AT89C51SND1C-ROTIL ATMEL Corporation, AT89C51SND1C-ROTIL Datasheet - Page 40

• Manufacturer Part Number: AT89C51SND1C-ROTIL
• Description: Single-Chip Microcontroller with MP3 Decoder and Man-Machine Interface
• Manufacturer: ATMEL Corporation

Analog to Digital Converter
Definition of Symbols
Characteristics
Waveforms
Figure 26. Analog-to-Digital Converter Internal Waveforms
40
AT8xC51SND1C
ADSST Bit
ADEN Bit
CLK
T
EHSH
Table 52. Analog to Digital Converter Timing Symbol Definitions
Table 53. Analog-to-Digital Converter AC Characteristics
V
Notes:
Symbol
T
T
T
D
I
O
G
LE
DD
CLCL
EHSH
SHSL
LE
SE
E
= 2.7 to 3.3V, T
T
C
E
S
1. A
2. The differential non-linearity is the difference between the actual step width and the
3. The integral non-linearity is the peak difference between the center of the actual step
4. The offset error is the absolute difference between the straight line, which fits the
5. The gain error is the relative difference in percent between the straight line which fits
CLCL
code.
ideal step width (see Figure 27).
and the ideal transfer curve after appropriate adjustment of gain and offset errors
(see Figure 27).
actual transfer curve (after removing of gain error); and the straight line, which fits the
ideal transfer curve (see Figure 27).
the actual transfer curve (after removing of offset error); and the straight line, which
fits the ideal transfer curve (see Figure 27).
V
DD
Signals
= AV
Clock
Enable (ADEN bit)
Start Conversion
(ADSST bit)
Parameter
Clock Period
Start-up Time
Conversion Time
Differential non-
linearity error
Integral non-
linearity error
Offset error
Gain error
A
= 0 to 70°C
REFP
(1)(5)
= 3.0 V, AV
(1)(4)
(1)( 2)
(1)(3)
T
SHSL
SS
= AV
1.43
Min
REFN
= 0 V. ADC is monotonic with no missing
11·T
TBD
TBD
TBD
TBD
Max
H
L
4
CLCL
Conditions
High
Low
4106F–8051–10/02
Unit
LSB
LSB
LSB
µs
µs
µs
%