INMP441 MEMS Omnidirectional Microphone Module High Precision/SNR Low Power I2C Interface Supports ESP32

The INMP441 MEMS Omnidirectional Microphone Module delivers exceptional performance with its low power consumption and digital output capabilities. This omnidirectional MEMS microphone features a bottom port design and integrates various components, including a MEMS sensor, signal conditioning, an analog-to-digital converter, an anti-aliasing filter, and power management, all connected through a standard 24-bit I2S interface. This I2S interface enables direct integration with digital processors like DSPs and microcontrollers, eliminating the need for an audio codec in your setup. The INMP441 boasts a high signal-to-noise ratio, making it ideal for near-field applications, and its broad frequency response ensures the reproduction of natural sound at high definition.

Features:

• Digital I2S interface providing precise 24-bit data output

• Impressive signal-to-noise ratio of 61 dBA

• High sensitivity level at 26 dBFS

• Consistent frequency response ranging from 60 Hz to 15 kHz

• Energy-efficient with a low current consumption of just 1.4 mA

• Superior power supply rejection (PSR) at -75 dBFS

Interface Definition

• SCK: Serial clock for I2S communication

• WS: Serial data word selection for I2S communication

• L/R: Selection for left/right channel output.

• When set to low, the microphone transmits a signal on the left channel of the I2S frame.

• When set to high, the microphone sends signals to the right channel.

• SD: Serial data output for the I2S interface.

• VCC: Power input range of 1.8V to 3.3V.

• GND: Ground connection.

NMP441 Connection with ESP32

• SCK - GPIO14

• SD - GPIO32

• WS - GPIO15

• L/R - GND

• GND - GND

• VDD - VDD3.3

Package Includes:

• 1 X INMP441 MEMS Microphone Sensor Module

Return Policy Overview

At ROBODIUM™, we want you to be completely satisfied with your purchase. You may return most items within 7 days of delivery for a full refund or exchange.

Return Window

• Standard Returns: 7 days from delivery date for any reason, including if you simply changed your mind.
• Defective/Damaged Items: 7 days from delivery date for items received damaged or defective.
• Manufacturing Defects (Warranty): 15 days from delivery for manufacturing defects, unless a different warranty period is specified on the product page.

What Can Be Returned

Most items sold on ROBODIUM™ can be returned within the return window, including:

• Items you no longer need or changed your mind about
• Products received in damaged condition
• Items with manufacturing defects
• Wrong items received (item mismatch)
• Missing components inside the package

Return Conditions

To be eligible for a return, items must be:

• In their original, unused condition
• In the original packaging with all accessories, manuals, and free gifts (if any)
• Accompanied by proof of purchase

Note: Products damaged due to misuse, modification, static discharge, soldering, or improper handling may not be eligible for return.

How to Initiate a Return

1. Contact us via email at support@robodium.com or call +91 8123109966
2. Provide your order number and reason for return
3. Submit photos/videos of the item (especially for damaged/defective products)
4. Our team will review and approve your return request within 1-2 business days

Return Pickup Process

We arrange the return pickup for you - hassle-free returns similar to major e-commerce platforms.

• Once your return is approved, we will coordinate pickup from your location.
• Pack the product securely in its original packaging.
• Include a copy of the order confirmation or packing list.
• Keep the package ready - our logistics partner will collect it at the scheduled time.

Return Shipping Costs

• Defective, damaged, or wrong items: ROBODIUM™ covers all return shipping costs. No charges to you.
• Change of mind returns: A flat return shipping fee of ₹100 will be deducted from your refund amount.

Refund Process

• Refund Method: Refunds are processed to your original payment method.
• Processing Time: 5-7 business days after we receive and inspect the returned item.
• Refund Amount: Full purchase price minus any applicable return shipping fees.
• Orders canceled before shipping receive a full refund (minus up to 5% payment gateway charges, if applicable).

Replacements

• Once the returned item is inspected and approved, we ship the replacement at no additional cost.
• Replacement items are dispatched within 2 business days of receiving your return.
• If replacement is unavailable, we provide a full refund.

Warranty Terms

All products include a minimum 15-day warranty against manufacturing defects unless otherwise specified on the product page.

Warranty does not cover: misuse, soldering damage, modifications, physical damage, or incorrect electrical connections.

Order Cancellations

• Orders in Pending or Payment Verification status can be canceled for a full refund.
• Contact us immediately at support@robodium.com to cancel before shipping.
• Once an order is shipped, it cannot be canceled but can be returned after delivery.

Customer Service Commitment

• Email Response Time: Within 24 hours on business days
• Phone Support: Monday-Saturday, 10:00 AM - 6:00 PM IST
• Return Request Review: 1-2 business days
• Issue Resolution: Within 48 hours of verification