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LTC2995 Datasheet(PDF) 23 Page - Analog Devices |
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LTC2995 Datasheet(HTML) 23 Page - Analog Devices |
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23 / 90 page  LTM2985 23 Rev. 0 For more information www.analog.com Table 9A. Example Data Output Words (°C) START ADDRESS START ADDRESS + 1 START ADDRESS + 2 START ADDRESS + 3 (END ADDRESS) D31 D30 D29 D28 D27 D26 D25 D24 D23 D22 D21 D20 D19 D18 D17 D16 D15 D14 D13 D12 D11 D10 D9 D8D7 D6 D5 D4 D3 D2 D1 D0 Fault Data SIGN MSB LSB Temperature Sensor Hard Fault ADC Hard Fault CJ Hard Fault CJ Soft Fault Sensor Over Range Fault Sensor Under Range Fault ADC Out of Range Fault Valid If 1 4096°C 1°C 1/1024°C 8191.999°C 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1024°C 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1°C 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1/1024°C 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0°C 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 –1/1024°C 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 –1°C 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 –273.15°C 1 1 1 1 1 1 0 1 1 1 0 1 1 1 0 1 1 0 1 1 0 0 1 1 1 Table 9B. Example Data Output Words (°F) START ADDRESS START ADDRESS + 1 START ADDRESS + 2 START ADDRESS + 3 (END ADDRESS) D31 D30 D29 D28 D27 D26 D25 D24 D23 D22 D21 D20 D19 D18 D17 D16 D15 D14 D13 D12 D11 D10 D9 D8D7 D6 D5 D4 D3 D2 D1 D0 Fault Data SIGN MSB LSB Temperature Sensor Hard Fault ADC Hard Fault CJ Hard Fault CJ Soft Fault Sensor Over Range Fault Sensor Under Range Fault ADC Out of Range Fault Valid If 1 4096°F 1°F 1/1024°F 8191.999°F 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1024°F 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1°F 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1/1024°F 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0°F 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 –1/1024°F 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 –1°F 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 –459.67°F 1 1 1 1 1 1 0 0 0 1 1 0 1 0 0 0 1 0 1 0 1 0 0 1 0 APPLICATIONS INFORMATION Table 10. Sensor Fault Reporting BIT FAULT ERROR TYPE DESCRIPTION OUTPUT RESULT D31 Sensor Hard Fault Hard Bad Sensor Reading –999°C or °F D30 Hard ADC-Out-of-Range Hard Bad ADC Reading (Could Be Large External Noise Event) –999°C or °F D29 CJ Hard Fault Hard Cold Junction Sensor Has a Hard Fault Error –999°C or °F D28 CJ Soft Fault Soft Cold Junction Sensor Result Is Beyond Normal Range Suspect Reading D27 Sensor Over Range Soft Sensor Reading Is Above Normal Range Suspect Reading D26 Sensor Under Range Soft Sensor Reading Is Below Normal Range Suspect Reading D25 ADC Out-of-Range Soft ADC Absolute Input Voltage Is Beyond ±1.125 • VREF/2 Suspect Reading D24 Valid NA Result Valid (Should Be 1) Discard Results if 0 Suspect Reading |
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