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AD5522JSVD датащи(PDF) 26 Page - Analog Devices |
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AD5522JSVD датащи(HTML) 26 Page - Analog Devices |
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26 / 48 page ![]() AD5522 Preliminary Technical Data Rev. PrM | Page 26 of 48 CIRCUIT OPERATION FORCE VOLTAGE, FV Most PMU measurements are performed while in force voltage and measure current mode, for example, when the device is used as a device power supply, or in continuity or leakage testing. In the force voltage mode, the voltage forced is mapped directly to the DUT. The voltage measure amplifier completes the loop giving negative feedback to the forcing amplifier. See Figure 24. Forced Voltage at DUT = VFIN Where: VFIN = Voltage of the FIN DAC, See VOUT for DAC levels. DUTGND MEASVH DUT Rsense up to (64mA) EXTMEASIH EXTMEASIL FOH EXTFOH CFF FIN + - INTERNAL RANGE SELECT (5uA, 20uA, 200uA, 2mA) Rsense DAC - - - - - - + + + + + + x5 or x10 x1 AGND MEASOUT x1/x0.2 10k Ω OFFSET DAC BIAS TO CENTER IRANGE Figure 24. Forcing voltage, measuring current |
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