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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ADP1047ARQZ-R7 датащи(PDF) 64 Page - Analog Devices |
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ADP1047ARQZ-R7 датащи(HTML) 64 Page - Analog Devices |
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64 / 84 page  ADP1047/ADP1048 Data Sheet Rev. 0 | Page 64 of 84 RTD ADC GAIN TRIM SETTING REGISTER This register must be unlocked for write access; see Table 61. Table 86. Register 0xFE18—RTD ADC Gain Trim Setting Bits Bit Name R/W Description 7 Gain polarity R/W 1 = negative gain is introduced. 0 = positive gain is introduced. [6:0] RTD ADC gain trim R/W This value sets the amount of gain trim that is applied to the RTD sensing gain. OT_FAULT_LIMIT REGISTER This register sets the overtemperature fault threshold. The debounce time of the overtemperature fault flag is 100 ms. Table 87. Register 0xFE19—OT_FAULT_LIMIT Bits Bit Name R/W Description [7:0] OT fault threshold R/W Overtemperature fault threshold. This register, adding 0 as the MSB, results in a 9-bit threshold value. This 9-bit value is compared to the nine MSBs of the RTD ADC reading. If the RTD ADC reading is lower than the threshold set by these bits, the overtemperature fault flag is set. These eight bits provide 256 threshold settings from 0 mV to 800 mV (one LSB = 800 mV/256 = 3.125 mV). However, the lowest allowed value is 9.375 mV (0x03), and the highest allowed value is 781.25 mV (0xFA). Bit 7 Bit 6 … Bit 3 Bit 2 Bit 1 Bit 0 OTP Threshold (mV) 0 0 … 0 0 1 1 9.375 0 0 … 0 1 0 0 12.5 0 0 … 0 1 0 1 15.875 … … … … … … … … 1 1 … 1 0 0 1 778.125 1 1 … 1 0 1 0 781.25 OT_WARN_LIMIT REGISTER This register sets the overtemperature warning threshold. The debounce time of the overtemperature warning flag is 100 ms. Table 88. Register 0xFE1A—OT_WARN_LIMIT Bits Bit Name R/W Description [7:0] OT warning threshold R/W Overtemperature warning threshold. This register, adding 0 as the MSB, results in a 9-bit threshold value. This 9-bit value is compared to the nine MSBs of the RTD ADC reading. If the RTD ADC reading is lower than the threshold set by these bits, the overtemperature warning flag is set. These eight bits provide 256 threshold settings from 0 mV to 800 mV (one LSB = 800 mV/256 = 3.125 mV). However, the lowest allowed value is 9.375 mV (0x03), and the highest allowed value is 781.25 mV (0xFA). Bit 7 Bit 6 … Bit 3 Bit 2 Bit 1 Bit 0 OTP Threshold (mV) 0 0 … 0 0 1 1 9.375 0 0 … 0 1 0 0 12.5 0 0 … 0 1 0 1 15.875 … … … … … … … … 1 1 … 1 0 0 1 778.125 1 1 … 1 0 1 0 781.25 |
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