Cold-junction compensated thermocouple interface in 8-SOIC
The Analog Devices MAX31855TASA+ is a thermocouple-to-digital converter that directly interfaces with multiple thermocouple types, integrating cold-junction compensation and digitizing the thermocouple voltage into a digital output (SPI-compatible) in an 8-SOIC surface-mount package. It draws 900 µA supply current, making it suitable for battery-powered or loop-powered temperature measurement systems where power budget is tight. Rated for -40°C to 125°C operating temperature, this converter fits industrial process control, engine bay monitoring, and outdoor equipment where the ambient sees wide thermal swings.
Supply current and temperature range — what they mean for your BOM
The 900 µA supply current is the active conversion current — not a standby figure. The -40°C to 125°C range covers both cold-crank startup and under-hood heat soak.
Package and mounting — board-fit details
Housed in an 8-SOIC package (0.154" body width, 3.90 mm), the MAX31855TASA+ uses a standard surface-mount footprint shared by countless 8-pin SOIC parts. The supplier device package is also 8-SOIC, so no footprint surprise between the case code and the supplier code. Shipping medium is Tube — not Tape & Reel. If your pick-and-place line is set up for reel feed, factor in a tube-to-reel transfer or order the tape-and-reel variant if one exists in the family.
Lifecycle and compliance
The MAX31855TASA+ carries an Active lifecycle status and is ROHS3 compliant.