AD7873ACP datasheet(10/28 Pages) AD

Il numero della parte	AD7873ACP

Spiegazioni elettronici	Touch Screen Digitizer

Download	28 Pages

Scroll/Zoom	100%

Produttore elettronici	AD [Analog Devices]

Homepage	http://www.analog.com

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10 / 28 page

AD7873

Rev. D | Page 10 of 28

0.5

1.5

2.5

3.5

4.5

5.5

6.5

7.5

70

55

25

40

10

85

100

115

130

SAMPLE RATE (kHz)

Figure 11. Reference Current vs. Sample Rate

Y+

X+

X–

Y–

4

5

6

7

8

9

10

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

+VCC (V)

Figure 12. Switch On Resistance vs. +VCC

(X+, Y+: +VCC to Pin; X-, Y-: Pin to GND)

0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

15

35

55

75

95

115

135

155

175

195

SAMPLING RATE (kSPS)

INL: R = 2k

Ω

INL: R = 500

Ω

DNL: R = 2k

Ω

DNL: R = 500

Ω

Figure 13. Maximum Sampling Rate vs. RIN

2

4

6

5

3

8

7

10

9

12

11

14

13

020

–40

–20

40

60

80

TEMPERATURE (°C)

Figure 14. Reference Current vs. Temperature

Y+

X+

X–

Y–

3

4

5

6

7

8

9

–40

–20

0

20

40

60

80

100

TEMPERATURE (°C)

Figure 15. Switch On Resistance vs. Temperature

(X+, Y+: +VCC to Pin; X-, Y-: Pin to GND)

2.4988

2.4990

2.4992

2.4994

2.4996

2.4998

2.5000

2.5002

2.5004

2.5006

TEMPERATURE (°C)

–40

–30 –20 –10

0

10

20

30

40

50

60

70

80

Figure 16. Internal VREF vs. Temperature

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