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參數(shù)資料
| 型號(hào)： | EVAL-AD7746EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 28/28頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVALUATION FOR AD7746 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 傳感器類型： | 觸摸，電容式 |
| 接口： | I²C |
| 電源電壓： | 2.7 V ~ 5.25 V |
| 嵌入式： | 否 |
| 已供物品： | 板，纜線，CD |
| 已用 IC / 零件： | AD7746 |
| 產(chǎn)品目錄頁(yè)面： | 781 (CN2011-ZH PDF) |
| 相關(guān)產(chǎn)品： | AD7746ARUZ-ND - IC CONV 2CH CAP TO DGTL 16-TSSOP AD7746ARUZ-REEL7-ND - IC CONV 2CH CAP TO DGTL 16-TSSOP AD7746ARUZ-REEL-ND - IC CONV 2CH CAP TO DGTL 16-TSSOP |
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AD7745/AD7746
Rev. 0| Page 9 of 28
8
–12
–250
250
05468-028
CIN LEAKAGE TO GND (nA)
CAP
ACITANCE
E
RROR
(fF)
2.7V
3V
6
4
2
0
–2
–4
–6
–8
–10
–200 –150 –100
–50
0
50
100
150
200
Figure 12. Capacitance Input Error vs. Leakage Current to GND,
CIN(+) to EXC = 4 pF, CIN() to EXC = 0 pF,
VDD = 2.7 V and 3 V
8
–12
–250
250
05468-030
CIN LEAKAGE TO GND (nA)
CAP
ACITANCE
E
RROR
(fF)
6
4
2
0
–2
–4
–6
–8
–10
–200 –150 –100
–50
0
50
100
150
200
3.3V
5V
Figure 13. Capacitance Input Error vs. Leakage Current to GND,
CIN(+) to EXC =4 pF, CIN() to EXC = 0 pF,
VDD=3.3 V and 5 V
10
0.0001
1
100000
05468-029
PARALLEL RESISTANCE (M
)
CAP
ACITANCE
E
RROR
(pF)
1
0.1
0.01
0.001
10
100
1000
10000
Figure 14. Capacitance Input Error vs. Resistance in Parallel
with Measured Capacitance
0
–10
07
05468-031
SERIAL RESISTANCE (k
)
CAP
ACITANCE
E
RROR
(fF)
–2
–4
–6
–8
12345
6
Figure 15. Capacitance Input Error vs. Serial Resistance,
CIN(+) to EXC = 21 pF, CIN() to EXC = 23 pF, VDD = 5 V,
the Same Configuration as in Figure 34.
0.2
–1.0
2.5
5.5
05468-032
VDD (V)
CAP
ACITANCE
E
RROR
(fF)
0
–0.2
–0.4
–0.6
–0.8
3.0
3.5
4.0
4.5
5.0
Figure 16. Capacitance Input Power Supply Rejection (PSR),
CIN(+) to EXC = 4 pF, the Same Configuration as in Figure 30
0.20
–0.20
0
128
05468-033
CAPDAC CODE
CAP
DAC
CODE
DNL
(pF)
0.15
0.10
0.05
0
–0.05
–0.10
–0.15
16
32
48
64
80
96
112
Figure 17. CAPDAC Differential Nonlinearity (DNL)
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