mc68hc916y3 Freescale Semiconductor, Inc, mc68hc916y3 Datasheet - Page 228
mc68hc916y3
Manufacturer Part Number
mc68hc916y3
Description
Mc68hc16y3 16 Bit Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC916Y3.pdf
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10.8.5 Analog Input Considerations
10-20
MOTOROLA
Another method for minimizing the impact of stress conditions on the ADC is to stra-
tegically allocate ADC inputs so that the lower accuracy inputs are adjacent to the in-
puts most likely to see stress conditions.
Finally, suitable source impedances should be selected to meet design goals and min-
imize the effect of stress conditions.
The source impedance of the analog signal to be measured and any intermediate
filtering should be considered whether external multiplexing is used or not. Figure 10-
9 shows the connection of eight typical analog signal sources to one ADC analog input
pin through a separate multiplexer chip. Also, an example of an analog signal source
connected directly to a ADC analog input channel is displayed.
Figure 10-8 Voltage LImiting Diodes in a Negative Stress Circuit
EXTERNAL VOLTAGE
Freescale Semiconductor, Inc.
For More Information On This Product,
ANALOG-TO-DIGITAL CONVERTER
Go to: www.freescale.com
kR
VDD
VSS
R
TO DEVICE
MC68HC16Y3/916Y3
USER’S MANUAL
ADC NEG STRESS CONN
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