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AFS090 数据表(PDF) 110 Page - Microsemi Corporation |
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AFS090 数据表(HTML) 110 Page - Microsemi Corporation |
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110 / 334 page  Device Architecture 2- 94 R e visio n 2 Temperature Monitor The final pin in the Analog Quad is the Analog Temperature (AT) pin. The AT pin is used to implement an accurate temperature monitor in conjunction with an external diode-connected bipolar transistor (Figure 2-74). For improved temperature measurement accuracy, it is important to use the ATRTN pin for the return path of the current sourced by the AT pin. Each ATRTN pin is shared between two adjacent Analog Quads. Additionally, if not used for temperature monitoring, the AT pin can provide functionality similar to that of the AV pad. However, in this mode only positive voltages can be applied to the AT pin, and only two prescaler factors are available (16 V and 4 V ranges—refer to Table 2-57 on page 2-132). Figure 2-74 • Temperature Monitor Quad Analog Quad AV AC AT Voltage Monitor Block Current Monitor Block AG Digital Input Power MOSFET Gate Driver Current Monitor / Instr Amplifier Temperature Monitor Digital Input Digital Input Pads To Analog MUX To Analog MUX To Analog MUX To FPGA (DAVOUTx) To FPGA (DACOUTx) To FPGA (DATOUTx) On-Chip Gate Driver Temperature Monitor Block Off-Chip From FPGA (GDONx) Prescaler Prescaler Prescaler ATRTN Discrete Bipolar Transistor |
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