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MAX31856MUD+

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Analog Devices Inc Maxim Integrated ADCs/DACs - Special Purpose, TSSOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MAX31856MUD+

Analog Devices Inc Maxim Integrated · ADCs/DACs - Special Purpose · TSSOP-14

MAX31856MUD+ from Analog Devices Inc Maxim Integrated, in a TSSOP-14. 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 AGND power_in Analog ground reference for the thermocouple front end and the analog supply AVDD.
2 BIAS power_out Bias voltage source nominally 0.735V that sets the common-mode voltage of T-; it is floating when no conversions are taking place.
3 T- input Thermocouple negative input, biased to approximately 0.735V by BIAS; see Table 1 of the datasheet for input configuration.
4 T+ input Thermocouple positive input, protected against overvoltage up to ±45V.
5 AVDD power_in Analog positive supply, to be bypassed with a 0.1µF capacitor to AGND.
6 DNC unconnected Do Not Connect; leave this pin unconnected.
7 DRDY output Data Ready output that signals when a new conversion result is available.
8 DVDD power_in Digital positive supply, to be bypassed with a 0.1µF capacitor to DGND.
9 CS input Chip Select; set low to enable the serial interface.
10 SCK input Serial clock input for the SPI-compatible interface.
11 SDO output Serial data output of the SPI-compatible interface.
12 SDI input Serial data input of the SPI-compatible interface.
13 FAULT output Output that flags cable, thermocouple, or temperature faults.
14 DGND power_in Digital ground reference for the digital supply DVDD.

Key specifications

Parameter Value
Manufacturer Analog Devices Inc Maxim Integrated
Package TSSOP-14
Category Data Acquisition
Pins 14

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 VAVDD, VDVDD 3 3.3 3.6 V 2
AVDD-DVDD AVDD-DVDD -100 100 mV 2
Cable Resistance RCABLE 40 kΩ Per lead 2
Input Logic 0 VIL 0.8 V 2
Input Logic 1 VIH 2.1 V 2
Supply Current, Standby IDD 5.25 10 µA Standby 2
Supply Current, Active Conversion IDD 1.2 2 mA Active conversion 2
Thermocouple Input Bias Current ITCBIAS -10 10 nA TA = +25°C 2
Thermocouple Input Bias Current ITCBIAS -10 65 nA TA = -40°C to +85°C 2
Thermocouple Input Bias Current ITCBIAS -20 110 nA TA = -55°C to +105°C 2
Thermocouple Input Bias Current ITCBIAS -20 400 nA TA = -55°C to +125°C 2
Thermocouple Input Differential Bias Current ITCIDBIAS -0.2 0.2 nA TA = +25°C 3
Thermocouple Input Differential Bias Current ITCIDBIAS -4 4 nA TA = -40°C to +85°C 3
Thermocouple Input Differential Bias Current ITCIDBIAS -5.5 5.5 nA TA = -55°C to +105°C 3
Thermocouple Input Differential Bias Current ITCIDBIAS -10 10 nA TA = -55°C to +125°C 3
Power-On-Reset Voltage Threshold VPOR 2.7 2.85 V 3
Input Common-Mode Range 0.5 1.4 V 3
Full-Scale and INL Error -0.05 0.05 %FS TA = +25°C 3
Full-Scale and INL Error -0.15 0.15 %FS TA = -20°C to +85°C 3
Full-Scale and INL Error -0.2 0.2 %FS TA = -40°C to +105°C 3
Full-Scale and INL Error -0.3 0.3 %FS TA = -40°C to +125°C 3
Full-Scale and INL Error -0.35 0.35 %FS TA = -55°C to +125°C 3
Input Offset Voltage -0.01 0.01 %FS TA = +25°C 3
Input Offset Voltage -0.015 0.015 %FS TA = -20°C to +85°C 3
Input Offset Voltage -0.017 0.017 %FS TA = -40°C to +105°C 3
Input Offset Voltage -0.02 0.02 %FS TA = -55°C to +125°C 3
Input Offset Voltage -7.8 7.8 µV AV = 8; TA = +25°C 3
Input Offset Voltage -11.7 11.7 µV AV = 8; TA = -20°C to +85°C 3
Input Offset Voltage -13.3 13.3 µV AV = 8; TA = -40°C to +105°C 3
Input Offset Voltage -15.6 15.6 µV AV = 8; TA = -55°C to +125°C 3
Input Offset Voltage -2 2 µV AV = 32; TA = +25°C 3
Input Offset Voltage -2.9 2.9 µV AV = 32; TA = -20°C to +85°C 3
Input Offset Voltage -3.3 3.3 µV AV = 32; TA = -40°C to +105°C 3
Input Offset Voltage -3.9 3.9 µV AV = 32; TA = -55°C to +125°C 3
Cold-Junction Temperature Error -0.7 0.7 °C TA = -20°C to +85°C 3
Cold-Junction Temperature Error -1 1 °C TA = -40°C to +105°C 3
Cold-Junction Temperature Error -2 2 °C TA = -55°C to +125°C 3
Undervoltage Falling Edge Threshold -0.3 -0.17 0 V 4
Thermocouple Linearity Correction Error, Type B -0.24 0.25 °C TA = 0 to 125°C, TTC = 95°C to +1798°C 4
Thermocouple Linearity Correction Error, Type E -0.14 0.06 °C TA = -55°C to +125°C, TTC = -200°C to +1000°C 4
Thermocouple Linearity Correction Error, Type J -0.11 0.1 °C TA = -55°C to +125°C, TTC = -210°C to +1200°C 4
Thermocouple Linearity Correction Error, Type K -0.13 0.12 °C TA = -55°C to +125°C, TTC = -200°C to +1372°C 4
Thermocouple Linearity Correction Error, Type N -0.09 0.08 °C TA = -55°C to +125°C, TTC = -200°C to +1300°C 4
Thermocouple Linearity Correction Error, Type R -0.19 0.17 °C TA = -50°C to +125°C, TTC = -50°C to +1768°C 4
Thermocouple Linearity Correction Error, Type S -0.16 0.2 °C TA = -50°C to +125°C, TTC = -50°C to +1768°C 4
Thermocouple Linearity Correction Error, Type T -0.07 0.07 °C TA = -55°C to +125°C, TTC = -200°C to +400°C 4
Temperature Conversion Time (Thermocouple + Cold Junction), 1-shot or first conversion tCONV 143 155 ms 1-Shot conversion or first conversion in auto-conversion mode (60Hz) 4
Temperature Conversion Time (Thermocouple + Cold Junction), 1-shot or first conversion tCONV 169 185 ms 1-Shot conversion or first conversion in auto-conversion mode (50Hz) 4
Temperature Conversion Time (Thermocouple + Cold Junction), auto conversions 2 through n tCONV 82 90 ms Auto conversion mode, conversions 2 through n (60Hz) 4
Temperature Conversion Time (Thermocouple + Cold Junction), auto conversions 2 through n tCONV 98 110 ms Auto conversion mode, conversions 2 through n (50Hz) 4
Common-Mode Rejection CMR 70 dB 0.5V ≤ VCM ≤ 1.4V 5
Input Leakage Current ILEAK -1 1 µA All pins except T+ and T- (Note 5) 5
Output Low Voltage VOL 0.4 V IOUT = 1.6mA 5
Supply Voltage (AVDD, DVDD) absolute maximum AVDD, DVDD -0.3 4 V 2
Thermocouple Input Voltage (T+, T-, Bias) T+, T-, Bias -45 45 V 2
Thermocouple Input Current (T+, T-, Bias) T+, T-, Bias -20 20 mA 2
Operating Temperature Range -55 125 °C 2
Junction Temperature 150 °C 2
Storage Temperature Range -65 150 °C 2

CAD (KiCad official)

  • Symbol: MAX31856MUD+
  • Footprint: Package_SO:TSSOP-14_4.4x5mm_P0.65mm
  • 3D model: TSSOP-14 (KiCad packages3D, STEP)
  • 3D model files: max31856mud-etched.step / max31856mud-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); max31856mud.step / max31856mud.glb are the bare package body.

Provenance

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

  • Datasheet: Analog Devices Inc Maxim Integrated datasheet (30 pp, sha256 385702a94433d75e, 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