BMA250 Accelerometer: Equivalent & Substitute Parts

Part Overview

The BMA250 is a digital three-axis accelerometer manufactured by Bosch Sensortec, designed for motion sensing applications requiring selectable acceleration ranges and dual communication interfaces. The device supports ±2g, 4g, 8g, and 16g measurement ranges with I2C and SPI output protocols in a compact 12-LGA surface mount package.

The BMA250 has reached obsolete product status. Identifying equivalent substitute components is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this accelerometer.

Substiute Parts

BMA250

Bosch SensortecIn Stock: 105273BMA250 Datasheet

Current PartRFQ

IIS2DHTR

STMicroelectronicsIn Stock: 1000346IIS2DHTR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute components for the BMA250 are identified based on strict parameter matching across the following criteria:

Primary Substitution Criteria:

• Identical acceleration range capability (±2g, 4g, 8g, 16g)
• Identical communication interfaces (I2C and SPI support)
• Identical measurement axes (X, Y, Z)
• Compatible package type (12-LGA 2x2)
• Compatible supply voltage range (minimum 1.62V operation)
• Compatible operating temperature range (-40°C ~ 85°C)
• Surface mount mounting type

Secondary Compatibility Factors:

• Sensitivity values (LSB/g) within acceptable tolerance for application-level compatibility
• Bandwidth range that encompasses or exceeds the original specification
• Feature set that includes adjustable bandwidth and selectable scale

The IIS2DHTR from STMicroelectronics meets all primary substitution criteria and demonstrates enhanced performance characteristics in bandwidth capability.

Parameter Comparison

Engineering Selection Recommendations

IIS2DHTR as Primary Substitute:

The IIS2DHTR is a direct functional substitute for the BMA250 based on parameter equivalence. Selection of the IIS2DHTR is supported by the following engineering factors:

• Product Status: The IIS2DHTR maintains active manufacturing status, ensuring long-term supply chain availability and continued technical support from STMicroelectronics.

• Regulatory Compliance: Both devices carry REACH Unaffected status and EAR99 ECCN classification. The IIS2DHTR additionally maintains RoHS3 compliance, meeting current environmental and regulatory requirements.

• Parameter Equivalence: All critical electrical parameters—acceleration range, communication protocols, supply voltage, operating temperature, and package configuration—are identical or compatible between the two devices.

• Performance Enhancement: The IIS2DHTR provides extended bandwidth capability (1Hz ~ 5.3kHz versus 8Hz ~ 1kHz) and improved sensitivity resolution at higher acceleration ranges, offering performance advantages without compromising backward compatibility.

• Supply Availability: The IIS2DHTR demonstrates significantly higher inventory availability (1,000,300 units versus 105,200 units for BMA250), supporting immediate procurement and production continuity.

Frequently Asked Questions (FAQ)

Q: Can the IIS2DHTR directly replace the BMA250 in existing designs?

A: Yes. The IIS2DHTR is pin-compatible and functionally equivalent to the BMA250. Both devices use identical 12-LGA (2x2) packaging, support I2C and SPI communication, and operate across the same supply voltage and temperature ranges. Register-level compatibility requires verification against application firmware, as communication protocol implementation may differ between manufacturers.

Q: What are the key differences between the BMA250 and IIS2DHTR?

A: The primary differences are: (1) Bandwidth range—IIS2DHTR extends to 5.3kHz versus BMA250's 1kHz maximum; (2) Sensitivity at ±16g—IIS2DHTR provides 21 LSB/g versus BMA250's 16 LSB/g; (3) Additional features—IIS2DHTR includes sleep mode and integrated temperature sensor; (4) Product status—IIS2DHTR is actively manufactured while BMA250 is obsolete.

Q: Are there supply voltage compatibility concerns?

A: The IIS2DHTR minimum supply voltage is 1.71V compared to the BMA250's 1.62V. This 0.09V difference is negligible for most applications. Both devices operate to 3.6V maximum. Applications operating at the lower voltage extreme (1.62V ~ 1.71V) require verification that the IIS2DHTR meets minimum operating requirements.

Q: Does the IIS2DHTR require different PCB layout or mounting considerations?

A: No. Both devices use identical 12-LGA (2x2) surface mount packages. PCB footprints, solder reflow profiles, and mounting procedures are equivalent. No design modifications to PCB layout are required for substitution.

Q: What is the impact of the extended bandwidth in the IIS2DHTR?

A: The IIS2DHTR's extended bandwidth (1Hz ~ 5.3kHz) provides greater flexibility for applications requiring higher frequency response. Applications designed for the BMA250's 8Hz ~ 1kHz bandwidth operate within the IIS2DHTR's specification range without modification. The lower 1Hz minimum bandwidth in the IIS2DHTR supports additional low-frequency sensing applications.

Q: Are there firmware or driver changes required for substitution?

A: Register-level implementation and command structures may differ between Bosch Sensortec and STMicroelectronics devices. Firmware modifications may be necessary to accommodate manufacturer-specific register definitions, initialization sequences, and data formatting. Consult device datasheets and application notes from both manufacturers for detailed protocol specifications.

Q: What certifications and compliance standards apply to the IIS2DHTR?

A: The IIS2DHTR carries REACH Unaffected status, EAR99 ECCN classification, and RoHS3 compliance. These certifications meet current environmental and export control requirements for industrial and consumer applications.