- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄12018 > ADUC832BSZ (Analog Devices Inc)IC ADC/DAC 12BIT W/MCU 52MQFP PDF資料下載
參數(shù)資料
| 型號： | ADUC832BSZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 35/92頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC/DAC 12BIT W/MCU 52MQFP |
| 產(chǎn)品培訓模塊： | Process Control |
| 標準包裝： | 1 |
| 系列： | MicroConverter® ADuC8xx |
| 核心處理器： | 8052 |
| 芯體尺寸： | 8-位 |
| 速度： | 16MHz |
| 連通性： | EBI/EMI，I²C，SPI，UART/USART |
| 外圍設備： | PSM，溫度傳感器，WDT |
| 輸入/輸出數(shù)： | 34 |
| 程序存儲器容量： | 62KB（62K x 8） |
| 程序存儲器類型： | 閃存 |
| EEPROM 大?。?/td> | 4K x 8 |
| RAM 容量： | 2.25K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.7 V ~ 5.5 V |
| 數(shù)據(jù)轉換器： | A/D 8x12b，D/A 2x12b |
| 振蕩器型： | 內部 |
| 工作溫度： | -40°C ~ 125°C |
| 封裝/外殼： | 52-QFP |
| 包裝： | 托盤 |
| 產(chǎn)品目錄頁面： | 738 (CN2011-ZH PDF) |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁當前第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁
ADuC832
Data Sheet
Rev. B | Page 40 of 92
Table 20. Some Single-Supply Op Amps
Op Amp Model
Characteristics
Micropower
I/O Good up to VDD, low cost
I/O to VDD, micropower, low cost
High gain-bandwidth product (GBP)
High GBP, micro package
FET input, low cost
FET input, high GBP
Keep in mind that the ADC’s transfer function is 0 V to VREF,
and any signal range lost to amplifier saturation near ground
impacts dynamic range. Though the op amps in Table 20 are
capable of delivering output signals very closely approaching
ground, no amplifier can deliver signals all the way to ground
when powered by a single supply. Therefore, if a negative supply
is available, consider using it to power the front-end amplifiers.
However, be sure to include the Schottky diodes shown in
Figure 40 (or at least the lower of the two diodes) to protect the
analog input from undervoltage conditions. In summary, use the
circuit of Figure 40 to drive the analog input ADCx pins of the
ADuC832.
VOLTAGE REFERENCE CONNECTIONS
The on-chip 2.5 V band gap voltage reference can be used as
the reference source for the ADC and DACs. To ensure the
accuracy of the voltage reference, the user must decouple the
VREF pin to ground with a 0.1 F capacitor, and the CREF pin to
ground with a 0.1 F capacitor, as shown in Figure 41.
BUFFER
0.1F
51
VREF
CREF
2.5V
BAND GAP
REFERENCE
ADuC832
02987-
030
Figure 41. Decoupling VREF and CREF
If the internal voltage reference is to be used as a reference for
external circuitry, the CREF output should be used. However, a
buffer must be used in this case to ensure that no current is
drawn from the CREF pin itself. The voltage on the CREF pin is
that of an internal node within the buffer block, and its voltage
is critical to ADC and DAC accuracy. On the ADuC812, VREF is
the recommended output for the external reference; this can be
used but note that there is a gain error between this reference
and that of the ADC.
The ADuC832 powers up with its internal voltage reference in
the on state. This is available at the VREF pin, but as noted
previously, there is a gain error between this and that of the
ADC. The CREF output becomes available when the ADC is
powered up.
If an external voltage reference is preferred, it should be con-
the ADCCON1 SFR must be set to 1 to switch in the external
reference voltage.
To ensure accurate ADC operation, the voltage applied to VREF
must be between 1 V and AVDD. In situations where analog
input signals are proportional to the power supply (such as
some strain gage applications), it may be desirable to connect
the CREF and VREF pins directly to AVDD.
Operation of the ADC or DACs with a reference voltage below
1 V, however, may incur loss of accuracy, eventually resulting in
missing codes or nonmonotonicity. For that reason, do not use
a reference voltage less than 1 V.
0.1F
51
BUFFER
VREF
CREF
EXTERNAL
VOLTAGE
REFERENCE
1 = EXTERNAL
0 = INTERNAL
2.5V
BAND GAP
REFERENCE
ADuC832
ADCCON1[6]
VDD
02987-
031
Figure 42. Using an External Voltage Reference
To maintain compatibility with the ADuC812, the external
reference can also be connected to the VREF pin, as shown in
Figure 43, to overdrive the internal reference. Note that this
introduces a gain error for the ADC that has to be calibrated
out; thus the previous method is the recommended one for
most users. For this method to work, ADCCON1[6] should be
configured to use the internal reference. The external reference
then overdrives this.
相關PDF資料 |
PDF描述 |
|---|---|
| ADUC831BSZ | IC ADC/DAC 12BIT W/MCU 52-MQFP |
| WKP222KCPERUKR | CAP CER 2200PF 760V 10% RADIAL |
| AT32UC3A0512-CTUT | IC MCU 512KB FLASH 144TFBGA |
| XM7A-0442 | CONN USB 1A 30VAC R/A BLACK |
| ATMEGA128L-8AN | MCU AVR 128KB FLASH 8MHZ 64-TQFP |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADUC832BSZ-REEL | 功能描述:IC MCU 62K FLASH ADC/DAC 52MQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:MicroConverter® ADuC8xx 標準包裝: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 外圍設備:欠壓檢測/復位，LED，POR，PWM，WDT 輸入/輸出數(shù):16 程序存儲器容量:4KB（4K x 8） 程序存儲器類型: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)轉換器:- 振蕩器型:內部 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 |
| ADUC832QS-U1 | 制造商:Analog Devices 功能描述:EVAL KIT - Bulk |
| ADUC834 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter, Dual 16-Bit/24-Bit ADCs with Embedded 62 kB Flash MCU |
| ADUC834_02 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter, Dual 16-Bit/24-Bit ADCs with Embedded 62 kB Flash MCU |
| ADUC834BCP | 制造商:Rochester Electronics LLC 功能描述:8BIT CISC 62KB FLASH 12.58MHZ 3.3/5V 56LFCSP - Bulk 制造商:Analog Devices 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。