參數(shù)資料
型號(hào): AD7746ARUZ-REEL
廠商: Analog Devices Inc
文件頁(yè)數(shù): 10/28頁(yè)
文件大?。?/td> 0K
描述: IC CONV 2CH CAP TO DGTL 16-TSSOP
設(shè)計(jì)資源: Extending the Capacitive Input Range of AD7745/AD7746 (CN0129)
標(biāo)準(zhǔn)包裝: 2,500
類型: 電容數(shù)字轉(zhuǎn)換器
分辨率(位): 24 b
數(shù)據(jù)接口: 串行
電壓電源: 單電源
電源電壓: 2.7 V ~ 5.25 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: 16-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 16-TSSOP
包裝: 帶卷 (TR)
配用: EVAL-AD7746EBZ-ND - BOARD EVALUATION FOR AD7746
AD7745/AD7746
Rev. 0 | Page 18 of 28
CONFIGURATION REGISTER
Address Pointer 0x0A, Default Value 0xA0
Converter update rate and mode of operation setup.
Table 17. Configuration Register Bit Map
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Mnemonic
VTF1
VTF0
CAPF2
CAPF1
CAPF0
MD2
MD1
MD0
Default
0
Table 18.
Bit
Mnemonic
Description
Voltage/temperature channel digital filter setup—conversion time/update rate setup.
The conversion times in this table are valid for the CLKCTRL = 0 in the EXC SETUP register. The conversion
times are longer by a factor of two for the CLKCTRL = 1.
VTCHOP = 1
VTF1
VTF0
Conversion Time (ms)
Update Rate (Hz)
–3 dB Frequency (Hz)
0
20.1
49.8
26.4
0
1
32.1
31.2
15.9
1
0
62.1
16.1
8.0
7
6
VTF1
VTF0
1
122.1
8.2
4.0
Capacitive channel digital filter setup—conversion time/update rate setup.
The conversion times in this table are valid for the CLKCTRL = 0 in the EXC SETUP register.
The conversion times are longer by factor of two for the CLKCTRL = 1.
CAP CHOP = 0
CAPF2
CAPF1
CAPF0
Conversion Time (ms)
Update Rate
–3 dB Frequency (Hz)
0
11.0
90.9
87.2
0
1
11.9
83.8
79.0
0
1
0
20.0
50.0
43.6
0
1
38.0
26.3
21.8
1
0
62.0
16.1
13.1
1
0
1
77.0
13.0
10.5
1
0
92.0
10.9
8.9
5
4
3
CAPF2
CAPF1
CAPF0
1
109.6
9.1
8.0
Converter mode of operation setup.
MD2
MD1
MD0
Mode
0
Idle
0
1
Continuous conversion
0
1
0
Single conversion
0
1
Power-Down
1
0
-
1
0
1
Capacitance system offset calibration
1
0
Capacitance or voltage system gain calibration
2
1
0
MD2
MD1
MD0
1
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