DVDD
AVDD
10 14
AVDD
9 15
DVDD
+5V
+5V
C6
CXD1172A
AVSS
AVSS
16
DVSS
8
DVSS
DIGITAL IC
b. When analog and digital supplies are from common source
(i)
DVDD
AVDD
+5V
C6
10 14
AVDD
9 15
DVDD
CXD1172A
AVSS
AVSS
16
DVSS
8
DVSS
DIGITAL IC
(ii)
AVDD
DVDD
10 14
AVDD
9 15
DVDD
+5V
CXD1172A
AVSS
AVSS
16
DVSS
8
DVSS
DIGITAL IC
CXD1172AM/AP
–9–