INMP521
Note: The INMP521 is marked as EOL and is not recommended for new designs.
The INMP521 is a high performance, ultra-low noise, low power, digital output bottom-ported omnidirectional MEMS microphone. The INMP521 consists of a MEMS microphone element and an impedance converter amplifier, followed by a fourth-order Σ-Δ modulator. The digital interface allows for the pulse density modulated (PDM) output of two microphones to be time multiplexed on a single data line using a single clock. The INMP521 is function and pin compatible with the INMP421 microphone, providing an easy upgrade path.
The INMP521 has a very high SNR and common sensitivity of −26 dBFS, making it an excellent choice for far field applications. The INMP521 has an extended wideband frequency response resulting in natural sound with high intelligibility. Low current consumption and a sleep mode with less than 1 µA current consumption enables long battery life for portable applications.
The INMP521 complies with the TIA-920 Telecommunications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones standard. The INMP521 is available in a thin 3 × 4 × 1 mm surface-mount package. It is reflow solder compatible with no sensitivity degradation. The INMP521 is halide free.
Features
- Small and Thin 3 × 4 × 1 mm Surface-Mount Package
- Omnidirectional Response
- Very High SNR of 65 dBA
- Sensitivity of −26 dBFS
- Extended Frequency Response from 100 Hz to 16 kHz
- Low Current Consumption: 900 µA
- Sleep Mode for Extended Battery Life, <1 µA consumption
- 120 dB Maximum SPL
- High PSR of -80 dBFS
- Fourth-Order Σ-Δ Modulator
- Digital PDM Output
- Compatible with Sn/Pb and Pb-Free Solder Processes
- RoHS/WEEE Compliant
Product key details
| Operation |
- |
| Package Size |
1.00 × 4.00 × 3.00 |
| Output Type |
PDM |
| Port Location |
Bottom |
| SNR |
65.00 |
| AOP |
120.00 |
| Sensitivity (1 kHz, 94 dB SPL) |
- |
| Sensitivity dB FS ±1 dB |
-26.00 |
| LF Cutoff |
100 |
| Status |
Announced |
Documentation and resources
Explore our complete library of technical resources, easily filtered by application or product.
App Notes & User Guides
Support and Resources
Find answers, documentation, and community support you need
TDK community
Connect with engineers, ask questions, and share insights with the TDK developer community.
Knowledge base
Access technical articles, datasheets, and in-depth guides to accelerate your design process.
FAQ
Find immediate answers to our most frequently asked questions about products, shipping, and more.