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Analog Devices MAX31855JASA+ — Discrete Semiconductors
Analog Devices

MAX31855JASA+ Thermocouple to Digital Converter, J-Type

MPNMAX31855JASA+
End of Life

Maxim Integrated MAX31855JASA+, Thermocouple to Digital Converter, J-Type Input, Digital Output, 8-SOIC Package, -40°C to 125°C, 900 µA Supply.

$10.5Ref. price · indicative, final on quote
MAX31855JASA+ datasheet
Packaging8-SOIC (0.154", 3.90mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

MAX31855JASA+ Technical Specifications
ParameterValue
TypeThermocouple to Digital Converter
Input typeThermocouple (J)
Output typeDigital
Mounting typeSurface Mount
Current - supply900 µA
Operating temperature-40°C ~ 125°C
PackageTube
Case8-SOIC (0.154\", 3.90mm Width)

Product details

What this part is and where it fits

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 part comes in an 8-SOIC surface-mount package and operates across -40°C to 125°C, making it suitable for industrial process control, HVAC, engine monitoring, and other harsh-environment temperature sensing where a J-type probe is specified.

Package and mounting

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. The -40°C to 125°C operating range covers both the cold end of a freezer line and the hot side of an engine bay.

Lifecycle and sourcing posture

This part is listed as Active with ROHS3 compliance, so there is no last-time-buy clock ticking. No production-status uncertainty here.

Frequently asked questions

Is MAX31855JASA+ equivalent to MAX31855KASA+?

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.

Where can I buy MAX31855JASA+?

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.