AD7150 datasheet(9/28 Pages) AD

Part #	AD7150

Description	Ultralow Power, 2-Channel, Capacitance Converter for Proximity Sensing

PDF	28 Pages

Scroll/Zoom	100%

Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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9 / 28 page

Data Sheet

AD7150

Rev. A | Page 9 of 28

–4

–2

–50

100

–25

TEMPERATURE (°C)

Figure 16. Capacitance Input Offset Error vs. Temperature,

VDD = 3.3 V, CIN and EXC Pins Open Circuit

0.2

–0.2

–0.1

0.1

–50

100

–25

TEMPERATURE (°C)

Figure 17. Capacitance Input Gain Error vs. Temperature,

VDD = 3.3 V, CIN to EXC = 2 pF

–2

–1

–50

100

–25

TEMPERATURE (°C)

Figure 18. EXC Frequency Error vs. Temperature,

VDD = 3.3 V

–2

–1

2.7

3.6

3.3

3.0

VDD (V)

Figure 19. EXC Frequency Error vs. VDD

–80

–60

–40

–20

INPUT SIGNAL FREQUENCY (kHz)

Figure 20. Capacitance Channel Frequency Response

0.50

–0.50

–0.25

0.25

064

CAPDAC CODE

Figure 21. CAPDAC Differential Nonlinearity (DNL),

VDD = 3.3 V

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