參數(shù)資料
型號(hào): ADUC7032BSTZ-88
廠商: Analog Devices Inc
文件頁數(shù): 57/120頁
文件大?。?/td> 0K
描述: IC MCU 96K FLASH DUAL 48LQFP
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: 20.48MHz
連通性: LIN,SPI,UART/USART
外圍設(shè)備: POR,PSM,溫度傳感器,WDT
輸入/輸出數(shù): 9
程序存儲(chǔ)器容量: 96KB(48K x 16)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 1.5K x 32
電壓 - 電源 (Vcc/Vdd): 3.5 V ~ 18 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 2x16b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 105°C
封裝/外殼: 48-LQFP
包裝: 托盤
ADuC7032-8L
Rev. A | Page 41 of 120
ADC GROUND SWITCH
The ADuC7032-8L features an integrated ground switch pin,
GND_SW, located on Pin 15. This switch allows the user to
dynamically disconnect ground from external devices. It allows
either a direct connection to ground or a connection to ground
via a 20 kΩ resistor. This additional resistor can be used to reduce
the number of external components required for an NTC circuit.
The ground switch feature can be used for reducing power
consumption on application-specific boards.
An example application is shown in Figure 17. This diagram
shows an external NTC used in two modes. One mode uses the
internal 20 kΩ resistor, and the second mode shows a direct
connection to ground via the GND_SW. ADCCFG[7] controls
the connection of the ground switch to ground, and ADCMDE[6]
controls the GND_SW resistance.
RREF
REG_AVDD
VTEMP
NTC
20k
REG_AVDD
VTEMP
GND_SW
NTC
05
98
6-
0
17
Figure 17. Example of External Temperature Sensor Circuits
The possible bit combinations are shown in Table 31.
Table 31. GND_SW Configuration
ADCCFG[7]
ADCMDE[6]
GND_SW
0
Floating.
0
1
Floating.
1
0
Direct connection to ground.
1
Connected to ground via a 20 kΩ
resistor.
20k
GND_SW
ADCMDE[6]
ADCCFG[7]
05
98
6-
0
18
Figure 18. Internal Ground Switch Configuration
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