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Evaluation Board, ADMP621 Wide Dynamic Range Microphone, PDM Digital Output


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IVSEVINMP621FX   Datasheet
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Product Overview

The EVAL-ADMP621Z-FLEX is a flex evaluation board for ADMP621 wide dynamic range microphone with PDM digital output. The ADMP621 is a high sound pressure level (SPL), ultra low noise, low power, digital output, bottom ported omnidirectional MEMS microphone. This microphone clips at 133dB SPL, which is useful for clearly capturing audio in loud environments. The ADMP621 consists of a MEMS microphone element and an impedance converter amplifier followed by a fourth order sigma delta modulator. The small size and low profile of the flexible printed circuit board (PCB) enable direct placement of the microphone into a prototype or an existing design for an in situ evaluation. The evaluation board consists of a bottom port microphone and a 0.1µF bypass capacitor soldered to a flexible PCB with colour-coded wires attached. Stereo PDM microphones can be evaluated by connecting the DATA wires from two flex boards, while tying the L/R SELECT wire of one to VDD and the other to GND.
  • High acoustic overload point of 133dB SPL
  • Omnidirectional response
  • Very high signal to noise ratio (SNR) of 65dBA
  • Sensitivity of -46dBFS
  • Extended frequency response from 45Hz to greater than 20KHz
  • Low current consumption of 1.2mA
  • Sleep mode for extended battery life of 5.5µA
  • High power supply rejection (PSR) of -100dBFS
  • Fourth order sigma delta modulator
  • Digital pulse density modulation (PDM) output


Communications & Networking, Consumer Electronics, Portable Devices, Wireless, Security


ESD sensitive device, take proper precaution while handling the device. Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

Product Information

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Analog Devices


Audio, Video

MEMS Microphone

Evaluation Board ADMP621


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Technical Documents (1)

CAD Downloads


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CAD Models - Notice
CAD Models and drawings are provided to you on a revocable limited licence for your internal use only but remain the property of the manufacturer who retain all intellectual property rights and ownership. They are provided to assist you in decision making and as design guide but are not guaranteed to be error free, accurate or up to date and is not intended to be taken as advice.
Use of these CAD models and other options provided are downloaded and used entirely at your own risk and by continuing you confirm acceptance of the above.

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Available to manufacturer lead time 27 weeks

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Due to market conditions delivery times are for general guidance only and may be subject to change at short notice


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