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© 2011‐2016 MEMSensing Microsystems (Suzhou,China)Co. Ltd, —Ver. 1.0. DOC NO:DS‐035. All rights reserved 2 MSM38A2718Z9A‐E Analog output MEMS microphone GENERAL DESCRIPTION MSM38A2718Z9A‐E is an omnidirectional, Bottom‐ported, analog output MEMS microphone. It has high performance and reliability. It is with enhanced RF immunity performance . MSM38A2718Z9A‐E is available in a thin 2.75 mm × 1.85 mm × 0.9 mm metal cap LGA package. It is SMT compatible with no sensitivity degradation. FEATURES Omnidirectional Excellent RF immunity Standard SMD Reflow Compatible with Sn/Pb and Pb‐free solder processes RoHS/Halogen free compliant APPLICATIONS Mobile Phone Laptop Tablet computer Bluetooth headset Earphone Wearable intelligent equipment PRODUCT VIEW © 2011‐2016 MEMSensing Microsystems (Suzhou,China)Co. Ltd, —Ver. 1.0. DOC NO:DS‐035. All rights reserved 3 MSM38A2718Z9A‐E Analog output MEMS microphone ABSOLUTE MAXIMUM RATINGS Parameter Maximum value Unit Supply Voltage −0.3 to 4.0 V Sound Pressure Level 140 dB SPL Temperature Range −40 to 100 °C Electrostatic discharge protection 2 (HBM) kV 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. ACOUSTIC & ELECTRICAL SPECIFICATIONS All data taken at 25°C, Relative Humidity 45±5% unless otherwise specified Limitsunitcondition Min. Nom.Max. Directivity Omni directional Sensitivity ‐41 ‐38‐35 dB @1kHz ref 1V/Pa Operation voltage 1.5 ‐3.6V Freq. range Refer to the frequency responsegraphic Hz Ref to sensitivity@1kHz Sensitivity loss across supply voltage No change across the voltage range dB Signal to noise ratio ‐ 63 ‐ dB 20 kHz bandwidth, A‐weighted THD ‐ 0.15 ‐ % 94dB SPL @1kHzS =Nom, Rload 2 k AOP ‐ 123 ‐ dB SPL10% THD @1kHzS =Nom, Rload 2 k Polarity Increasing output voltage Increasing soundpressure Output impedance ‐ 200‐Ω@1kHz DC Output 0.7V PSRR ‐ 70 ‐ dB 200mVpp sine wave @ 1 kHz, VDD = 1.8V PSR ‐ ‐100 ‐ dBV(A)100 mVpp squarewave@ 217 Hz, VDD = 1.8V, A‐weighted Current consumption‐ 150170μA Storage temperature‐40 ‐100°C © 2011‐2016 MEMSensing Microsystems (Suzhou,China)Co. Ltd, —Ver. 1.0. DOC NO:DS‐035. All rights reserved 4 MSM38A2718Z9A‐E Analog output MEMS microphone TYPICAL FREQUENCY RESPONSE ‐20‐1001020Sensitivity (dB V/Pa)Frequence (Hz)Frequency Response @94dB SPL1002005001K2K5K10K SMT Parameters： 1.Recommend PCB land pattern & stencil pattern layout：（unit: mm） © 2011‐2016 MEMSensing Microsystems (Suzhou,China)Co. Ltd, —Ver. 1.0. DOC NO:DS‐035. All rights reserved 5 MSM38A2718Z9A‐E Analog output MEMS microphone 2.Recommend reflow profile: Description Parameter Pb‐free Average ramp‐up rate T smaxto TP 3°C/sec max Preheat Minimum temperature Maximum temperature Time(TSMIN to TSMAX) TSMIN TSMAX tS 150 °C 200 °C 60 sec to 180 sec Ramp‐up rate TSMAX to TL 1.25 °C/sec Time maintained above liquidus temperature Liquidus temperature tL TL 60 sec to 150 sec 217 °C Peak temperature TP 260 °C Time within 5°C of actual peak temperature tP 20 sec to 40 sec Ramp‐down rate TP to T smax 6 °C/sec max Time 25 °C (t25 °C) to peak temperature t 8 minutes max © 2011‐2016 MEMSensing Microsystems (Suzhou,China)Co. Ltd, —Ver. 1.0. DOC NO:DS‐035. All rights reserved 6 MSM38A2718Z9A‐E Analog output MEMS microphone OUTLINE DIMENSIONS AND PIN DEFINITION： Item DimensionTolerance Length (L) 2.75 ±0.10 Width (W) 1.85 ±0.10 Height (H) 0.90 ±0.10 Acoustic Port (AP) Ø0.25 ±0.05 PIN function description PIN# Function 1 VDD 2 OUT 3 GND Dimensions are in millimeters Tolerance is ±0.15mm unless otherwise specified. SIDE VIEW TOP VIEW BOTTOM VIEW © 2011‐2016 MEMSensing Microsystems (Suzhou,China)Co. Ltd, —Ver. 1.0. DOC NO:DS‐035. All rights reserved 7 MSM38A2718Z9A‐E Analog output MEMS microphone RECOMMENDED INTERFACE CIRCUIT： Recommended Application Example (differential amplification circuit) NOTE：It is recommended that the components on the left side of red line be placed close to MIC，and components on the right side of red line be placed close to codec. (1) (3) (2) © 2011‐2016 MEMSensing Microsystems (Suzhou,China)Co. Ltd, —Ver. 1.0. DOC NO:DS‐035. All rights reserved 8 MSM38A2718Z9A‐E Analog output MEMS microphone ADDITIONAL NOTES (A) MSL (moisture sensitivity level) Class 2a. (B) Maximum of 3 reflow cycles is recommended. (C) In order to minimize device damage: Do not board wash or clean after the reflow process. Do not brush board with or without solvents after the reflow process. Do not directly expose to ultrasonic processing, welding, or cleaning. Do not insert any object in port hole of device at any time. Do not apply