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MAX31855JASA+ - Analog Devices

Description: Sensor Interface Thermocouple To Digital Converter

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MAX31855JASA+ - Analog Devices - PCB symbol
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MAX31855JASA+ - Analog Devices PCB footprint - Small Outline Packages - Small Outline Packages - so-8+-
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MAX31855JASA+ Details

  • Manufacturer Part Number:

    MAX31855JASA+

  • Brand Name:

    Analog Devices Inc

  • Rohs Code:

    Yes

  • Part Life Cycle Code:

    Active

  • Part Package Code:

    8-SOIC_N-150_MIL

  • Package Description:

    ROHS COMPLIANT, SOP-8

  • Pin Count:

    8

  • Manufacturer Package Code:

    8-SOIC_N-150_MIL

  • Country Of Origin:

    Japan, Mainland China, Malaysia, Philippines, Singapore, South Korea, Taiwan, Thailand, USA

  • HTS Code:

    8542.39.00.01

  • Date Of Intro:

    2011-04-05

  • Manufacturer:

    Analog Devices Inc

  • YTEOL:

    10

  • Analog IC - Other Type:

    ANALOG CIRCUIT

  • JESD-30 Code:

    R-PDSO-G8

  • JESD-609 Code:

    e3

  • Length:

    4.9 mm

  • Moisture Sensitivity Level:

    1

  • Number of Functions:

    1

  • Number of Terminals:

    8

  • Operating Temperature-Max:

    125 °C

  • Operating Temperature-Min:

    -40 °C

  • Package Body Material:

    PLASTIC/EPOXY

  • Package Code:

    SOP

  • Package Equivalence Code:

    SOP8,.25

  • Package Shape:

    RECTANGULAR

  • Package Style:

    SMALL OUTLINE

  • Peak Reflow Temperature (Cel):

    260

  • Qualification Status:

    Not Qualified

  • Seated Height-Max:

    1.75 mm

  • Supply Current-Max (Isup):

    1.5 mA

  • Supply Voltage-Max (Vsup):

    3.6 V

  • Supply Voltage-Min (Vsup):

    3 V

  • Supply Voltage-Nom (Vsup):

    3.3 V

  • Surface Mount:

    YES

  • Temperature Grade:

    AUTOMOTIVE

  • Terminal Finish:

    Matte Tin (Sn) - annealed

  • Terminal Form:

    GULL WING

  • Terminal Pitch:

    1.27 mm

  • Terminal Position:

    DUAL

  • Time@Peak Reflow Temperature-Max (s):

    30

  • Width:

    3.9 mm

MAX31855JASA+ Frequently Asked Questions (FAQs)

  • A good PCB layout for the MAX31855JASA+ involves keeping the analog and digital grounds separate, using a solid ground plane, and minimizing noise coupling between the RTD inputs and the digital signals. A 4-layer PCB with a dedicated analog layer is recommended. See the MAX31855 evaluation board layout as a reference.
  • The MAX31855JASA+ has an internal CJC sensor, but it's recommended to use an external CJC sensor for higher accuracy. Connect the external CJC sensor to the CJC+ and CJC- pins, and make sure to follow the datasheet guidelines for CJC sensor selection and placement.
  • The maximum cable length for the RTD inputs depends on the cable type, RTD type, and noise environment. As a general guideline, keep the cable length below 100 meters for 2-wire RTDs and 50 meters for 3-wire or 4-wire RTDs. Use shielded cables and follow proper termination techniques to minimize noise and errors.
  • Calibration involves adjusting the gain and offset values to match your RTD sensor's characteristics. Use the MAX31855's built-in calibration registers or an external microcontroller to perform a 2-point or 3-point calibration. Refer to the datasheet and application notes for calibration procedures and equations.
  • Power up the MAX31855JASA+ in the following sequence: VCC, AVCC, and then DVCC. This ensures that the analog and digital circuits power up correctly and minimizes the risk of latch-up or damage.

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MAX31855JASA+ Overview

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About Analog Devices

Analog Devices Inc. is a global leader in the design and manufacturing of analog, mixed-signal, and digital signal processing integrated circuits and software solutions for the industrial, automotive, healthcare, communications industries. Analog Devices serves a diverse range of markets including industrial, automotive, healthcare, energy, aerospace, defense, and consumer electronics industries. Analog Devices’ product portfolio includes a wide range of ICs, modules, and subsystems.

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