MC68HC908LK24 MOTOROLA [Motorola, Inc], MC68HC908LK24 Datasheet - Page 339

• Manufacturer Part Number: MC68HC908LK24
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

16.4.6 Monotonicity
MC68HC908LJ24/LK24 — Rev. 2
MOTOROLA
NOTE:
Finally, 8-bit truncation mode will place the eight MSBs in ADC data
register low (ADRL). The two LSBs are dropped. This mode of operation
is used when compatibility with 8-bit ADC designs are required. No
interlocking between ADRH and ADRL is present.
Quantization error is affected when only the most significant eight bits
are used as a result. See
The conversion process is monotonic and has no missing codes.
RESULT
003
002
001
000
8-BIT
Freescale Semiconductor, Inc.
For More Information On This Product,
RESULT
10-BIT
00B
00A
009
008
007
006
005
004
003
002
001
000
Analog-to-Digital Converter (ADC)
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1/2
IDEAL 10-BIT CHARACTERISTIC
WITH QUANTIZATION = ±1/2
Figure 16-3. 8-Bit Truncation Mode Error
1 1/2
IDEAL 8-BIT CHARACTERISTIC
WITH QUANTIZATION = ±1/2
1/2
2 1/2
3 1/2
Figure
4 1/2
5 1/2
1 1/2
6 1/2
16-3.
7 1/2
8 1/2
9 1/2
Analog-to-Digital Converter (ADC)
WHEN TRUNCATION IS USED,
ERROR FROM IDEAL 8-BIT = 3/8 LSB
DUE TO NON-IDEAL QUANTIZATION.
2 1/2
INPUT VOLTAGE
REPRESENTED AS 10-BIT
INPUT VOLTAGE
REPRESENTED AS 8-BIT
Functional Descriptions
10-BIT TRUNCATED
TO 8-BIT RESULT
Data Sheet
339