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page 1 of 22 ?2011 knowles electronics 2403 260 00087 receiver - 615 - 2 - sc - franklin the 6x15x2.0 mm rectangular franklin receiver is a high end miniature receiver specifically designed for mobile phones and smartphones where high quality voice transmission is required. features: ? high sensitivity (71 db/w/m) ? additional dust protection meshes on rear ? 6khz peak optimized for extended range without additional resonators ? spring contacts for pick&place ? compound membrane for minimum thd, q - factor and tumbling ? 100% in - line measurement of specified acoustical and electrical parameters
page 2 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 contents 1. theory of operation ............................................................................................................................. 3 2. mechani cal layout and dimensions .................................................................................................... 4 2.1. main dimensions ......................................................................................................................... 4 2.2. pwb layout ................................................................................................................................. 5 2.3. spring force ................................................................................................................................. 5 2.4. forces on component .................................................................................................................. 6 2.5. part marking/labeling ................................................................................................................. 7 2.6. material list ................................................................................................................................. 8 3. electrical and acoustical specifications ............................................................................................... 9 3.1. frequency response and tnd - baffle ........................................................................................... 9 3.2. frequency response and thd - 3.2hl coupler ........................................................................... 10 3.3. electro - acoustic parameters ..................................................................................................... 11 3.4. power handling .......................................................................................................................... 12 3.5. measurement setup .................................................................................................................. 13 3.6. measured parameters ............................................................................................................... 14 3.7. measurement adapter .............................................................................................................. 15 4. environmental conditions ................................................................................................................. 16 4.1. storage ....................................................................................................................................... 16 4.2. transportation ........................................................................................................................... 16 4.3. functionality .............................................................................................................................. 16 5. environmental tests .......................................................................................................................... 17 5.1. qualification tests ...................................................................................................................... 17 5.2. reliability tests .......................................................................................................................... 17 5.3. sample size, sequence .............................................................................................................. 17 5.4. period of shelf - lif e .................................................................................................................... 17 5.5. testing procedures .................................................................................................................... 17 6. related documents ........................................................................................................................... 21 7. change history .................................................................................................................................. 22 8. disclaimer .......................................................................................................................................... 22
page 3 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 1. theory of operation receiver - 615- 2 - sc - franklin is a electro dynamic transducer, designed to translate electrical analog signals into sound. the input signal is fed into a coil in a magnetic field, which is attached to a membrane. through the principl e of the electromagnetic force, the membrane is moved according to the contents of the input signal.
page 4 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 2. mechani cal layout and dimensions 2.1. main dimensions
page 5 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 2.2. pwb layout 2.3. spring force
page 6 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 2.4. forces on component
page 7 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 2.5. part marking/labeling the products have a serial number on bottom side semiline: autoline:
page 8 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 2.6. material list 1. material of basket: polycarbonate 2. material of membrane: polyarylate - compound 3. material of pot: soft magnetic iron 4. material of magnet: nd fe b 5. material of contact crni - steel, gold plated 6. material of cover: brass 7. rear mesh: acrylic 8. dimensions: 6x15x2 mm 9. mass: 0,5 g
page 9 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 3. electrical and acoustical specifications 3.1. frequency response and tnd - baffle tolerance window f [hz] lower limit [db spl] upper limit [db spl] f [hz] upper limit [%thd] 160 73 88 200 70 350 - 98 300 40 450 91 - 600 10 700 91 98 1000 5 1000 91 97 5000 5 3500 91 97 6000 10 5900 94 - 6100 90 - 6500 - 103
page 10 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 3.2. frequency response and thd - 3.2hl coupler tolerance window f [hz] lower limit [db spl] relative to 1khz upper limit [db spl] relative to 1khz f [hz] upper limit [%thd] 200 - 20 - 11 200 80 400 - 9 - 1 300 50 900 - 5 2 600 15 1000 0 0 1500 5 1100 - 3 4 6000 5 1500 5 - 1600 - 14 1700 5 14 2300 - 4 - 2500 - 1 3700 - 6 - 4000 - 0 6000 - 26 - 10
page 11 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 3.3. electro - acoustic parameters loudspeaker mounted in adapter acc. to 3.6 . 1. rated impedance z: 32 ? 2. voice coil resistance r: 28.8 ? 10% 3. resonance frequency (measured @20mw) f 0 : 400hz 12% 4. maximum usable excursion x max p - p : 0.64mm p - p 5. nominal characteristic sensitivity (calculated for 1w in 1m) 712db average from 1khz to 3khz 5.1. measured characteristic sensitivity (at 20mw in 1cm) 942db average from 1khz to 3khz 6. thd according chapter 3.1 . 7. rub & buzz < 60dbspl (200hz - 2000hz) in 1cm at 20mw (800mv eff ) all acoustic measurements at 23 2c
page 12 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 3.4. power handling receiver mounted in lifetime test device (open rear/open front) (pink noise shaped according to diagram below, crest factor 2) 1. max short term power (0,5sec. on / 3sec. off) 50mw (rms) signal: lifetime test signal 2. max continuous power (500h) 20mw (rms) signal: lifetime test signal lifetime test signal: pink noise, 6db crest factor, filtered with 2 nd order high pass filter at 400hz and with 2 nd order low pass filter at 1 0khz
page 13 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 3.5. measurement setup d analyzer power amplifier iec baffle freefield microphone 1/4 r q,including wiring <0,3 ?
page 14 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 3.6. measured parameters 3.6.1. sensitivity spl is expressed in db rel 20 pa, computed according to iec 268 - 5. measurement set up and parameters according chapter 3.4 . this test is performed for 100% of products in the production line. 3.6.2. frequ ency response frequency response is measured according test set up in chapter 3.4 data sheet and checked against the tolerance window defined in chapter 3.1 . this test is performed for 100% of products in the production line. 3.6.3. total harmonic distortion (thd) is measured according iec 268 - 5 (2nd to 5th harmonics) and test set up in chapter 3.4 . this test is performed for 100% of products in the production line. 3.6.4. rub& buzz rub & buzz will be measured in the inline - measuring device with a sinusoidal sweep. rub & buzz is defined as the maximum level of no harmonic energy, expressed as signal to non - harmonic content ratio, in a certain frequency - range. signal and evaluation criteria are according to chapter 3.2 . this test is performed for 100% of products in the production line.
page 15 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 3.7. measurement adapter
page 16 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 4. environmental conditions 4.1. storage the transducer fulfi l ls the specified data after treatment according to the conditions of ets 300 019 - 2 - 1 specification of environmental test: storage test spec. t 1.2: weather protected, not temperature controlled storage locations. 4.2. transportation the transducer fulfil l s the specified data after treatment according to the conditions of ets 300 019 - 2 - 2 specification of environmental test: transportation test spec. t 2.3: public transportation 4.3. functionality the transducer fulfil l s the specified data after treatment according to the conditions of ets 300 019 - 2 - 5 specification of environmental test: ground vehicle installations test spec. t 5.1: protected installation ets 300 019 - 2 - 7 specification of environmental test: portable and non - stationary use test spec. t 7.3e: partly weather protected and non - weather protected locations.
page 17 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 5. environmental tests 5.1. qualification tests according to our milestone plan (product creation process), a complete qualification test will be done at design validation of products manufactured under serial conditions. 1x per year and product family a requalification takes place. the qualification process covers all tests described under 5.5 and a complete inspection. 5.2. reliability tests 1x per month and product family samples are taken and su bmitted to tests described under 5.5.2 5.3. sample size, sequence unless otherwise stated 20 arbitrary new samples will be used to perform each test for both, qualificat ion and requalification test as described under 5.1 and 5.2 . 5.4. period of shelf - life the period of shelf - life is 2 years. 5.5. testing procedures 5.5.1. storage tests 5.5.1.1. cold storage test parameter test method and conditions duration evaluation standard low temperature storage (ref. en 60068 - 2 - 1) - 40 c rel. humidity not controlled 168h measurements after 2 hours recovery time. all samples fully operable. all acoustical parameters according specification with tolerances increased by 50 %. 5.5.1.2. heat storage test parameter test method and conditions duration evaluation standard dry heat storage (ref. en 60068 - 2 - 2) +85 c rel. humidity not controlled 168h measurements after 2 hours recovery time. all samples fully operable. all acoustical parameters according specification with tolerances increased by 50 %.
page 18 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 5.5.1.3. temperature cycle test parameter test method and conditions duration evaluation standard change of temperature (ref. en 60068 - 2 - 14) - 40 c/+85 c transition time <3 min. see figure 5 - 1 below 5 cycles >2h for each temperature measurements after 2 hours recovery time. all samples fully operable. all acoustical parameters according specification with tolerances increased by 50 %. -40c +85c 2h 2h 3m 3m 2h 2h 3m 3m 2h 2h 3m 3m 2h 2h 3m 3m 3m 3m 2h 2h figure 5 - 1 : temperature cycle test 5.5.1.4. temperature / humidity cycle test parameter test method and conditions duration evaluation standard damp heat, cyclic (ref. iec 60068 - 2 - 30) +25 c/+55 c 90% to 95% rh. temp. change time <3h see figure 5 - 2 below caution: no condensed water on products! 6 cycles / 144h 12 h at each temperature (inclusive temp ramp up/down) measurements after 2 hours recovery time. all samples fully operable. all acoustical parameters according specification with tolerances increased by 50 %. +25c +55c 9h 9h 3h 3h 9h 9h 3h 3h 9h 9h 3h 3h 9h 9h 3h 3h 9h 9h 3h 3h 9h 9h 3h 3h figure 5 - 2 : temperature / relative humidity cycle test
page 19 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 5.5.2. operating tests 5.5.2.1. cold operation test parameter test method and conditions duration evaluation standard cold operation test (ref. en 60068 - 2 - 1) - 20 c rel. humidity not controlled signal acc. chapter 3.3 72h measurements after 2 hours recovery time. all samples fully operable. thd may be increased after test. all other acoustical parameters according specification with tolerances increased by 50 %. 5.5.2.2. dry heat operation test parameter test method and conditions duration evaluation standard dry heat operation (ref. en 60068 - 2 - 2) +70 c rel. humidity not controlled signal acc. chapter 3.3 500h measurements after 2 hours recovery time. all samples fully operable. the allowable change in sensitivity shall not be greater than 3 db. all other acoustical parameters according specif ication with tolerances increased by 50 %. 5.5.3. salt mist test parameter test method and conditions duration evaluation standard salt mist (ref. iec60068 - 2 - 52, kb / severity 2 the part must be subjected to 2 hours spray of 5% nacl salt mist, at 35c then be left at 40 c and 95% rh for 22h. 3 cycles the samples shall be washed after the test with distilled water and dried at t< 50c. component may have reduced performance, but must still function properly. the allowable sensitivity difference shall not be grea ter than 3db from initial sensitivity.
page 20 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 5.5.4. guided free fall test - protected product parameter test method and conditions conditions / sample size evaluation standard mechanical shock (ref. iec60068 - 2 - 32 ed), procedure 1 speaker in drop test box or representative mechanics from a height of 1.5m onto concrete floor. 30 units two drops on each side (2x6) one drop on each edge (1x12) two drops on each corner (2x8) (40 drops in total) component may have reduced performance, but must still function prop erly. the allowable sensitivity difference shall not be greater than 3db from initial sensitivity. 5.5.5. random free fall test (tumble test) C protected product parameter test method and conditions conditions / sample size evaluation standard impact durability (in a tumble tester) (ref. iec60068 - 2 - 32 ed) (spr a7.1.1) speaker in drop test box or representative mechanics. random drops on steel base. 30 units 180 drops, 1m dut power off component may have reduced performance, but must still function properly. the allowable sensitivity difference shall not be greater than 3 db from initial sensitivity. 5.5.6. resistance to electrostatic discharge parameter test method and conditions conditions / sample size evaluation standard resistance to esd iec61000 - 4 - 2 level 4 (spr c 2.5.1) one pole is grounded and the esd pulse is applied to the other pole. the speaker must be stressed first with one polarisation and then with the other polarisation. dut must be discharged between each esd exposure. level 4 : contact +/ - 8kv, air +/ - 15kv 10 exposures on each polarity / 5 units dut power off all samples fully operable. all acoustical parameters according specification with tolerances increased by 50%.
page 21 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 6. related documents iec 268 - 5 sound system equipment part 5: loudspeaker iec 68 - 2 environmental testing en 60068 - 2 environmental testing iso 2859 - 1 sampling procedures for inspection by attributes part 1: sampling plans indexed by acceptable quality level (aql) for lot - by - lot inspection iso 3951 sampling procedures and charts for inspection by variables for percent defectives. ets 300 019 - 2 - 1 specification of environmental test: storage test spec. t 1.2: weather protected, not temperature controlled storage locations ets 300 019 - 2 - 2 specification of env ironmental test: transportation test spec. t 2.3: public transportation ets 300 019 - 2 - 5 specification of environmental test: ground vehicle installations test spec. t 5.1: protected installation ets 300 019 - 2 - 7 specification of environmental test: portab le and non - stationary use test spec. t 7.3e: partly weather protected and non - weather protected locations
page 22 of 22 ?2011 knowles electronics release C revision: a 2403 260 00087 7. change history status version date ecr comment / changes initials of owner release a 03.04.12 3654 first release cs/et/ek/cp /rb 8. disclaimer stresses above the absolute maximum ratings may cause permanent damage to the device. these are stress ratings only. the device may not function when operated at these or any other conditions beyond th ose indicated under electrical and acousti cal specifications. exposure beyond those indicated under electrical and acoustical specifications for extended periods may affect device reliability. the information contained in this literature is based on our experience to date and is believed to be reliable and it is subj ect to change without notice. it is intended as a guide for use by persons having technical skill at their own disc retion and risk. we do not guarantee favorable results or assume any liability in connection with its use. dimensions contained herein are for reference purposes only. for specific dimensional requirements c onsult factory. this publication is not to be tak en as a license to operate under, or recommendation to infringe any exiting patents. this supersedes and voids all previous l iterature. this product is not qualified f or use in automotive applications frequency range for telekom use

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