AD7755AARS datasheet(3/16 Pages) AD

Nome de Peças	AD7755AARS

Descrição Electrónicos	Energy Metering IC with Pulse Output

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Fabricante Electrônico	AD [Analog Devices]

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REV. B

–3–

AD7755

Parameter

A Version

B Version

Unit

Test Conditions/Comments

POWER SUPPLY

For Specified Performance

AVDD

4.75

V min

5 V – 5%

5.25

V max

5 V + 5%

DVDD

4.75

V min

5 V – 5%

5.25

V max

5 V + 5%

AIDD

3

mA max

Typically 2 mA

DIDD

2.5

mA max

Typically 1.5 mA

NOTES

1See Terminology section for explanation of specifications.

2See Plots in Typical Performance Graphs.

3Sample tested during initial release and after any redesign or process change that may affect this parameter.

Specifications subject to change without notice.

TIMING CHARACTERISTICS1, 2

Parameter

A, B Versions

Unit

Test Conditions/Comments

t1

3

275

ms

F1 and F2 Pulsewidth (Logic Low)

t2

See Table III

sec

Output Pulse Period. See Transfer Function Section

t3

1/2 t2

sec

Time Between F1 Falling Edge and F2 Falling Edge

t4

3, 4

90

ms

CF Pulsewidth (Logic High)

t5

See Table IV

sec

CF Pulse Period. See Transfer Function Section

t6

CLKIN/4

sec

Minimum Time Between F1 and F2 Pulse

NOTES

1Sample tested during initial release and after any redesign or process change that may affect this parameter.

2See Figure 1.

3The pulsewidths of F1, F2 and CF are not fixed for higher output frequencies. See Frequency Outputs Section.

4The CF pulse is always 18

µs in the high frequency mode. See Frequency Outputs section and Table IV.

Specifications subject to change without notice.

ORDERING GUIDE

Model

Package Description

Package Options

AD7755AAN

Plastic DIP

N-24

AD7755AARS

Shrink Small Outline Package

RS-24

AD7755ABRS

Shrink Small Outline Package

RS-24

EVAL-AD7755EB

AD7755 Evaluation Board

AD7755AAN-REF AD7755 Reference Design PCB (See AN-559)

(AVDD = DVDD = 5 V

5%, AGND = DGND = 0 V, On-Chip Reference, CLKIN = 3.58 MHz, TMIN to

TMAX = –40 C to +85 C)

.t2

.t3

t4

.t5

.t6

t1

F1

F2

CF

Figure 1. Timing Diagram for Frequency Outputs

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