Rainbow-electronics AT73C502 Uživatelský manuál

1Features• Fulfills IEC 1036, Class 1 Accuracy Requirements• Fulfills IEC 687, Class 0.5 and Class 0.2 Accuracy, with External Temperature Compensated

AT73C50010In multi-channel mode the active energy of each threemeters (phases) is stored in registers 12-14. REG15 is notin use.The maximum value of d

AT73C50011It is recommended that 50 Hz meters are operated from3.2768 MHz crystal. In 60 Hz system, a 3.93216 MHz clockis normally used. Because the c

AT73C50012Output OperationsThe data output by AT73C500 can be divided into threecategories: data to external processor, status informationand impulse

AT73C50013Table 2. Package 1Byte Data Order Meaning1 Sync LS Single byte Synchronization2 Sync MS Single byte Synchronization3 Mode Single byte Mode

AT73C50014The six data packages arrive as follows:Figure 9. Data transfer to processor in six packagesIn normal mode, the Sync LS byte indicates the

AT73C50015Content of Sync LS byte is described in the following table.Bits 3-7 of the Sync LS byte are not used.The Sync MS byte contains a unique 8-b

AT73C50016Figure 11. Contents of a data packageAT73C500 offers some time for the processor to analyzethe synchronization, status and mode information

AT73C50017Status InformationAT73C500 provides the following status informationthrough the Status bus of AT73C500 (B8 - B15, ADDR0).High level of Lx fl

AT73C50018Impulse OutputsAT73C500 provides eight impulse outputs, four meter con-stant outputs and four pulse outputs to drive electrome-chanical disp

AT73C50019CalibrationThe calibration coefficients always have to be loaded intoAT73C500 registers after reset state. The coefficients areeither read f

AT73C5002Figure 1. Block diagram of the AT73C500 chipset in stand-alone configurationThe AT73C500 is programmed to measure active, reactiveand appare

AT73C50020The calibration data is transferred in the following sequence:The meaning of the calibration coefficient mnemonics are as follows:Byte Cali

AT73C50021AT73C500 provides four handshaking signals, ADDR1,RD/WR, STROBE and BRDY, for interfacing with themicroprocessor. Microprocessor can use the

AT73C50022scale values of the powers. The nominal full-scale valuesare:The valid range for the offset calibration factors is -128 to+127.The scale of

AT73C50023where ELSB is the energy value of one LSB in the energyregister, 0.4Wh in default conditions. When the meter isoperated in non-standard cond

AT73C50024Electrical CharacteristicsMeasurement AccuracyThe accuracy measurements are based on the usage ofthe AT73C500 DSP with the single-ended ADC,

AT73C50025The measurements are done according to IEC1036 specifi-cation. The results are averaged over a period of 10s.Before measurements, AT73C500 d

AT73C50026Table 13. Frequency Variation ErrorFrequency Current Voltage Power Factor Min Typ Max Units0.95fN...1.05fN0.1IBUN1.000 -0.2 +0.2 %0.95fN...

AT73C50027Starting CurrentAs default, the starting current is based on 5A basic currentand 80A full scale current range. Temperature CoefficientMeasur

AT73C50028Digital CharacteristicsVDD = 5V, VDA = 5VParameter Min Typ Max UnitsHigh-Level Input Voltage 4.0 VLow-Level Input Voltage 1.0 VHigh-Level Ou

AT73C50029Ordering InformationOrdering Code Package Operation RangeAT73C500-JC 44J Commercial(0°C to 70°C)AT73C501-JC 28J Commercial(0°C to 70°C)AT73C

AT73C5003Pin DescriptionAT73C501 Single-ended ADCFigure 3. PLCC-28 package pin layoutPower Supply Pins Pin I/O DescriptionVDDA 13 PWR Analog Supply,

AT73C50030Packaging Information.045(1.14) X 45°PIN NO. 1IDENTIFY.032(.813).026(.660).050(1.27) TYP.300(7.62) REF SQ.045(1.14) X 30° - 45°.022(.559) X

© Atmel Corporation 1999.Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standa

AT73C5004AT73C502 Differential-Ended ADCFigure 4. QFP-44 package pin layout Power Supply Pins Pin I/O DescriptionVDA12, 13, 29, 30PWRAnalog Supply, P

AT73C5005AT73C500 DSPFigure 5. PLCC-44 package pin layoutPower Supply Pins Pin I/O DescriptionVCC 35, 42 PWR Digital Supply, Positive, +5VGND1, 2, 6,

AT73C5006AT73C501 and AT73C502The AT73C501 consists of six, 16-bit analog-to-digital con-verters. The converters are equipped with single-endedinputs.

AT73C5007If the nominal voltage is chosen to be 120V, the voltagedivider can either have the same configuration as in the230V meter, or it can be modi

AT73C5008Figure 8. Serial bus timingOperating Modes of AT73C500The AT73C500 chipset has six operating modes. Themode is selected by three mode contro

AT73C5009Measurements and CalculationsThe first operation performed by AT73C500 is digital high-pass filtering. The purpose of the filtering is to rem