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ADMP621ACEZ-RL7 Fiches technique(PDF) 1 Page - Analog Devices |
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ADMP621ACEZ-RL7 Fiches technique(HTML) 1 Page - Analog Devices |
1 / 16 page Wide Dynamic Range Microphone with PDM Digital Output Data Sheet ADMP621 FEATURES 133 dB SPL acoustic overload point Small and thin 4 mm × 3 mm × 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 consumption High power supply rejection (PSR): −100 dBFS Fourth-order Σ-Δ modulator Digital pulse density modulation (PDM) output Compatible with Sn/Pb and Pb-free solder processes RoHS/WEEE compliant APPLICATIONS Smartphones and feature phones Tablet computers Teleconferencing systems Digital still and video cameras Bluetooth headsets Notebook PCs Security and surveillance FUNCTIONAL BLOCK DIAGRAM ADMP621 ADC POWER MANAGEMENT CLK DATA PDM MODULATOR CHANNEL SELECT Figure 1. BOTTOM TOP Figure 2. Isometric Views of ADMP621 Microphone Package GENERAL DESCRIPTION The ADMP6211 is a high sound pressure level (SPL), ultralow 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 ADMP621 consists of a MEMS microphone element and an impedance converter amplifier followed by a fourth-order Σ-Δ modulator. The digital interface allows the pulse density modulated (PDM) output of two microphones to be time multiplexed on a single data line using a single clock. The ADMP621 is pin compatible with the ADMP421 and ADMP521 microphones, providing an easy upgrade path. The ADMP621 has a high SNR of 65 dBA and sensitivity of −46 dBFS. The ADMP621 has an extended wideband frequency response, resulting in natural sound with high intelligibility. Low current consumption and a sleep mode with less than 5.5 µA of current consumption enables long battery life for portable applications. The ADMP621 is available in a thin 4 mm × 3 mm × 1 mm surface-mount package. It is reflow solder compatible with no sensitivity degradation. 1 Protected by U.S. Patents 7,449,356; 7,825,484; 7,885,423; and 7,961,897. Other patents are pending. Rev. 0 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com |
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