For more information, please visit the product page. date 04/2015 page 1 of 4 ELECTRET CONDENSER PART NUMBER:DESCRIPTION: CME-1538-100LB MICROPHONE SPECIFICATIONS parameter conditions/description directivity omnidirectional sensitivity f= 1 KHz, 1Pa 0 dB= 1 V/Pa min typ max -41 -38 -35 dB 2 10 Vdc operating voltage output impedance f= 1 KHz, 1Pa sensitivity reduction f= 1 KHz, 1Pa Vs=2 V dc to 1.5 V dc frequency 2.2 kΩ -3 dBA 20 current consumption Vs=2 V dc RL=2.2 kΩ signal to noise ration f= 1 KHz, 1 Pa A weighted units 20,000 Hz 0.5 mA 58 dBA operating temperature -30 80 °C storage temperature -30 80 °C 0.36 g dimensions ø4 x H1.5 mm weight material brass (Au plating) terminal wire type RoHS 2011/65/EU dustproof/waterproof level Notes: IP67, IEC standard 529 edition 2.0 (1989) 1. We use the “Pascal (Pa)” indication of sensitivity as per the recomendation of I.E.C. (International Electrotechnical Commission). The sensitivity of “Pa” will increase 20dB compared to the “ubar” indication. Example: -60dB (0dB = 1V/ubar) = -40dB (1V/Pa) 2. All specifications measured at 5~35°C, humidity at 45~85%, under 86~106kPa pressure, unless otherwise noted. APPEARANCE DRAWING unit: mm tolerance: ±0.2 wire: UL1571 32 AWG 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383 www.cui.com For more information, please visit the product page. date 04/2015 page 2 of 4 ELECTRET CONDENSER PART NUMBER:DESCRIPTION: CME-1538-100LB MICROPHONE FREQUENCY RESPONSE CURVE ˃ ˀ˄˃ ˀ˅˃ ˀˆ˃ ˀˇ˃ ˀˈ˃ ˀˉ˃ ˀˊ˃ ˀˋ˃ ˄˃˃ ˄˃˃˃ ˄˃˃˃˃ MEASUREMENT CIRCUIT 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383 www.cui.com ˄˃˃˃˃˃ For more information, please visit the product page. date 04/2015 page 3 of 4 ELECTRET CONDENSER PART NUMBER:DESCRIPTION: CME-1538-100LB MICROPHONE MECHANICAL CHARACTERISTICS item test condition evaluation standard soldering heat resistance Stripped wires are immersed in rosin for 5 seconds and then immersed in solder bath of 270 ±5°C for 3 ±0.5 seconds. 90% min. stripped wires should be wet with solder (except edge of terminal). PCB wire pull strength The force of 4.9 N is applied for 30 sec. to double lead wire. No damage or cutting off. vibration test The microphone should be measured after a vibration amplitude of 1.5 mm with 10 ~ 55 Hz band of vibration frequency to each of the 3 perpendicular directions for 2 hours. drop test The microphone without packaging is subjected to 3 drops on each axis from the height of 100 cm onto a 20 mm thick wooden board. The sensitivity should be within ±3dB compared with the initial measurement. ENVIRONMENT TEST item test condition evaluation standard high temperature test After being placed in a chamber at +80°C for 1 hour. low temperature test After being placed in a chamber at -30°C for 1 hour. humidity test After being placed in a chamber at +40°C and 90 ±5% RH for 240 hours. temperature cycle test The part will be subjected to 10 cycles. One cycle will consist of: +80к +25к +25к -30к 1hr 0.5hr 1hr 0.5hr 1hr 0.5hr The microphone will be measured after being placed at +25°C for 6 hours. The value of the oscillation frequency should be ±10% compared to the initial measurements. The SPL should be within ±3dB compared to the initial measurements. 1hr 5.5 hrs TEST CONDITIONS standard test conditions a) Temperature: +5 ~ +35°C b) Humidity: 45 ~ 85% c) Pressure: 860 ~ 1060 mbar judgement test conditions a) Temperature: +25 ±2°C b) Humidity: 60 ~ 70% c) Pressure: 860 ~ 1060 mbar 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383 www.cui.com For more information, please visit the product page. date 04/2015 page 4 of 4 ELECTRET CONDENSER PART NUMBER:DESCRIPTION: CME-1538-100LB MICROPHONE PACKAGING 20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383 www.cui.com