EK SERIES ® Actual Size Features • Electret condenser microphone • High electroacoustic sensitivity • Lowest noise Knowles microphone • High resistance to mechanical shock • Rugged construction to withstand • Low vibration sensitivity severe environmental conditions • Various responses available • Available with RFI suppression ™ SENSITIVITY IN dB RELATIVE TO 1.0V/0.1 Pa (N/m2) Standard Response -40 -45 EK-3024/5024 EK-3027 EK-3032 -50 -55 -60 -65 -70 -75 -80 100 2 3 4 5 6 7 8 9 2 3 4 5 6 7 8 1000 FREQUENCY IN HERTZ Open circuit sensitivity with 1.3VDC supply ® data sheet 9 10000 Specification Data EK Series Power Requirements Supply Voltage (VS) range: 0.9 to 10VDC typical: 1.3VDC Quiescent Current Drain (@ VS = 1.3VDC) typical: 19µA maximum: 50µA Performance Load Voltage (VL) range: 0.2 to 0.9VDC typical: 0.5VDC Response/Sensitivity see curves, pages 1, 4-6 Sensitivity Range @ primary test frequency Ski Slope and Step responses: ±3dB all other responses: ±2dB Output Noise Level (A-weighted) typical: -103dBV* maximum: -100dBV (Ski Slope models) Low Supply Voltage Sensitivity Loss (Vs reduced from 1.3 to 0.9VDC) typical: 0.3dB maximum: 3.0dB Input-Referred Noise Level* (A-weighted, 1kHz ref.) typical: 24dB SPL maximum: 26dB SPL Humidity Coefficient of Sensitivity typical: 0.02dB per %RH (in the absence of condensation) Input-Referred Vibration Sensitivity* (1g acceleration, 1kHz ref.) maximum: 62dB SPL Output Impedance @ 1kHz range: 2.8 to 6.8kΩ nominal: 4.4kΩ Temperature Range operating: -17°C to 63°C storage: -40°C to 63°C Acoustic Polarity Increased pressure at sound inlet causes a positive going voltage to appear at the output terminal, relative to the negative terminal ESD Tolerance MIL-STD-750 Class 1 rating EOS/ESD-S5.1-1993 Class 2 rating Power Supply Feedthrough Attenuation typical: 14dB, output-referred *For standard, damped, undamped, and broadband models only Mechanical Weight 0.13 grams Case Material Type 305 stainless steel Dimensions See outline drawings, page 7 Solder Content Sn63Pb37 Optional Soldering Fixture Base: ET-3042 Nest Plate: ET-800 Back Plate: ET-900 2 Model Variations EK Series Model Port Response EK-3024 12S Standard EK-3027 0KP Standard EK-3028 12S 6dB/octave Ski Slope EK-3029 12S 12dB/octave Ski Slope EK-3031 12S Step EK-3032 3S EK-3033 12S Damped Peak EK-3091 0KP 12dB/octave Ski Slope EK-3092 0KP 6dB/octave Ski Slope EK-3103 0KPL Broadband EK-3115 12S Step EK-3132 Ka Broadband EK-3133 12SL Broadband EK-3142 0KP Damped Peak EK-5024 12S Standard (Screenless) EK-5033 12S Damped Peak (Screenless) EK-7136 12S Undamped Peak EK-7164 3S Damped Peak EK-7276 12S Damped Peak EK-9874 12S 12dB/octave Ski Slope Standard Microphones are also available with RFI suppression filters. Other model variations available upon request. Contact Knowles Electronics for details. ® 3 SENSITIVITY IN dB RELATIVE TO 1.0V/0.1Pa (N/m2) Damped Peak Response -40 EK-3033/3142 -45 EK-5033/7276 -50 -55 -60 -65 -70 -75 -80 2 3 4 5 6 7 100 8 9 1000 2 3 4 5 6 7 8 9 10000 3 4 5 6 7 8 9 10000 FREQUENCY IN HERTZ Open circuit sensitivity with 1.3VDC supply SENSITIVITY IN dB RELATIVE TO 1.0V/0.1Pa (N/m2) Undamped Peak Response -40 EK-7136 -45 -50 -55 -60 -65 -70 -75 -80 2 100 3 4 5 6 7 8 9 1000 2 FREQUENCY IN HERTZ Open circuit sensitivity with 1.3VDC supply ® 4 SENSITIVITY IN dB RELATIVE TO 1.0V/0.1Pa (N/m2) 6dB/Octave Ski Slope Response -40 EK-3028 -45 EK-3092 -50 -55 -60 -65 -70 -75 -80 2 3 4 5 6 7 100 8 9 1000 2 3 4 5 6 7 8 9 10000 3 4 5 6 7 8 9 10000 FREQUENCY IN HERTZ Open circuit sensitivity with 1.3VDC supply SENSITIVITY IN dB RELATIVE TO 1.0V/0.1Pa (N/m2) 12dB/Octave Ski Slope Response -40 EK-3029 -45 EK-3091 -50 -55 -60 -65 -70 -75 -80 2 3 4 5 6 100 7 8 9 1000 2 FREQUENCY IN HERTZ Open circuit sensitivity with 1.3VDC supply 5 SENSITIVITY IN dB RELATIVE TO 1.0V/0.1Pa (N/m2) Step Response -40 EK-3031 -45 EK-3115 -50 -55 -60 -65 -70 -75 -80 2 3 4 5 6 7 100 8 9 1000 2 3 4 5 6 7 8 9 10000 3 4 5 6 7 8 9 10000 FREQUENCY IN HERTZ Open circuit sensitivity with 1.3VDC supply SENSITIVITY IN dB RELATIVE TO 1.0V/0.1Pa (N/m2) Broadband Response -40 EK-3103/3133 -45 EK-3132 -50 -55 -60 -65 -70 -75 -80 2 100 3 4 5 6 7 8 9 1000 2 FREQUENCY IN HERTZ Open circuit sensitivity with 1.3VDC supply 6 Signal Port Locations 1.68 1.55 ( .066 .061 2.82 2.72 ) 12S ( .111 .107 ) 4.01 3.95 5.59 5.52 ( .049 .039 ) 1.24 0.99 ( .089 .085 ) POSITIVE TERMINAL ( .076 .071 OUTER ( .057 .054 ) DIAMETER 1.14 1.04 ( .045 .041 ) 5.59 5.52 ( .049 .039 ) POSITIVE TERMINAL ( ) ( .045 .041 ) 1.24 0.99 ( NEGATIVE TERMINAL 2.26 2.15 NEGATIVE TERMINAL 1.88 1.80 ( .089 .085 ) POSITIVE TERMINAL 2.82 2.72 ( .022 .018 9 PLACES ( .158 .156 ) 1.041 1.039 ( .041 .039 ) 2 PLACES ( ) 1.80 .071 2 PLACES ( 1.75 .069 ) 5.59 5.52 .220 .218 1.24 0.99 NEGATIVE TERMINAL SOLDER BUILDUP Ka ( .111 .107 ) ) ( .089 .085 ) .64 (.025) MAXIMUM ( .076 .071 ) SOLDER BUILDUP 4.01 3.95 2.26 2.15 OUTER ( .074 .071 ) DIAMETER .64 (.025) MAXIMUM OUTPUT TERMINAL ) POSITIVE TERMINAL OUTPUT TERMINAL ( .220 .218 ) ( .158 .156 ) OUTER ( .057 .054 ) DIAMETER 1.24 .049 0.99 ( .039 ) ( .158 .156 ) 1.93 1.80 0.559 0.457 1.45 1.37 4.01 3.95 3S ( .111 .107 ) .220 .218 0KPL ( .111 .107 ) ( .080 .076 ) ( .049 .039 ) ( .066 .061 ) .64 (.025) MAXIMUM ( .042 .038 ) ( .080 .076 ) 5.59 5.52 1.14 1.04 OUTER ( .074 .071 ) DIAMETER .64 (.025) MAXIMUM 4.01 3.95 2.03 1.93 2.82 2.72 SOLDER BUILDUP 2.82 2.72 OUTER ( .057 .054 ) DIAMETER SOLDER BUILDUP 5.59 5.52 OUTPUT TERMINAL .066 .061 POSITIVE TERMINAL OUTPUT TERMINAL 2.03 1.93 1.06 0.96 1.68 1.55 NEGATIVE TERMINAL ( .158 .156 ) 1.88 1.80 1.45 1.37 ( .089 .085 ) 1.68 1.55 12SL ( .089 .085 ) ( .158 .156 ) ( .220 .218 ) 2.26 2.15 ( .220 .218 ) 2.26 2.15 NEGATIVE TERMINAL 4.01 3.95 ( .049 .039 ) 1.24 0.99 .64 (.025) MAXIMUM ( .111 .107 ) 4.01 3.95 1.24 0.99 ( .080 .076 ) SOLDER BUILDUP 2.82 2.72 ) 1.45 1.37 0KP ( .111 .107 ) 5.59 5.52 OUTPUT TERMINAL 1.93 1.80 2.03 1.93 ( .158 .156 ) ( .220 .218 ) 2.26 2.15 NEGATIVE TERMINAL 2.82 2.72 ( .049 .039 ) POSITIVE TERMINAL OUTPUT TERMINAL 2.26 2.15 ( .089 .085 ) .64 (.025) MAXIMUM SOLDER BUILDUP Dimensions in millimeters (inches) 7 EKSERIES 1/3 Octave Equivalent Noise & Output Noise 30 EK-3024 Equivalent Noise (dB SPL) 25 20 15 10 5 0 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 10000 1/3 Octave Bands (Hz) 40 Output Noise (dB re 1µV) EK-3024 20 0 -20 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300 8000 10000 1/3 Octave Bands (Hz) Knowles Electronics, Inc. 1151 Maplewood Drive Itasca, Illinois 60143 Phone: (630) 250-5100 Fax: (630) 250-0575 www.knowles.com Knowles Europe York Road, Burgess Hill West Sussex, RH15 9TT, England Phone: (44) 1444 235432 Fax: (44) 1444 248724 Knowles Electronics Japan KK Kyodo Bloom Building 19-1 Miyasaka 2-Chome Setagaya-Ku, Tokyo 156-0051, Japan Phone: (81) 3 3439 1151 Fax: (81) 3 3439 8822 Micromax Pty. Ltd. P.O. Box 1238 Wollongong N.S.W. 2500, Australia Phone: (61) 2 4226 6777 Fax: (61) 2 4226 6602 Knowles Electronics Taiwan, Ltd. 53 Pao Hsing Road Hsin Tien City, Taipei, Taiwan Republic of China Phone: (886) 2 2911 4931 Fax: (886) 2 2918 6868 NOTE: Specifications are subject to change without notice. The information on this Data Sheet reflects typical applications. Specific test specifications defining each model are available by requesting Outline Drawing Sheets 1.1 and Performance Specifications Sheets 2.1 of that model number. Knowles’ responsibility is limited to compliance with the Outline Drawing and the Performance Specification application to the subject model at time of manufacture. Knowles Electronics, Inc. 8 Issue 04 - 0801