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MAX31855TASA+T

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Analog Devices Inc Maxim Integrated ADCs/DACs - Special Purpose, SO-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MAX31855TASA+T

Analog Devices Inc Maxim Integrated · ADCs/DACs - Special Purpose · SO-8

MAX31855TASA+T from Analog Devices Inc Maxim Integrated, in a SO-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 GND power_in Ground reference for the device; the datasheet states all voltages are referenced to GND.
2 T- input Thermocouple negative input (wire connections per Table 1); the datasheet says do not connect this pin to GND.
3 T+ input Thermocouple positive input (wire connections per Table 1), with internal circuitry that reduces noise errors from the thermocouple wires.
4 VCC power_in Power-supply voltage, 3.0V to 3.6V (3.3V typical), with absolute maximum range of -0.3V to +4.0V.
5 SCK input Serial-clock input for the SPI-compatible read-only interface, with a maximum serial-clock frequency of 5 MHz.
6 CS input Active-low chip select; drive CS low to enable the serial interface and output data on SO.
7 SO output Serial-data output that delivers the conversion data bits, starting with D31 once CS is driven low and clocked by SCK.
8 DNC unconnected Do Not Connect; leave this pin unconnected.

Key specifications

Parameter Value
Manufacturer Analog Devices Inc Maxim Integrated
Package SO-8
Category Data Acquisition
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Power-Supply Voltage VCC 3 3.3 3.6 V (Note 2) 2
Input Logic 0 VIL -0.3 0.8 V 2
Input Logic 1 VIH 2.1 V 2
Power-Supply Current ICC 900 1500 µA 2
Thermocouple Input Bias Current -100 100 nA TA = -40°C to +125°C, 100mV across the thermocouple inputs 2
Power-On Reset Voltage Threshold VPOR 2 2.5 V (Note 3) 2
Output Low Voltage VOL 0.4 V IOUT = 1.6mA 2
Input Leakage Current ILEAK -1 1 µA (Note 7) 4
Thermocouple Gain and Offset Error, MAX31855T (T-type) -2 2 °C TTHERMOCOUPLE = -270°C to +400°C, TA = -20°C to +85°C (Note 3) 3
Thermocouple Gain and Offset Error, MAX31855T (T-type) -4 4 °C TTHERMOCOUPLE = -270°C to +400°C, TA = -40°C to +125°C (Note 3) 3
Internal Cold-Junction Temperature Error -2 2 °C TA = -20°C to +85°C (Note 3) 4
Internal Cold-Junction Temperature Error -3 3 °C TA = -40°C to +125°C (Note 3) 4
Serial-Clock Frequency fSCL 5 MHz 4
SCK Pulse-High Width tCH 100 ns 4
SCK Pulse-Low Width tCL 100 ns 4
SCK Rise and Fall Time 200 ns 4
CS Fall to SCK Rise tCSS 100 ns 4
SCK to CS Hold 100 ns 4
CS Fall to Output Enable tDV 100 ns 4
CS Rise to Output Disable tTR 40 ns 4
SCK Fall to Output Data Valid tDO 40 ns 4
CS Inactive Time 200 ns (Note 3) 4
Temperature Conversion Time (Thermocouple, Cold Junction, Fault Detection) tCONV 70 100 ms (Note 5) 4
Thermocouple Conversion Power-Up Time tCONV_PU 200 ms (Note 6) 4
Supply Voltage Range (VCC to GND) VCC -0.3 4 V 2
All Other Pins -0.3 V max = VCC + 0.3V 2
ESD Protection (All Pins, Human Body Model) -2 2 kV Human Body Model 2
Operating Temperature Range -40 125 °C 2
Junction Temperature 150 °C 2
Storage Temperature Range -65 150 °C 2
Lead Temperature (soldering) 300 °C 10s 2
Soldering Temperature (reflow) 260 °C 2
Power-On Reset Voltage Hysteresis 0.2 V 2
Power-Supply Rejection -0.3 °C/V 2
Input Capacitance CIN 8 pF 4
Junction-to-Case Thermal Resistance (θJC) θJC 40 °C/W SO package (Note 1) 2

CAD (KiCad official)

  • Symbol: MAX31855TASA+T
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SO-8 (KiCad packages3D, STEP)
  • 3D model files: max31855tasa-t-etched.step / max31855tasa-t-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max31855tasa-t.step / max31855tasa-t.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Analog Devices Inc Maxim Integrated datasheet (13 pp, sha256 0da8c21e66d26950, retrieved 2026-10-18, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF