BL-21994-000 Knowles Acoustics, BL-21994-000 Datasheet - Page 4

• 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

F requency R esponse
BL-1785
M odel C hart
Model
BL-1670
BL-1671
BL-1681
BL-1994
BL-3497
AMERICAS:
Knowles Acoustics
1151 Maplewood Drive
Itasca, IL 60143 U.S.A.
Phone: [phone]
Fax: [phone]
-35
-35
-40
-40
-45
-45
-50
-50
-55
-55
-60
-60
-65
-65
-70
-70
-75
-75
BL Series Microphone Specifications
Thick Case OKn
Thick Case 12S
Thin Case 12S
Thin Case 12S
Cylinder w/cable
Cylinder w/leads
2
Response
Drawing
(Legend)
Outline
EUROPE:
Knowles Acoustics
York Road, Burgess Hill
West Sussex, RT15 9TT
England
Phone: [phone]
Fax: [phone]
+
3
4
5
6 7 8 9
JAPAN:
Knowles Acoustics
Kyodo Bloom Building
19-1 Miyasaka 2-Chome
Setagaya-Ku, Tokyo 156, Japan
Phone: [phone]
Fax: [phone]
Source Follower
Source Follower
Source Follower
Standard
Standard
Standard
100
100
Circuit
Test
www . knowlesacoustics . com
2
ASIA:
Knowles Acoustics
5F, No. 129, Lane 235, Bauchiau Rd
Shindian City, Taipei 231, Taiwan
Republic of China
Phone: [phone]
Fax: [phone]
DC Supply
Voltage
3
1.3
1.3
1.3
FREQUENCY IN HERTZ
FREQUENCY IN HERTZ
3
3
3
4
5
6 7 8 9
Output Impedance (ohms)
Min.
8000
8000
8000
--
--
--
1000
1000
The information contained in this literature is based on our experience to date and is believed to
be reliable and subject to change without notice. It is intended as a guide for use by persons having
technical skill at their own discretion and risk. We do not guarantee favorable results or assume
any liability in connection with its use. Dimensions contained herein are for reference purposes only.
For specific dimensional requirements consult factory. This publication is not to be taken as a
license to operate under, or recommendation to infringe any existing patents. This supersedes and
voids all previous literature.
13000
13000
13000
Nom.
4000
4000
4000
22000
22000
22000
Max.
2
--
--
--
3
(µA max.)
Amplifer
4
Current
Drain
160
160
160
50
50
50
5
6 7 8 9
equivalten SPL)
"A" Weighted
Noise (1kHz
dB SPL max
10000
10000
32
32
34
34
34
34
page 4