Maxim Integrated MAX31855JASA+, Thermocouple to Digital Converter, J-Type Input, Digital Output, 8-SOIC Package, -40°C to 125°C, 900 µA Supply.
| Parameter | Value |
|---|---|
| Type | Thermocouple to Digital Converter |
| Input type | Thermocouple (J) |
| Output type | Digital |
| Mounting | Surface Mount |
| Current - supply | 900 µA |
| Operating temperature | -40°C ~ 125°C |
| Package | Tube |
| Case | 8-SOIC (0.154\", 3.90mm Width) |
The MAX31855JASA+ from Maxim Integrated is a thermocouple-to-digital converter designed specifically for J-type thermocouple probes. It digitises the cold-junction-compensated temperature reading and outputs the result over a SPI-compatible interface.
The 900 µA supply current allows powering from a shared rail. The J-type input is the main selection gate: if your probe is type K, the pinout is the same, but the internal linearisation differs.
No production-status uncertainty here.
The two parts are pin-compatible and share the same package and interface, but the MAX31855JASA+ is linearised for J-type thermocouples while the MAX31855KASA+ is for K-type. They are not electrically interchangeable without changing the probe type.
This part is sourced to order through independent distribution. Submit an RFQ for current availability and pricing — stock and lead time are confirmed at quote time.