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this is information on a product in full production. july 2012 doc id 17924 rev 8 1/16 1 mp34db01 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 ?g reen? 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 mp34db01 is an ultra-compact, low-power, omnidirectional, digital mems microphone built with a capacitive sensing element and an ic interface with stereo 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 mp34db01 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 mp34db01 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 3x4x1 4ld table 1. device summary part number temperature range [c] package packing mp34db01 -40 to +85 rhlga (3x4x1) mm 4ld tray MP34DB01TR -40 to +85 rhlga (3x4x1) mm 4ld tape and reel www.st.com
contents mp34db01 2/16 doc id 17924 rev 8 contents 1 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 acoustic and electrical specificati ons . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1 acoustic and electrical characte ristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 timing characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3 sensing element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 5 functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5.1 l/r channel selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 6 application recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 8 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
mp34db01 list of tables doc id 17924 rev 8 3/16 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 8. l/r channel selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 table 9. recommended soldering profile limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 table 10. rhlga 3 mm x 4 mm x 1 mm 4-lead package dimensions . . . . . . . . . . . . . . . . . . . . . . . . 14 table 11. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
list of figures mp34db01 4/16 doc id 17924 rev 8 list of figures figure 1. pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 2. timing waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 figure 3. typical frequency response normalized at 1 khz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 figure 4. mp34db01 electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 figure 5. mp34db01 electrical connections for stereo configuration . . . . . . . . . . . . . . . . . . . . . . . . 12 figure 6. recommended soldering profile limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 figure 7. rhlga 3 mm x 4 mm x 1 mm 4-lead package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
mp34db01 pin description doc id 17924 rev 8 5/16 1 pin description figure 1. pin connections table 2. pin description pin # 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 am072 38 v1
acoustic and electrical specifications mp34db01 6/16 doc id 17924 rev 8 2 acoustic and electrical specifications 2.1 acoustic and electrical characteristics the values listed in the table below are sp ecified 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 guaranteed by design -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 v iol low level logic input/output voltage i out = 1 ma -0.3 0.35xvdd v v ioh high level logic input/output voltage i out = 1 ma 0.65xvdd vdd+0.3 v 1. typical specificat ions 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 cloc k 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
mp34db01 acoustic and electrical specifications doc id 17924 rev 8 7/16 2.2 timing characteristics figure 2. timing waveforms table 5. timing characteristics parameter description 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 30 (1) 1. from design simulations 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 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,di s r,en t l,di s t t t clk am045165v1 clk pdm r pdm l
acoustic and electrical specifications mp34db01 8/16 doc id 17924 rev 8 2.3 frequency response figure 3. typical frequency response normalized at 1 khz table 6. frequency response mask for digital microphones frequency / hz (1) 1. at t = 20 c and acoustic stimulus = 1 pa (94 db spl). lower limit upper limit unit 20...100 -5 +5 dbr 1khz 100...8000 -2 +2 dbr 1khz 8000...20000 -5 +5 dbr 1khz -10 -8 -6 -4 -2 0 2 4 6 8 10 10 100 1000 10000 normalized sensitivity [db] frequency [hz] am045 3 17v1
mp34db01 sensing element doc id 17924 rev 8 9/16 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 mp34db01 10/16 doc id 17924 rev 8 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. exposure to maximum rating conditions for extended periods may affect device reliability. table 7. 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 handling can cause permanent damage to the part.
mp34db01 functionality doc id 17924 rev 8 11/16 5 functionality 5.1 l/r channel selection the l/r digital pad lets the user select the dout signal pattern as explained in ta bl e 8 . the l/r pin must be connected to vdd or gnd. table 8. l/r channel selection l/r clk low clk high gnd data valid high impedance vdd high impedance data valid
application recommendations mp34db01 12/16 doc id 17924 rev 8 6 application recommendations figure 4. mp34db01 electrical connections figure 5. mp34db01 electrical connections 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 ta bl e 8 ). 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
mp34db01 package mechanical data doc id 17924 rev 8 13/16 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 product 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 re sistance according to jedec j-std-020. landing pattern and soldering recommendations are available at www.st.com . figure 6. recommended soldering profile limits table 9. 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 liquidous temperature liquidous 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 s max t s min time t p t l temperature 3 0 60 90 120 150 1 8 0 210 240 270 3 00 33 0 3 60 3 90 am045166v1
package mechanical data mp34db01 14/16 doc id 17924 rev 8 figure 7. rhlga 3 mm x 4 mm x 1 mm 4-lead package outline top view bottom view 1 2 3 4 a1 c kc k seating plane n2 l2 t2 g 2 g 1 l 1 n 1 t 1 t 1 t2 g 7 g 8 g4 g3 2 x g 6 g5xg5 pin 1 indicator bottom port indicator k kd k e d 2 r 1 e d e1 d 1 e2 m 8 17 8 74 3 _e // table 10. rhlga 3 mm x 4 mm x 1 mm 4-lead package dimensions symbol mm min typ max a1 0.900 1.000 1.100 d1 3.900 4.000 4.100 d2 0.950 1.000 1.050 r1 0.350 0.400 0.450 e1 2.900 3.000 3.100 e2 1.450 1.500 1.550 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 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 m0.100 k0.050
mp34db01 revision history doc id 17924 rev 8 15/16 8 revision history table 11. document revision history date revision changes 28-mar-2011 1 initial release 05-apr-2011 2 updated ta bl e 3 and ta b l e 5 21-oct-2011 3 added max. peak temperature t p to ta b l e 9 18-nov-2011 4 updated snr typical value in ta bl e 3 ; document promoted from preliminary to full datasheet 04-jan-2012 5 updated features and description updated figure 3: typical frequency response normalized at 1 khz 20-mar-2012 6 added test condition criterion to psr in table 3: acoustic and electrical characteristics 07-may-2012 7 added v iol , v ioh to table 3: acoustic and electrical characteristics 05-jul-2012 8 added section 3: sensing element updated operating temperature range throughout datasheet
mp34db01 16/16 doc id 17924 rev 8 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. unless expressly approved in writing by two authorized st representatives, st products are not recommended, authorized or warranted for use in milita ry, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. 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. ? 2012 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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