AD8495 datasheet(7/16 Pages) AD

부품명	AD8495

상세설명	Precision Thermocouple Amplifiers with Cold Junction Compensation

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AD8494/AD8495/AD8496/AD8497

Rev. 0 | Page 7 of

16

TYPICAL PERFORMANCE CHARACTERISTICS

TA = 25°C, +VS = 5 V, RL = ∞, unless otherwise noted.

100

10

1

0.1

0.01

0.1

1

10

100

1k

10k

100k

FREQUENCY (Hz)

AD8495/AD8497

AD8494

AD8496

Figure 3. CMRR vs. Frequency

1000

100

10

1

0

1

10

100

1k

10k

100k

FREQUENCY (Hz)

AD8495/AD8497

AD8494

AD8496

Figure 4. PSRR vs. Frequency

50

40

30

20

10

0

–10

–20

100

1k

10k

100k

1M

FREQUENCY (Hz)

AD8494

AD8496

AD8495/AD8497

Figure 5. Frequency Response

1200

1000

800

600

400

200

0

–200

TIME (50µs/DIV)

CONNECTED

THERMOCOUPLE

OPEN THERMOCOUPLE

THERMOCOUPLE CONNECTION

AD849x OUTPUT

Figure 6. Output Response to Open Thermocouple,

−IN Connected to Ground Through a 1 MΩ Resistor

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

–0.5

–1.0

–0.5

0.5

1.5

2.5

3.5

4.5

5.5

OUTPUT VOLTAGE (V)

+0.05, +3.45

+0.05, +3.21

+4.91, +2.95

+4.91, +2.71

+0.05, –0.36

+0.05, –0.39

+4.91, –0.37

+4.91, –0.39

VREF = 0V

VREF = 2.5V

Figure 7. Input Common-Mode Voltage Range vs. Output Voltage,

+VS = 5 V, VREF = 0 V, and VREF = 2.5 V

35

30

25

20

15

10

5

40

0

1.75

1.50

1.25

1.00

0.75

0.50

0.25

2.00

0

–40

–20

0

20

40

60

80

100

120

TEMPERATURE (°C)

IBIAS

IOS

Figure 8. Input Bias Current and Input Offset Current vs. Temperature

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AD8495 데이터시트(PDF) 7 Page - Analog Devices

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