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ES51918P 数据表(PDF) 10 Page - Cyrustek corporation |
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ES51918P 数据表(HTML) 10 Page - Cyrustek corporation |
10 / 32 page v1.08 06/04/03 10 ES51918 11,000 Counts Auto DMM 1.1.6 The true RMS-to-DC conversion with ES7R If ES7R is used for true RMS-to-DC measurement, the test circuit is shown in Figure 3. Make ADO and ADI pin short, and TEST5 pin keeps float. Connect OVSG pin to AGND through a switch in ACV measurement mode. If the DCV and ACV measurement modes are in the same rotary switch, please also add this switch in the rotary switch. The configuration of this switch will not influence the precision of DCV measurement. The 500kΩ VR, 1kΩ resistor and 10Ω resistor are used for external offset trim. If users don’t want to use external offset trim, please remove these 3 resistors and connect pin1 of ES7R to pin8 of ES7R. Figure 3. The true RMS-to-DC conversion with ES7R +Vs -Vs 500K 1K 100 AGND OVSG OR1 VR5 VR4 VR3 VR2 TEST5 ACVL ACVH 1.111M 101K 10K 1K 99.5 AGND ACV AGND 1 2 3 4 8 7 6 5 2.2u + +Vs AGND -Vs 100K 1.5K -Vs N1 N2 AGND +Vs -Vs 2 3 1 5 4 7 6 AGND 1u + 47K TL061 30K 10K ADI ADO ADOHZ PWD OP- OP+ OPO AGND 10K 30K 0.1u AGND +Vs +Vs -Vs 4.7u Note: The filter capacitors for +Vs and -Vs are recommended to near to the power terminals of ES7R and external OPAMP. |
类似零件编号 - ES51918P |
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类似说明 - ES51918P |
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