INMP522ACEZ-R7 Equivalent & Substitute Parts

Part Overview

The INMP522ACEZ-R7 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 @ 94dB SPL and supports supply voltages from 1.62 V to 3.63 V. The part is currently in Last Time Buy status, indicating discontinued production. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring compatible MEMS microphone functionality.

Substiute Parts

INMP522ACEZ-R7

TDK InvenSenseIn Stock: 1763INMP522ACEZ-R7 Datasheet

Current PartRFQ

INMP621ACEZ-R7

TDK InvenSenseIn Stock: 66516INMP621ACEZ-R7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the INMP522ACEZ-R7 is determined by the following critical parameters that must remain compatible:

• Type & Output: MEMS (Silicon) with Digital PDM output
• Directional Pattern: Omnidirectional
• Voltage Compatibility: Supply voltage range 1.62 V ~ 3.63 V
• Physical Footprint: 4.00mm x 3.00mm package with solder pad termination
• Frequency Response: Audio frequency range capability (75 Hz minimum or lower)
• Compliance: ROHS3 compliance and MSL rating

The INMP621ACEZ-R7 qualifies as a manufacturer-recommended substitute based on matching these core electrical and mechanical parameters. Both parts share identical physical dimensions, voltage ranges, termination methods, and compliance certifications. Differences in sensitivity and frequency range represent design variations within the same product family that do not preclude substitution in applications where the INMP621 specifications are acceptable.

Parameter Comparison

Engineering Selection Recommendations

The INMP621ACEZ-R7 is the manufacturer-recommended substitute for the INMP522ACEZ-R7. Both components maintain identical physical dimensions, electrical interfaces, and compliance certifications (ROHS3, MSL 1). The INMP621 series is in Active product status, ensuring continued availability and supply chain stability compared to the Last Time Buy status of the INMP522.

Key considerations for selection:

• Frequency Response: The INMP621 extends lower frequency capability to 45 Hz versus 75 Hz for the INMP522, providing broader audio spectrum coverage.
• Sensitivity: The INMP621 operates at -46dB sensitivity compared to -26dB for the INMP522. Applications must verify that the lower sensitivity level is acceptable for their signal chain and gain requirements.
• Supply Current: The INMP621 draws 1.6 mA versus 1.4 mA for the INMP522, a 0.2 mA increase that should be evaluated in power-constrained applications.
• Packaging: The INMP621 is available in Cut Tape (CT) & Digi-Reel® packaging, whereas the INMP522 uses Tape & Reel (TR) packaging. Procurement and handling procedures may require adjustment.

Both parts share identical voltage ranges, omnidirectional patterns, PDM digital output, and solder pad termination, confirming mechanical and electrical compatibility at the board level.

Frequently Asked Questions (FAQ)

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

A: The INMP621ACEZ-R7 is the manufacturer-recommended substitute. Both parts share identical physical dimensions (4.00mm x 3.00mm), voltage ranges (1.62 V ~ 3.63 V), termination methods (solder pads), and compliance certifications. However, the INMP621 has lower sensitivity (-46dB vs -26dB) and extended lower frequency response (45 Hz vs 75 Hz). Verify that these parameter differences are acceptable for your application before substitution.

Q: What are the key electrical compatibility factors?

A: Both the INMP522 and INMP621 operate on identical supply voltage ranges (1.62 V ~ 3.63 V), use Digital PDM output, and maintain 65dB S/N ratio. The primary electrical difference is supply current (1.4 mA vs 1.6 mA) and sensitivity levels. Both are suitable for 3.3V and lower voltage logic interfaces.

Q: Are there packaging differences between these parts?

A: Yes. The INMP522ACEZ-R7 is supplied in Tape & Reel (TR) packaging, while the INMP621ACEZ-R7 uses Cut Tape (CT) & Digi-Reel® packaging. Verify that your procurement and assembly processes support the INMP621 packaging format.

Q: Why does the INMP621 have lower sensitivity than the INMP522?

A: Sensitivity is a design characteristic of the MEMS microphone element. The INMP621 is engineered for different acoustic applications. Lower sensitivity (-46dB) requires higher gain in the signal chain but may provide better performance in high-SPL environments. Evaluate your application's acoustic requirements and signal chain gain budget.

Q: Are both parts RoHS compliant?

A: Yes. Both the INMP522ACEZ-R7 and INMP621ACEZ-R7 are ROHS3 compliant with MSL rating of 1 (Unlimited moisture sensitivity level), confirming suitability for standard manufacturing and storage conditions.

Q: What is the significance of the INMP522 being in Last Time Buy status?

A: Last Time Buy status indicates that the INMP522 is discontinued and no longer in active production. Existing inventory is limited. The INMP621, which is in Active status, ensures long-term availability and supply chain continuity for new designs or production ramps.