BL-21994-000 Knowles Acoustics, BL-21994-000 Datasheet - Page 7

• 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

Omni-Directional – 6 mm
Omni-Directional – 9.7 mm
Notes:
1. All sensitives are referenced at 1 kHz (1V/Pa)
2. Frequency graphs are typical. Contact manufacturer
for more detailed information.
Size (mm)
9.7x4.5
Size (mm)
6X1.3
6x1.5
6x2.2
6x2.7
6X5.2
-10
-20
-30
-10
-20
-30
20
10
-10
-20
-30
20
10
20
10
0
0
0
100
100
100
2
2
2
Part Number
MD9745APA-1
MD9745APZ-F
3
3
3
9.7x4.5 FREQUENCY RESPONSE
6x1.3 FREQUENCY RESPONSE
6x2.2 FREQUENCY RESPONSE
4
4
4
Part Number
MB6013ASC-1
MB6015ASC-1
MB6022ASC-1L
MB6022APC-0
MB6022ABC-3
MB6027ASC-1L
MB6052ASC-1
5 6 7 8 9
5 6 7 8 9
5 6 7 8 9
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
www.knowles.com
1k
1k
1k
Sensitivity (db)
-41.0±3
-42.0±2
2
2
2
Sensitivity (db)
3
3
3
-42.0±3
-42.0±3
-40.0±3
-40.0±3
-45.0±2
-42.0±3
-42.0±3
4
4
4
5 6 7 8 9
5 6 7 8 9
5 6 7 8 9
Filter
10pF
None
10k
10k
10k
10pF & 33pF
10pF & 33pF
10pF & 33pF
10pF & 33pF
10pF & 33pF
10pF & 33pF
10pF & 33pF
Filter
Termination
Pin Type
Pin Type
MICROPHONES – ECMs
-10
-20
-30
20
10
0
-10
-20
-30
20
10
0
100
100
PCB, Bullseye
Termination
Solder Type
Solder Type
Solder Type
Solder Type
Solder Type
Pin Type
2
2
3
3
6x1.5 FREQUENCY RESPONSE
6x2.7 FREQUENCY RESPONSE
4
4
5 6 7 8 9
5 6 7 8 9
FREQUENCY (Hz)
FREQUENCY (Hz)
1k
1k
2
2
3
3
4
4
5 6 7 8 9
5 6 7 8 9
10k
10k
7