ADMP421 Datasheet | Analog Devices

FEATURES GENERAL DESCRIPTION Small and thin 3 mm × 4 mm × 1 mm surface-mount package The ADMP421 is a high performance, low power, digital output High SNR of 61 d BA bottom-ported omnidirectional MEMS microphone. The High sensitivity of - 26 d BFS ADMP421 consists of a MEMS microphone element and an Flat frequency response from 100 Hz to 15 k Hz impedance converter amplifier followed by a fourth-order Σ-Δ Low current consumption: <650 µA modulator. The digital interface allows for the pulse density Sleep mode for extended battery life High PSR of 80 d BFS Fourth-order Σ-Δ modulator Digital PDM output patible with Sn/Pb and Pb-free solder processes E Ro HS/WEEE pliant APPLICATIONS T Smartphones and feature phones Teleconferencing systems Digital video cameras Bluetooth headsets E Video phones Tablets modulated (PDM) output of two microphones to be timemultiplexed on a single data line using a single clock. The ADMP421 has a high SNR and high sensitivity, making it an excellent choice for far field applications. The ADMP421 has a flat wideband frequency response, resulting in natural sound with high intelligibility. Low current consumption and a sleep mode enable long battery life for portable applications. A builtin particle filter provides high reliability. The ADMP421 plies with the TIA-920 Telemunications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones standard. The ADMP421 is available in a thin 3 mm × 4 mm × 1 mm surface-mount package. It is reflow solder patible with no sensitivity degradation. The ADMP421 is halide free. L FUNCTIONAL BLOCK DIAGRAM OADC PDM MODULATOR POWER MANAGEMENT CHANNEL SELECT CLK DATA VDD GND L/R SELECT 07596-001 OBS Figure1. Rev. D Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result...