BL-21994-000 Knowles Acoustics, BL-21994-000 Datasheet - Page 5

• 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

Ultra Mini Package - 3.76 x 2.95 x 1.10 (mm)
Thin Mini Package - 4.72 x 3.76 x 1.25 (mm)
Zero Height Mic
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Note: All performance curves are typical
SiSonic Zero Height Mic
Minimizes distance between PCB and mobile device housing
Ideal for microphone placement on reverse side of PCB, while maintaining acoustic port on top side of mobile device, for clamshell phone designs
Enables the thinnest, highest density product designs
M M o o d d e e l l
SPU0409HE5
SPU0409HD5
SPU0409HE5
SPU0409HD5
M M o o d d e e l l
SPM0204HE5
SPM0204HD5
SPM0208HE5
SPM0208HD5
SPM0205HD4
M M o o d d e e l l
SPM0204LE5
SPM0208LE5
Description
Amplified
Amplified
Standard
Standard
Description
Description
™
™
Amplified
Amplified
Amplified
Standard
Standard
shrinks product thickness by up to 30%
Standard
Digital
Thin Mini Package - 4.72 x 3.76 x 1.25 (mm)
•
•
•
•
•
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and built in amplifier
Thin Mini SiSonic with a footprint less than 18mm
manufacturing costs and brings greater design flexibility
Rugged, solid-state design process for stable acoustic
performance under extreme conditions such as temperature,
shock and vibration
Digital - Pulse Density Modulation (PDM) device available,
which has an integrated sleep mode and is compatible with
stereo input applications
New Ultra Mini with footprint of 11mm
Flexible designs available with/without RF filtering
Ideal for miniature consumer electronics
STANDARD MOUNT
Directivity
Omni
Omni
Omni
Omni
Directivity
Directivity
Omni
Omni
Omni
Omni
Omni
Omni
Omni
Supply Voltage
(min-max)
1.5 to 3.6v
1.5 to 3.6v
1.5 to 3.6v
1.5 to 3.6v
Supply Voltage
Supply Voltage
(min-max)
(min-max)
1.5 to 3.6v
1.5 to 3.6v
1.5 to 3.6v
1.5 to 3.6v
1.6 to 3.6v
1.5 to 3.6v
1.5 to 3.6v
www.knowles.com
2
ZERO HEIGHT MIC
RF Filtering
Enhanced
Enhanced
Standard
Standard
RF Filtering
RF Filtering
2
Enhanced
Enhanced
Enhanced
Enhanced
Standard
Standard
Standard
reduces
Sensitivity @1kHz
(dB re1V/1Pa)
™
-26.0 (1 Pa ref Full Scale)
-42.0
-42.0
-22.0
-22.0
Sensitivity @1kHz
Sensitivity @1kHz
(dB re1V/1Pa)
(dB re1V/1Pa)
MICROPHONES – MEMS
-10
-10
-20
-30
20
20
10
-5
-10
5
0
0
10
-5
5
0
-42.0
-42.0
-22.0
-22.0
-38.0
-18.0
100
100
100
2
2
2
Impedance
3
3
3
(Ohms)
Output
< 300
< 300
< 300
< 300
4
4
4
5 6 7 8 9
5 6 7 8 9
5 6 7 8 9
Impedance
Impedance
FREQUENCY (Hz)
FREQUENCY (Hz)
(Ohms)
(Ohms)
Output
Output
< 300
< 300
< 300
< 300
< 300
< 300
< 300
1k
1k
1k
FREQUENCY (Hz)
2
2
2
Drain (mA)
Maximum
Current
3
< 0.25
< 0.25
< 0.35
< 0.35
3
3
4 5 6 7 8 9
4
4
Drain (mA)
Drain (mA)
Maximum
Maximum
5 6 7
5 6 7
Current
Current
< 0.25
< 0.25
< 0.35
< 0.35
< 0.50
< 0.25
< 0.35
8k
10k
8k
5