INMP522ACEZ-R0 Equivalent & Substitute Parts

Part Overview

The INMP522ACEZ-R0 is a MEMS digital PDM omnidirectional microphone manufactured by TDK InvenSense. This component operates across a frequency range of 75 Hz to 20 kHz with a sensitivity of -26dB ±1dB at 94dB SPL, designed for applications requiring compact, low-power audio capture with digital output. The part is currently in Last Time Buy status, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for ongoing and future production requirements.

Substiute Parts

INMP522ACEZ-R0

TDK InvenSenseIn Stock: 861INMP522ACEZ-R0 Datasheet

Current PartRFQ

INMP621ACEZ-R7

TDK InvenSenseIn Stock: 66516INMP621ACEZ-R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the INMP522ACEZ-R0 is determined by the following critical parameters:

• Type & Technology: MEMS (Silicon) construction with digital PDM output
• Directional Pattern: Omnidirectional response
• Electrical Interface: 1.62 V to 3.63 V supply voltage compatibility
• Physical Form Factor: 4.00mm x 3.00mm footprint with solder pad termination
• Frequency Response: Coverage of the 75 Hz to 20 kHz audio band
• Compliance: ROHS3 compliance and MSL 1 rating

The INMP621ACEZ-R7 qualifies as a manufacturer-recommended substitute. While it exhibits different sensitivity (-46dB versus -26dB) and an extended lower frequency response (45 Hz versus 75 Hz), it maintains compatibility across all critical substitution parameters: identical MEMS technology, PDM digital output, omnidirectional pattern, matching voltage range, equivalent footprint dimensions, solder pad termination, and identical compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The INMP621ACEZ-R7 is the manufacturer-recommended substitute for the INMP522ACEZ-R0. Both components maintain ROHS3 compliance and MSL 1 ratings, ensuring equivalent environmental and regulatory standing. The INMP621ACEZ-R7 is currently in Active product status, providing assured long-term availability compared to the Last Time Buy status of the INMP522ACEZ-R0.

Selection between these parts should account for the documented differences in sensitivity and frequency response. The INMP621ACEZ-R7 provides lower sensitivity (-46dB versus -26dB) and extended low-frequency response (45 Hz versus 75 Hz lower limit). Supply current increases marginally from 1.4 mA to 1.6 mA, and maximum height increases by 0.10mm. These differences are within the scope of component-level substitution for applications where the extended frequency response and lower sensitivity profile are compatible with system requirements.

Frequently Asked Questions (FAQ)

Q: Can the INMP621ACEZ-R7 be used as a direct replacement for the INMP522ACEZ-R0?

A: The INMP621ACEZ-R7 is the manufacturer-recommended substitute and shares identical footprint, voltage range, digital PDM output, and compliance certifications. However, the sensitivity difference (-46dB versus -26dB) and extended low-frequency response (45 Hz versus 75 Hz) must be evaluated against specific application requirements. PCB layout compatibility is confirmed due to matching solder pad termination and dimensions.

Q: What are the key differences between these two microphones?

A: The primary differences are sensitivity (20dB lower on the INMP621ACEZ-R7), frequency response lower limit (45 Hz versus 75 Hz), supply current (1.6 mA versus 1.4 mA), and maximum height (1.10mm versus 1.00mm). Both maintain identical voltage range, omnidirectional pattern, S/N ratio, and compliance status.

Q: Are there packaging differences between these parts?

A: The INMP522ACEZ-R0 is supplied in Tape & Reel (TR) packaging, while the INMP621ACEZ-R7 is available in Cut Tape (CT) & Digi-Reel® packaging. Both use solder pad termination and are compatible with standard surface-mount assembly processes.

Q: What is the impact of the sensitivity difference on system design?

A: The 20dB sensitivity difference means the INMP621ACEZ-R7 requires higher input sound pressure levels to achieve equivalent output levels. Applications must ensure that the lower sensitivity of the INMP621ACEZ-R7 aligns with the acoustic environment and signal chain gain structure of the target system.

Q: Are both parts compliant with current environmental regulations?

A: Both the INMP522ACEZ-R0 and INMP621ACEZ-R7 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.