Part Datasheet Review and Verification

Thought for 2 mins 13 sec

I found the official datasheet URL and prepared the Datasheet property update to:

Part metadata review

Table

Field	Result
MPN	ICM-40609-D
Manufacturer	TDK InvenSense
Device type	6-axis MEMS MotionTracking device
Function	3-axis gyroscope + 3-axis accelerometer
Interfaces	I2C, 4-wire SPI, 3-wire SPI
Package	24-lead LGA, 3.0 mm x 3.0 mm x 0.91 mm nominal, NiAu pad finish
Thickness	0.85 mm min, 0.91 mm nom, 0.97 mm max
Pin count	24
Project state	Symbol terminals and footprint exist; no nets defined yet
Existing metadata gap	`Datasheet` property is not currently set

Key features from the datasheet

Table

Feature	Value
Max ODR	32 kHz
Gyro full-scale range	±15.625 dps to ±2000 dps
Accel full-scale range	±4 g to ±32 g
Gyro noise density	0.0045 dps/√Hz
Accel noise density	100 µg/√Hz
6-axis low-noise current	0.77 mA typ
Sleep current	11 µA typ
Operating supply	VDD 1.71 V to 3.6 V, VDDIO 1.71 V to 3.6 V
Temperature range	-40 C to +85 C

Absolute maximum ratings

Table

Parameter	Rating
VDD	-0.5 V to +4 V
VDDIO	-0.5 V to +4 V
FSYNC / SCL / SDA input voltage	-0.5 V to VDDIO + 0.5 V
Acceleration, any axis, unpowered	20,000 g for 0.2 ms
Operating temperature	-40 C to +85 C
Storage temperature	-40 C to +125 C
ESD	2 kV HBM, 200 V MM
Latch-up	JEDEC Class II (2), 125 C, ±100 mA

Recommended operating conditions and electrical characteristics

Table

Parameter	Value
VDD	1.71 V to 3.6 V
VDDIO	1.71 V to 3.6 V
Specified operating temperature	-40 C to +85 C
Supply ramp time	0.01 ms min to 3 ms max
Power supply noise	10 mV peak-to-peak
I2C max clock	1 MHz
SPI max clock	24 MHz

Gyroscope characteristics

Table

Parameter	Value
ADC resolution	16 bits
Full-scale settings	±2000, ±1000, ±500, ±250, ±125, ±62.5, ±31.25, ±15.625 dps
Sensitivity initial tolerance	±0.5 %
Sensitivity variation over temp	±0.045 %/C
ZRO initial tolerance	±1 dps
ZRO temp drift	±0.01 dps/C
Cross-axis sensitivity	±1 %
RMS noise, 100 Hz BW	0.045 dps-rms
Startup time	30 ms typ

Accelerometer characteristics

Table

Parameter	Value
ADC resolution	16 bits
Full-scale settings	±32 g, ±16 g, ±8 g, ±4 g
Sensitivity initial tolerance	±0.5 %
Sensitivity temp variation	±0.007 %/C
Zero-g initial tolerance	±40 mg
Zero-g temp drift	±0.15 mg/C
Cross-axis sensitivity	±1 %
RMS noise, 100 Hz BW	1.00 mg-rms
Startup time	10 ms typ

Power and external component requirements

Table

Item	Datasheet requirement
VDD bypass	0.1 µF X7R ±10 % and 2.2 µF X7R ±10 %
VDDIO bypass	10 nF X7R ±10 %
I2C pull-ups	Required, example 10 kΩ
Reserved pins	Must be tied to GND
NC pins	Must remain unconnected
FSYNC if selected but unused	Tie to GND

Pin descriptions

Table

Pin	Symbol terminal in project	Datasheet function
8	VDDIO	Digital I/O supply voltage
9	AD0/SDO	I2C address LSB / SPI data output
11	RESV	Reserved, connect to GND
12	INT1/INT	Interrupt output
13	VDD	Main supply voltage
18	GND	Ground
19	INT2/FSYNC	Interrupt 2 / frame sync input
20	RESV__1	Reserved, connect to GND
22	~CS	SPI chip select
23	SCL/SCLK	I2C clock / SPI clock
24	SDA/SDI/SDIO	I2C data / SPI data input / 3-wire SPI data I/O

All remaining 13 pins are no-connect pins and should not be connected.

Symbol and footprint cross-check

Table

Check	Result	Risk
MPN vs project	Matches ICM-40609-D	Low
Pin count	Symbol has 24 terminals; package is 24-lead LGA	Low
Active pin numbering	Checked active pins match datasheet numbering	Low
NC population	Project includes the correct count of NC pins	Low
Reserved pins	Both reserved pins are present as RESV and RESV__1	Medium if later left floating
Pin types	Mostly reasonable; dual-function pins are modeled acceptably	Low
Package size	Footprint is consistent with 3.0 mm x 3.0 mm package body	Low
Pitch	Footprint pad pitch is consistent with 0.4 mm BSC	Low
Pad sizes	Straight pads appear consistent with 0.2 mm x 0.3 mm nominal package pad geometry	Low
Corner pads	Custom corner-pad shapes appear intentional and compatible with the package corner geometry	Medium, should still be visually overlaid
Pin 1 marking	Footprint includes a pin 1 marker; datasheet also requires pin 1 identification	Low
Datasheet property	Missing from project metadata	Medium for traceability / ordering / review workflows
Package thickness metadata	Project description mentions 0.97 mm, but datasheet nominal is 0.91 mm and 0.97 mm is max	Low, metadata cleanup recommended

Flags that matter

No hard symbol pinout mismatch jumped out from the current project data.
No obvious footprint pitch or body-size mismatch jumped out from the current footprint.
The biggest real risks are:
- Missing Datasheet property
- Reserved pins not being explicitly documented as must-connect-to-GND
- Future misuse of NC pins
- The footprint cannot be proven perfect from the datasheet alone because the PDF gives package dimensions, but not a separate recommended PCB land-pattern table

Bottom line

This part project looks mostly consistent with the official datasheet.
I do not see an obvious pin-count, package-family, or gross footprint mismatch that would obviously cause board failure.
I do recommend applying the datasheet URL update and treating the reserved-pin grounding requirements as mandatory metadata for this part.

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