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SA2007H датащи(PDF) 5 Page - Sames |
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SA2007H датащи(HTML) 5 Page - Sames |
5 / 10 page 5/10 sames sames SA2007H http://www.sames.co.za INPUT SIGNALS Voltage reference (VREF) A bias resistor of 24kW sets optimum bias conditions on chip. Calibration of the SA2007H should be done in the micro- controllers software. Output Mode (OMODE) The output behavior of the SA2007H is selectable between fixed width outputs or latched outputs. In fixed width mode the P1 and P2 output pulses stay at a fixed width. In latched mode the status of P1 and P2 are cleared with a logic 1 on the RP pin. Refer to the “Output signals in latched mode” section (Page 6) for further information. OUTPUT SIGNALS Pulse outputs (P1, P2) The output on P1 and P2 is a pulse density signal representing the instantaneous power/energy measurement as shown in figure 4. The pulse width t on P1 and P2 change with the p direction of energy measurement t is 71.5µs for positive p energy and doubles (143µS) if negative energy is measured. The output frequency may be calculated using the following formula: 2 f = 11.16 x FOUT x ( I x I ) / I IV R Where: FOUT= Typical rated output frequency (1360Hz) I = Input current on current sense input (16µA at rated I conditions) I = Input current on voltage sense input (14µA at rated V conditions) I = Reference current on VREF typically 50µA R An integrated anti-creep function does not allow output pulses on P1 or P2 if no power is measured by the device. Figure 4: FOUT instantaneous pulse output POWER DR-01282 FOUT V x I vMAINS P t t t t OMODE Description 0 1 Fixed width mode Latched mode Clear Interrupt (RP) A logic 1 on the RP input is used to clear the interrupt generated by the SA2007H when a pulse is generated on P1 or P2, while operating in latched mode. By clearing the interrupt in latched mode the status of the pulse outputs will also be cleared. Test Inputs (TEST, TCLK) For normal operations these pins must be connected to V . SS Direction indication (D1, D2) The SA2007H provides information about the energy flow direction of both current channels separately on pins D1 and D2. Logic 0 on pin D1 or D2 indicates reverse energy flow of that particular channel. Reverse energy flow is defined as the condition where the voltage sense input and current sense input are out of phase (greater than 90 degrees). PRELIMINARY |
Аналогичный номер детали - SA2007H |
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Аналогичное описание - SA2007H |
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