AD5242BRZ10(RevD) 查看數據表（PDF） - Analog Devices

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AD5242BRZ10
(Rev.:RevD)

I2C-Compatible, 256-Position Digital Potentiometers

Analog Devices 

Data Sheet

0.1

0.01

RAB = 10kΩ

VDD = 5.5V

0.001

–40

–20

0

20

40

60

80

TEMPERATURE (°C)

Figure 14. Shutdown Current vs. Temperature

70

60

10MΩ VERSION

50

10kΩ VERSION

40

100kΩ VERSION

30

VDD/VSS = 2.7V/0V

TA = 25°C

20

10

0

–10

–20

–30

0

32

64

96 128 160 192 224 256

CODE (Decimal)

Figure 15. ΔVWB/ΔT Potentiometer Mode Temperature Coefficient

120

100

100kΩ VERSION

80

VDD/VSS = 2.7V/0V

TA = 25°C

60

40

20

0

–20

10kΩ VERSION

–40

10MΩ VERSION

–60

–80

0

32

64

96 128 160 192 224 256

CODE (Decimal)

Figure 16. ΔRWB/ΔT Rheostat Mode Temperature Coefficient

AD5241/AD5242

100

TA = 25°C

90

80

VDD/VSS = +2.7V/0V

70

60

50

VDD/VSS = ±2.7V/0V

40

30

VDD/VSS = +5.5V/0V

20

10

–3 –2 –1

0

1

2

3

4

5

6

COMMON-MODE (V)

Figure 17. Incremental Wiper Contact vs. VDD/VSS

300

A: VDD/VSS = 5.5V/0V

CODE = 0xFF

250 B: VDD/VSS = 3.3V/0V

D

CODE = 0xFF

C: VDD/VSS = 2.5V/0V

CODE = 0xFF

200 D: VDD/VSS = 5.5V/0V

A

CODE = 0x55

150

E: VDD/VSS = 3.3V/0V

CODE = 0x55

F: VDD/VSS = 2.5V/0V

CODE = 0x55

100

E

B

50

F

C

0

10

100

1k

FREQUENCY (kHz)

Figure 18. Supply Current vs. Frequency

6

0

–6

–12

–18

–24

–30

–36

–42

–48

–54

100

0xFF

0x80

0x40

0x20

0x10

0x08

0x04

0x02

0x01

1k

10k

100k

1M

FREQUENCY (Hz)

Figure 19. AD5242 10 k Ω Gain vs. Frequency vs. Code

Rev. D | Page 9 of 18

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