AT73C501 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

MFG CO.

AT73C501

Chip Set Solution for Watt-Hour Meters

Atmel Corporation 

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Electrical Characteristics

Absolute Maximum Ratings

Parameter

Min

Typ

Max Unit

Supply Voltage VCC,

VDA, VDDA

Input Voltage, Digital

4.75

-0.3

5.25

V

VDD

+0.3

V

Input Voltage, Analog -0.3

VDA

+0.3

V

Input Voltage, CI and

VI inputs

1.25

3.75

V

Ambient Operating

Temp.

-25

+70

C

Storage Temperature -65

+150

C

Calibration Characteristics

Parameter

Gain Calibration

Calibration Range ±

Calibration

Resolution

Phase Calibration

Calibration Range ±

Calibration

Resolution

Offset Calibration,

Active Power

Calibration Range

Calibration

Resolution

Range,% of Full

Scale Phase Power

Offset Calibration,

Reactive Power

Calibration Range

Calibration

Resolution

Range,% of Full

Scale Phase Power

Min

Typ

Max Units

20

%

0.16

%

5.625

0.044

degree

degree

89.8

W

0.7015

W

0.4157

%

98.7

VAr

0.7712

VAr

0.457

%

Measurement Accuracy

The accuracy measurements are based on the usage of

the AT73C500 DSP with the single-ended ADC,

AT73C501. Using the differential-ended ADC, AT73C502,

improves some of the results.

Input Conditions

When specifying measurement accuracy, it is assumed

that 80ARMS phase current will produce 2VPP full scale input

voltage to current converters. The basic current, IB, is sup-

posed to be 5ARMS.

The nominal phase voltage, UN, is specified to be 230VRMS

and 2VPP full scale input is produced by 270VRMS.

Overall Accuracy, Active and Reactive Power and

Energy Measurement

Overall accuracy including errors caused by A/D-conver-

sion of current and voltage signals, calibration and calcula-

tions.

The accuracy figures are measured in nominal conditions

unless otherwise indicated in the parameter field of the

table below.

Parameter

Nominal voltage, UN

Full-scale voltage, UFS

Full-scale current, IFS

Base current, IB

Frequency, f

Power factor, PF

Harmonic contents of voltage

Harmonic contents of current

Temperature, T

AT73C500 master clock

Nominal Value

230V, ±1%

270V

80A

5A

50.0 Hz, ±0.3%

1

less than 2%

less than 20%

23°C, ±2°C

3.2768 MHz

24

AT73C500

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