參數(shù)資料
型號(hào)： ADUC812BS
廠商： ANALOG DEVICES INC
元件分類： 微控制器/微處理器
英文描述： Circular Connector; No. of Contacts:37; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:25; Circular Contact Gender:Socket; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:25-37
中文描述： 8-BIT, FLASH, 11.0592 MHz, MICROCONTROLLER, PQFP52
封裝： MQFP-52
文件頁數(shù)： 9/31頁
文件大?。?/td> 543K
代理商： ADUC812BS
REV. 0
ADuC812
–
9
–
Table I. ADCCON1 SFR Bit Designations
Bit
Location
Bit
Mnemonic
Description
ADCCON1.7
ADCCON1.6
MD1
MD0
The mode bits (MD1, MD0)
select the active operating mode
of the ADC as follows:
MD1 MD0 Active Mode
0
0
ADC powered down.
0
1
ADC normal mode
1
0
ADC powered down
if not executing a
conversion cycle.
1
1
ADC standby if not
executing a conver-
sion cycle.
ADCCON1.5
ADCCON1.4
CK1
CK0
The ADC clock divide bits (CK1,
CK0) select the divide ratio for
the master clock used to generate
the ADC clock. An ADC con-
version will require 16 ADC
clocks in addition to the selected
number of acquisition clocks (see
AQ0/AQ1 below). The divider
ratio is selected as follows:
CK1
CK0
MCLK Divider
0
0
1
0
1
2
1
0
4
1
1
8
The ADC acquisition select bits
(AQ1, AQ0) select the time avail-
able for the input track/hold
amplifier to acquire the input
signal and is selected as follows:
AQ1
AQ0 #ADC Clks
0
0
1
0
1
2
1
0
3
1
1
4
Note: for analog input source
impedances of <8 k
, the default
AQ0/AQ1 selection of 00, i.e., 1
Acquisition Clock will suffice. For
source impedances greater than
this, it is recommended that you
increase the acquisition clock
selection to 2, 3 or 4 clocks.
The Timer 2 conversion bit (T2C)
is set to enable the Timer 2 over-
flow bit to be used as the ADC
convert start trigger input.
The external trigger enable bit
(EXC) is set to allow the external
Pin 23 (
CONVST
) to be used as
the active low convert start input.
This input should be an active low
pulse (100 ns minimum pulsewidth)
at the required sample rate.
ADCCON1.3
ADCCON1.2
AQ1
AQ0
ADCCON1.1
T2C
ADCCON1.0
EXC
Note: In standby mode the ADC V
REF
circuits are maintained on, while in
powered down mode all ADC peripherals are powered down thus minimizing
current consumption. Typical ADC current consumption is 1.6 mA at V
DD
= 5 V.
provided on-chip. The internal reference may be overdriven via
the external V
REF
pin. This external reference can be in the
range 2.3 V to AV
DD
.
Single step or continuous conversion modes can be initiated in
software or, alternatively, by applying a convert signal to an
external Pin 25 (
CONVST
). Timer 2 can also be configured
to generate a repetitive trigger for ADC conversions. The ADC
may be configured to operate in a DMA Mode whereby the
ADC block continuously converts and captures samples to an
external RAM space without any interaction from the MCU
core. This automatic capture facility can extend through a
16 MByte external Data Memory space.
The ADuC812 is shipped with factory programmed calibration
coefficients that are automatically downloaded to the ADC on
power-up, ensuring optimum ADC performance. The ADC
core contains internal Offset and Gain calibration registers, a
software calibration routine is provided to allow the user to
overwrite the factory programmed calibration coefficients if
required, thus minimizing the impact of endpoint errors in the
users target system.
A voltage output from an on-chip temperature sensor propor-
tional to absolute temperature can also be routed through the
front-end ADC multiplexor (effectively a 9th ADC channel
input) facilitating a temperature sensor implementation.
ADC Transfer Function
The analog input range for the ADC is 0 V to V
REF
. For this
range, the designed code transitions occur midway between
successive integer LSB values (i.e., 1/2 LSB, 3/2 LSBs,
5/2 LSBs . . . FS –3/2 LSBs). The output coding is straight
binary with 1 LSB = FS/4096 or 2.5 V/4096 = 0.61 mV when
V
REF
= 2.5 V. The ideal input/output transfer characteristic for
the 0 to V
REF
range is shown in Figure 4.
OUTPUT
CODE
111...111
111...110
111...101
111...100
000...011
000...010
000...001
000...000
0V
1LSB
+FS
–
1LSB
VOLTAGE INPUT
1LSB =
FS
4096
Figure 4. ADuC812 ADC Transfer Function
SFR Interface to ADC Block
The ADC operation is fully controlled via three SFRs, namely:
ADCCON1 – (ADC Control SFR #1)
The ADCCON1 register controls conversion and acquisition
times, hardware conversion modes and power-down modes as
detailed below.
SFR Address:
SFR Power-On Default Value:
Bit Addressable:
EFH
20H
NO
MD1
MD0
CK1
CK0
AQ1
AQ0
T2C
EXC
相關(guān)PDF資料
PDF描述
ADUC832 MicroConverter, 12-Bit ADCs and DACs with Embedded 62 kBytes Flash MCU
ADUC832BCP MicroConverter, 12-Bit ADCs and DACs with Embedded 62 kBytes Flash MCU
ADUC832BS MicroConverter, 12-Bit ADCs and DACs with Embedded 62 kBytes Flash MCU
ADUC834 MicroConverter, Dual 16-/24- Bit ADCs with Embedded 62KB FLASH MCU
ADUC834BS MicroConverter, Dual 16-/24- Bit ADCs with Embedded 62KB FLASH MCU
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADUC812BS 制造商:Analog Devices 功能描述:12-BIT ADC WITH EMBEDDED
aduc812bs-01 制造商:Analog Devices 功能描述:
ADUC812BS-REEL 制造商:Analog Devices 功能描述:MCU 8-bit ADuC8xx 8052 CISC 8KB Flash 3.3V/5V 52-Pin MQFP T/R
ADUC812BSZ 功能描述:IC ADC 12BIT MULTICH MCU 52-MQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC8xx 標(biāo)準(zhǔn)包裝:250 系列:56F8xxx 核心處理器:56800E 芯體尺寸:16-位 速度:60MHz 連通性:CAN，SCI，SPI 外圍設(shè)備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲(chǔ)器容量:40KB（20K x 16） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:6K x 16 電壓 - 電源 (Vcc/Vdd):2.25 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 6x12b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 125°C 封裝/外殼:48-LQFP 包裝:托盤 配用:MC56F8323EVME-ND - BOARD EVALUATION MC56F8323
ADUC812BSZ-01 制造商:Analog Devices 功能描述:12-BIT ADC WITH EMBEDDED MCU I.C.
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

*
*
*