- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄11791 > ADUC7129BSTZ126-RL (Analog Devices Inc)IC DAS MCU ARM7 ADC/DDS 80-LQFP PDF資料下載
參數(shù)資料
| 型號： | ADUC7129BSTZ126-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 31/92頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC DAS MCU ARM7 ADC/DDS 80-LQFP |
| 產(chǎn)品培訓(xùn)模塊： | ARM7 Applications & Tools Intro to ARM7 Core & Microconverters Process Control Direct Digital Synthesis Tutorial Series (1 of 7): Introduction |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | MicroConverter® ADuC7xxx |
| 核心處理器： | ARM7 |
| 芯體尺寸： | 16/32-位 |
| 速度： | 41.78MHz |
| 連通性： | EBI/EMI，I²C，SPI，UART/USART |
| 外圍設(shè)備： | PLA，POR，PWM，PSM，溫度傳感器，WDT |
| 輸入/輸出數(shù)： | 38 |
| 程序存儲器容量： | 126KB（63K x 16） |
| 程序存儲器類型： | 閃存 |
| RAM 容量： | 8K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 3 V ~ 3.6 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 10x12b; D/A 1x10b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 125°C |
| 封裝/外殼： | 80-LQFP |
| 包裝： | 標(biāo)準(zhǔn)包裝 |
| 其它名稱： | ADUC7129BSTZ126-RLDKR |
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頁當(dāng)前第31頁第32頁第33頁第34頁第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
ADuC7128/ADuC7129
Rev. 0 | Page 37 of 92
AVDD
C1
D
R1 C2
AVDD
C1
D
R1 C2
06
02
0-
0
37
Figure 41. Equivalent Analog Input Circuit
Conversion Phase: Switches Open, Track Phase: Switches Closed
For ac applications, removing high frequency components from
the analog input signal is recommended through the use of an
RC low-pass filter on the relevant analog input pins. In applications
where harmonic distortion and signal-to-noise ratio are critical,
the analog input should be driven from a low impedance source.
Large source impedances significantly affect the ac performance
of the ADC and can necessitate the use of an input buffer amplifier.
The choice of the op amp is a function of the particular application.
ADuC7128
ADC0
10
0.01F
06
02
0-
03
8
Figure 42. Buffering Single-Ended/Pseudo Differential Input
ADuC7128
ADC0
VREF
ADC1
06
02
0-
03
9
Figure 43. Buffering Differential Inputs
When no amplifier is used to drive the analog input, the source
impedance should be limited to values lower than 1 kΩ. The
maximum source impedance depends on the amount of total
harmonic distortion (THD) that can be tolerated. The THD
increases as the source impedance increases and the
performance degrades.
DRIVING THE ANALOG INPUTS
Internal or external reference can be used for the ADC. In
differential mode of operation, there are restrictions on the
common-mode input signal (VCM) that are dependent on
reference value and supply voltage used to ensure that the signal
remains within the supply rails.
gives some calculated
V
CM
minimum and VCM maximum values.
Table 39. VCM Ranges
AVDD
VREF
VCM Min
VCM Max
Signal Peak-to-Peak
2.5 V
1.25 V
2.05 V
2.5 V
2.048 V
1.024 V
2.276 V
2.048 V
3.3 V
1.25 V
0.75 V
2.55 V
1.25 V
2.5 V
1.25 V
1.75 V
2.5 V
2.048 V
1.024 V
1.976 V
2.048 V
3.0 V
1.25 V
0.75 V
2.25 V
1.25 V
TEMPERATURE SENSOR
The ADuC7128/ADuC7129 provide a voltage output from an
on-chip band gap reference proportional to absolute temperature.
The voltage output can also be routed through the front end
ADC multiplexer (effectively an additional ADC channel
input), facilitating an internal temperature sensor channel,
measuring die temperature to an accuracy of ±3°C.
The following is a code example of how to configure the ADC
for use with the temperature sensor:
int main(void)
{
float a = 0;
short b;
ADCCON = 0x20;
// power-on the ADC
delay(2000);
ADCCP = 0x10; // Select Temperature Sensor as
// an input to the ADC
REFCON = 0x01;// connect internal 2.5V
// reference to Vref pin
ADCCON = 0xE4;// continuous conversion
while(1)
while (!ADCSTA){};
b = (ADCDAT >> 16);
// To calculate temperature in °C, use
the formula:
a = 0x525 - b;
// ((Temperature = 0x525 - Sensor
Voltage) / 1.3)
a /= 1.3;
b = floor(a);
printf("Temperature: %d oC\n",b);
}
return 0;
}
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| D38999/20FC8SC | CONN RCPT 8POS WALL MNT W/SCKT |
| D38999/26WC8PB | CONN PLUG 8POS STRAIGHT W/PINS |
| MS27473E18A11P | CONN PLUG 11POS STRAIGHT W/PINS |
| AT32UC3C2512C-Z2ZR | IC MCU AVR32 512K FLASH 64QFN |
| MS27484E10B98P | CONN PLUG 6POS STRAIGHT W/PINS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADUC7129BSTZ126-RL2 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Precision Analog Microcontroller ARM7TDMI MCU with 12-Bit ADC and DDS DAC |
| aduc7229bcpz126 | 制造商:Analog Devices 功能描述: |
| ADUC7229BCPZ126-RL | 制造商:Analog Devices 功能描述: |
| ADUC812 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter⑩, Multichannel 12-Bit ADC with Embedded FLASH MCU |
| ADUC812_03 | 制造商:AD 制造商全稱:Analog Devices 功能描述:MicroConverter㈢, Multichannel 12-Bit ADC with Embedded Flash MCU |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。