P82C150AFT Philips Semiconductors, P82C150AFT Datasheet - Page 28

• Manufacturer Part Number: P82C150AFT
• Description: CAN Serial Linked I/O device SLIO with digital and analog port functions
• Manufacturer: Philips Semiconductors

Philips Semiconductors
11.6
The application in Fig.16 can be used for analog-to-digital
conversion for only one analog input signal. The
evaluation of ADC were done with the values
R1 = R2 = 100 k and C = 3.3 nF; under these conditions
the ADC may reach an accuracy of 7 to 8 bit (depends on
application). The external components should be
connected close to the port pins P15 and P16 with short
wiring to avoid disturbances at the analog input
port pin P15.
Using the on-chip multiplex function the P82C150 provides
up to six input port pins to convert analog input signals to
digital values (see Fig.17).
The period for one ADC cycle is identical to the length of
one DPM cycle.
1996 Jun 19
handbook, halfpage
CAN Serial Linked I/O device (SLIO) with
digital and analog port functions
one analog input signal
for A/D conversion
Using ADC
Fig.16 ADC implementation.
R2
R1
C
P16
P15
P82C150
MHA076
28
11.7
Figure 18 shows the wide range of analog input
applications:
handbook, halfpage
Comparison of two analog input signals.
Comparison of one analog input signal against a fixed
threshold.
Window comparator including monitoring the
comparator outputs at the port pins P8 and P9;
additional automatically generated messages, when the
corresponding port bits in the Negative Edge and/or
Positive Edge register are set.
Local control two-step system.
Fig.17 Two multiplexed analog input signals
V
V
Using analog input port functions
analog signal
switched for analog-to-digital conversion
(maximum 6 signals; see Fig.5).
t
t
feedback
P5
P6
P15
P16
P14
Preliminary specification
P82C150
P82C150
MHA075
SW3 to
SW1