AD7755 Просмотр технического описания (PDF) - Analog Devices

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Компоненты Описание

производитель

AD7755

Energy Metering IC with Pulse Output

Analog Devices 

AD7755

0.8

PF = 0.5

GAIN = 8

0.6

ON-CHIP REFERENCE

–40؇C PF = 0.5

0.4

0.2

+25؇C PF = 1

0.0

–0.2

+25؇C PF = 0.5

–0.4

+85؇C PF = 0.5

–0.6

–0.8

0.01

0.1

1

10

100

Amps

Figure 8. Error as a % of Reading (Gain = 8)

0.4

PF = 1

0.3 GAIN = 16

EXTERNAL REFERENCE

0.2

– 40؇C

0.1

+25؇C

0.0

– 0.1

– 0.2

+85؇C

– 0.3

– 0.4

0.01

0.1

1

10

100

Amps

Figure 11. Error as a % of Reading over Temperature with

an External Reference (Gain = 16)

0.4

0.2

–40؇C PF = 0.5

0.0

– 0.2

– 0.4

– 0.6

+25؇C PF = 1

+25؇C PF = 0.5

+85؇C PF = 0.5

– 0.8

PF = 0.5

GAIN = 16

ON-CHIP REFERENCE

– 1.0

0.01

0.1

1

10

100

Amps

Figure 9. Error as a % of Reading (Gain = 16)

0.4

PF = 1

0.3 GAIN = 2

EXTERNAL REFERENCE

0.2

0.1

+ 25؇C

0.0

– 40؇C

– 0.1

– 0.2

+ 85؇C

– 0.3

– 0.4

0.01

0.1

1

10

100

Amps

Figure 10. Error as a % of Reading over Temperature with

an External Reference (Gain = 2)

0.8

0.6

PF = 1

0.4

0.2

PF = 0.5

0.0

–0.2

–0.4

–0.6

45

50

55

60

65

70

75

FREQUENCY – Hz

Figure 12. Error as a % of Reading over Frequency

VDD

10␮F

100nF

100nF

10␮F

40A TO

40mA

500␮⍀

1.5m⍀

10m⍀

1k⍀

33nF

1k⍀

33nF

1M⍀

220V

1k⍀ 33nF

1k⍀

33nF

10␮F 100nF

AVDD AC/DC AVDD

NC

F1

V1P U1 F2

AD7755 CF

REVP

V1N

NC

CLKOUT

V2N

CLKIN

G0

V2P

G1

S0

REFIN/OUT

S1

SCF

RESET AGND DGND

U3

K7

K8

PS2501-1

33pF

Y1

3.58MHz

33pF

GAIN

SELECT

VDD

10k⍀

10nF 10nF 10nF

NC = NO CONNECT

VDD

Figure 13. Test Circuit for Performance Curves

–8–

REV. B

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