參數(shù)資料
型號(hào)： ADUC7020
廠商： Analog Devices, Inc.
英文描述： Precision Analog Microcontroller 12-bit Analog I/O, ARM7TDMI MCU
中文描述： 精密模擬微控制器的12位模擬I / O，ARM7TDMI的微控制器
文件頁(yè)數(shù)： 30/80頁(yè)
文件大?。?/td> 840K
代理商： ADUC7020
ADuC702x Series
Preliminary Technical Data
ratio are critical, the analog input should be driven from a low
impedance source. Large source impedances will significantly
affect the AC performance of the ADC. This may necessitate
the use of an input buffer amplifier. The choice of the op amp
will be a function of the particular application.
Rev. PrB | Page 30 of 80
D
C1
D
AV
DD
R1
C2
D
C1
D
AV
DD
R1
C2
Figure 15: Equivalent Analog Input Circuit
Conversion Phase: Switches Open
Track Phase: Switches Closed
When no amplifier is used to drive the analog input, the source
impedance should be limited to values lower than 1 k
maximum source impedance will depend on the amount of
total harmonic distortion (THD) that can be tolerated. The
THD will increase as the source impedance increases and the
performance will degrade.
. The
DRIVING THE ANALOG INPUTS
Internal or external reference can be used for the ADC. In
differential mode of operation, there are restrictions on
common mode input signal (V
CM
) that are dependant on
reference value and supply voltage used to ensure that the signal
remains within the supply rails. Table 10 gives some calculated
V
CM
min V
CM
max for some conditions.
Table 10: V
CM
ranges
V
CM
min
AVDD
VREF
V
CM
max
Signal
Peak-Peak
2.5V
2.048V
1.25
2.5V
2.048V
1.25
2.5V
2.048V
1.25
2.5V
2.048V
1.25
1.25V
2.05V
1.024V
2.276V
3.3V
0.75V
2.55V
1.25V
1.75V
1.024V
1.976V
3.0V
0.75V
2.25V
ADC CALIBRATION
System calibration or device calibration are performed in
software. Two 10-bit registers are available for calibration,
ADCOF and ADCGN.
For offset error correction, either an external pin must be tied to
AGND (system calibration) or the internal AGND channel
must be selected (device calibration). A software loop must be
implemented to tweak the value in ADCOF register each time
until the transition of ADCDAT reads code 0 to 1. Offset error
correction is done digitally and has a resolution of 0.25 lsb and
a range of +/- 3.125% of VREF.
For gain error correction, either an external pin must be tied to
VREF (system calibration) or the internal reference channel
must be selected (device calibration). A software loop must be
implemented to tweak the value in ADCGN register each time
until the transition of ADCDAT reads code 4094 to 4095.
Similar to the offset calibration, the gain calibration resolution
is 0.25 lsb with a range of +/- 3% of VREF.
TEMPERATURE SENSOR
The ADuC702x provides a voltage output from an on-chip
bandgap reference proportional to absolute temperature. It can
also be routed through the front end ADC multiplexer
(effectively an additional ADC channel input) facilitating an
internal
temperature
sensor
temperature to an accuracy of
±
3
°
C.
BANDGAP REFERENCE
channel,
measuring
die
The ADuC702x provides an on-chip bandgap reference of 2.5V,
which can be used for the ADC and for the DAC. This internal
reference also appears on the V
REF
pin. When using the internal
reference, a capacitor of 0.47
μ
F must be connected from the
external V
REF
pin to AGND, to ensure stability and fast response
during ADC conversions. This reference can also be connected
to an external pin (VREF) and used as a reference for other
circuits in the system. An external buffer would be required
because of the low drive capability of the VREF output. A
programmable option also allows an external reference input on
the V
REF
pin.
The bandgap reference interface consists on a 8-bit MMR,
REFCON described in
Table 11
.
相關(guān)PDF資料
PDF描述
ADUC702 5 AMP MINIATURE POWER RELAY
ADUC814ARU-REEL7 Circular Connector; MIL SPEC:MIL-DTL-38999 Series I; Body Material:Metal; Series:LJT; No. of Contacts:37; Connector Shell Size:25; Connecting Termination:Crimp; Circular Shell Style:Jam Nut Receptacle; Body Style:Straight RoHS Compliant: No
ADUC814BRU Circular Connector; MIL SPEC:MIL-DTL-38999 Series I; Body Material:Metal; Series:LJT; No. of Contacts:37; Connector Shell Size:25; Connecting Termination:Crimp; Circular Shell Style:Jam Nut Receptacle; Body Style:Straight RoHS Compliant: No
ADUC814BRU-REEL Circular Connector; No. of Contacts:56; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:25; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:25-4
ADUC814BRU-REEL7 Circular Connector; No. of Contacts:61; Series:LJT07R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:25; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:25-61
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADUC7020BCP62 制造商:Analog Devices 功能描述:FLASH ARM7+5-CH,12-B ADC & 4X12-B DAC IC - Trays
ADUC7020BCP62-U1 制造商:Analog Devices 功能描述:FLASH ARM7+5-CH,12-B ADC & 4X12-B DAC IC - Trays
ADUC7020BCPZ62 功能描述:IC MCU FLSH 62K ANLG I/O 40LFCSP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC7xxx 標(biāo)準(zhǔn)包裝:60 系列:PSOC® 3 CY8C38xx 核心處理器:8051 芯體尺寸:8-位 速度:67MHz 連通性:EBI/EMI，I²C，LIN，SPI，UART/USART 外圍設(shè)備:電容感應(yīng)，DMA，LCD，POR，PWM，WDT 輸入/輸出數(shù):25 程序存儲(chǔ)器容量:64KB（64K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:2K x 8 RAM 容量:8K x 8 電壓 - 電源 (Vcc/Vdd):1.71 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 2x20b，D/A 4x8b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:48-VFQFN 裸露焊盤 包裝:托盤
ADUC7020BCPZ62I 功能描述:IC MCU FLSH 62K ANLG I/O 40LFCSP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC7xxx 標(biāo)準(zhǔn)包裝:60 系列:PSOC® 3 CY8C38xx 核心處理器:8051 芯體尺寸:8-位 速度:67MHz 連通性:EBI/EMI，I²C，LIN，SPI，UART/USART 外圍設(shè)備:電容感應(yīng)，DMA，LCD，POR，PWM，WDT 輸入/輸出數(shù):25 程序存儲(chǔ)器容量:64KB（64K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:2K x 8 RAM 容量:8K x 8 電壓 - 電源 (Vcc/Vdd):1.71 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 2x20b，D/A 4x8b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:48-VFQFN 裸露焊盤 包裝:托盤
ADUC7020BCPZ62I-RL 功能描述:IC MCU 12BIT 1MSPS I2C 40-LFCSP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC7xxx 標(biāo)準(zhǔn)包裝:38 系列:Encore!® XP® 核心處理器:eZ8 芯體尺寸:8-位 速度:5MHz 連通性:IrDA，UART/USART 外圍設(shè)備:欠壓檢測(cè)/復(fù)位，LED，POR，PWM，WDT 輸入/輸出數(shù):16 程序存儲(chǔ)器容量:4KB（4K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- RAM 容量:1K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 3.6 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 105°C 封裝/外殼:20-SOIC（0.295"，7.50mm 寬） 包裝:管件 其它名稱:269-4116Z8F0413SH005EG-ND
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)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(gòu)。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(gòu)。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(gòu)

我的聯(lián)系方式

*
*
*