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revision: a 5 / 16 /2014 sheet 1 of 15 ?2014 knowles electronics sph0641lu4h - 1 digital zero - height sisonic tm microphone with multi - mode and ultras onic s upport the sph0641lu 4h - 1 is a miniature, high - performance, low power, bottom port silicon digital microphone with a single bit pdm output. using knowles proven high performance sisonic tm mems technology, the sph0641lu 4h - 1 con sists of a n acoustic sensor, a low noise input buffer , and a sigma - delta modulator. thi s microphone is suitabl e for applications such as cell phones, smart phones, laptop computers, sensors, digital still cameras, portable music recorders, and ot her portable electronic devices where excellent wideband audio performance and rf immunity are required. in addition, the sph0641lu 4h - 1 offers multiple performance modes and supports ultrasonic applications . featur es: ? high snr of 64db ? low current consumption of 23 5 ua in low - power mode ? multiple performance modes (sleep, low - power, standard performance and ultrasonic modes) ? flat frequency response ? rf shielded ? zero - height mic tm ? supports dual multiplexed channels ? standard smd reflow ? omnidirectional ? ultrasonic support ? sensitivity matching ? small size
revision: a 5 / 16 /2014 sheet 2 of 15 ?2014 knowles electronics sph0641lu 4h - 1 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 acoustic & electrical specifications for extended periods may affect device reliability. 2. acousti c & 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 general microphone specifications parameter symbol conditions min typ max units supply voltage v dd 1.62 - 3.6 v clock frequency range sleep mode 0 250 khz low - power mode 351 81 5 khz standard performance mode 1.024 2.475 mhz ultrasonic mode 3.072 4.8 mhz sleep current 1 , 3 i sleep f clock 250 khz - 80 a dc output fullscale = 100 - 0 - % fs directivity omnidirectional polarity increasing sound pressure increasing density of 1s data format ? cycle pdm short circuit current i sc grounded data pin 1 - 20 ma output load c load - - 140 pf fall - asleep time 4 , 5 f clock 250 khz - - 1 0 ms wake - up time 4 , 6 f clock 351 khz - - 15 ms power - up time 4 , 6 v dd v(min) - - 50 ms mode - change time 4 - - 10 ms
revision: a 5 / 16 /2014 sheet 3 of 15 ?2014 knowles electronics sph0641lu 4h - 1 ultrasonic mode test conditions: f clock = 3.072 mhz, v dd =1.8 v, unless otherwise indicated parameter symbol conditions min typ max units supply current 2 , 3 i dd - 845 10 00 a sensitivity s 94 db spl @ 1 khz - 27 - 26 - 25 dbfs signal to noise ratio snr 94 db spl @ 1 khz, a - weighted - 6 4 .3 - db(a) total harmonic distortion thd 94 db spl @ 1 khz, s = typ - 0.2 - % acoustic overload point aop 10% thd @ 1 khz, s = typ - 120 - db spl power supply rejection ratio psrr 200 mvpp sinewave @ 1 khz - 55 - dbv / fs power supply rejection psr +n 100 mvpp square wave @ 217 hz, a - weighted - - 8 4 - dbfs (a) standard performance mode test conditions: f clock = 2. 4 mhz , v dd =1.8 v, unless otherwise indicated parameter symbol conditions min typ max units supply current 1 , 2, 3 i dd f clock = 2 .4 mhz - 6 2 0 70 0 a sensitivity 1 s 94 db spl @ 1 khz - 2 7 - 26 - 2 5 dbfs signal to noise ratio snr 94 db spl @ 1 khz, a - weighted, f clock =2. 4 mhz - 6 4 .3 - db(a) total harmonic distortion thd 94 db spl @ 1 khz, s = typ - 0.2 - % acoustic overload point aop 10% thd @ 1 khz, s = typ - 120 - db spl power supply rejection ratio psrr 200 mvpp sinewave @ 1 khz - 55 - dbv/fs power supply rejection psr +n 100 mvpp square wave @ 217 hz, a - weighted - - 8 4 - dbfs (a)
revision: a 5 / 16 /2014 sheet 4 of 15 ?2014 knowles electronics sph0641lu 4h - 1 low - p ower mode test conditions: f clock = 76 8 k hz, v dd =1.8 v, unless otherwise indicated parameter symbol conditions min typ max units supply current 2 , 3 i dd f clock = 768 k hz - 2 3 5 27 0 a sensitivity s 94 db spl @ 1 khz - 2 7 - 2 6 - 2 5 dbfs signal to noise ratio snr 94 db spl @ 1 khz, a - weighted (20 h z - 8 k hz) - 6 4 - db(a) total harmonic distortion thd 94 db spl @ 1 khz, s = typ - 0.2 - % acoustic overload point aop 10% thd @ 1 khz, s = typ - 12 0 - db spl power supply rejection ratio psrr 200 mvpp sinewave @ 1 khz - 59 - dbv/fs power supply rejection psr +n 100 mvpp square wave@ 217 hz, a - weighted (20hz - 8khz) - - 8 6 - dbfs (a) microphone interface specifications parameter symbol conditions min typ max units logic input high v ih 0.7 xv dd - 3.6 v logic input low v il - 0.3 - 0.3 xv dd v logic output high v oh i out = 2 ma v dd - 0.45 - v dd v logic output low v ol i out = 2 ma 0 - 0.45 v clock duty cycle f clock 2.4 mhz 40 - 60 % 2.4mhz < f clock 4.8 mhz 48 50 52 % clock rise/fall time t edge - - 3 ns delay time for data assertion t d d 18 28 40 ns delay time for high z 7 t dz 3 - 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 typical and maximum 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), low - power mode (low clock speed), standard performance m ode (normal operation), and ultrasonic mode (high clock speed) . 5 time from f clock < 250 khz to i sleep specification is met when transitioning from active mode to sleep mode. 6 time from f clock 35 1 k hz to al l applicable specifications are met when transitioning from sleep mode to active mode . 7 t hold is dependent on c load .
revision: a 5 / 16 /2014 sheet 5 of 15 ?2014 knowles electronics sph0641lu 4h - 1 3. microphone state diagram standard performance mode 3.6 v dd 1.62 v 1.024 mhz f clock 2.475 mhz sleep mode 3.6 v dd 1.62 v f clock 250 khz ultrasonic mode 3.6 v dd 1.62 v 3.072 mhz f clock 4.8 mhz low - power mode 3.6 v dd 1.62 v 3 5 1 khz f clock 815 khz powered down mode v dd = 0 v
revision: a 5 / 16 /2014 sheet 6 of 15 ?2014 knowles electronics sph0641lu 4h - 1 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 db (normalized to 1khz) frequency (hz) typical free field response normalized to 1 khz clk=2.4mhz vdd=1.8v
revision: a 5 / 16 /2014 sheet 7 of 15 ?2014 knowles electronics sph0641lu 4h - 1 5. ultrasonic response curve -20 -18 -16 -14 -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 20 10,000 20,000 30,000 40,000 50,000 60,000 70,000 80,000 db (normalized to 1khz) frequency (hz) typical ultrasonic response normalized to 1khz clk=3.072mhz vdd=1.8v
revision: a 5 / 16 /2014 sheet 8 of 15 ?2014 knowles electronics sph0641lu 4h - 1 6. 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: bypass capacitors near each mic v dd pin are recommented to provide maximum snr performance. 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. 7. timing diagram v dd v dd select mic (high) data clock .1 ? f .1 ? f mic (low) select t edge d ata (select = v dd ) t dd t dv t dz c lock d ata (select = gnd) v ih v il t dv t dz high z mic (low) data high z mic (high) data v oh v ol t edge v oh v ol 1/f clock t dd t hold t hold
revision: a 5 / 16 /2014 sheet 9 of 15 ?2014 knowles electronics sph0641lu 4h - 1 8. mechanical specifications i tem d imension t olerance length (l) 3. 50 0. 10 width (w) 2. 65 0. 10 height (h) 0.98 0. 10 acoustic port ( a p) ?0. 3 25 0.05 pin # pin name type description 1 data digital o pdm output 2 select digital i lo/hi (l/r) select this pin is internally pulled low but should not be left floating. 3 ground power ground 4 clock digital i clock input 5 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: a 5 / 16 /2014 sheet 10 of 15 ?2014 knowles electronics sph0641lu 4h - 1 9. example land pattern 10. example solder stencil pattern notes: dimensions are in millimeters unless otherwise specified. detailed information on ap size considerations can be found in the latest sisonic tm design guide application note. further optimizations based on application should be performed.
revision: a 5 / 16 /2014 sheet 11 of 15 ?2014 knowles electronics sph0641lu 4h - 1 11. packag ing & marking d etail model n umber suffix reel d iameter quantity per r eel sph0641 lu 4h - 1 - 8 13 5 , 9 00 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 30 c, 70% r.h. pin 1
revision: a 5 / 16 /2014 sheet 12 of 15 ?2014 knowles electronics sph0641lu 4h - 1 12. recommended reflow profile profile feature pb - free average r amp - up rate (t smax to t p ) 3 c/second max. preheat ? temperature min (t s min ) ? temperature max (t smax ) ? time (t s min to t smax ) (t s ) 150 c 200 c 60 - 180 seconds time maintained above: ? temperature (t l ) ? time (t l ) 217 c 60 - 150 seconds peak temperature (t p ) 260 c time within 5c of actual peak temperature (t p ) 20 - 40 seconds ramp - down rate (t p to t smax ) 6 c/second max time 25 c 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: a 5 / 16 /2014 sheet 13 of 15 ?2014 knowles electronics sph0641lu 4h - 1 13. 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 ov er port hole of the microphone. ? do not apply a vacuum when repacking into sealed bags at a rate faster than 0.5 atm/sec. 14. materials statement meets the requirements of the european rohs directive 20 11 / 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 p roduct, including compounds listed in annex a, b, and c of the montreal protocol on substances that deplete the ozone layer.
revision: a 5 / 16 /2014 sheet 14 of 15 ?2014 knowles electronics sph0641lu 4h - 1 15. 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 - 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 00 v direct contact to i/o pins. (esd stm5.2) 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. after 3 reflow cycles, the sensitivity of the microphones shall not deviate more than 1 db from its initial value.
revision: a 5 / 16 /2014 sheet 15 of 15 ?2014 knowles electronics sph0641lu 4h - 1 16. specification revisions revision specification changes date a initial release (c10115945) 5 / 16 /14 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 existing patents.

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