SPH1668LM4H-1 TM Digital Zero-Height SiSonic Microphone With Multiple Performance Modes The SPH1668LM4H-1 is a miniature, high- Features: performance, low power, bottom port Low Distortion of 1.6% at 120dBSPL silicon digital microphone with a single bit High SNR of 65.5dB PDM output. Using Knowles proven high Low Current Consumption of 230uA in TM performance SiSonic MEMS technology, Low-Power Mode the SPH1668LM4H-1 consists of an acoustic Flat Frequency Response sensor, a low noise input buffer, and a high RF Shielded TM performance sigma-delta modulator. These Zero-Height Mic devices are suitable for applications such as Supports Dual Multiplexed Channels cellphones, smart phones, laptop Standard SMD Reflow computers, sensors, digital still cameras, Omnidirectional portable music recorders, and other Multiple performance modes (Sleep, portable electronic devices where excellent Low-Power, Performance) wideband audio performance and RF Sensitivity Matching immunity are required. In addition, the Small Size SPH1668LM4H-1 offers multiple performance modes Revision: A 03/04/2015 Sheet 1 of 14 2014 Knowles Electronics 1. ABSOLUTE MAXIMUM RATINGS Parameter Absolute Maximum Rating Units V , DATA to Ground -0.3, +5.0 V DD CLOCK to Ground -0.3, +5.0 V SELECT to Ground -0.3, +5.0 V Input Current 5 mA Short Circuit Current to/from DATA Indefinite to Ground or V sec DD Temperature Range -40 to +100 C Stresses exceeding these Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only. Functional operation at these or any other conditions beyond those indicated under Acoustic & Electrical Specifications is not implied. Exposure beyond those indicated under Acoustic & Electrical Specifications for extended periods may affect device reliability. 2. ACOUSTIC & ELECTRICAL SPECIFICATIONS TEST CONDITIONS: 23 2C, 5520% R.H., V =1.8 V, f =2.4 MHz, SELECT pin grounded, no load, unless DD CLOCK otherwise indicated General Microphone Specifications Parameter Symbol Conditions Min Typ Max Units Supply Voltage V 1.62 - 3.6 V DD Sleep Mode 0 250 KHz Clock Low-Power Mode 351 815 KHz Frequency Performance 1.024 2.475 Range MHz Mode 3.072 4.8 1,3 Sleep Current I f 250 kHz - 100 A SLEEP CLOCK DC Output Fullscale = 100 - 0 - % FS Directivity Omnidirectional Increasing sound Polarity Increasing density of 1s pressure Data Format Cycle PDM Short Circuit Current I Grounded DATA pin 1 - 20 mA SC Output Load C - - 140 pF LOAD 4,5 Fall-asleep Time f 250 KHz - - 50 ms CLOCK 4,6 Wake-up Time f = 2.4 MHz - - 100 ms CLOCK 4 Power-up Time V V(min) - - 100 ms DD 4 Mode-Change Time - - 10 ms Revision: A 03/04/2015 Sheet 2 of 14 2014 Knowles Electronics