參數(shù)資料
型號(hào)： EVAL-ADUC7039QSPZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 27/92頁(yè)
文件大?。?/td> 0K
描述： BOARD EVAL FOR ADUC7039
設(shè)計(jì)資源： ADuC7039QSPZ Gerber Files
EVAL-ADuC7039 Schematic & Brd Outline
標(biāo)準(zhǔn)包裝： 1
系列： QuickStart™ PLUS 套件
類(lèi)型： MCU
適用于相關(guān)產(chǎn)品： ADuC7039
所含物品： 板
Data Sheet
ADuC7039
Rev. D | Page 33 of 92
ADC GROUND SWITCH
The ADuC7039 features an integrated ground switch pin,
GND_SW, Pin 9. This switch allows the user to dynamically
disconnect ground from external devices and allows a connec-
tion to ground using a 20 k resistor, reducing the number of
external components required for an NTC circuit as shown in
Figure 13. The ground switch feature can be used for reducing
power consumption on application specific boards.
Figure 13. Internal Ground Switch Configuration
ADC NOISE PERFORMANCE TABLES
Table 24, Table 25, and Table 26 list the output rms noise in
microvolts for some typical output update rates on the I- and
V/T-ADCs. The numbers are typical and are generated at a
differential input voltage of 0 V (I-ADC), 4V (V-ADC) and 0.1 V
(T-ADC). The output rms noise is specified as the standard
deviation (or 1 Σ) of the distribution of ADC output codes
collected when the ADC input voltage is at a dc voltage. It is
expressed as μV rms.
Table 24. Current Channel ADC, Normal Power Mode, Typical Output RMS Noise
ADCFLT
Data Update Rate
ADC Input Range
±2.3 mV
(512)
±37.5 mV
(32)
±300 mV
(4)1
0x961F
10 Hz
0.065 V
0.087 V
0.7 V
0x007F
50 Hz
0.144 V
0.170 V
0.7 V
0x0007
1 kHz
0.663 V
0.780 V
2.6 V
1
The maximum absolute input voltage allowed is 200 mV to +300 mV relative to ground.
Table 25. Voltage Channel ADC, Typical Output RMS Noise (Referred to ADC Voltage Attenuator Input)
ADCFLT
Data Update Rate
28.8 V ADC Input Range
0x961F
10 Hz
65 V
0x007F
50 Hz
65 V
0x0007
1 kHz
180 V
Table 26. Temperature Channel ADC, Typical Output RMS Noise
ADCFLT
Data Update Rate
0 V to 1.2 V ADC Input Range
0x961F
10 Hz
2.8 V
0x007F
50 Hz
2.8 V
0x0007
1 kHz
7.5 V
RREF
REG_AVDD
VTEMP
NTC
20k
GND_SW
ADCCFG[7]
08463-
014
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