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revision: c 2 / 2 8 /201 3 sheet 1 of 13 ?201 3 knowles electronics spm0423hd 4h - w b digital sisonic tm microphone the spm0423hd 4h - wb is a miniature, high - performance, low power, top port silicon digital microphone with a single bit pdm output. using knowles proven high performance sisonic tm mems technology, the spm0423hd 4h - wb consists of an acoustic sensor, a low noise input buffer, and a sigma - delta modulator. these devices are suitable for applications such as cellphones, smart phones, laptop computers, sensors, digital still cameras, portable music recorders, and other porta ble electronic devices where excellent wideband audio performance and rf immunity are required. features: ? pdm output ? supports dual multiplexed channels ? ultra - stable performance ? standard smd reflow ? omnidirectional
revision: c 2 / 2 8 /201 3 sheet 2 of 13 ?201 3 knowles electronics spm0423hd4h - wb 1. absolute maximum ratings parameter absolute maximum rating units v dd , data to ground - 0.3, +5.0 v 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 dd sec 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 operat ion at these or any other conditions beyond those indicated under acoustic & electrical specifications is not implied . exposure beyond those indicated under acous tic & electrical specifications for extended periods may affect device reliability. 2. acoustic & electrical specifications test conditions: 23 2c, 5520 % r.h., v dd =1.8 v, f clock =2.4 mhz, select pin grounded, no load, unless otherwise indicated parameter symbol conditions min typ max units supply voltage 1 v dd 1.6 - 3.6 v supply current 1 , 2 , 3 i dd - 500 600 a sleep current 3 i sleep f clock < 1 khz - 25 5 0 a sensitivity 1 s 94 db spl @ 1 khz - 29 - 26 - 23 dbfs signal to noise ratio snr 94 db spl @ 1 khz, a - weighted - 56 - db(a) total harmonic distortion thd 94 db spl @ 1 khz, s = typ - - 1 % acoustic overload point aop 10% thd @ 1 khz, s = typ 11 5 - - db spl dc output fullscale = 1 00 - 4 - % fs directivity omnidirectional polarity increasing sound pressure decreasing density of 1s ih 0.65xv dd - 3.6 v logic input low v il - 0.3 - 0.35xv dd v logic output high v oh i out = 1 ma 0.65xv dd - v dd v logic output low v ol i out = 1 ma 0 - 0.35xv dd v
revision: c 2 / 2 8 /201 3 sheet 3 of 13 ?201 3 knowles electronics spm0423hd4h - wb parameter symbol conditions min typ max units select (high) v dd - 0.2 - 3.6 v select (low) - 0.3 - 0.2 v short circuit current i sc grounded data pin - 1 10 ma output load c load - - 100 pf clock frequency f clock 1.0 - 3.25 mhz clock duty cycle 40 - 60 % clock rise/fall time t edge - - 10 ns fall - asleep time 4 , 5 f clock < 1 khz - - 10 ms wake - up time 4 , 6 f clock 1 mhz - - 10 ms delay time for valid data t dv no load for min t dv 18 - 60 ns max c load for max t dv delay time for high z t dz 0 - 16 ns 1 100% tested. 2 i dd varies with c load according to: i dd = 0.5*v dd * c load *f clock . 3 maximum specifications are measured at maximum v dd . typical specifications are measured at standard test conditions. 4 valid microphones states are: powered down mode (mic o ff), sleep mode (low current, data = high - z , fast startup), and active mode (normal operation). 5 time from f clock < 1 khz to i sleep specification is met when transitioning from active mode to sleep mode. 6 time from f clock 1 mhz to all applicable specifications are met when transiti oning from sleep mode to active mode.
revision: c 2 / 2 8 /201 3 sheet 4 of 13 ?201 3 knowles electronics spm0423hd4h - wb 3. microphone state diagram powered down mode active mode sleep mode
revision: c 2 / 2 8 /201 3 sheet 5 of 13 ?201 3 knowles electronics spm0423hd4h - wb 4. frequency response curve -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 20 100 1,000 10,000 sensitivity (db) frequency (hz) typical free field response normalized to 1 khz
revision: c 2 / 2 8 /201 3 sheet 6 of 13 ?201 3 knowles electronics spm0423hd4h - wb 5. interface circuit microphone select asserts data on latch data on mic (high) v dd rising clock edge falling clock edge mic (low) gnd falling clock edge rising clock edge note: all ground pins must be connected to ground. capacitors near the microphone should not contain class 2 dielectrics. de tailed information on acoustic , mechanical , and system integration can be found in the latest sisonic tm design guide application note. 6. timing diagram t dv t dz c lock d ata (select = v dd ) d ata (select = gnd) v ih v il t dv t dz t edge high z mic (low) data high z mic (high) data v oh v ol t edge v oh v ol 1/f clock v dd v dd select mic (high) data clock .1 ? f .1 ? f mic (low) select
revision: c 2 / 2 8 /201 3 sheet 7 of 13 ?201 3 knowles electronics spm0423hd4h - wb 7. mechanical specifications item dimension tolerance units length (l) 4.72 0.10 mm width (w) 3.76 0.10 mm height (h) 1.25 0.10 mm acoustic port (ap) ?0.84 0.08 mm p in # p in n ame t ype d escription 1 ground power ground 2 select non - digital input lo/hi (l/r) select this pin is internally pulled low. 3 ground power ground 4 clock digital i clock input 5 data digital o pdm output 6 v dd power power supply notes: pick area only extends to 0.25 mm of any edge or hole unless otherwise specified. dimensions are in millimeters unless otherwise specified. tolerance is 0.15mm unless otherwise specified
revision: c 2 / 2 8 /201 3 sheet 8 of 13 ?201 3 knowles electronics spm0423hd4h - wb 8. example land pattern 9. example solder stencil pattern notes: dimensions are in millimeters unless otherwise specified. further optimizations based on application should be performed.
revision: c 2 / 2 8 /201 3 sheet 9 of 13 ?201 3 knowles electronics spm0423hd4h - wb 10. packa g ing & marketing detail model n umber suffix reel d iameter quantity per r eel spm0 423hd 4h - w b - 6 13 4,800 alpha character a : s : knowles sisonic tm production e : knowles engineering samples p: knowles prototype samples jin number: unique job identification number for product traceability notes: dimensions are in millimeters unless otherwise specified . vacuum pickup only in the pick area indicated in mechanical specifications. tape & reel per eia - 481. label s applied directly to reel and external package. shelf life: twelve (12) months when devices are to be stored in factory supplied, unopened esd moisture sensitive bag under maximum environmental conditions of 30c, 70% r.h. pin 1
revision: c 2 / 2 8 /201 3 sheet 10 of 13 ?201 3 knowles electronics spm0423hd4h - wb 11. recommended reflow profile profile feature pb - free average ramp - up rate (t smax to t p ) 3c/second max. preheat ? temperature min (t s min ) ? temperature max (t smax ) ? time (t s min to t smax ) (t s ) 150c 200c 60 - 180 seconds time maintained above: ? temperature (t l ) ? time (t l ) 217c 60 - 150 seconds peak temperature (t p ) 260c time within 5c of actual peak temperature (t p ) 20 - 40 seconds ramp - down rate (t p to t smax ) 6c/second max time 25c to peak temperature 8 minutes max notes: based on ipc/jdec j - std - 020 revision c. all temperatures refer to topside of the package, measured on the package body surface. temperature time 25c to peak ramp - down ramp - up t smin t sm ax t l t p t l t p t s preheat time 25c
revision: c 2 / 2 8 /201 3 sheet 11 of 13 ?201 3 knowles electronics spm0423hd4h - wb 12. additional notes (a) msl (moisture sensitivity level) class 1 . (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 over 30 psi of air pressure into the port hole. ? do not pull a vacuum over port hole of the microphone. ? do not apply a vacuum when repacking into sealed bags at a rate faster than 0.5 atm/sec. 13. materials statem ent meets the requirements of t he european rohs directive, 2011 / 6 5/ec as amended. meets the requirements of the industry - standard iec 61249 - 2 - 21:2003 for halogenated substances and knowles green materials standards policy section on halogen - free. ozone depleting substances are not used in the product or the processes used to make the product including compounds listed in annex a, b, and c of the montreal protocol on substances that deplete the ozone layer.
revision: c 2 / 2 8 /201 3 sheet 12 of 13 ?201 3 knowles electronics spm0423hd4h - wb 14. reliability specifications test description thermal shock 100 cycles air - to - air thermal shock from - 40 o c to +12 5 o c with 15 minute soa k s . (iec 68 - 2 - 4) high temperature storage 1,000 hours at +10 5 o c environment (iec 68 - 2 - 2 test ba) low temperature storage 1,0 00 hours at - 40 o c environment (iec 68 - 2 - 2 test aa) high temperature bias 1,000 hours at +10 5 o c under bias (iec 68 - 2 - 2 test ba) low temperature bias 1,0 00 hours at - 40 o c under bias (iec 68 - 2 - 2 test aa) temperature / humidity bias 1,000 hours at + 85 o c/85% r.h. under bias. (jesd22 - a101a - b) vibration 4 cycles of 20 to 2,000 hz s inusoidal sweep with 20 g peak acceleration lasting 1 2 minutes in x, y, and z directions. ( mil - std - 883e, method 2007.2 a) esd - hbm 3 discharges of 2 kv direct contact to i/o pins. (esd stm5.2) esd - lid/gnd 3 discharges of 8 kv direct contact to lid while unit is grounded. (iec 61000 - 4 - 2) esd - mm 3 discharges of 2 kv direct contact to i/o pins. (mil 883e, method 3015.7) reflow 5 reflow cycles with peak temperature of + 260 o c mechanical shock 3 pulses of 10,000 g in the x, y, and z direction (iec 68 - 2 - 27, test ea) note: after reliability tests are performed, the sensitivity of the microphones shall not deviate more than 3 db from its initial value.
revision: c 2 / 2 8 /201 3 sheet 13 of 13 ?201 3 knowles electronics spm0423hd4h - wb 15. specifications revisions revision specification changes date a initial release (c1011 1410 ) 6/30 / 1 0 b typographical error and format changes. 10 / 20 / 1 0 c new rohs statement (c10114438) ; updated humidity conditions and esd description s (c10114466); released in new format (c10114628) 2 / 2 8 / 13 i nformation contained herein is subject to change without notice. it may be used by a party at their own discretion and risk. we do not guarantee any results or assume any liability in connection with its use. this publication is not to be taken as a license to operate under any exis ting patents.

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