参数资料
型号: ADUC7033BSTZ-88-RL
厂商: Analog Devices Inc
文件页数: 46/140页
文件大小: 0K
描述: IC BATT SENSOR PREC 48LQFP
标准包装: 2,000
功能: 电池监控器
电源电压: 3.5 V ~ 18 V
工作温度: -40°C ~ 115°C
安装类型: 表面贴装
封装/外壳: 48-LQFP
供应商设备封装: 48-LQFP(7x7)
包装: 带卷 (TR)
ADuC7033
ADC GROUND SWITCH
The ADuC7033 features an integrated ground switch pin,
GND_SW, Pin15. 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 using a
20 kΩ resistor. This additional resistor can be used to reduce the
number of external components required for an NTC circuit.
ADCCFG[7] controls the connection of the ground switch to
ground and ADCMDE[6] controls the GND_SW resistance as
shown in Figure 20.
GND_SW
ADCCFG[7]
The ground switch feature can be used for reducing power
consumption on application specific boards.
An example application is shown in Figure 19.
20k ?
ADCMDE[6]
R REF
REG_AVDD
REG_AVDD
Figure 20. Internal Ground Switch Configuration
The possible combinations are shown in Table 31.
NTC
VTEMP
GND_SW
20k ?
NTC
VTEMP
GND_SW
Table 31. GND_SW Configuration
ADCCFG[7] ADCMDE[6] GND_SW
0 0 Floating
0 1 Floating
Figure 19. Example External Temperature Sensor Circuits
This diagram shows an external NTC used in two modes, one
1
1
0
1
Direct connection to ground
Connected to ground via 20 kΩ
resistor
using the internal 20 kΩ resistor, and the second showing a
direct connection to ground, via the GND_SW.
Rev. B | Page 46 of 140
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