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參數(shù)資料
| 型號： | ADUC832BS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MicroConverter, 12-Bit ADCs and DACs with Embedded 62 kBytes Flash MCU |
| 中文描述： | 8-BIT, FLASH, 16.78 MHz, MICROCONTROLLER, PQFP52 |
| 封裝： | PLASTIC, MQFP-52 |
| 文件頁數(shù)： | 23/80頁 |
| 文件大?。?/td> | 1311K |
| 代理商： | ADUC832BS |
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REV. 0
ADuC832
–23–
ground, no amplifier can deliver signals all the way to ground
when powered by a single supply. Therefore, if a negative
supply is available, you might consider using it to power the
front end amplifiers. If you do, however, be sure to include the
Schottky diodes shown in Figure 10 (or at least the lower of
the two diodes) to protect the analog input from undervoltage
conditions. To summarize this section, use the circuit of
Figure 10 to drive the analog input 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, you must decouple the V
REF
pin to ground with a 0.1
μ
F capacitor, and the C
REF
pin to
ground with a 0.1
μ
F capacitor as shown in Figure 11.
BUFFER
BUFFER
0.1 F
0.1 F
51
V
REF
C
REF
2.5V
BAND GAP
REFERENCE
ADuC832
Figure 11. Decoupling V
REF
and C
REF
If the internal voltage reference is to be used as a reference for
external circuitry, the C
REF
output should be used. However, a
buffer must be used in this case to ensure that no current is
drawn from the C
REF
pin itself. The voltage on the C
REF
pin is
that of an internal node within the buffer block, and its voltage
is critical to ADC and DAC accuracy. On the ADuC812, V
REF
was the recommended output for the external reference; this
can be used but it should be noted that there will be 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 V
REF
pin, but as noted
before there will be a gain error between this and that of the ADC.
The C
REF
output becomes available when the ADC is powered up.
If an external voltage reference is preferred, it should be
connected to the V
REF
and C
REF
pins as shown in Figure 12.
Bit 6 of the ADCCON1 SFR must be set to 1 to switch in the
external reference voltage.
To ensure accurate ADC operation, the voltage applied to V
REF
must be between 1 V and AV
DD
. 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 C
REF
and V
REF
pins directly to AV
DD
.
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 non-monotonicity. For that reason, do not use
a reference voltage less than 1 V.
BUFFER
0.1 F
51
V
REF
C
REF
EXTERNAL
VOLTAGE
REFERENCE
“1” = EXTERNAL
“0” = INTERNAL
0.1 F
2.5V
BAND GAP
REFERENCE
ADuC832
ADCCON1.6
V
DD
Figure 12. Using an External Voltage Reference
To maintain compatibility with the ADuC812, the external refer-
ence may also be connected to the V
REF
pin as shown in Figure 13,
to overdrive the internal reference. Note 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 will then overdrive this.
BUFFER
0.1 F
0.1 F
51
V
REF
C
REF
2.5V
BAND GAP
REFERENCE
ADuC832
EXTERNAL
VOLTAGE
REFERENCE
V
DD
8
7
Figure 13. Using an External Voltage Reference
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADUC832BS-REEL | 制造商:Analog Devices 功能描述:MCU 8-Bit ADuC8xx 8052 CISC 62KB Flash 3.3V/5V 52-Pin MQFP T/R |
| ADUC832BSZ | 功能描述:IC ADC/DAC 12BIT W/MCU 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: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 外圍設備:POR，PWM，溫度傳感器，WDT 輸入/輸出數(shù):21 程序存儲器容量:40KB（20K x 16） 程序存儲器類型: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)據轉換器:A/D 6x12b 振蕩器型:內部 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 |
| 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 |
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