date
page
PART NUMBER: DESCRIPTION:
04/2015
1 of 4
ELECTRET CONDENSER
MICROPHONE
CME-1538-100LB
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383 www.cui.com
SPECIFICATIONS
parameter conditions/description min typ max units
directivity omnidirectional
sensitivity f= 1 KHz, 1Pa 0 dB= 1 V/Pa -41 -38 -35 dB
operating voltage 2 10 Vdc
output impedance f= 1 KHz, 1Pa 2.2 kΩ
sensitivity reduction f= 1 KHz, 1Pa Vs=2 V dc to 1.5 V dc -3 dBA
frequency 20 20,000 Hz
current consumption Vs=2 V dc RL=2.2 kΩ 0.5 mA
signal to noise ration f= 1 KHz, 1 Pa A weighted 58 dBA
operating temperature -30 80 °C
storage temperature -30 80 °C
dimensions ø4 x H1.5 mm
weight 0.36 g
material brass (Au plating)
terminal wire type
RoHS 2011/65/EU
dustproof/waterproof level IP67, IEC standard 529 edition 2.0 (1989)
Notes: 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
For more information, please visit the product page.
date
page
PART NUMBER: DESCRIPTION:
04/2015
2 of 4
ELECTRET CONDENSER
MICROPHONE
CME-1538-100LB
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383 www.cui.com
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FREQUENCY RESPONSE CURVE
MEASUREMENT CIRCUIT
For more information, please visit the product page.
date
page
PART NUMBER: DESCRIPTION:
04/2015
3 of 4
ELECTRET CONDENSER
MICROPHONE
CME-1538-100LB
20050 SW 112th Ave. Tualatin, Oregon 97062 phone 503.612.2300 fax 503.612.2383 www.cui.com
MECHANICAL CHARACTERISTICS
item test condition evaluation standard
soldering heat resistance Stripped wires are immersed in rosin for 5 seconds and then im-
mersed 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.
The sensitivity should be within
±3dB compared with the initial
measurement.
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.
ENVIRONMENT TEST
item test condition evaluation standard
high temperature test After being placed in a chamber at +80°C for 1 hour.
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.
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:
+80
к
+25к +25к
-30к
1hr 0.5hr 1hr 0.5hr 1hr 0.5hr 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
For more information, please visit the product page.
