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ADM9264ARN bảng dữ liệu(PDF) 10 Page - Analog Devices |
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10 / 12 page ADM9264 –10– REV. 0 APPLICATIONS A typical application of the ADM9264 is shown in Figure 23. The analog inputs SU1 to SU4 are connected to the four power supply outputs of a system to monitor the supply voltages. One of the digital inputs, ERRY, is connected to a temperature sensor such as the TMP01 or AD22105. The trip point of the overtemperature comparator is set by RSET so that the output goes low when the temperature exceeds safe limits. (See the appropriate Analog Devices data sheet for more information on these devices.) The other digital input, ERRX, is connected to a fan failure sensor. This can be something as simple as a vane switch mounted in the fan air flow, which opens if the air flow fails. SU1 10k Ω VCC SUPER I/O CHIP MICROPROCESSOR SU2 10k Ω VCC SU3 10k Ω VCC SU4 10k Ω VCC ERRX VCC FAN (ALARM MONITOR) AD22105 TEMPERATURE SENSOR 6 7 1 2 RSET 3 PSU #1 12V PSU #2 5V PSU #3 3.3V PSU #4 2.8V DIS SU4DET ADM9264 ERR3 ERR1 ERRY ERR4 ERR2 Figure 23. Typical Application of ADM9264 The digital outputs of the ADM9264 are interfaced to the system microprocessor through the GPIO lines or via an I/O adapter chip. Depending on the level of fault diagnostics required in the system, the four error outputs ( ERR1 to ERR4) corresponding to the analog inputs SU1 to SU4 can be indi- vidually connected to the I/O chip to give specific indication of which supply voltage has failed, while the PWROK output indicates an overtemperature or system cooling failure. Alter- natively, the PWROK output can be used alone to give a nonspecific failure indication. |
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