ALD1721E Просмотр технического описания (PDF) - Advanced Linear Devices

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ALD1721E

EPAD® MICROPOWER CMOS OPERATIONAL AMPLIFIER

Advanced Linear Devices 

ALD1721E

TYPICAL PERFORMANCE CHARACTERISTICS (cont'd)

TWO EXAMPLES OF EQUIVALENT INPUT OFFSET VOLTAGE DUE TO

CHANGE IN SUPPLY VOLTAGE vs. SUPPLY VOLTAGE

500

PSRR = 80 dB

400

EXAMPLE A:

VOS EPAD PROGRAMMED

AT VSUPPLY = +5V

300

200

EXAMPLE B:

VOS EPAD

PROGRAMMED

AT VSUPPLY = +8V

100

0

0

1

2

3

4

5

6

7

8

9

10

SUPPLY VOLTAGE (V)

THREE EXAMPLES OF EQUIVALENT INPUT OFFSET VOLTAGE DUE TO

CHANGE IN COMMON MODE VOLTAGE vs. COMMON MODE VOLTAGE

500

VSUPPLY = ±5V

CMRR = 80dB

400

300

EXAMPLE B:

VOS EPAD

PROGRAMMED

200 AT VIN = -4.3V

EXAMPLE A:

VOS EPAD PROGRAMMED

AT VIN = 0V

100

EXAMPLE C:

VOS EPAD PROGRAMMED

0

AT VIN = +5V

-5

-4

-3

-2

-1

0

1

2

3

4

5

COMMON MODE VOLTAGE (V)

EXAMPLE OF MINIMIZING EQUIVALENT INPUT OFFSET VOLTAGE

FOR A COMMON MODE VOLTAGE RANGE OF 0.5V

50

COMMON MODE VOLTAGE RANGE OF 0.5V

40

30

VOS EPAD

20

PROGRAMMED

AT COMMON MODE

CMRR = 80dB

VOLTAGE OF 0.25V

10

0

-0.5 -0.4 -0.3 -0.2

-0.1 0.0

0.1

0.2

0.3

0.4

0.5

COMMON MODE VOLTAGE (V)

Advanced Linear Devices

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