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ES51919 Datasheet(PDF) 2 Page - Cyrustek corporation |
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ES51919 Datasheet(HTML) 2 Page - Cyrustek corporation |
2 / 11 page Ver 2.1 12/03/01 2 Introduction The ES51919/ES51920 chipset is a total solution for high accuracy LCR meter which could measure Inductance/Capacitance/Resistance with secondary parameters including dissipation factor(D), quality factor(Q), phase angle(θ), equivalent series/parallel resistance(ESR or Rp). The chipset is fully auto ranging operation for AC impedance & DC resistance measurement. Because of high integrated circuit design, a smart measurement for L/C/R is possible (AUTOLCR mode). It means the user could measure the L/C/R components directly at AUTOLCR smart mode without changing the function key. User could also select the target test frequencies of 100Hz/120Hz/1kHz/10kHz/100kHz depending on DUT type. Components could be measured in series or parallel mode according to the DUT impedance automatically. The LCR chipset built-in a 4.5 digits ADC operates at 1.2/s updating rate nominally for L/C/R mode. The chipset operates at 0.5/s updating rate for DCR mode. The general DMM could measure DC resistance only, but the LCR meter could measure DC resistance and AC impedance. The impedance consists of resistance (real part) and reactance (imaginary part). For example, Zs represents the impedance in series mode. Zs can be defined a combination of resistance Rs and reactance Xs. It also could be defined as a |Z| of magnitude with a phase angle θ. Zs = Rs + jXs | Zs | Real axis Imaginary axis (series mode) Rs Xs θ Zs1 = Rs1 + jXs1 Xs1 Rs1 θ1 θ > 0 θ1 < 0 Zs = Rs + jXs | Zs | Real axis Imaginary axis (series mode) Rs Xs θ Zs1 = Rs1 + jXs1 Xs1 Rs1 θ1 θ > 0 θ1 < 0 Zs = Rs + jXs or |Zs|∠θ |
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