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this is information on a product in full production. march 2014 docid026103 rev 1 1/15 MP34DB02 mems audio sensor omnidire ctional digital microphone datasheet - production data features ? single supply voltage ? low power consumption ? 120 dbspl acoustic overload point ? 62.6 db signal-to-noise ratio ? omnidirectional sensitivity ? ?26 dbfs sensitivity ? pdm single-bit output with option for stereo configuration ? rhlga package ? bottom-port design ? smd-compliant ? emi-shielded ?ecopack ? , rohs and ?green? compliant applications ? mobile terminals ? laptop and notebook computers ? portable media players ? voip ? speech recognition ? a/v elearning devices ? gaming and virtual reality input devices ? digital still and video cameras ? antitheft systems description the MP34DB02 is an ultra-compact, low-power, omnidirectional, digital mems microphone built with a capacitive sensing element and an ic interface with st ereo operation capability. the sensing element, capable of detecting acoustic waves, is manufactured using a specialized silicon micromachining process dedicated to produce audio sensors. 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 MP34DB02 has an acoustic overload point of 120 dbspl with a best on the market 62.6 db signal-to-noise ratio and -26 dbfs sensitivity. the MP34DB02 is available in a bottom-port, smd-compliant, emi-shie lded package and is guaranteed to operate over an extended temperature range from -40 c to +85 c. rhlga (3 x 4 x 1 mm) 4ld table 1. device summary part number temperature range [c] package packing MP34DB02 -40 to +85 rhlga (3x4x1) mm 4ld tray MP34DB02tr -40 to +85 rhlga (3x4x1) mm 4ld tape and reel www.st.com
contents MP34DB02 2/15 docid026103 rev 1 contents 1 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 acoustic and electrical specificat ions . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 acoustic and electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 timing characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.3 frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 sensing element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 5 functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5.1 l/r channel selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 application recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 8 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
docid026103 rev 1 3/15 MP34DB02 pin description 15 1 pin description figure 1. pin connections table 2. pin description pin n pin name function 1 clk synchronization input clock 2 lr left/right channel selection 3 vdd power supply 4 dout left/right pdm data output 5 (ground ring) gnd 0 v supply am07238v2
acoustic and electrical specifications MP34DB02 4/15 docid026103 rev 1 2 acoustic and electrical specifications 2.1 acoustic and elect rical 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 min. typ. (1) max. unit vdd supply voltage 1.64 1.8 3.6 v idd current consumption in normal mode mean value (2) 0.65 ma iddpdn current consumption in power-down mode (3) 20 a scc short-circuit current 1 10 ma aop acoustic overload point 120 dbspl so sensitivity at 1 khz, 1 pa -29 -26 -23 dbfs snr signal-to-noise ratio a-weighted at 1 khz, 1 pa 62.6 db psr power supply rejection -70 dbfs clock input clock frequency (4) 1 2.4 3.25 mhz twk wake-up time (5) guaranteed by design 10 ms top operating temperature range -40 +85 c 1. typical specifications are not guaranteed. 2. no load on dout line. 3. input clock in static mode. 4. duty cycle: min = 40% max = 60% 5. time from the first clock edge to valid output data. table 4. distortion specifications parameter test condition value distortion 100 dbspl (50 hz - 4 khz) < 1 % thd + n distortion 115 dbspl (1 khz) < 5 % thd + n
docid026103 rev 1 5/15 MP34DB02 acoustic and electrical specifications 15 2.2 timing characteristics figure 2. timing waveforms table 5. timing characteristics parameter descrip tion min max unit f clk clock frequency for normal mode 1 3.25 mhz f pd clock frequency for power-down mode 0.23 mhz t clk clock period for normal mode 308 1000 ns t r,en data enabled on data line, l/r pin = 1 18 (1) 1. from design simulations 30 (1) ns t r,dis data disabled on data line, l/r pin = 1 16 (1) ns t l,en data enabled on data line, l/r pin = 0 18 (1) 30 (1) ns t l,dis data disabled on data line, l/r pin = 0 16 (1) ns high z high z high z high z t l,en r,dis r,en t l,dis t t t clk am045165v1 clk pdm r pdm l
acoustic and electrical specifications MP34DB02 6/15 docid026103 rev 1 2.3 frequency response figure 3. frequency response
docid026103 rev 1 7/15 MP34DB02 sensing element 15 3 sensing element the sensing element shall mean the acoustic sensor consisting of a conductive movable plate and a fixed plate placed in a tiny silic on chip. this sensor transduces the sound pressure into the changes of coupled capacity between those two plates. omron corporation supplies this element for stmicroelectronics.
absolute maximum ratings MP34DB02 8/15 docid026103 rev 1 4 absolute maximum ratings stresses above those listed as ?absolute ma ximum 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. ex posure to maximum rating conditions for extended periods may affect device reliability. table 6. absolute maximum ratings symbol ratings maximum value unit vdd supply voltage -0.3 to 6 v vin input voltage on any control pin -0.3 to vdd +0.3 v t stg storage temperature range -40 to +125 c esd electrostatic discharge protection 2 (hbm) kv this device is sensitive to mechanical shock, improper handling can cause permanent damage to the part. this device is esd-sensitive, improper han dling can cause permanent damage to the part.
docid026103 rev 1 9/15 MP34DB02 functionality 15 5 functionality 5.1 l/r channel selection the l/r digital pad lets the user select the dout signal pattern as explained in table 7 . the l/r pin must be connected to vdd or gnd. table 7. l/r channel selection l/r clk low clk high gnd data valid high impedance vdd high impedance data valid
application recommendations MP34DB02 10/15 docid026103 rev 1 6 application recommendations figure 4. MP34DB02 electrical connections figure 5. MP34DB02 electrical conne ctions for stereo configuration power supply decoupling capacitors (100 nf ceramic, 10 f ceramic) should be placed as near as possible to pin 3 of the device (common design practice). the l/r pin must be connected to vdd or gnd (refer to table 7 ). codec vdd 10 f 100 nf l/r dout 1 2 3 4 5 top view clk am07964v1 codec dout clk 1 2 3 4 5 top view 1 2 3 4 5 top view mic1 mic2 100 nf 10 f vdd am07965v1
docid026103 rev 1 11/15 MP34DB02 package mechanical data 15 7 package mechanical data in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and prod uct status are available at: www.st.com. ecopack is an st trademark. soldering information the rhlga (3 x 4 x 1) mm package is also compliant with the rohs and ?green? standards and is qualified for soldering heat resistance according to jedec j-std-020. landing pattern and soldering recommendations are available at www.st.com . figure 6. recommended soldering profile limits table 8. recommended soldering profile limits description parameter pb free average ramp rate t l to t p 3 c/sec max preheat minimum temperature maximum temperature time (t smin to t smax ) t smin t smax t s 150 c 200 c 60 sec to 120 sec ramp-up rate t smax to t l time maintained above liquidus temperature liquidus temperature t l t l 60 sec to 150 sec 217 c peak temperature t p 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 t25c to peak ramp-down ramp-up t s preheat t l t p critical zone t l to t p t smax t smin time t p t l temperature 30 60 90 120 150 180 210 240 270 300 330 360 390 am045166v1
package mechanical data MP34DB02 12/15 docid026103 rev 1 figure 7. rhlga 3x4 (metal cap) 0.25mm port hole 4ld package outline table 9. rhlga 3 x 4 (metal cap) 0.25 mm port hole 4ld package dimensions symbol mm. min. typ. max. a1 0.900 1.000 1.100 a2 0.200 0.250 0.300 d1 3.900 4.000 4.100 d2 0.900 1.000 1.100 d3 1.000 1.100 1.200 d4 3.610 3.700 3.790 r1 0.200 0.250 0.300 r2 0.280 r3 0.250 e1 2.900 3.000 3.100 e2 1.300 1.500 1.700 e4 2.610 2.700 2.790 l1 0.650 0.700 0.750 l2 0.850 0.900 0.950 n1 1.000 1.050 1.100 n2 0.400 0.450 0.500 t1 0.350 0.400 0.450 t2 0.550 0.600 0.650
docid026103 rev 1 13/15 MP34DB02 package mechanical data 15 g1 3.050 3.100 3.150 g2 3.750 3.800 3.850 g3 2.050 2.100 2.150 g4 2.750 2.800 2.850 g5 0.250 0.300 0.350 g6 0.050 0.100 0.150 g7 0.500 0.550 0.600 g8 0.800 0.850 0.900 m 0.100 k 0.050 table 9. rhlga 3 x 4 (metal cap) 0.25 mm port hole 4ld package dimensions (continued) symbol mm. min. typ. max.
revision history MP34DB02 14/15 docid026103 rev 1 8 revision history table 10. document revision history date revision changes 21-mar-2014 1 initial release.
docid026103 rev 1 15/15 MP34DB02 15 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a parti cular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. st products are not designed or authorized for use in: (a) safety critical applications such as life supporting, active implanted devices or systems wi th product functional safety requirements; (b) aeronautic applications; (c) automotive applications or environments, and/or (d) aerospace applications or environments. where st products are not designed for such use, the purchaser shall use products at purchaser?s sole risk, even if st has been informed in writing of such usage, unless a product is expressly designated by st as being intended for ?automotive, automotive safety or medical? industry domains according to st product design specifications. products formally escc, qml or jan qualified are deemed suitable for use in aerospace by the corresponding governmental agency. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2014 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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