Part Review and Datasheet Validation
Thought for 2 mins 6 sec
Part Review Summary
Datasheet-Derived Part Info
Project Property Review
Schematic Symbol Cross-Check
Existing terminals
Symbol findings
Pin type mismatches
Footprint Cross-Check
What is present in the project
Footprint vs datasheet
Key Specs to Keep With the Part
Mismatches / Gaps Flagged
Bottom Line
I reviewed the part project for SHT41-AD1B-R2 against the official Sensirion datasheet already linked in the project.
Datasheet URL
Table
| Check | Result |
|---|---|
| Datasheet URL present | Yes |
| URL appears official | Yes, Sensirion PDF |
| Project updated | No update needed |
Table
| Field | Datasheet Value |
|---|---|
| MPN | SHT41-AD1B-R2 |
| Manufacturer | Sensirion |
| Package | 4-pin open-cavity DFN |
| Pin count | 4 |
| Interface | I2C, address 0x44 |
| Supply range | 1.08 V to 3.6 V |
| Idle current | 0.08 µA typ, 1.0 µA max |
| Measurement current | 320 µA typ, 500 µA max |
| RH accuracy | ±1.8 %RH typ |
| Temperature accuracy | ±0.2 °C typ |
| RH response time | 4 s |
| Temperature response time | 2 s |
| Body size | 1.5 mm x 1.5 mm x 0.54 mm |
| Pad pitch | 0.8 mm |
| Reference pad size | 0.5 mm x 0.3 mm |
Table
| Property | Current Project Value | Datasheet Check | Status |
|---|---|---|---|
| Manufacturer Part Number | SHT41-AD1B-R2 | Matches | OK |
| Manufacturer Name | Sensirion | Matches | OK |
| Part Type | Sensors | Reasonable | OK |
| Datasheet URL | Set to official Sensirion PDF | Matches | OK |
| Designator Prefix | IC | Acceptable for this part style | OK |
| Package or Case Code | Not present | Datasheet specifies 4-pin DFN | Missing detail |
| Project description | "Board Mount Humidity Sensors Intermediate Humidity and Temperature Sensor" | Broadly correct but not very specific | Could be improved |
Table
Table
| Check | Result |
|---|---|
| Pin count | 4/4, matches datasheet |
| Pin names | Match |
| Pin numbers | Match |
| Symbol completeness | No missing pins found |
| Pin type properties | Mismatch |
All four terminals are currently set to Unspecified in the project, but the datasheet supports more accurate types:
Table
Table
| Check | Result |
|---|---|
| Footprint exists | Yes |
| Pad count | 4 pads present |
| Pad labels | SDA, SCL, VDD, VSS |
| Footprint-level geometry exposed by project data | Limited |
Table
| Check | Result |
|---|---|
| 4-pad package structure | Consistent with datasheet |
| Pad naming consistency | Consistent |
| Exact pad geometry verification | Not fully verifiable from available layout data |
| Datasheet package expectations | 4-pin DFN, 0.8 mm pitch, ref. pad 0.5 mm x 0.3 mm |
| Important land-pattern note | No copper under sensor except pin pads; central die pad should not be soldered |
Table
| Category | Value |
|---|---|
| Function | Humidity and temperature sensor |
| Bus | I2C |
| Fixed address | 0x44 |
| Voltage | 1.08 V to 3.6 V |
| RH accuracy | ±1.8 %RH typ |
| Temp accuracy | ±0.2 °C typ |
| Package | 4-pin DFN |
| Size | 1.5 mm x 1.5 mm x 0.54 mm |
Table
| Item | Severity | Note |
|---|---|---|
| Pin Type properties all set to Unspecified | Medium | Should be corrected for ERC quality |
| Package or Case Code property missing | Low | Should be set to something like 4-pin DFN |
| Description is generic | Low | Could be rewritten to include I2C address and accuracy class |
| Exact footprint geometry not fully confirmed | Medium | Available layout data did not expose pad dimensions/pitch directly |
- MPN, manufacturer, datasheet URL, pin names, pin numbers, and 4-pin structure all look correct.
- The main issue is that the schematic terminals are not typed correctly.
- The footprint appears structurally consistent, but I could not fully confirm exact land-pattern dimensions from the project data alone.
If you want, I can fix the terminal Pin Type properties and add the missing Package or Case Code metadata next.
Fix the mismatches
Check power parts first
Use official datasheets
Include availability check
Welcome 👋
Flux accelerates your PCB design with AI.
Create your account to start using this component and bring your ideas to life.