參數(shù)資料
型號(hào)： MC68L11F1CFNE3
廠商： Freescale Semiconductor
文件頁數(shù)： 32/158頁
文件大?。?/td> 0K
描述： IC MCU 8BIT 3MHZ 68-PLCC
標(biāo)準(zhǔn)包裝： 18
系列： HC11
核心處理器： HC11
芯體尺寸： 8-位
速度： 3MHz
連通性： SCI，SPI
外圍設(shè)備： POR，WDT
輸入/輸出數(shù)： 30
程序存儲(chǔ)器類型： ROMless
EEPROM 大?。?/td> 512 x 8
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 3 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x8b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 68-LCC（J 形引線）
包裝： 管件
ANALOG-TO-DIGITAL CONVERTER
TECHNICAL DATA
10-3
Figure 10-2 Electrical Model of an A/D Input Pin (Sample Mode)
10.1.2 Analog Converter
Conversion of an analog input selected by the multiplexer occurs in this block. It con-
tains a digital-to-analog capacitor (DAC) array, a comparator, and a successive ap-
proximation register (SAR). Each conversion is a sequence of eight comparison
operations, beginning with the most significant bit (MSB). Each comparison deter-
mines the value of a bit in the successive approximation register.
The DAC array performs two functions. It acts as a sample and hold circuit during the
entire conversion sequence, and provides comparison voltage to the comparator dur-
ing each successive comparison.
The result of each successive comparison is stored in the SAR. When a conversion
sequence is complete, the contents of the SAR are transferred to the appropriate re-
sult register.
A charge pump provides switching voltage to the gates of analog switches in the mul-
tiplexer. Charge pump output must stabilize between 7 and 8 volts, thus a delay of up
to 100
s must be imposed after setting ADPU before the converter can be used. The
charge pump is enabled by the ADPU bit in the OPTION register.
Power is provided to the A/D converter system through the AVDD and AVSS pins.
10.1.3 Digital Control
All A/D converter operations are controlled by bits in register ADCTL. In addition to se-
lecting the analog input to be converted, ADCTL bits indicate conversion status, and
control whether single or continuous conversions are performed. Finally, the ADCTL
bits determine whether conversions are performed on single or multiple channels.
10.1.4 Result Registers
Four 8-bit registers (ADR1–ADR4) store conversion results. Each of these registers
can be accessed by the processor in the CPU. The conversion complete flag (CCF)
DAC
CAPACITANCE
VRL
ANALOG
INPUT
PIN
~ 20 pF
+ ~ 20 V
–
~ 0.7 V
< 2 pF
INPUT
PROTECTION
DEVICE
400 nA
JUNCTION
LEAKAGE
DIFFUSION AND
POLY COUPLER
≤ 4 k
* This analog switch is closed only during the 12-cycle sample time.
*
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相關(guān)PDF資料
PDF描述
VE-B1B-CU-F3 CONVERTER MOD DC/DC 95V 200W
MC68L11E1FNE2 IC MCU 8BIT 2MHZ 52-PLCC
VE-B1B-CU-F2 CONVERTER MOD DC/DC 95V 200W
MC68L11E1CFNE2 IC MCU 8BIT 2MHZ 52-PLCC
VE-B1B-CU-F1 CONVERTER MOD DC/DC 95V 200W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68L11K1FN2R2 制造商:Motorola Inc 功能描述:
MC68L11K1FUE2 功能描述:8位微控制器 -MCU 8B MCU L-VOLTAGE-EPP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
MC68L711E9FN2 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68L711E9FNE2 功能描述:8位微控制器 -MCU 8B MCU LO VOLTAGE RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
MC68L711E9FU2 制造商:Rochester Electronics LLC 功能描述: 制造商:Freescale Semiconductor 功能描述:
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*