LTC2983C View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC2983C' PDF : 72 Pages View PDF
LTC2983
Applications Information
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 D8 D7 D6 D5 D4 D3 D2 D1 D0
Fault Data
SIGN MSB
LSB
Temperature Sensor ADC CJ CJ Sensor Sensor ADC Valid
Hard Hard Hard Soft Over Under Out If 1
Fault Fault Fault Fault Range Range of
Fault Fault Range
Fault
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 111111111
1024°C
1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 000000000
1°C
1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 000000000
1/1024°C
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 000000001
0°C
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 000000000
–1/1024°C
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 111111111
–1°C
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 000000000
–273.15°C
1 1 1 1 1 1 0 1 1 1 0 1 1 1 0 1 101100111
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 D8 D7 D6 D5 D4 D3 D2 D1 D0
Fault Data
SIGN MSB
LSB
Temperature Sensor ADC CJ CJ Sensor Sensor ADC Valid
Hard Hard Hard Soft Over Under Out If 1
Fault Fault Fault Fault Range Range of
Fault Fault Range
Fault
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 111111111
1024°F
1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 000000000
1°F
1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 000000000
1/1024°F
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 000000001
0°F
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 000000000
–1/1024°F
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 111111111
–1°F
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 000000000
–459.67°F
1 1 1 1 1 1 0 0 0 1 1 0 1 0 0 0 101010010
Table 10. Sensor Fault Reporting
BIT
FAULT
D31
Sensor Hard Fault
D30
Hard ADC-Out-of-Range
D29
CJ Hard Fault
D28
CJ Soft Fault
D27
Sensor Over Range
D26
Sensor Under Range
D25
ADC Out-of-Range
D24
Valid
20
ERROR TYPE
Hard
Hard
Hard
Soft
Soft
Soft
Soft
NA
DESCRIPTION
Bad Sensor Reading
Bad ADC Reading (Could Be Large External Noise Event)
Cold Junction Sensor Has a Hard Fault Error
Cold Junction Sensor Result Is Beyond Normal Range
Sensor Reading Is Above Normal Range
Sensor Reading Is Below Normal Range
ADC Absolute Input Voltage Is Beyond ±1.125 • VREF/2
Result Valid (Should Be 1) Discard Results if 0
For more information www.linear.com/LTC2983
OUTPUT RESULT
–999°C or °F
–999°C or °F
–999°C or °F
Suspect Reading
Suspect Reading
Suspect Reading
Suspect Reading
Suspect Reading
2983fa
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