SPH0645LM4H-B Datasheet - Knowles

SPH0645LM4H-B - I2S Output Digital Microphone

A block diagram of the I2S microphone is shown in Figure 7.

The microphone consists of the following blocks, the MEMS transducer, the Charge Pump(red), the Amplifier(yellow), the Sigma Delta Convertor(green), the Decimator(orange), the Low Pass Filter(turquoise),and the Tri-state Control (gray).

SPH0645LM4H-B SPH0645LM4H-B Rev B Datasheet I2S Output Digital Microphone The SPH0645LM4H-B is a miniature, low power, bottom port microphone with an I2S digital output.

The solution consists of a proven high performance SiSonic™ acoustic sensor, a serial Analog to Digital convertor, and an interface to condition the signal into an industry standard 24 bits I2S format.

The I2S interface simplifies the integration in the system and allow direct interconnect to digital processors, application

SPH0645LM4H-B Features

* High SNR of 65dB(A)

* Low Current of typ. 600µA

* I2S Output: Direct attach to µP

* Multi modes: standard >1MHz,

* 600uA / sleep

SPH0645LM4H-B-Knowles.pdf