MP34DT04 MEMS audio sensor omnidirectional digital microphone Datasheet - production data Gaming and virtual reality input devices Digital still and video cameras Antitheft systems Description The MP34DT04 is an ultra-compact, low-power, omnidirectional, digital MEMS microphone built with a capacitive sensing element and an IC interface. The sensing element, capable of detecting acoustic waves, is manufactured using a specialized silicon micromachining process dedicated to produce audio sensors. Features Single supply voltage Low power consumption 120 dBSPL acoustic overload point 64 dB signal-to-noise ratio Omnidirectional sensitivity -26 dBFS sensitivity PDM output HCLGA package Top-port design SMD-compliant EMI-shielded (R) ECOPACK , RoHS, and "Green" compliant The IC interface is manufactured using a CMOS process that allows designing a dedicated circuit able to provide a digital signal externally in PDM format. The MP34DT04 has an acoustic overload point of 120 dBSPL with a 64 dB signal-to-noise ratio and -26 dBFS sensitivity. The MP34DT04 is available in a top-port, SMDcompliant, EMI-shielded package and is guaranteed to operate over an extended temperature range from -40 C to +85 C. Table 1: Device summary Order codes Temp. range [C] Package Packing MP34DT04 -40 to +85 HCLGA (3x4 x1.095 mm) 4LD Tray MP34DT04TR -40 to +85 HCLGA (3x4x1.095 mm) 4LD Tape and reel Applications Mobile terminals Laptop and notebook computers Portable media players VoIP Speech recognition A/V eLearning devices May 2015 DocID027586 Rev 2 This is information on a product in full production. 1/21 www.st.com Contents MP34DT04 Contents 1 Pin description ................................................................................ 5 2 Acoustic and electrical specifications ........................................... 6 2.1 Acoustic and electrical characteristics ............................................... 6 2.2 Timing characteristics ....................................................................... 7 2.3 Frequency response ......................................................................... 8 3 Application recommendations ....................................................... 9 4 5 Carrier tape mechanical specifications ....................................... 11 Process recommendations ........................................................... 12 6 Sensing element ............................................................................ 14 7 Absolute maximum ratings........................................................... 15 8 Functionality .................................................................................. 16 8.1 9 10 2/21 L/R channel selection ...................................................................... 16 Package information ..................................................................... 17 9.1 Soldering information ...................................................................... 17 9.2 HCLGA package information........................................................... 18 Revision history ............................................................................ 20 DocID027586 Rev 2 MP34DT04 List of tables List of tables Table 1: Device summary ........................................................................................................................... 1 Table 2: Pin description .............................................................................................................................. 5 Table 3: Acoustic and electrical characteristics .......................................................................................... 6 Table 4: Distortion specifications ................................................................................................................ 6 Table 5: Timing characteristics ................................................................................................................... 7 Table 6: Frequency response mask for digital microphones ...................................................................... 8 Table 7: Absolute maximum ratings ......................................................................................................... 15 Table 8: L/R channel selection ................................................................................................................. 16 Table 9: Recommended soldering profile limits ........................................................................................ 17 Table 10: Document revision history ........................................................................................................ 20 DocID027586 Rev 2 3/21 List of figures MP34DT04 List of figures Figure 1: Pin connections ........................................................................................................................... 5 Figure 2: Timing waveforms ....................................................................................................................... 7 Figure 3: Frequency response and mask ................................................................................................... 8 Figure 4: MP34DT04 electrical connections (top view) .............................................................................. 9 Figure 5: MP34DT04 electrical connections for stereo configuration (top view) ...................................... 10 Figure 6: Carrier tape without microphone (top view) ............................................................................... 11 Figure 7: Carrier tape with microphone (top view) .................................................................................... 11 Figure 8: Recommended picking area ...................................................................................................... 12 Figure 9: Recommended picker design .................................................................................................... 13 Figure 10: Recommended soldering profile limits .................................................................................... 17 Figure 11: HCLGA (3x4x1.095) 4-lead package outline and mechanical data ........................................ 18 Figure 12: Land pattern............................................................................................................................. 19 4/21 DocID027586 Rev 2 MP34DT04 1 Pin description Pin description Figure 1: Pin connections Table 2: Pin description Pin # Pin name Function 1 Vdd Power supply 2 LR Left/Right channel selection 3 CLK Synchronization input clock 4 DOUT Left/Right PDM data output 5 (ground ring) GND 0 V supply DocID027586 Rev 2 5/21 Acoustic and electrical specifications MP34DT04 2 Acoustic and electrical specifications 2.1 Acoustic and electrical characteristics The values listed in the table below are specified for Vdd = 1.8 V, Clock = 2.4 MHz, T = 25 C, unless otherwise noted. Table 3: Acoustic and electrical characteristics Symbol Parameter Test condition Vdd Supply voltage Idd Current consumption in normal mode IddPdn Current consumption in power(2) down mode Scc Short-circuit current AOP Acoustic overload point So Typ. 1.6 Mean value Max. Unit 1.8 3.6 V 600 700 A 10 A 10 mA 120 Sensitivity -29 Signal-to-noise ratio PSR Power supply rejection Input clock frequency (1) 1 SNR Clock Min. -23 64 dB (A) 100 mVpp sine 1 kHz -70 dBFS 1 2.4 3.25 MHz 10 ms -40 +85 C Ton Turn-on time Top Operating temperature range VIOL Low-level logic input/output voltage Iout = 1 mA -0.3 0.35xVdd V VIOH High-level logic input/output voltage Iout = 1 mA 0.65xVdd Vdd+0.3 V Guaranteed by design Notes: (1) (2) Typical specifications are not guaranteed. Input clock in static mode. (3) Duty cycle: min = 40% max = 60%. (4) dBFS A-weighted at 1 kHz, 94 dB SPL (3) (4) -26 dBSPL Time from the first clock edge to valid output data. Table 4: Distortion specifications 6/21 Parameter Test condition Value Distortion 100 dBSPL (50 Hz - 4 kHz) < 1% THD + N Distortion 115 dBSPL (1 kHz) < 5% THD + N DocID027586 Rev 2 MP34DT04 2.3 Acoustic and electrical specifications Timing characteristics Table 5: Timing characteristics Parameter Description fCLK Clock frequency for normal mode fPD Clock frequency for power-down mode TCLK TR,EN TR,DIS TL,EN TL,DIS Min. Max. Unit 1 3.25 MHz 0.23 MHz 1000 ns Clock period for normal mode Data enabled on DATA line, L/R pin = 1 308 18 (1) Data disabled on DATA line, L/R pin = 1 Data enabled on DATA line, L/R pin = 0 18 Data disabled on DATA line, L/R pin = 0 ns 16 (1) 16 (1) (1) ns ns ns Notes: (1) From design simulations Figure 2: Timing waveforms DocID027586 Rev 2 7/21 Acoustic and electrical specifications 2.4 MP34DT04 Frequency response Figure 3: Frequency response and mask Table 6: Frequency response mask for digital microphones Frequency / Hz (1) Lower limit Upper limit Unit 100...4000 -2 +2 dBr 1 kHz 4000...10000 -2 +4 dBr 1 kHz Notes: (1) 8/21 At T = 20 C and acoustic stimulus = 1 Pa (94 dB SPL) DocID027586 Rev 2 MP34DT04 3 Application recommendations Application recommendations Figure 4: MP34DT04 electrical connections (top view) DocID027586 Rev 2 9/21 Application recommendations MP34DT04 Figure 5: MP34DT04 electrical connections for stereo configuration (top view) Power supply decoupling capacitors (100 nF ceramic, 10 F ceramic) should be placed as near as possible to pin 1 of the device (common design practice). The L/R pin must be connected to Vdd or GND (refer to Table 8: "L/R channel selection"). 10/21 DocID027586 Rev 2 MP34DT04 4 Carrier tape mechanical specifications Carrier tape mechanical specifications Figure 6: Carrier tape without microphone (top view) Figure 7: Carrier tape with microphone (top view) DocID027586 Rev 2 11/21 Process recommendations 5 MP34DT04 Process recommendations To ensure a consistent manufacturing process it is strongly advised to comply with the following recommendations: The recommended pick-up area for the MP34DT04 package must be defined using the worst case (ie. no device alignment during the picking process). This area has been defined considering all the tolerances of the components involved (reel, package, sound inlet). The picker tolerance shall be considered as well. To prevent damage to the MEMS membrane or incorrect pick-up and placement, do not pick up the component on the inlet area For the package outline please refer to . Nozzle shape, size, and placement accuracy are the other key factors to consider when deciding on the coordinates for picking. Device alignment before picking is highly recommended. A vacuum force greater than 7 psi must be avoided 1 kPa = 0.145 psi (lb/in2) = 0.0102 kgf/cm = 0.0098 atm All recommended dimensions (device safe-picking area) do not include the pick-andplace equipment tolerances Figure 8: Recommended picking area To have a safe pick-up "by design", ST strongly advises an ad hoc nozzle. The following picker ensures that the holes for the vacuum and the air stream are ALWAYS away from the porthole of the device (4 vacuum ports located at each corner of the device). The recommended nozzle also has a recess, in the form of a cross, which guarantees that the porthole is always left at atmospheric pressure. By using the recommended nozzle, the membrane will not suffer any sudden air disturbances during the picking or placing of the devices in the tape and reel. 12/21 DocID027586 Rev 2 MP34DT04 Process recommendations Figure 9: Recommended picker design DocID027586 Rev 2 13/21 Sensing element 6 MP34DT04 Sensing element The sensing element shall mean the acoustic sensor consisting of a conductive movable plate and a fixed plate placed in a tiny silicon chip. This sensor transduces the sound pressure into the changes of coupled capacity between those two plates. Omron Corporation supplies this element for STMicroelectronics. 14/21 DocID027586 Rev 2 MP34DT04 7 Absolute maximum ratings Absolute maximum ratings Stresses above those listed as "absolute maximum ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device under these conditions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. Table 7: Absolute maximum ratings Symbol Ratings Vdd Supply voltage Vin Input voltage on any control pin TSTG Storage temperature range Maximum value Unit -0.3 to 5 V -0.3 to Vdd +0.3 V -40 to +125 C 2000 (HBM) ESD Electrostatic discharge protection 200 (MM) V 750 (CBM) ESD Product standard EN 55024:2010 - 3 air discharge DocID027586 Rev 2 15000 V 15/21 Functionality MP34DT04 8 Functionality 8.1 L/R channel selection The L/R digital pad lets the user select the DOUT signal pattern as shown in Table 8: "L/R channel selection". The L/R pin must be connected to Vdd or GND. Table 8: L/R channel selection 16/21 L/R CLK low CLK high GND Data valid High impedance Vdd High impedance Data valid DocID027586 Rev 2 MP34DT04 9 Package information Package information In order to meet environmental requirements, ST offers these devices in different grades of (R) (R) ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. (R) ECOPACK is an ST trademark. 9.1 Soldering information The HCLGA (3 x 4) 4LD package is also compliant with the RoHS and "Green" standards and is qualified for soldering heat resistance according to JEDEC J-STD-020. Land pattern and soldering recommendations are available at www.st.com. Figure 10: Recommended soldering profile limits Table 9: Recommended soldering profile limits Description Average ramp rate Preheat Minimum temperature Maximum temperature Time (TSMIN to TSMAX) Ramp-up rate Parameter Pb free TL to TP 3 C/sec max TSMIN TSMAX tS 150 C 200 C 60 sec to 120 sec TSMAX to TL Time maintained above liquids temperature Liquids temperature tL TL 60 sec to 150 sec 217 C Peak temperature TP 260 C max Time within 5 C of actual peak temperature 20 sec to 40 sec Ramp-down rate 6 C/sec max Time 25 C (t25 C) to peak temperature 8 minutes max DocID027586 Rev 2 17/21 Package information 9.2 MP34DT04 HCLGA package information Figure 11: HCLGA (3x4x1.095) 4-lead package outline and mechanical data Dimensions are in millimeter unless otherwise specified General Tolerance is +/-0.15mm unless otherwise specified OUTER DIMENSIONS ITEM Length [L] Width [W] Height [H] AP DIMENSION [mm] 3 4 1.095 0.4 TOLERANCE [mm] 0.1 0.1 0.1 0.1 8579626_B 1. 2. 18/21 The MEMS microphone plastic cap can exhibit some level of variation in color when the device is subjected to thermal processes. Ring plating can be subject to change not affecting acoustic and electrical performance. DocID027586 Rev 2 MP34DT04 Package information Figure 12: Land pattern DocID027586 Rev 2 19/21 Revision history 10 MP34DT04 Revision history Table 10: Document revision history Date Revision 10-Mar-2015 1 Initial release 07-May-2015 2 Updated Section 9.2: "HCLGA package information" 20/21 Changes DocID027586 Rev 2 MP34DT04 IMPORTANT NOTICE - PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST's terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers' products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. (c) 2015 STMicroelectronics - All rights reserved DocID027586 Rev 2 21/21 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: STMicroelectronics: MP34DT04TR