AD7156 データシートの表示（PDF） - Analog Devices

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AD7156

Ultralow Power, 1.8 V, 3 mm × 3 mm, 2-Channel Capacitance Converter

Analog Devices 

AD7156

TYPICAL PERFORMANCE CHARACTERISTICS

2.0

1.8

1.6

1.4

1.2

1.8V

1.0

0.8

0.6

0.4

3.3V

0.2

0

0

50

100

150

200

250

300

CAPACITANCE CIN TO GROUND (pF)

Figure 4. Capacitance Input Offset Error vs. Capacitance CIN to GND,

VDD = 1.8 V and 3.3 V, EXC Pin Open Circuit

5

0

–5

3.3V

–10

1.8V

–15

–20

–25

0

50

100

150

200

250

300

CAPACITANCE CIN TO GROUND (pF)

Figure 5. Capacitance Input Gain Error vs. Capacitance CIN to GND,

VDD = 1.8 V and 3.3 V, CIN to EXC = 3 pF

5

0

3.3V

–5

–10

1.8V

–15

–20

–25

0

50

100

150

200

250

300

CAPACITANCE CIN TO GROUND (pF)

Figure 6. Capacitance Input Gain Error vs. Capacitance CIN to GND,

VDD = 1.8 V and 3.3 V, CIN to EXC = 9 pF

1

3.3V

0

1.8V

–1

–2

–3

–4

0

500

1000

1500

2000

CAPACITANCE EXC TO GROUND (pF)

Figure 7. Capacitance Input Offset Error vs. Capacitance EXC to GND,

VDD = 1.8 V and 3.3 V, CIN Pin Open Circuit

1

0

3.3V

1.8V

–1

–2

–3

–4

0

500

1000

1500

2000

CAPACITANCE EXC TO GROUND (pF)

Figure 8. Capacitance Input Gain Error vs. Capacitance EXC to GND,

VDD = 1.8 V and 3.3 V, CIN to EXC = 3 pF

1

0

3.3V

–1

1.8V

–2

–3

–4

0

500

1000

1500

2000

CAPACITANCE EXC TO GROUND (pF)

Figure 9. Capacitance Input Gain Error vs. Capacitance EXC to GND,

VDD = 1.8 V and 3.3 V, CIN to EXC = 9 pF

Rev. 0 | Page 8 of 28

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