AD7124-8
integrated Reference Buffers, Absolute Reference, Split supplies, Excitation currents, Low Power, FIR Filter –50/60Hz Rejection at 40ms settling time, X-Muxing, Diagnostics for Burnout Currents, Invalid calibrations/conversions flagged, CRC...
Thermocouple
TC:
Need absolute reference
TC signal is low level –need PGA (gains of 8-32 depending on TC)
Grounded TC needs split supplies
Floating TC needs biasing
Cold Junction:
If RTD/Thermistor, ratiometricmeasurement
Reference inputs require buffers
Exccurrents required
Transmitters: low power essential
Input Modules: AD7124-8 accommodates 7 TCs and one CJ
FIR Filter allows 50/60 Hz rejection at 40 mssettling time (62 dB rejection)
Diagnostics:
Reference Detect to monitor CJ reference
Burnout Currents detect open wires
X-muxingallows checks on individual pins
Invalid calibrations/conversions flagged
SCLK Counter/Read and Write checks/CRC give robust SPI interface
AD7124-8
integrated Reference Buffers, Absolute Reference, Split supplies, Excitation currents, Low Power, FIR Filter –50/60Hz Rejection at 40ms settling time, X-Muxing, Diagnostics for Burnout Currents, Invalid calibrations/conversions flagged, CRC...
Thermocouple
TC:
Need absolute reference
TC signal is low level –need PGA (gains of 8-32 depending on TC)
Grounded TC needs split supplies
Floating TC needs biasing
Cold Junction:
If RTD/Thermistor, ratiometricmeasurement
Reference inputs require buffers
Exccurrents required
Transmitters: low power essential
Input Modules: AD7124-8 accommodates 7 TCs and one CJ
FIR Filter allows 50/60 Hz rejection at 40 mssettling time (62 dB rejection)
Diagnostics:
Reference Detect to monitor CJ reference
Burnout Currents detect open wires
X-muxingallows checks on individual pins
Invalid calibrations/conversions flagged
SCLK Counter/Read and Write checks/CRC give robust SPI interface
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