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QST · exact orderable part

QMI8658A

Six-axis IMU with I3C, I2C and SPI interfaces, ±2 to ±16 g accelerometer range and ±16 to ±2048 dps gyroscope range.

Number of Axes: 6
Interface: I3C; I2C; 3-/4-wire SPI
Accelerometer Full-Scale Range: ±2 g, ±4 g, ±8 g, ±16 g
Gyroscope Full-Scale Range: ±16 dps to ±2048 dps
Minimum Supply Voltage: 1.71 V
Package / Case: LGA14

China-origin manufacturerCommercial terms confirmed per lot

ManufacturerQST

Package / caseLGA14 2.5 × 3.0 × 0.86 mm

Mounting typesurface mount

PackingTape and reel

Temperature grade-40 to 85 °C

Technical parameters

Technical specifications

23 normalized values · 1 manufacturer source

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QMI8658A technical parameters
Parameter	Value
Number of Axes	6 [1]
Interface	I3C; I2C; 3-/4-wire SPI [1]
Minimum Supply Voltage	1.71 V [1]
Maximum Supply Voltage	3.6 V [1]
Package / Case	LGA14 [1]
Accelerometer Full-Scale Range	±2 g, ±4 g, ±8 g, ±16 g [1]
Gyroscope Full-Scale Range	±16 dps to ±2048 dps [1]
Typical Accelerometer Noise Density	150 µg/√Hz typical, high-resolution mode [1]
Typical Gyroscope Noise Density	13 mdps/√Hz typical, high-resolution mode [1]
FIFO Capacity	1536 bytes [1]
Embedded Motion Functions	Pedometer; tap; any-motion; no-motion; significant-motion; wake-on-motion [1]
Embedded Temperature Sensor	Yes [1]
Operating Temperature Range	-40 to 85 °C [1]
Maximum SPI Clock	15 MHz [1]
Maximum I2C Clock	400 kHz [1]
Maximum I3C SDR Clock	12.5 MHz [1]
ESD Rating (HBM)	2000 V [1]
ESD Rating (CDM)	500 V [1]
Typical System Turn-On Time	15 ms [1]
Package Dimensions	2.5 × 3.0 × 0.86 mm [1]
Pin Count	14 [1]
Accelerometer Output Width	16 bit [1]
Gyroscope Output Width	16 bit [1]

Specification references[1]QST QMI8658A Datasheet, Rev A; history through 1.0, 2022-06-20 ↗

Product overview

QMI8658A at a glance

QMI8658A is a six-axis MEMS inertial measurement unit that combines a three-axis accelerometer, a three-axis gyroscope and an embedded motion co-processor. It supports MIPI I3C, I2C and three- or four-wire SPI host interfaces in a 14-pin 2.5 mm × 3.0 mm × 0.86 mm LGA package.

Key features

Verified device capabilities

Programmable accelerometer ranges of ±2 g, ±4 g, ±8 g and ±16 g.
Programmable gyroscope ranges from ±16 dps through ±2048 dps.
1536-byte FIFO buffers sensor samples to reduce host activity and system power.
Embedded pedometer, tap, any-motion, no-motion, significant-motion and wake-on-motion functions.
Typical high-resolution noise density of 150 µg/√Hz for the accelerometer and 13 mdps/√Hz for the gyroscope.

Applications

Where the device is used

Wearable, handheld and human-interface motion sensing.
Industrial orientation, vibration and motion-monitoring equipment.
Low-power systems that can use FIFO buffering and embedded motion detection.

Ordering information

Exact code and packing

The reviewed ordering table lists QMI8658A in LGA14 packaging supplied by tape and reel.

QMI8658A and QMI8658C retain separate evidence records; their gyroscope ranges and noise figures must not be merged.

Design notes

Use the rating in context

The device uses a defined right-handed sensor coordinate system; PCB orientation and software axis mapping must follow the package orientation diagram.

When VDDIO and VDD use separate rails, the manufacturer states that VDDIO must be powered no later than VDD and documents additional ramp requirements.

The 3.6 V absolute maximum is not an operating recommendation; the reviewed operating supply range is 1.71 V to 3.6 V.

Quotation and fulfillment

What is confirmed before an order

Commercial facts belong to the quoted lot. The catalog does not invent live stock, price, date code or lead time.

Exact-part check

Manufacturer, full suffix, package, quantity and requested documentation are captured in the RFQ.

Lot-level quotation

Price, available quantity, date code, condition and lead time are written into the quotation when confirmed.

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Label, marking, packing and traceability requirements can be specified before shipment.

Shipping and payment

Shipping method, Incoterm and available payment route are agreed in the commercial offer.

Technical and ordering FAQ

Questions buyers ask about QMI8658A

Answers distinguish the IC itself from assembled modules and keep absolute limits separate from normal operating conditions.

What sensors are inside QMI8658A?

It combines a three-axis accelerometer and three-axis gyroscope for six-axis inertial measurement.

Which host interfaces are supported?

The datasheet lists MIPI I3C, I2C and three-wire or four-wire SPI.

What is the gyroscope full-scale range?

QMI8658A provides programmable settings from ±16 dps through ±2048 dps.

How large is the sensor FIFO?

The integrated FIFO capacity is 1536 bytes.

Is QMI8658A interchangeable with QMI8658C?

They are separate orderable devices with separate datasheets. At minimum, their documented gyroscope range and noise density differ, so substitution requires an engineering review.

Catalog relationships

Keep family and exact MPN intent separate.

This page describes one orderable part. A family page helps select suffixes but never carries assumed stock or a price.

ManufacturerQSTView brand page →CategoryIMU SensorsView category page →Part familyQMI8658Compare exact variants →

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Every path below passed electrical, package, pinout, firmware and compliance review. The linked verdict controls; similarity alone is not approval.

Engineering validation required

QMI8658C

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