參數(shù)資料
型號: T89C51RC2-SLBCL
廠商: Atmel Corp.
英文描述: 8-bit Microcontroller with 16 Kbytes/ 32 Kbytes FLASH
中文描述: 8位微控制器,帶有16字節(jié)/ 32千字節(jié)閃存
文件頁數(shù): 151/170頁
文件大?。?/td> 1927K
代理商: T89C51RC2-SLBCL
151
A/T89C51CC01
4129L–CAN–08/05
DC Parameters for A/D Converter
Table 122.
DC Parameters for AD Converter in Precision Conversion
Notes:
1. Typicals are based on a limited number of samples and are not guaranteed.
2. With ADC enabled.
AC Parameters
Explanation of the AC
Symbols
Each timing symbol has 5 characters. The first character is always a “T” (stands for
time). The other characters, depending on their positions, stand for the name of a signal
or the logical status of that signal. The following is a list of all the characters and what
they stand for.
Example: T
AVLL
= Time for Address Valid to ALE Low.
T
LLPL
= Time for ALE Low to PSEN Low.
T
A
= -40
°
C to +85
°
C; V
SS
= 0V; V
CC
= 5V
±
10%; F = 0 to 40 MHz.
T
A
= -40
°
C to +85
°
C; V
SS
= 0V; V
CC
= 5V
±
10%.
(Load Capacitance for port 0, ALE and PSEN = 60 pF; Load Capacitance for all other
outputs = 60 pF.)
Table 123, Table 126 and Table 129 give the description of each AC symbols.
Table 124, Table 128 and Table 130 give for each range the AC parameter.
Table 125, Table 128 and Table 131 give the frequency derating formula of the AC
parameter for each speed range description. To calculate each AC symbols: Take the x
value and use this value in the formula.
Example: T
LLIV
and 20 MHz, Standard clock.
x = 30 ns
T = 50 ns
T
CCIV
= 4T - x = 170 ns
Symbol
Parameter
Min
Typ
(1)
Max
Unit
Test Conditions
AVin
Analog input voltage
Vss- 0.2
Vref
+ 0.2
V
Rref
(2)
Resistance between Vref and Vss
12
16
24
k
Ω
Varef
Reference voltage
2.40
3.00
V
Cai
Analog input Capacitance
60
pF
During sampling
Rai
Analog input Resistor
400
Ω
During sampling
INL
Integral non linearity
1
2
lsb
DNL
Differential non linearity
0.5
1
lsb
OE
Offset error
-2
2
lsb
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