Philips pm2521 - Page 121

8.3.
OQ
CIRCUITS
OQ0060
SWITCHING
PART
OF
THE
ADC
10
12
Specification of inputs and outputs
Pin nr. Name
Description
1
Vss
Supply
B
CLOCK Clock
output
H
nc
no connection
H
clock clock
input
H
clock
clock input
H
C comp
Capacitor for compensation
GND
Ground
8
n.c. no connection
9
,
n.c.
no connection
IQ
I
A!
Current input
11 n.c.
no
connection
12 1
-Al
Current input
13
Vdd
Supply
14 n.c.
no connection
15 DATA
Data output
16
n.c. no connection
127
Negative
supply
voltage
Capacitor compensates internal active parts
Supply
zero
^
Input
from
V"!
convortor
Input from V-l convertor
Positive
supply voltage
Outgoing
data
with
a duty-cycle depending on input voltage
of
the
ADC