Philips PM2521 Service Manual page 124

132
OQ0064
V-l
CONVERTOR
(ADC)
Specification of inputs and outputs
Pin no.
1
Name
PROT
n.c.
D1
Description
Protection input,
no connection
Drain input
for device
1
.
Range
a
conversion
resistor (input sensitivity 0,1V).
Source input for device
1
.
Range b conversion
resistor (input sensitivity IV).
Current output.
Current output
Range b conversion
resistor (input sensitivity IV).
Source input
for
device
2.
Range
a
conversion
resistor (input sensitivity 0,1V).
Drain input
for device 2.
Negative supply
voltage.
Current input.
Current
setting resistor.
Adjustmen
Current reference output.
Tc
setting resistor.
Rp determ
no connection
no connection
Positive
supply
voltage,
no connection.
Supply Zero
^
Range
selecting input
(a
or b). Sin So
Range
selecting reference input. 0
1
Adjustment
reference current.
Rp
determines temperature coefficient.
Sin So Ra
Rb
Sensitivity
ADC
0
1
X
0,1V
1 1
X IV