SPM0408HE5H‐SB
Amplified “Mini” SiSonic™ Microphone Specification
With Enhanced RF Protection – Halogen Free
Knowles Acoustics
1151 Maplewood Drive
Itasca, IL 60143
Knowles Acoustics, a division of Knowles Electronics,
LLC.
Revision: B
1 of 10
SPM0408HE5H‐SB
1. DESCRIPTION AND APPLICATION
1.1 Description
Amplified “Mini” Surface Mount Silicon Microphone with
Enhanced RF Protection – Halogen Free
1.2 Application
Hand held consumer electronics
2. PART MARKING
2. PART MARKING
Identification Number Convention
S 1 2 3
4 5 6 7
S: Manufacturing Location
“S” – Knowles Electronics Suzhou
Suzhou, China
“No Alpha Character” – Knowles Electronics Itasca
Itasca, IL USA
“E” – Engineering Samples
Digits 1 – 7: Job Identification Number
3 TEMPERATURE RANGE
3. TEMPERATURE RANGE
3.1 Operating Temperature Range: ‐40°C to +100°C
3.2 Storage Temperature Range: ‐40°C to +100°C
Knowles Acoustics, a division of Knowles Electronics,
LLC.
Revision: B
2 of 10
SPM0408HE5H‐SB
4. ACOUSTIC & ELECTRICAL SPECIFICATIONS
Symbol
Directivity
Condition
Limits
Min.
Nom.
Max.
Unit
Omni‐directional
Sensitivity
S
@ 1kHz (0dB=1V/Pa)
‐25
‐22
‐19
dB
Output impedance
ZOUT
@ 1kHz (0dB=1V/Pa)
‐‐‐
‐‐‐
300
Ω
Current Consumption
IDSS
across 1.5 to 3.6 volts
‐‐‐
‐‐‐
350
μA
Signal to Noise Ratio
S/N
@ 1kHz (0dB=1V/Pa)
‐‐‐
59
‐‐‐
dB
Supply Voltage
Vs
1.5
‐‐‐
3.6
V
Sensitivity Loss across
Voltage
THD
Change in sensitivity over
3.6v to 1.5v
No Change Across Voltage
Range
At 100dB SPL, THD
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