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ES51931 Datasheet(PDF) 3 Page - Cyrustek corporation |
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ES51931 Datasheet(HTML) 3 Page - Cyrustek corporation |
3 / 34 page Ver. 1.2 10/05/27 3 ES51931 22,000 Counts Auto DMM Pin Description Pin No Symbol Type Description 1 V+ O Output of on-chip DC-DC converter. 2 V+ O Output of on-chip DC-DC converter. 3 DGND P/G Digital ground. Connecting to 3V battery positive terminal. 4 AGND P/G Analog ground. 5 AGND P/G Analog ground. 6 CH+ IO Positive connection for reference capacitor of high-speed A/D. 7 CH- IO Negative connection for reference capacitor of high-speed A/D. 8 CIH O High-speed integrator output. Connect to integral capacitor. 9 BUFFH O High-speed buffer output pin. Connect to integral resistor. 10 CAZH O High-speed auto-zero capacitor connection. 11 CL+ IO Positive connection for reference capacitor of high-resolution A/D. 12 CL- IO Negative connection for reference capacitor of high- resolution A/D. 13 CIL O High-resolution integrator output. Connect to integral capacitor. 14 CAZL O High-resolution auto-zero capacitor connection. 15 BUFFL O High-resolution Buffer output pin. Connect to integral resistor 16 RAZ O Buffer output pin in AZ and ZI phase. 17 IVSH I Current measurement input for 2200μA, 220mA and 22A modes. 18 IVSL I Current measurement input for 220μA, 22mA. 19 OVX I Input high voltage for resistance measurement 20 OVH I Output connection for resistance measurement 21 OVSG O Sense low voltage for resistance measurement 22 OR1 O Reference resistor connection for 220.00Ω range 23 VR5 O Voltage measurement ÷10000 attenuator(1000.0V) 24 VR4 O Voltage measurement ÷1000 attenuator(220.00V) 25 VR3 O Voltage measurement ÷100 attenuator(22.000V) 26 VR2 O Voltage measurement ÷10 attenuator(2.2000V) 27 TEST5 IO Test pin 28 ACVL O DC signal low input in ACV/ACA mode. Connect to negative output of external AC to DC converter. 29 ACVH O DC signal high input in ACV/ACA mode. Connect to positive output of external AC to DC converter. 30 ADI I Negative input of internal AC to DC OP Amp. 31 ADO O Output of internal AC to DC OP Amp. 32 OHMC1 O Filter capacitor connection for resistance mode. 33 OHMC2 O Filter capacitor connection for resistance mode. 34 OHMC3 O Filter capacitor connection for resistance mode. 35 OHMC4 O Filter capacitor connection for resistance mode. 36 NC - 37 VRH O Output of band-gap voltage reference. Typically –1.23V 38 VR I Reference input voltage connection. Typically –100mV 39 SGND G Signal Ground. 40 ADP I Measurement input in ADP mode. Connect to AGND if no used. 41 VA+ I For ADP mode. De-integrating voltage positive input. The input should be higher than VA-. 42 VA- I For ADP mode. De-integrating voltage negative input. The input should be lower than VA+. 43 V220m I Independent input terminal for AC/DC 220.00mV mode. 44 VR1 I Measurement Input. 45 VBAR I In temperature mode, it is used to control decimal point. In µA or mA modes, it is used to control the ‘µ’ or ‘m’ sign. 46 CA- IO Negative auto-zero capacitor connection for capacitor measurement |
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