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SPUL409HE5H-PB
SiSonicTM Microphone With Enhanced RF Protection
The SPUL409HE5H-PB is a miniature, highperformance, low power, top port silicon microphone. Using Knowles’ proven high performance SiSonicTM MEMS technology, the SPUL409HE5H-PB consists of an acoustic sensor, a low noise input buffer, and an output amplifier. These devices are suitable for applications such as cellphones, smart phones, laptop computers, sensors, digital still cameras, portable music recorders, and other portable electronic devices where excellent wideband audio performance and RF immunity are required.
Features: Enhanced RF protection Small package Ultra-Stable Performance Standard SMD Reflow Omnidirectional
Revision: I Sheet 1 of 11
3/27/2013 ©2013 Knowles Electronics
SPUL409HE5H-PB
1. ABSOLUTE MAXIMUM RATINGS
Parameter VDD to Ground OUT to Ground
Input Current to Any Pin Temperature Range
Absolute Maximum Rating -0.5, +5.0
-0.3, VDD + 0.3 ±5
-40 to +100
Units V V mA °C
Stresses exceeding these “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only. Functional operation at these or any other conditions beyond those indicated under “Acoustic & Electrical Specifications” is not implied. Exposure beyond those indicated under “Acoustic & Electrical Specifications” for extended periods may affect device reliability.
2. ACOUSTIC & ELECTRICAL SPECIFICATIONS
TEST CONDITIONS: 23 ±2°C, 55±20% R.H., VDD(min) < VDD < VDD(max), no load, unless otherwise indicated
Parameter
Symbol
Conditions
Min Typ Max Units
Supply Voltage1 VDD
1.5 - 3.6
V
Supply Current1,2 IDD
- 145 190 µA
Sensitivity1
S
94 dB SPL @ 1 kHz
-45 -42 -39 dBV/Pa
Signal to Noise Ratio Total Harmonic Distortion
Acoustic Overload Point
DC Output
Output Impedance
Directivity
SNR THD AOP
ZOUT
94 dB SPL @ 1 kHz, A-weighted
94 dB SPL @ 1 kHz, S = Typ, Rload > 2 k 10% THD @ 1 kHz, S = Typ, VDD = 3.6V, Rload > 2 k
VDD = 1.5V
@ 1 kHz
- 59 - dB(A) --1 %
115 -
- dB SPL
- 0.84 -
V
-
- 300
Omnidirectional
Polarity
Increasing sound pressure
Decreasing output voltage
1 100% tested. 2 Maximum specifications are measured at maximum VDD. Typical specifications are measured at VDD = 1.8V.
Revision: I Sheet 2 of 11
3/27/2013 ©2013 Knowles Electronics
SPUL409HE5H-PB
3. FREQUENCY RESPONSE CURVE
Sensitivity (dB)
20 18 16 14 12 10
8 6 4 2 0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20
100
Typical Free Field Response Normalized to 1 kHz
1,000
Frequency (Hz)
10,000
Revision: I Sheet 3 of 11
3/27/2013 ©2013 Knowles Electronics
SPUL409HE5H-PB
4. INTERFACE CIRCUIT
VDD .1f VDD
OUTPUT
RS
RF
Dotted Section
Represents SiSonicTM
Microphone
GROUND
VREF
External Gain = -RF/RS (Set By User)
Note: All Ground pins must be connected to ground.
Capacitors near the microphone should not contain Class 2 dielectrics.
Detailed information on acoustic, mechanical, and system integration can be found in the latest SiSonicTM Design Guide application note..