Part Validation Review
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MAXM86161AEFD+ Part Validation Review
Date: 2026-07-22 Official datasheet set on project: https://www.analog.com/media/en/technical-documentation/data-sheets/maxm86161a.pdf
Completed the part review and saved the detailed findings in MAXM86161AEFD+ Part Validation Review.
Open items:
- Datasheet URL was already set to the official Analog Devices PDF; no update was needed.
- Pinout and footprint geometry match the datasheet.
- Main issues flagged: missing pin descriptions, all pin types set to
Unspecified, and package metadata is underspecified asModuleinstead of14-pin OLGA / F142A4-1.
Suggested next steps:
- Add datasheet-backed
Pin Descriptionvalues for all 14 terminals. - Assign proper electrical pin types for ERC.
- Update package metadata to
14-pin OLGA, package codeF142A4-1, land pattern90-100106.
Fix metadata and review
Add pin descriptions
Assign pin types
Update package metadata
Run ERC DRC
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MAXM86161AEFD+ Part Validation Review
Date: 2026-07-22
Reference Source
- Official datasheet set on project: https://www.analog.com/media/en/technical-documentation/data-sheets/maxm86161a.pdf
- Manufacturer: Analog Devices
- Reviewed part: MAXM86161AEFD+
Current Part Information Observed in Flux
Table
| Field | Current value | Datasheet reference | Status |
|---|---|---|---|
| Manufacturer Part Number | MAXM86161AEFD+ | MAXM86161AEFD+ ordering option | Match |
| Manufacturer Name | Analog Devices | Analog Devices | Match |
| Description | Single-Supply Integrated Optical Module for HR and SpO2 Measurement | Datasheet title/general description | Match |
| Datasheet URL | Analog Devices MAXM86161A PDF | Official Analog Devices PDF | Match; no update needed |
| Pin / pad count | 14 | 14-pin OLGA | Match |
| Package or Case Code | Module | 4.3 mm x 2.9 mm x 1.4 mm, 14-pin OLGA; package code F142A4-1 | Underspecified; recommend 14-pin OLGA / F142A4-1 |
Key Datasheet Specs
Table
| Category | Datasheet value |
|---|---|
| Function | Integrated optical data-acquisition module for heart-rate and SpO2 measurement |
| Package | 4.3 mm x 2.9 mm x 1.4 mm, 14-pin OLGA |
| Package code | F142A4-1 |
| Outline / land pattern | Outline 21-100309; land pattern 90-100106 |
| Operating temperature | -40°C to +85°C |
| Supply | VLED 3.0 V to 5.5 V single supply |
| Internal LDO output | VLDO 1.8 V typ, 1.68 V to 1.92 V |
| Reference | VREF 1.210 V typ, 1.195 V to 1.220 V |
| Interface | I2C, 0 kHz to 400 kHz; write address C4h, read address C5h |
| ADC | 19-bit current-mode / charge-integrating ADC |
| LED drivers | Three 8-bit LED current DACs; full-scale ranges 31 / 62 / 93 / 124 mA |
| FIFO | Datasheet text describes 128-word FIFO; block diagram text shows 256-word FIFO, so verify intended interpretation in firmware docs |
| Ambient rejection | 200 µA DC ambient rejection typ; >70 dB ambient rejection at 120 Hz listed in features |
| Integration times | 14.8 µs, 29.4 µs, 58.7 µs, 117.3 µs |
| PPG sample rate | 8 sps to 4096 sps |
| Photodiode | Peak sensitivity 860 nm; spectral range 420 nm to 1020 nm |
| Integrated LEDs | Green, IR, red emitters; green 520 nm to 535 nm, IR 880 nm typ, red 660 nm typ |
Pinout Cross-Check
Table
| Pin | Flux terminal | Datasheet name | Datasheet function | Status |
|---|---|---|---|---|
| 1 | SDA | SDA | I2C data input/output | Match |
| 2 | SCL | SCL | I2C clock input | Match |
| 3 | LDO_EN | LDO_EN | LDO enable; high = on, low = shutdown | Match |
| 4 | VLDO | VLDO | Internal LDO output; bypass with 1 µF to GND_ANA | Match |
| 5 | VLED | VLED | LED power supply input; bypass with 10 µF to PGND | Match |
| 6 | N.C._1 | N.C. | Internally connected to LED3_DRV / red LED cathode; solder for mechanical stability; do not connect | Name acceptable, description missing |
| 7 | N.C._2 | N.C. | Internally connected to LED2_DRV / IR LED cathode; solder for mechanical stability; do not connect | Name acceptable, description missing |
| 8 | N.C._3 | N.C. | Internally connected to LED1_DRV / green LED cathode; solder for mechanical stability; do not connect | Name acceptable, description missing |
| 9 | PGND | PGND | LED power return; connect to PCB ground | Match |
| 10 | GND_DIG | GND_DIG | Digital logic/pad return; connect to PCB ground | Match |
| 11 | GND_ANA | GND_ANA | Analog power return; connect to PCB ground | Match |
| 12 | VREF | VREF | Internal reference decoupling point; bypass with 1 µF to GND_ANA | Match |
| 13 | GPIO | GPIO | General-purpose I/O; open-drain when output, active-low | Match |
| 14 | INTB | INTB | Open-drain interrupt | Match |
Schematic Symbol Review
- Terminal names and pin numbers match the datasheet pin table.
- The repeated N.C. pins are uniquely named N.C._1, N.C._2, and N.C._3 in Flux. This is acceptable for unique designators, but their descriptions should preserve the datasheet warning that they are internally connected LED cathode nodes and must not be tied to ground or signals.
- All terminal
Pin Typeproperties are currentlyUnspecified. This is a quality issue because ERC cannot distinguish I2C I/O, open-drain outputs, power pins, grounds, no-connect pins, and passive/reference decoupling nodes. - No
Pin Descriptionproperties are set on the terminals. This is the main symbol metadata gap.
Recommended pin-type assignments:
Table
| Pin | Name | Recommended pin type / modeling note |
|---|---|---|
| 1 | SDA | Bidirectional or open-drain I/O |
| 2 | SCL | Input; I2C clock |
| 3 | LDO_EN | Input |
| 4 | VLDO | Power output / regulator output / passive decoupling node |
| 5 | VLED | Power input |
| 6-8 | N.C. | No-connect; solder pad present, do not connect electrically |
| 9 | PGND | Ground / power return |
| 10 | GND_DIG | Ground / power return |
| 11 | GND_ANA | Ground / power return |
| 12 | VREF | Passive/reference decoupling node or power output reference |
| 13 | GPIO | Bidirectional/open-drain-capable I/O |
| 14 | INTB | Open-drain output |
Footprint Review
Datasheet/package references:
- Package: 14-pin OLGA, 4.3 mm x 2.9 mm x 1.4 mm
- Package code: F142A4-1
- Outline: 21-100309
- Land pattern: 90-100106
- Recommended land-pattern values: pad size 0.660 mm x 0.400 mm, pitch 0.600 mm, row spacing 1.900 mm, pad-array length 3.600 mm
Flux footprint/KiCad asset observed:
- 14 pads present.
- Pad centers: two rows at x = ±0.950 mm, giving 1.900 mm row spacing.
- Pad y positions: ±1.8, ±1.2, ±0.6, 0 mm, giving 0.600 mm pitch and 3.600 mm end-to-end array length.
- Pad definition: size 0.400 mm x 0.660 mm with 90° rotation. With the 90° pad rotation, the effective global dimensions are 0.660 mm across the row direction and 0.400 mm along the pitch direction, matching the datasheet land pattern.
- Fab outline: 2.9 mm x 4.3 mm, matching package body size.
- Pin-1 marker is near pad 1 at the top-left side of the footprint, consistent with the datasheet top-view pinout.
Footprint status: no footprint geometry mismatch found from the available data. The pad dimensions initially look transposed if the 90° pad rotation is ignored, but the rotated effective geometry matches the land pattern.
Mismatches / Issues Flagged
- Pin descriptions missing: all terminal descriptions are absent. Add datasheet pin functions, especially the N.C. warnings for pins 6-8.
- Pin types unspecified: every terminal has
Pin Type: Unspecified. Assign electrical pin types so ERC can catch real errors. - Package metadata underspecified:
Package or Case Codeis currentlyModule; the datasheet-specific package is14-pin OLGA, package codeF142A4-1, land pattern90-100106. - FIFO size note: the datasheet text says 128-word FIFO while one block-diagram extraction showed 256-word FIFO. Treat 128-word FIFO as the safer quoted feature unless Analog Devices clarifies otherwise.
Overall Verdict
The MPN, manufacturer, datasheet URL, description, pin count, schematic pin numbers/names, and footprint land-pattern geometry are consistent with the Analog Devices datasheet. The main gaps are metadata quality issues: missing pin descriptions, unspecified electrical pin types, and an underspecified package/case property.
Reference Source
Current Part Information Observed in Flux
Key Datasheet Specs
Pinout Cross-Check
Schematic Symbol Review
Footprint Review
Mismatches / Issues Flagged
Overall Verdict
