Wide-range multi-channel digital temperature sensing chip - M401
Remote temperature measurement range -55~220°C (for temperatures above 150°C, high-temperature transistors are required), local temperature measurement range -55~125°C
Storage and calibration
Built-in non-volatile memory (NVM) for calibration coefficients of 5 temperature measurement channels
Provides users with 32-bit additional storage space
Product introduction
The wide-range multi-channel digital temperature sensing chip - M401 is based on a new CMOS mixed-signal process and includes one internal local temperature measurement channel and four channels that can drive external remote temperature sensing transistors (NPN, PNP) or diodes. The chip integrates temperature measurement drive circuits, conditioning, ADC conversion, temperature calculation, calibration compensation, non-volatile memory, power management, and other units. It outputs via the I2C digital bus and provides alarm interface signals.
1.Features of the wide-range multi-channel digital temperature sensing chip - M401:
1) Remote temperature measurement range -55~220°C (for temperatures above 150°C, high-temperature transistors are required), local temperature measurement range -55~125°C
2) Storage and calibration
Built-in non-volatile memory (NVM) for calibration coefficients of 5 temperature measurement channels
Provides users with 32-bit additional storage space
3) High-reliability design
I/O glitch filtering
Open/short circuit detection for temperature measurement terminals
Parity check for temperature data
4) 2-bit I2C address bits, can be used for multi-point measurement bus
5) Two over-temperature threshold judgment and alarm functions
6) Temperature measurement accuracy (refer to the table below)
Error <2.2°C in the range of -40°C to +125°C
Error <4.5°C in the range of -55°C to +220°C (single remote channel)
7) Temperature resolution: 0.03125°C (14-bit ADC)
8) Low power design
35μA for periodic measurement once per second
3μA standby current
9) Temperature conversion
Configurable conversion speed: 14/25ms per channel
Configurable periodic sampling: 16s/8s/4s/2s/1s/0.5s/0.25s
Continuous mode sampling or single sampling
Configurable output combination of any of the 5 channels
10) High-performance ESD protection
Passes HBM ±8000V; MM ±700V
2.Applications of the wide-range multi-channel digital temperature sensing chip - M401:
Electric meters
Data centers
Multi-node temperature monitoring in industrial process control
Automotive electronics
Smart kitchen appliances
3.Block diagram of the wide-range multi-channel digital temperature sensing chip - M401:
4.Application circuit of the wide-range multi-channel digital temperature sensing chip - M401:
