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

4
MICROPHONES – MEMS
SiSonic
The SiSonic
shipments exceeding 400 million units to date. The proven and evolving design series continues to
support high-performance, high-density innovation in such applications as cell phones, digital still
cameras, portable music players, premium earbuds and other portable electronic devices.
Design variables include ever-smaller sizes, lower profiles and mounting options, increased output
capacities, and new digital audio options that eliminate analog noise. For manufacturers, surface
mount designs eliminate off-line subassembly production costs. Customized designs are supplied on
tape-and-reel and can be run through standard automatic pick-n-place equipment during in-line
surface mount manufacturing.
The microphones can also be integrated with our patented IntelliSonic
a precisely customized sound.
•
•
•
•
•
Part Numbering
Ultrasonic Acoustic Sensor
Derived from our industry-leading MEMS silicon surface mount microphone technology,
our new ultrasonic sensor designs function on a high frequency band. Sensor designs
are possible across a wide spectrum of applications requiring highly miniaturized
solutions for sensing and actuation/signaling.
New digital mics eliminate analog noise
New integrated designs with differential or switchable gain
Zero Height Mic
Original "mini" with footprint less than 18mm
RF Hardened products eliminate GSM/TDMA burst noise
in handset designs
M M o o d d e e l l
SPM0204UD5
™
SPU: Ultra (3.76x2.95)
SPM: Mini (4.72x3.76)
Product Description
™
MEMS Microphones
MEMS microphone series is entering its fourth generation of development, with product
™
for thinnest ever designs
Description
1
UAS
•
•
•
High frequency functionality
Wide range of applications
Micro-sized sensing and actuation
0204: Standard
0205: Digital
0206: Differential
0207: Switchable
0208: Amplified
0408: Amplified
0409: Standard
Directivity
Omni
Series
2
2
SPM0204HE3-PB-6
Supply Voltage
1
(min-max)
1.5 to 3.6v
Port Hole Type
H: Standard
L:ZHS
3
www.knowles.com
2
Frequency Range
10k-65k Hz
E: Enhanced
D: Standard
RF Filter
3
™
4
software and special porting designs to provide
4 5
Sensitivity @1kHz
Supply Voltage
(dB re1V/1Pa)
3: 1.5-5.5V
5: 1.5-3.6V
6
-47.0
5
-10
-20
-30
30
20
10
0
7
10k
Knowles Internal
Reference Only
Version
Impedance
20k
6
(Ohms)
Output
< 300
30k
Packaging QTY
FREQUENCY (Hz)
(7” or 13” Reel)
2: 1200
3: 4500
6: 4800
T: 300 (7" Only)
Drain (mA)
Maximum
40k
7
Current
< 0.25
50k
60k