Summary of LTC2983 – Multi-Sensor High Accuracy Digital Temperature Measurement System
The LTC2983 is a high-accuracy digital system measuring diverse temperature sensors with 0.1°C precision and 0.001°C resolution. It supports standard thermocouples (types B, E, J, K, N, S, R, T), custom thermocouples, RTDs, thermistors, and diodes. Featuring 20 reconfigurable analog inputs, it includes excitation sources and fault detection. The device handles ground-referenced sensors directly using three 24-bit ADCs and an internal reference, eliminating the need for external amplifiers or level shifters.
Parts used in the Multi-Sensor High Accuracy Digital Temperature Measurement System:
- LTC2983
- Type B thermocouple
- Type E thermocouple
- Type J thermocouple
- Type K thermocouple
- Type N thermocouple
- Type S thermocouple
- Type R thermocouple
- Type T thermocouple
- Custom thermocouples
- 2-wire RTDs
- 3-wire RTDs
- 4-wire RTDs
- Thermistors
- Diodes
- Excitation current sources
- Fault detection circuitry
- Three 24-bit ΔΣ ADCs
- Internal 10ppm/°C reference
The LTC2983 measures a wide variety of temperature sensors and digitally outputs the result, in °C or °F, with 0.1°C accuracy and 0.001°C resolution. The LTC2983 can measure the temperature of virtually all standard (type B, E, J, K, N, S, R, T) or custom thermocouples, automatically compensate for cold junction temperatures and linearize the results. The device can also measure temperature with standard 2-, 3-, or 4-wire RTDs, thermistors, and diodes.
It has 20 reconfigurable analog inputs enabling many sensor connections and configuration options. The LTC2983 includes excitation current sources and fault detection circuitry appropriate for each type of temperature sensor. The LTC2983 allows direct interfacing to ground referenced sensors without the need for level shifters, negative supply voltages, or external amplifiers. All signals are buffered and simultaneously digitized with three high accuracy, 24-bit ΔΣ ADC’s, driven by an internal 10ppm/°C (maximum) reference.
For more detail: LTC2983 – Multi-Sensor High Accuracy Digital Temperature Measurement System
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What accuracy does the LTC2983 provide?
The device provides 0.1°C accuracy. -
How many reconfigurable analog inputs are available?
There are 20 reconfigurable analog inputs enabling many sensor connections. -
Can the LTC2983 measure standard thermocouples automatically?
Yes, it measures virtually all standard types including B, E, J, K, N, S, R, and T while automatically compensating for cold junction temperatures. -
Does the system require external amplifiers for ground referenced sensors?
No, it allows direct interfacing to ground referenced sensors without the need for external amplifiers. -
What type of ADCs drive the signal digitization?
All signals are buffered and simultaneously digitized with three high accuracy 24-bit ΔΣ ADCs. -
Which sensor types can this device measure besides thermocouples?
The device can also measure temperature with standard 2-, 3-, or 4-wire RTDs, thermistors, and diodes. -
What is the resolution of the digital output?
The digital output has a resolution of 0.001°C. -
Does the LTC2983 include excitation current sources?
Yes, it includes excitation current sources appropriate for each type of temperature sensor.
