INMP621 Overview
The INMP621 is a high sound pressure level (SPL), ultra-low noise, low power, digital output, bottom ported omnidirectional MEMS microphone. This microphone clips at 133 dB SPL, which is useful for clearly capturing audio in loud environments. The INMP621 consists of a MEMS microphone element and an impedance converter amplifier followed by a fourth-order Σ-Δ modulator.
INMP621 Key Features
- High Acoustic Overload Point of 133 dB SPL
- Small, Thin 4 × 3 × 1 mm Surface-Mount Package
- Omnidirectional Response
- Very High Signal-to-Noise Ratio (SNR): 65 dBA
- Sensitivity of -46 dBFS
- Extended Frequency Response from 45 Hz to >20 kHz
- Low Current Consumption: 1.2 mA
- Sleep Mode for Extended Battery Life: 5.5 µA
- High Power Supply Rejection (PSR): -100 dBFS
- Fourth-Order Σ-Δ Modulator