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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AD5520 датащи(PDF) 13 Page - Analog Devices |
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AD5520 датащи(HTML) 13 Page - Analog Devices |
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13 / 24 page  AD5520 Rev. B | Page 13 of 24 THEORY OF OPERATION The AD5520 is a single-channel per pin parametric measure- ment unit (PPMU) for use in semiconductor automatic test equipment. It contains programmable modes to force a pin voltage and measure the corresponding current (FVMI), force current measure voltage (FIMV), force current measure current (FIMI), force voltage measure voltage (FVMV), and force nothing measure voltage (FNMV). The PPMU can force or measure a voltage from −11 V to +11 V. It can force or measure currents up to 6 mA using the internal amplifier, while the addition of an external amplifier enables higher current ranges. External resistors allow users to choose the optimum ranges for their needs. The device provides a force sense capability to ensure accuracy at the tester pin. A guard output is also available to drive the shield of a force/sense pair. The AD5520 has an on-board window comparator that provides two bits of useful information, DUT too low or too high. Also provided on the chip is clamp circuitry that flags via CLHDETECT and CLLDETECT if the voltage applied to FIN or across the DUT exceeds the voltage applied to CLL and CLH. On-chip is clamp circuitry that clamps the output of the force amplifier if the voltage at MEASIOUT and MEASVOUT exceeds CLL or CLH. |
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