CM-28431-000 Knowles Acoustics, CM-28431-000 Datasheet - Page 6

• Manufacturer Part Number: CM-28431-000
• Description: SPEAKER W/FLEX TABS LP Z=30
• Manufacturer: Knowles Acoustics
• Series: CMr
• Type: Magnetic, Balanced Armature, Face Portr

Specifications of CM-28431-000

• Impedance: 30 Ohm
• Size / Dimension: 16.54mm Dia x 8.26mm H
• Termination: Flex Contacts
• Shape: Round
• Transducer Function: Speaker
• Resonant Frequency: 1kHz
• External Diameter: 16.64mm
• External Width: 16.64mm
• Sound Level Spl: 119dB
• Outer Diameter: 16.64mm
• Sensitivity, Db: 103dB
• Rohs Compliant: Yes
• Sensitivity (db): 103dB
• External Depth: 8.38mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Rated: -
• Power - Max: -
• Frequency Range: -
• Sound Pressure Level: -
• Material - Cone: -
• Material - Magnet: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 423-1037; CM-28431; CM-8431; CM8431

6
Part Number System and Ordering Information
MICROPHONES – ECMs
Electret Condenser Microphones
Electret Condenser Microphones (ECM) are for general use in all electronic products requiring
a microphone. ECMs provide good acoustic performance and reliability under non-severe
environmental conditions.
•
•
•
•
•
•
Omni-Directional – 3 mm
Omni-Directional – 4 mm
Notes:
1. All sensitives are referenced at 1 kHz (1V/Pa)
2. Frequency graphs are typical. Contact manufacturer
corded and cordless phones, PDAs, notebooks, and mobile phones
Highly efficient electrical specifications
Industry standard sizes
Omni, Uni, and Noise Canceling Directivities
Integrated capacitors for RF filtering
Multiple terminations - Solderless, Pin Type, and Solder Pad
Used in a wide variety of applications, including wired and wireless headsets,
for more detailed information.
MB3 0 1 5 A S C-1
-10
-20
-30
Size (mm)
3x1.5
Size (mm)
4x1.5
20
10
-10
-20
-30
-10
-20
-30
20
10
0
20
10
100
0
0
100
100
2
2
3
3
3x1.5 FREQUENCY RESPONSE
4x1.5 FREQUENCY RESPONSE
Part Number
MB3015ASC-1
MB3015ASC-2
Part Number
MB4015ASC-1L
4
4
5 6 7 8 9
5 6 7 8 9
FREQUENCY (Hz)
FREQUENCY (Hz)
15 - Height of Microphone in mm (1.5)
30 - Diameter of Microphone in mm (3.0)
M - Electret Type Microphone
1 - ECM Sensitivity Level
C - Capacitor Configuration: A=10pF, B=33pF, C=33&10pF, Z=None
S - Terminal connection: B=PCB, P=Pin, S=Solder
A - Directivity: A=Omnidirectional, U=Uni-Directional, N=Noise Canceling, P=Preamplified
B - Charged Backplate, D=Charged Diaphram
1k
1k
www.knowles.com
2
2
Sensitivity (db)
Sensitivity (db)
3
3
-42.0±3
-44.0±3
-42.0±3
4
4
5 6 7 8 9
5 6 7 8 9
10k
10k
Filter
10pF & 33pF
10pF & 33pF
Filter
10pF & 33pF
Termination
Solder Type
Solder Type
Termination
Solder Type