BL-21994-000 Knowles Acoustics, BL-21994-000 Datasheet - Page 8

• Manufacturer Part Number: BL-21994-000
• Description: MIC ASSY PIEZO INSTR W/38" CABLE
• Manufacturer: Knowles Acoustics
• Series: BLr
• Type: Piezo Condenserr

Specifications of BL-21994-000

• Sensitivity: -69dB ±3dB
• Voltage - Rated: 3V
• Current: 160µA
• Size / Dimension: Circular - 12.7mm Dia x 25.4mm H
• Impedance: 4K Ohm
• Frequency: 20Hz ~ 10kHz
• Termination: Wire Leads
• Direction: Omnidirectional
• Port Location: Top
• Diameter: 12.7 mm
• Transducer Function: Microphone
• Device Type: Microphone
• Directivity: Omni
• External Diameter: 12.7mm
• Output Impedance: 4000ohm
• Length: 25.4mm
• Outer Diameter: 12.7mm
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Filter Type: -
• S/n Ratio: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 423-1002; BL-1994; BL-21994; BL1994

8
MICROPHONES – ECMs
Uni-Directional – 3 mm, 6 mm, 9.7 mm
Noise Canceling – 4 mm, 6 mm, 9.7 mm
Value Added Microphone Assemblies
Knowles Acoustics has over 60 years experience with precision assembly for demanding applications. By allowing Knowles to
work with your design engineers we are typically able to provide a lower overall cost (time to market, R&D expenses,
production scrap and inventory issues) with some of the highest quality standards in the industry.
•
•
•
Notes:
1. All sensitives are referenced at 1 kHz (1V/Pa)
2. Frequency graphs are typical. Contact manufacturer
Multiple value added models with cable wire leads and connectors along with rubber boot housings that all meet current RoHS standards are available
Outsource your existing assembly that contains a Knowles component, and maintain control of drawings and process
Meet Halogen Free and GREEN standards
for more detailed information.
-10
-20
-30
20
10
-10
-20
-30
20
10
0
0
0
0
100
100
2
2
0˚
3
3
3x1.5 FREQUENCY RESPONSE
4x1.5 FREQUENCY RESPONSE
4
4 5 6 7 8 9
Far 50cm
5 6 7 8 9
FREQUENCY (Hz)
FREQUENCY (Hz)
1k
1k
Near 6mm
2
Size (mm)
Size (mm)
2
4x1.5
6x2.2
9.7x5.2
3x1.5
6x2.2
6x2.7
6x5.2
9.7x5
3
3
4
4 5 6 7 8 9
180˚
5 6 7 8 9
Part Number
MB4015NSC-3
MB6022NSC-2
MD9752NSZ-1
Part Number
MB3015USB-3
MB3015USB-4
MB6022USC-3
MB6022USC-3P
MB6027USC-3
MB6052USZ-2
MB9750USB-4
10k
10k
-10
-20
-30
20
10
-10
-20
-30
-40
10
0
0
0
100
100
Sensitivity (db)
Sensitivity (db) Filter
www.knowles.com
-47.0±3
-49.0±3
-47.0±3
-47.0±3
-47.0±3
-44.0±3
-47.0±4
-46.0±3
-44.0±3
-40.0±3
2
2
6x2.2, 6x2.7, 6x5.2 FREQUENCY RESPONSE
3
3
6x2.2 FREQUENCY RESPONSE
4
4 5 6 7 8 9
5 6 7 8 9
FREQUENCY (Hz)
10pF & 33pF
10pF & 33pF
None
FREQUENCY (Hz)
33pF
33pF
10pF & 33pF
10pF & 33pF
10pF & 33pF
Filter
None
33pF
1k
1k
Near-Field
Far-Field
180˚
0˚
2
2
3
3
Termination
Solder Type
Solder Type
Solder Type
Solder Type
Solder Type
Solder Type
Solder Type
Termination
Solder Type
Solder Type
Solder Type
4
4 5 6 7 8 9
5 6 7 8 9
10k
10k
-10
-20
-30
-40
-10
-20
-30
10
20
10
0
0
100
100
180˚
2
2
0˚
3
3
9.7x5.2 FREQUENCY RESPONSE
9.7x5.0 FREQUENCY RESPONSE
4
4
Far-Field
5 6 7 8 9
5 6 7 8 9
FREQUENCY (Hz)
FREQUENCY (Hz)
1k
1k
Near-Field
2
2
3
3
4
4
5 6 7 8 9
5 6 7 8 9
10k
10k