ATA6602-PLQW ATMEL [ATMEL Corporation], ATA6602-PLQW Datasheet - Page 270
ATA6602-PLQW
Manufacturer Part Number
ATA6602-PLQW
Description
Microcontroller with LIN Transceiver, 5V Regulator and Watchdog
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATA6602-PLQW.pdf
(362 pages)
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4.21.5.2
270
ATA6602/ATA6603
Analog Noise Canceling Techniques
Figure 4-107. Analog Input Circuitry
Digital circuitry inside and outside the device generates EMI which might affect the accuracy of
analog measurements. If conversion accuracy is critical, the noise level can be reduced by
applying the following techniques:
a. Keep analog signal paths as short as possible. Make sure analog tracks run over
b. The AV
c. Use the ADC noise canceler function to reduce induced noise from the CPU.
d. If any ADC [3..0] port pins are used as digital outputs, it is essential that these do
the analog ground plane, and keep them well away from high-speed switching digi-
tal tracks.
via an LC network as shown in
not switch while a conversion is in progress. However, using the 2-wire Interface
(ADC4 and ADC5) will only affect the conversion on ADC4 and ADC5 and not the
other ADC channels.
ADCn
CC
pin on the device should be connected to the digital V
I
IH
I
IL
Figure 4-108 on page
1..100 kW
271.
C
S/H
= 14 pF
CC
supply voltage
V
CC
4921C–AUTO–01/07
/2
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