AD7746 データシートの表示（PDF） - Analog Devices
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AD7746 Datasheet PDF : 28 Pages
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AD7745/AD7746
TYPICAL PERFORMANCE CHARACTERISTICS
100
80
60
40
20
0
–5 –4 –3 –2 –1 0 1 2 3 4 5
INPUT CAPACITANCE (pF)
Figure 6. Capacitance Input Integral Nonlinearity,
VDD = 5 V, the Same Configuration as in Figure 31
2000
GAIN TC ≈ –26ppm/°C
1000
0
–1000
–2000
–3000
–50 –25
0
25
50
75 100 125 150
TEMPERATURE (°C)
Figure 7. Capacitance Input Offset Drift vs. Temperature,
VDD = 5 V, CIN and EXC Pins Open Circuit
100
75
50
25
0
–25
–50
–75
–100
–50 –25
0
25
50
75 100 125 150
TEMPERATURE (°C)
Figure 8. Capacitance Input Gain Drift vs. Temperature,
VDD = 5 V, CIN(+) to EXC = 4 pF, the Same Configuration as in Figure 30
18
2.7V 3V
3.3V
5V
16
14
12
10
8
6
4
2
0
–2
0 50 100 150 200 250 300 350 400 450 500
CAPACITANCE CIN PIN TO GND (pF)
Figure 9. Capacitance Input Error vs. Capacitance between CIN and GND.
CIN(+) to EXC = 4 pF, CIN(−) to EXC = 0 pF, VDD = 2.7 V, 3 V, 3.3 V, and 5 V,
the Same Configuration as in Figure 33
18
16
14
2.7V 3V
3.3V
12
10
8
6
5V
4
2
0
–2
0 50 100 150 200 250 300 350 400 450 500
CAPACITANCE CIN PIN TO GND (pF)
Figure 10. Capacitance Input Error vs. Capacitance between CIN and GND,
CIN(+) to EXC = 21 pF, CIN(−) to EXC = 23 pF, VDD = 2.7 V, 3 V, 3.3 V, and 5 V,
the Same Configuration as in Figure 34
5
2.7V
3V
4
5V
3
3.3V
2
1
0
–1
0 50 100 150 200 250 300 350 400 450 500
CAPACITANCE EXC PIN TO GND (pF)
Figure 11. Capacitance Input Error vs. Capacitance between EXC and GND,
CIN(+) to EXC = 21 pF, CIN(−) to EXC = 23 pF, VDD = 2.7 V, 3 V, 3.3 V, and 5 V,
the Same Configuration as in Figure 34
Rev. 0 | Page 8 of 28
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