AN2429 Freescale Semiconductor / Motorola, AN2429 Datasheet - Page 4

• Manufacturer Part Number: AN2429
• Description: Interfacing to the HCS12 ATD Module
• Manufacturer: Freescale Semiconductor / Motorola

AN2429/D
ATD MODULE CLOCK
~
V
1
RL
2
R
AND UPDATE ADR1
s
6 CYCLES
ANALOG
SAMPLE
CONVERT FIRST
INPUT
CHANNEL
V
Freescale Semiconductor, Inc.
SSA
C
f
For More Information On This Product,
ANALOG
ANALOG
PIN1..15
INPUT
INPUT
Switch 1 is closed only for the first, fixed 2 cycles of the sample period.
Switch 2 is closed only for the final, programmable 2/4/8/16 cycles of the sample period.
PIN0
APPROXIMATION
8 CYCLES
SUCCESSIVE
SEQUENCE
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+/- 1 A
16
I
in
PROTECTION
CONVERT SECOND
AND UPDATE ADR2
DIODES
INPUT
CHANNEL
REPEAT SEQUENCE IF SCAN = 1
V
V
DDA
SSA
30
4x CONVERSION SEQUENCE OF MULTIPLE CHANNELS (MULT = 1)
AND UPDATE ADR3
CONVERT THIRD
C
6 pF
8-BIT RESOLUTION, PROGRAMMED SAMPLE SIZE = 4
CHANNEL
in
ANALOG
MUX
C
4 pF
44
BUF
AMPLIFIER
BUFFER
CONVERT FOURTH
AND UPDATE ADR4
+1
CHANNEL
S1
S2
57
V
RL
ATDCLK
CYCLES
C
12 pF
SAMP
DAC
I/P