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Industrial Precision Temperature Control

Overview

Industrial control processes often require accurate temperature monitoring and control. By using a 32-bit MCU with an integrated precision analog front-end, this system provides accurate temperature measurements with a minimal number of components.

System Benefits:

  • Highly integrated MCU with a 24-bit delta-sigma ADC reduces the BOM count.
  • RS-485 transceiver with high electrostatic discharge (ESD) protection enables reliable operation in industrial environments.
  • Low noise LDO and voltage reference ensure precision measurements.

Block Diagram

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Template 1 Relays Relays Relays Connector Arrow Connector Line Connector Arrow.102 Connector Arrow.103 Connector Arrow.104 3.105 Label Text 10pt.1046 3 3 Sheet.107 3.108 Label Text 10pt.1046 3 3 Sheet.110 Sheet.111 US085 US085 US085 Bi-directional Connector Arrow.84 Connector Arrow.86 5V 5V 5V 3.3V 3.3V 3.3V Connector Arrow.89 Connector Arrow.90 Connector Arrow.91 Connector Arrow.92 3 Label Text 10pt.1046 3 3 Sheet.95 3.96 Label Text 10pt.1046 3 3 Sheet.98 Sheet.101 Connector Arrow.112 Connector 1.160 Connector Arrow.114 Connector 1.115 Connector 1.116 2.5V 2.5V 2.5V 24V 24V 24V Connector Arrow.122 Voltage Reference Voltage Reference Voltage Reference Transceiver Transceiver Transceiver AUX Power AUX Power AUX Power Sheet.80 MCU MCU MCU GPIO GPIO GPIO Connector Arrow Connector Arrow.76 Connector Arrow.77 Connector Arrow.78 PGA PGA PGA MUX MUX MUX 24-bit 24-bit D-S 24-bitD-S MUX.74 UART UART LDO LDO LDO Buck Regulator Buck Regulator Buck Regulator Passive Filters Passive Filters Passive Filters Thermocouple Component block.745 Component block.631 Thermocouple Thermocouple Thermocouple Temp Sensor Component block.751 Component block.747 Component block.748 Temp Sensor Temp Sensor Temp Sensor Connector Arrow.77

MCU

RX 32-Bit Performance/Efficiency MCUs
Application Note
Sample Code

Voltage Reference

Voltage References

Transceiver

RS-485/422 with Enhanced ESD Protection

LDO

Linear Regulators (LDO)

Buck Regulator

Buck Regulators (Integrated FETs)