ADMP521
ObsoleteUltra-Low Noise Microphone with Bottom Port and PDM Digital Output
Part Details
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Analog Devices has sold its MEMS Microphone product line to InvenSense.
Please visit the InvenSense ADMP521 product page for all technical support and sales information.
The ADMP521 is a high performance, ultra low noise, low power, digital output bottom-ported omnidirectional MEMS microphone. The ADMP521 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 ADMP521 is function- and pin-compatible with the ADMP421 microphone, providing an easy upgrade path.
The ADMP521 has a very high SNR and common sensitivity of −26 dBFS, making it an excellent choice for far field applications. The ADMP521 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 ADMP521 complies with the TIA-920 Telecommunications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones standard.
The ADMP521 is available in a thin 3 mm × 4 mm × 1 mm surface-mount package. It is reflow solder compatible with no sensitivity degradation. The ADMP521 is halide free.
APPLICATIONS
- Smartphones and feature phones
- Tablet computers
- Teleconferencing systems
- Digital still & video cameras
- Bluetooth headsets
- Notebook PCs
- Security and surveillance
Documentation
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Audio CODECs 3 | ||
| ADAU1381 | Obsolete | Low-noise Stereo Codec with Enhanced Recording and Playback Processing |
| ADAU1373 | Obsolete | Low Power Codec with Speaker and Headphone Amplifier |
| ADAU1361 | PRODUCTION | Stereo, Low Power, 96 kHz, 24-Bit Audio Codec with Integrated PLL |
| SigmaDSP Audio Processors 2 | ||
| ADAU1781 | Obsolete | SigmaDSP Low-noise Stereo Audio Codec for Portable Applications |
| ADAU1761 | PRODUCTION | SigmaDSP Stereo, Low Power, 96 kHz, 24-Bit Audio Codec with Integrated PLL |
Tools & Simulations
IBIS Model 1
Evaluation Kits
ADMP521 FLEX Evaluation Board
Resources
MEMS Microphone Evaluation Boards
ADMP521Z Evaluation Board