BL-21785-000 Knowles Acoustics, BL-21785-000 Datasheet - Page 3

• 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

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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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