Find the similar part to MAX31850

Hi Brian,

we do unfortunately not have any similar device to MAX31850 in TI's portfolio to date.

However our customer have successfully used our discrete 16-bit or 24-bit ADCs instead. Examples are ADS1120 (16bit, SPI) / ADS1220 (24bit, SPI) or ADS112U04 (16bit, UART)/ ADS122U04 (24bit, UART). We also have I2C options available.

Those ADCs don't offer the same convenience as the MAX31850 because you have to implement the linearization and cold junction compensation yourself in an MCU. However this comes with multiple benefits as well:
- Up to two thermocouples can be measured with one ADC.
- Our ADCs offer in general higher resolution and accuracy than MAX32850, which is limited to 14-bit resolution.
- You can choose which form of cold junction measurement to implement (internal temperature sensor, thermistor, RTD, temp sensor IC). The challenge many customers are facing when using a temperature sensor integrated into the ADC is that the ADC cannot be placed close enough to the actual cold junction measurement point. Thus introducing additional error. Therefore using a 2-wire RTD or thermistor which you can place right at the thermocouple terminals is usually the most accurate solution.
- You can implement a 'true' linearization algorithm which works across the entire temperature range of the thermocouple. MAX31850 does only implement a simple straight-line approximation.

Regards,

Hi Brian,

let me know if this information was helpful or if you need any more details.

Regards,