CS7250B Datasheet, PDF (1/11 Pages) Cirrus Logic – Digital MEMS Microphone with High Performance and Low Power Modes

CS7250B
Digital MEMS Microphone with
High Performance and Low Power Modes
Features
• High acoustic overload point (AOP, 131 dB SPL)
• High signal-to-noise ratio (SNR, 66 dB)
• Low variation in sensitivity (±1 dB)
• Low current consumption
— 650 A (High Performance Mode)
— 160 A (Low Power Mode)
— 5 A (Standby Mode)
• PDM digital audio output
• Bottom-port LGA package
• 1.8-V supply
Description
The CS7250B is a high-performance digital MEMS
microphone, offering class-leading total harmonic distortion
(THD) performance, excellent SNR, and low power
consumption.
The CS7250B supports two operational modes, selected
according to the applied clock frequency. Low Power Mode
is ideal for always-on voice activity detection; High
Performance Mode is optimized for high fidelity recording.
The CS7250B incorporates a high-performance ADC,
which outputs a single-bit data stream using pulse density
modulation (PDM) encoding. The CS7250B supports
selectable left/right channel assignment for a two-channel
digital microphone interface, enabling efficient connection
of multiple microphones in stereo/array configurations.
The CS7250B is available in a 3.50 x 2.65 x 0.98-mm
bottom-port LGA package, with port diameter of 0.325 mm.
It is ideal for portable applications such as smartphones,
tablets, wearables and portable speech-recognition
devices.
VDD
GND
MEMS
Transducer
CMOS ASIC
Biasing
High
Performance
Amp
Ultralow
Power ADC
Digital
Signal
Processing
PDM
CLK
DATA
LRSEL
Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
http://www.cirrus.com
Copyright  Cirrus Logic, Inc. 2015–2017
(All Rights Reserved)
DS1072PP1
MAY '17