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 1 of 22 ©2011 Knowles Electronics 2403 260 00087 Contents 1. Theory of operation............................................................................................................................. 3 2. Mechanical 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-Life ....................................................................................................................17 5.5. Testing Procedures ....................................................................................................................17 6. Related Documents ........................................................................................................................... 21 7. Change History .................................................................................................................................. 22 8. Disclaimer .......................................................................................................................................... 22 Release – Revision: A Page 2 of 22 ©2011 Knowles Electronics 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 principle of the electromagnetic force, the membrane is moved according to the contents of the input signal. Release – Revision: A Page 3 of 22 ©2011 Knowles Electronics 2403 260 00087 2. Mechanical Layout and Dimensions 2.1. Main Dimensions Release – Revision: A Page 4 of 22 ©2011 Knowles Electronics 2403 260 00087 2.2. PWB Layout 2.3. Spring Force Release – Revision: A Page 5 of 22 ©2011 Knowles Electronics 2403 260 00087 2.4. Forces on component Release – Revision: A Page 6 of 22 ©2011 Knowles Electronics 2403 260 00087 2.5. Part Marking/Labeling The products have a serial number on bottom side SEMILINE: AUTOLINE: Release – Revision: A Page 7 of 22 ©2011 Knowles Electronics 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 Release – Revision: A Page 8 of 22 ©2011 Knowles Electronics 2403 260 00087 3. Electrical and Acoustical Specifications 3.1. Frequency response and TND-Baffle f [Hz] 160 350 450 700 1000 3500 5900 6100 6500 Release – Revision: A lower limit [dB SPL] 73 91 91 91 91 94 90 - Tolerance window upper limit f [dB SPL] [Hz] 88 200 98 300 600 98 1000 97 5000 97 6000 103 Page 9 of 22 upper limit [%THD] 70 40 10 5 5 10 ©2011 Knowles Electronics 2403 260 00087 3.2. Frequency Response and THD-3.2HL Coupler f [Hz] 200 400 900 1000 1100 1500 1600 1700 2300 2500 3700 4000 6000 Release – Revision: A lower limit [dB SPL] relative to 1kHz -20 -9 -5 0 -3 5 5 -4 -6 -26 Tolerance window upper limit [dB SPL] relative to 1kHz -11 -1 2 0 4 14 14 1 0 -10 Page 10 of 22 f [Hz] upper limit [%THD] 200 300 600 1500 6000 80 50 15 5 5 ©2011 Knowles Electronics 2403 260 00087 3.3. Electro-acoustic Parameters Loudspeaker mounted in adapter acc. to 3.6. 1. Rated impedance Z: 32Ω 2. Voice coil resistance R: 28.8Ω±10% 3. Resonance frequency (measured @20mW) f0: 400Hz±12% p-p: 0.64mm p-p 4. Maximum usable excursion xmax 5. Nominal characteristic sensitivity (calculated for 1W in 1m) average from 1kHz to 3kHz 71±2dB 5.1. Measured characteristic sensitivity (at 20mW in 1cm) average from 1kHz to 3kHz 94±2dB 6. THD 7. Rub & buzz according chapter 3.1. < 60dBSPL (200Hz -2000Hz) in 1cm at 20mW (800mVeff) All acoustic measurements at 23±2°C Release – Revision: A Page 11 of 22 ©2011 Knowles Electronics 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 Signal: lifetime test signal (0,5sec. ON / 3sec. OFF) 50mW (RMS) 2. Max continuous power Signal: lifetime test signal (500h) 20mW (RMS) Lifetime Test Signal: pink noise, 6dB crest factor, filtered with 2nd order high pass filter at 400Hz and with 2nd order low pass filter at 10kHz Release – Revision: A Page 12 of 22 ©2011 Knowles Electronics 2403 260 00087 3.5. Measurement setup IEC BAFFLE Rq,including wiring <0,3Ω freefield microphone 1/4“ power amplifier analyzer ≈ d Release – Revision: A Page 13 of 22 ©2011 Knowles Electronics 2403 260 00087 3.6. Measured Parameters 3.6.1. Sensitivity SPL is expressed in dB rel 20µPa, 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. Frequency 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. Release – Revision: A Page 14 of 22 ©2011 Knowles Electronics 2403 260 00087 3.7. Measurement adapter Release – Revision: A Page 15 of 22 ©2011 Knowles Electronics 2403 260 00087 4. Environmental Conditions 4.1. Storage The transducer fulfills 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 fulfills 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 fulfills the specified data after treatment according to the conditions of ETS 300 019-2-5 ETS 300 019-2-7 Release – Revision: A Specification of environmental test: Ground vehicle installations Test spec. T 5.1: Protected installation Specification of environmental test: Portable and non-stationary use Test spec. T 7.3E: Partly weather protected and non-weather protected locations. Page 16 of 22 ©2011 Knowles Electronics 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 submitted 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, qualification 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 -40°C 168h Measurements after 2 hours recovery time. (Ref. EN 60068-2-1) rel. humidity not controlled 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 +85°C 168h (Ref. EN 60068-2-2) rel. humidity not controlled Measurements after 2 hours recovery time. All samples fully operable. All acoustical parameters according specification with tolerances increased by 50 %. Release – Revision: A Page 17 of 22 ©2011 Knowles Electronics 2403 260 00087 5.5.1.3. Temperature Cycle Test Parameter Test Method and Conditions Duration Evaluation Standard Change of Temperature -40°C/+85°C 5 cycles (Ref. EN 60068-2-14) Transition time <3 min. See Figure 5-1 below >2h for each temperature Measurements after 2 hours recovery time. All samples fully operable. All acoustical parameters according specification with tolerances increased by 50 %. +85°C -40°C 2h 3m 2h 3m 2h 3m 2h 3m 2h 3m 2h 3m 2h 3m 2h 3m 2h 3m 2h 3m 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 +25°C/+55°C 6 cycles / 144h (Ref. IEC 60068-2-30) 90% to 95% RH. 12h at each temperature (inclusive temp ramp up/down) Measurements after 2 hours recovery time. Temp. change time <3h See Figure 5-2 below Caution: no condensed water on products! All samples fully operable. All acoustical parameters according specification with tolerances increased by 50 %. +55°C +25°C 9h 3h 9h 3h 9h 3h 9h 3h 9h 3h 9h 3h 9h 3h 9h 3h 9h 3h 9h 3h 9h 3h 9h 3h Figure 5-2: Temperature / Relative Humidity Cycle Test Release – Revision: A Page 18 of 22 ©2011 Knowles Electronics 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 -20°C 72h (Ref. EN 60068-2-1) rel. humidity not controlled 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 %. signal acc. Chapter 3.3 5.5.2.2. Dry Heat Operation Test Parameter Test Method and Conditions Duration Evaluation Standard Dry Heat Operation +70°C 500h (Ref. EN 60068-2-2) rel. humidity not controlled 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 specification with tolerances increased by 50 %. signal acc. Chapter 3.3 5.5.3. Salt Mist Test Parameter Test Method and Conditions Duration Evaluation Standard Salt Mist The part must be subjected to 2 hours spray of 5% NaCl salt mist, at 35°C 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< 50°C. (Ref. IEC60068-2-52, Kb / Severity 2 Release – Revision: A Component may have reduced performance, but must still function properly. The allowable sensitivity difference shall not be greater than ±3dB from initial sensitivity. Page 19 of 22 ©2011 Knowles Electronics 2403 260 00087 5.5.4. Guided Free Fall Test - protected product Parameter Test Method and Conditions Conditions / Sample size Evaluation Standard Mechanical shock 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) Component may have reduced performance, but must still function properly. The allowable sensitivity difference shall not be greater than ±3dB from initial sensitivity. (Ref. IEC60068-2-32 Ed), Procedure 1 One drop on each edge (1x12) Two drops on each corner (2x8) (40 drops in total) 5.5.5. Random Free Fall Test (Tumble Test) – protected product Parameter Test Method and Conditions Conditions / Sample size Evaluation Standard Impact durability (in a Tumble Tester) Speaker in drop test box or representative mechanics. Random drops on steel base. 30 units Component may have reduced performance, but must still function properly. The allowable sensitivity difference shall not be greater than ±3 dB from initial sensitivity. (Ref. IEC60068-2-32 Ed) 180 drops, 1m DUT power off (SPR a7.1.1) 5.5.6. Resistance to Electrostatic Discharge Parameter Test Method and Conditions Conditions / Sample size Evaluation Standard Resistance to ESD 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. 10 exposures on each polarity / 5 units All samples fully operable. IEC61000-4-2 Level 4 (SPR c 2.5.1) DUT Power off All acoustical parameters according specification with tolerances increased by 50%. Level 4: contact +/- 8kV, air +/- 15kV Release – Revision: A Page 20 of 22 ©2011 Knowles Electronics 2403 260 00087 6. Related Documents IEC 268-5 IEC 68-2 EN 60068-2 ISO 2859 - 1 ISO 3951 ETS 300 019-2-1 ETS 300 019-2-2 ETS 300 019-2-5 ETS 300 019-2-7 Release – Revision: A Sound System equipment Part 5: Loudspeaker Environmental testing Environmental testing Sampling procedures for inspection by attributes Part 1: Sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection Sampling procedures and charts for inspection by variables for percent defectives. Specification of environmental test: Storage Test spec. T 1.2: Weather protected, not temperature controlled storage locations Specification of environmental test: Transportation Test spec. T 2.3: Public Transportation Specification of environmental test: Ground vehicle installations Test spec. T 5.1: Protected installation Specification of environmental test: Portable and non-stationary use Test spec. T 7.3E: Partly weather protected and non-weather protected locations Page 21 of 22 ©2011 Knowles Electronics 2403 260 00087 7. Change History Status Version Release 8. A Date 03.04.12 ECR 3654 Comment / Changes Initials of owner First Release CS/ET/EK/CP/RB 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 those indicated under “Electrical and Acoustical Specifications”. Exposure beyond those indicated under “Electrical and Acoustical Specifications” for extended periods may affect device reliability. This product is not qualified for use in automotive applications Frequency range for Telekom use The information contained in this literature is based on our experience to date and is believed to be reliable and it is subject to change without notice. It is intended as a guide for use by persons having technical skill at their own discretion 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 consult factory. This publication is not to be taken as a license to operate under, or recommendation to infringe any exiting patents. This supersedes and voids all previous literature. Release – Revision: A Page 22 of 22 ©2011 Knowles Electronics