BL-21785-000 Knowles Acoustics, BL-21785-000 Datasheet - Page 3
![MIC ELEMENT PIEZO INSTRUMENT](/photos/0/4/490/bl-21785_sml.jpg)
BL-21785-000
Manufacturer Part Number
BL-21785-000
Description
MIC ELEMENT PIEZO INSTRUMENT
Manufacturer
Knowles Acoustics
Series
BLr
Type
Piezo Condenserr
Specifications of BL-21785-000
Sensitivity
-69dB ±3dB
Voltage - Rated
1.3V
Current
160µA
Size / Dimension
Rectangular - 7.87mm L x 5.54mm W x 2.24mm H
Impedance
4K Ohm
Frequency
20Hz ~ 10kHz
Termination
Solder Pads
Direction
Omnidirectional
Port Location
Side
Directional Properties
Omnidirectional
Operating Voltage
3 V
Dimensions
7.87 mm L x 5.54 mm W x 2.24 mm D
Depth
2.24 mm
Length
7.87 mm
Width
5.54 mm
Transducer Function
Microphone
Device Type
Microphone
Directivity
Omni
External Diameter
1.41mm
Output Impedance
4000ohm
Drain Current Max
160µA
Outer Diameter
1.41mm
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Filter Type
-
S/n Ratio
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
423-1003
BL-1785
BL-21785
BL1785
BL-1785
BL-21785
BL1785
We can help you
every step of the way.
It all starts with your application. Or it starts with an idea you may
have. For support from concept to design to sub-assembly, or any step
along the way, just call us. Or visit us at www.knowles.com
www.knowles.com
Table of Contents
MICROPHONES - MEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
MICROPHONES - ECMs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
SPECIALTY TRANSDUCERS - MICROPHONES . . . . . . . . . . . . . . . . 9-14
ACCELEROMETERS & DAMPERS . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SPECIALTY TRANSDUCERS - SPEAKERS . . . . . . . . . . . . . . . . . . 15-23
CUSTOM ASSEMBLIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
ACOUSTIC SOFTWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
MICROPHONE AND SPEAKER BASICS . . . . . . . . . . . . . . . . . . . . 26-27
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