date 08/05/2022

page 1 of 4

MODEL: CMB-6544PF | DESCRIPTION: ELECTRET CONDENSER MICROPHONE

cuidevices.com

SPECIFICATIONS

parameter

conditions/description

min

typ

max

units

directivity

omnidirectional

sensitivity (S)

f = 1 kHz, 1 Pa, 0 dB = 1 V/1 Pa

-47

-44

-41

dB

operating voltage

4.5

10

Vdc

output impedance (Zout)

f = 1 kHz, 1 Pa

1

KΩ

sensitivity reduction (∆S-Vs)

f = 1 kHz, 1 Pa, Vs = 4.5 ~ 1.5 Vdc

-3

dB

frequency (f)

20

20,000

Hz

current consumption (LDSS)

Vs = 4.5 Vdc, RL = 1 KΩ

0.5

mA

signal to noise ratio (S/N)

f = 1 kHz, 1 Pa, A-weighted

60

dBA

operating temperature

-40

70

°C

storage temperature

-40

70

°C

dimension

ø9.4 x 6.5 mm

weight

0.7

g

material

AL

terminal

pin type (hand soldering only)

RoHS

yes

note:

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)

2.54 0.3

terminal 2

terminal 1

1.5±0.2

5.0

(2 PLCS)

6.50.2

1.0

0.2

9.4

0.4 0.1

(2 PLCS)

MECHANICAL DRAWING

FET Impedance

converter

Term.1 C=1 F

RL

Output

+Vs

E.C.M

unit

Shield Case Term.2

-Ground

MEASUREMENT CIRCUIT

unit: mm

RL = 1.0 KΩ

Schematic Diagram

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