mc68hc11ea9 Freescale Semiconductor, Inc, mc68hc11ea9 Datasheet - Page 55

• Manufacturer Part Number: mc68hc11ea9
• Description: 8-bit Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

MC68HC11EA9
MC68HC11EA9TS/D
E CLOCK
*
THIS ANALOG SWITCH IS CLOSED ONLY DURING THE 12-CYCLE SAMPLE TIME.
0
AND UPDATE ADR1
CONVERT FIRST
ANALOG
INPUT
PIN
CHANNEL
SAMPLE ANALOG INPUT
Figure 16 Electrical Model of an A/D Input Pin (Sample Mode)
12 E CYCLES
< 2 pF
Freescale Semiconductor, Inc.
32
PROTECTION
For More Information On This Product,
DEVICE
INPUT
CONVERT SECOND
Figure 15 A/D Conversion Sequence
AND UPDATE ADR2
CHANNEL
Go to: www.freescale.com
+ ~20 V
– ~0.7 V
CYCLES
MSB
4
SUCCESSIVE APPROXIMATION SEQUENCE
64
BIT 6
CYC
2
AND UPDATE ADR3
CONVERT THIRD
DIFFUSION AND
POLY COUPLER
BIT 5
CYC
CHANNEL
JUNCTION
2
LEAKAGE
< 4 KΩ
400 nA
BIT 4
CYC
2
BIT 3
CYC
2
96
BIT 2
CYC
2
*
~20 pF
CONVERT FOURTH
AND UPDATE ADR4
BIT 1
CYC
CHANNEL
2
CAPACITANCE
CYC
LSB
V RL
2
DAC
END
CYC
EA9 A/D CONVERSION TIM
EA9 ANALOG INPUT PIN
2
128
CYCLES
E
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