ADMP421
ObsoleteiMEMS® Microphone Omni Directional Microphone with Bottom Port and Digital Output
Part Details
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Analog Devices has sold its MEMS Microphone product line to InvenSense.
Please visit the InvenSense ADMP421 product page for all technical support and sales information.
The ADMP421 is a low cost, low power, digital output bottom ported omni-directional MEMS microphone. The ADM421 consists of a MEMS microphone element, an output amplifier and a 4th order sigma delta modulator. The digital interface allows for the PDM (Pulse Density Modulated) output of two microphones to be time multiplexed on a single data line using a single clock.
The ADMP421 has a high SNR and a high sensitivity making it an excellent choice for far field applications. The ADMP421 has a flat wideband frequency response resulting in natural soundwith high intelligibility. Low current consumption and a sleep mode enable long battery life for portable applications. The ADMP421 complies with the TIA-920 Telecommunications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones standard.
The ADMP421 will be available in a very thin 3 mm × 4 mm × 1 mm surface mount package. It is reflow solder compatible with no sensitivity degradation. It is halide-free.
Applications
- Smartphones and features phones
- Digital video cameras
- Bluetooth Headsets
- Video Phones
- Teleconferencing systems
Documentation
Application Note 1
Frequently Asked Question 1
Obsolete Data Sheet 1
This is the most up-to-date revision of the Data Sheet.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Audio CODECs 3 | ||
| ADAU1361 | PRODUCTION | Stereo, Low Power, 96 kHz, 24-Bit Audio Codec with Integrated PLL |
| ADAU1373 | Obsolete | Low Power Codec with Speaker and Headphone Amplifier |
| ADAU1381 | Obsolete | Low-noise Stereo Codec with Enhanced Recording and Playback Processing |
| SigmaDSP Audio Processors 2 | ||
| ADAU1761 | PRODUCTION | SigmaDSP Stereo, Low Power, 96 kHz, 24-Bit Audio Codec with Integrated PLL |
| ADAU1781 | Obsolete | SigmaDSP Low-noise Stereo Audio Codec for Portable Applications |
Tools & Simulations
IBIS Model 1
Evaluation Kits
MEMS Microphone Evaluation Boards
ADMP421Z Evaluation Board
ADMP421 FLEX Evaluation Board