SPM1423HM4H-B TM Digital High-SNR SiSonic Microphone The SPM1423HM4H-B is a miniature, high- Features: performance, low power, top port silicon Low Noise digital microphone with a single bit PDM High Sensitivity output. Using Knowles proven high Low Current TM performance SiSonic MEMS technology, RF Shielded the SPM1423HM4H-B consists of an acoustic PDM Output sensor, a low noise input buffer, and a Supports Dual Multiplexed Channels sigma-delta modulator. These devices are Ultra-Stable Performance suitable for applications such as cellphones, Standard SMD Reflow smart phones, laptop computers, sensors, Omnidirectional digital still cameras, portable music recorders, and other portable electronic devices where excellent audio performance and RF immunity are required. The increased sensitivity and high Signal-to-Noise-Ratio (SNR) of the SPM1423HM4H-B also enhances the performance of far-field applications and many complex, multi- microphone algorithms. Revision: D 6/18/2013 Sheet 1 of 13 2013 Knowles Electronics SPM1423HM4H-B 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, DD CLOCK unless otherwise indicated Parameter Symbol Conditions Min Typ Max Units 1 Supply Voltage V 1.6 - 3.6 V DD 1,2,3 Supply Current I - 500 600 A DD 3 Sleep Current I F < 1 kHz - 25 50 A SLEEP CLOCK 1 Sensitivity S 94 dB SPL 1 kHz -25 -22 -19 dBFS Signal to Noise Ratio SNR 94 dB SPL 1 kHz, A-weighted 60 61.5 - dB(A) Total Harmonic THD 94 dB SPL 1 kHz, S = Typ - 0.25 0.35 % Distortion Acoustic Overload dB AOP 10% THD 1 kHz, S = Typ 112 115 - Point SPL Power Supply dBV PSRR 200 mVpp sinewave 1 kHz - 48 - Rejection Ratio /FS Power Supply 100 mVpp square wave dBFS PSR - -80 - Rejection 217 Hz, A-weighted (A) DC Output Fullscale = 100 - 4 - % FS Directivity Omnidirectional Polarity Increasing sound pressure Decreasing density of 1s Data Format Cycle PDM Logic Input High V 0.65xV - 3.6 V IH DD Revision: D 6/18/2013 Sheet 2 of 13 2013 Knowles Electronics