cherepanyadima / 269

Loaded

0

0

0

Files

Schematic

PCB

Log InSign Up

Part Review and Datasheet Update

flux

4:35

Searching for datasheet details.

Checking the bill of materials.

Analyzing the PCB layout.

Analyzing the schematic.

Identifying terminal pins.

Searching the project.

Researching 3 web sources.

Searching properties.

Interpreting blank entries.

Searching 2 domains.

Found 1 results.

Found 1 results.

Found 1 results.

Clarifying property requirements.

Search complete — 29 results across 2 domains.

Researching 2 web sources.

Found 1 results.

Found 1 results.

Looking for "Identify the product, list all interface pin names and functions, give supply voltage, logic output voltage, measurement range, accuracy statements, and any mechanical dimensions or board size mentioned." in thermocouple.pdf

Looking for "Extract the breakout board pin descriptions, note the exact pin labels shown on the board, identify any shield or mounting pad descriptions, and mention board dimensions if provided." in connecting-the-max31855-thermocouple-amplifier-breakout-to-an-electric-imp.pdf

Extracting MAX31855 specs.

Searching the project.

Analyzing the PCB layout.

Identifying project components.

Searching 4 domains.

Looking for "Extract the exact device name, package, pin count, key electrical specs, thermocouple type support, supply range, operating temperature range, interface type, and any accuracy/resolution data." in MAX31855.pdf

Looking for "Give the IC pin table with pin numbers, pin names, and functions for the MAX31855 chip." in MAX31855.pdf

Inspecting asset details.

Searching 3 domains.

Searching component metadata.

Searching 3 domains.

Searching for datasheet.

Searching properties.

Assessing project data.

Search complete — 122 results across 5 domains.

Review complete
I reviewed the current part project using the part-project datasheet-sync workflow, which requires using the datasheet as the source of truth and checking that the project pin count matches the documented interface exactly
I also updated the missing Datasheet URL property to the official chip datasheet:
  • MAX31855 datasheet
Current project metadata

Existing project properties

PropertyCurrent valueStatus
Manufacturer Part Number269Present
Manufacturer NameAdafruitPresent
Designator PrefixUPresent
Datasheet URLset to official MAX31855 PDFUpdated
What this part appears to be
Adafruit product 269 is the Thermocouple Amplifier MAX31855 breakout board, not just the bare MAX31855 IC.
Key specs from the official datasheet and Adafruit docs

Device / board summary

ItemValue
Core ICMAX31855
FunctionCold-junction compensated thermocouple-to-digital converter
InterfaceRead-only SPI-compatible
Resolution0.25 °C thermocouple reading
Supported thermocouple typesK, J, N, T, S, R, E
IC supply range3.0 V to 3.6 V
IC operating temperature-40 °C to +125 °C
Typical K-type accuracy±2 °C from -200 °C to +700 °C
K-type measurement rangeup to -200 °C to +1350 °C for the K variant
Conversion timeabout 70 ms to 100 ms

Breakout interface notes

PinBoard meaning
VINMain board power input, 3 V to 5 V on breakout
3VO3.3 V rail on breakout; Adafruit docs also show it can be used to power the board directly at 3.3 V
GNDGround
CLKSPI clock input
DOSPI data output
~CSActive-low chip select input
Cross-check results

Symbol vs datasheet / board docs

CheckResultNotes
Host-side SPI pins presentMostly yesVIN, 3VO, GND, CLK, DO, ~CS match the breakout interface
Thermocouple connection pins in symbolMismatchThe breakout board also has the thermocouple terminal connection, but the schematic symbol only shows 6 pins
Symbol pin count vs footprint pad countMismatchSymbol has 6 terminals; footprint has 8 pads total
Pin descriptions populatedMismatchNo terminal has a readable pin description property yet
Pin numbers presentYes1 to 6 assigned on current symbol
Footprint cross-check Observed footprint pads
  • Main pads: VIN, 3VO, GND, CLK, DO, ~CS
  • Extra pads: SH1, SH2
Assessment
This strongly suggests the footprint includes the 2-pin thermocouple terminal block, while the schematic symbol currently exposes only the 6 host-interface pins.
So if this project is intended to represent the Adafruit breakout board, the footprint is closer to correct than the symbol, and the symbol is incomplete.
Pin-type and property mismatches

Current terminal audit

TerminalCurrent pin typeExpected / better typeStatus
VINPower InPower InOK
3VOPower InAmbiguous board power rail; current type is defensible but description is missingNeeds clarification
GNDPower InGroundMismatch
CLKInputInputOK
DOOutputOutputOK
~CSInputInputOK
Metadata gaps / concerns

Flagged issues

AreaFinding
MPN269 is an Adafruit product number, not the IC MPN
PackageNo package/case code is set
DescriptionCurrent description is not usable as a part summary
Datasheet typeCurrent datasheet is for the IC, not a full board mechanical datasheet
Part identityProject appears to mix breakout-board identity with chip datasheet metadata
Recommended interpretation
You should choose one of these two models:
Option A: Model the Adafruit breakout board
  • Keep MPN as 269
  • Keep manufacturer as Adafruit
  • Keep the breakout footprint
  • Add the 2 thermocouple terminals to the schematic symbol
  • Use board-oriented descriptions for pins and part summary
Option B: Model the bare MAX31855 IC
  • Change MPN to the exact MAX31855 variant
  • Change manufacturer to Maxim/Analog Devices
  • Use the 8-pin SO package
  • Replace the breakout footprint
  • Replace symbol pins with IC pins: GND, T-, T+, VCC, SCK, CS, SO, DNC
Bottom line

Main mismatches flagged

PriorityIssue
HighSymbol has 6 pins, but the current footprint has 8 pads
HighGND is typed as Power In instead of Ground
HighSymbol likely omits the thermocouple terminal connections
MediumPin descriptions are missing
MediumPart metadata mixes breakout-board product data with bare-chip datasheet data
Low3VO needs a clearer description because it behaves as a 3.3 V board rail, not just a generic input
If you want, I can next fix the part project so it consistently represents the Adafruit breakout board: add the missing thermocouple pins, correct pin types/descriptions, and clean up the metadata.
Fix all mismatches
Update missing datasheets
Clean up footprints
16 days

Set Datasheet URL to "https://cdn-shop.adafruit.com..."

Set Datasheet URL to "https://cdn-shop.adafruit.com/datasheets/MAX31855.pdf"

16 days
​
Sign up to send

Reviews

  • Ground
    Ground
    A common return path for electric current. Commonly known as ground.
    jharwinbarrozo
    20.5M
  • Net Portal
    Net Portal
    Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
    jharwinbarrozo
    43.0M
  • Power Net Portal
    Power Net Portal
    Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
    jharwinbarrozo
    11.4M
  • Generic Resistor
    Generic Resistor
    A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibrary
    jharwinbarrozo
    1.5M
  • Generic Capacitor
    Generic Capacitor
    A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF, 10pF, 100pF, 1000pF, 0.01uF, 0.1uF, 1.0uF, 10uF, 100uF, 1000uF, 10000uF 1.1pF, 11pF, 110pF, 1100pF 1.2pF, 12pF, 120pF, 1200pF 1.3pF, 13pF, 130pF, 1300pF 1.5pF, 15pF, 150pF, 1500pF, 0.015uF, 0.15uF, 1.5uF, 15uF, 150uF, 1500uF 1.6pF, 16pF, 160pF, 1600pF 1.8pF, 18pF, 180pF, 1800pF 2.0pF, 20pF, 200pF, 2000pF 2.2pF, 22pF, 220pF, 2200pF, 0.022uF, 0.22uF, 2.2uF, 22uF, 220uF, 2200uF 2.4pF, 24pF, 240pF, 2400pF 2.7pF, 27pF, 270pF, 2700pF 3.0pF, 30pF, 300pF, 3000pF 3.3pF, 33pF, 330pF, 3300pF, 0.033uF, 0.33uF, 3.3uF, 33uF, 330uF, 3300uF 3.6pF, 36pF, 360pF, 3600pF 3.9pF, 39pF, 390pF, 3900pF 4.3pF, 43pF, 430pF, 4300pF 4.7pF, 47pF, 470pF, 4700pF, 0.047uF, 0.47uF, 4.7uF, 47uF, 470uF, 4700uF 5.1pF, 51pF, 510pF, 5100pF 5.6pF, 56pF, 560pF, 5600pF 6.2pF, 62pF, 620pF, 6200pF 6.8pF, 68pF, 680pF, 6800pF, 0.068uF, 0.68uF, 6.8uF, 68uF, 680uF, 6800uF 7.5pF, 75pF, 750pF, 7500pF 8.2pF, 82pF, 820pF, 8200pF 9.1pF, 91pF, 910pF, 9100pF #generics #CommonPartsLibrary
    jharwinbarrozo
    1.5M
  • Generic Inductor
    Generic Inductor
    A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
    jharwinbarrozo
    15.9k
  • Terminal
    Terminal
    An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
    natarius
  • RMCF0805JT47K0
    RMCF0805JT47K0
    General Purpose Thick Film Standard Power and High-Power Chip Resistor 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film Features: - RMCF – standard power ratings - RMCP – high power ratings - Nickel barrier terminations standard - Power derating from 100% at 70ºC to zero at +155ºC - RoHS compliant, REACH compliant, and halogen free - AEC-Q200 compliant
    jharwinbarrozo
    1.2M
  • 875105359001
    875105359001
    10 µF 16 V Aluminum - Polymer Capacitors Radial, Can - SMD 30mOhm 2000 Hrs @ 105°C #commonpartslibrary #capacitor #aluminumpolymer #radialcan
    jharwinbarrozo
    1.2M
  • CTL1206FYW1T
    CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric)
    jharwinbarrozo
    1.1M

269

269 thumbnail
MAX31855 - Thermal Management Power Management Evaluation Board adafruit MAX31855

Properties

269

Adafruit

Evaluation Boards

cdn-shop.adafruit.com/datasheets/MAX31855.pdf

U

parametric-v1

Pricing & Availability

See prices from popular manufacturers for your project.

Controls

Welcome 👋

Flux accelerates your PCB design with AI.

Create your account to start using this component and bring your ideas to life.

      Introducing AI Placement!
      AI Placement Demo

      AI-Powered Component Placement

      Let AI place your components intelligently. AI Placement analyzes your schematic and positions components for optimal routing, signal integrity, and board density.

      From Schematic to Layout in Seconds

      Skip the tedious manual placement. AI Placement generates a starting layout you can refine, saving hours of repetitive work on every new design.

      Works With Auto-Layout

      Pair AI Placement with Auto-Layout for a complete AI-driven PCB design flow — from component placement through trace routing, all with one click.

      Try it