参数资料
型号: AT89C51AC2-RLTUM
厂商: Atmel
文件页数: 7/121页
文件大小: 0K
描述: IC 8051 MCU FLASH 32K 44VQFP
产品培训模块: MCU Product Line Introduction
标准包装: 800
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 40MHz
连通性: UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 34
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 1.25K x 8
电压 - 电源 (Vcc/Vdd): 3 V ~ 5.5 V
数据转换器: A/D 8x10b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LQFP
包装: 托盘
产品目录页面: 616 (CN2011-ZH PDF)
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
104
A/T89C51AC2
4127H–8051–02/08
DC Parameters for A/D Converter
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: TAVLL = Time for Address Valid to ALE Low.
TLLPL = Time for ALE Low to PSEN Low.
TA = -40°C to +85°C; VSS = 0V; VCC = 5V ±10%; F = 0 to 40 MHz.
TA = -40°C to +85°C; VSS = 0V; VCC = 5V ± 10%.
(Load Capacitance for port 0, ALE and PSEN = 60 pF; Load Capacitance for all other
outputs = 60 pF.)
Table 78, Table 81 and Table 84 give the description of each AC symbols.
Table 79, Table 83 and Table 85 give for each range the AC parameter.
Table 80, Table 83 and Table 86 give the frequency derating formula of the AC parame-
ter for each speed range description. To calculate each AC symbols: Take the x value
and use this value in the formula.
Example: TLLIV and 20 MHz, Standard clock.
x = 30 ns
T = 50 ns
TCCIV = 4T - x = 170 ns
Table 77. DC Parameters for AD Converter in Precision Conversion
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
Vref
Reference voltage
2.40
3.00
V
Cai
Analog input Capacitance
60
pF
During sampling
Rai
Analog input Resistor
400
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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