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ES51984 Datasheet(PDF) 6 Page - Cyrustek corporation |
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ES51984 Datasheet(HTML) 6 Page - Cyrustek corporation |
6 / 22 page 11/01/05 6 ES51984 3 3/4 CAP AUTO DMM Capacitance Measurement accuracy 4nF range -1.5 — 1.5 %F.S -2 — 2 counts 40nF – 4µF -0.8 — 0.8 %F.S -2 — 2 counts 4µF~4mF -1.1* — 1.1* %F.S -2 — 2 counts *The accuracy of 40uF range is 1.5%F.S Function Description 1.Operating Modes 1.1 Voltage Measurement A reconfigurable voltage divider automatically provides a suitable range in voltage measurement mode. The following table summarizes the full scale ranges in each configuration. Configuration Full Scale Range Divider Ratio Resister Connection VR1 400.0mV 1 - VR2 4.000V 1/10 R2 / (R1+R2) VR3 40.00V 1/100 R3 / (R1+R3) VR3 400.0V 1/1000 R4 / (R1+R4) VR5 4000V 1/10000 R5 / (R1+R5) 1. 400.0 mV range only exists in manual mode. 2. In the 4000V range, if the digit number is larger than 1000V, LCD will display “OL”. The measurement of true RMS using ES636 If ES636 (or other true RMS-to-DC converter chip) is used for true RMS measurement, the suggested application circuit is shown in Figure 1. When ES636 is used for true RMS, make ADO and ADI pin short, keep TEST5 pin float, and connect ACVL pin to SGND. And connect OVSG pin to AGND through a switch in ACV mode. |
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