SPM0408LE5H‐TB
“Mini” SiSonic™ Microphone
Amplified Zero Height 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 11 SPM0408LE5H‐TB
1. DESCRIPTION AND APPLICATION
1.1 Description
“Mini” Amplified Surface Mount Zero Height Silicon
Microphone with Enhanced RF Protection – Halogen Free
1.2 Application
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 11 SPM0408LE5H‐TB
4. ACOUSTIC & ELECTRICAL SPECIFICATIONS
Symbol
Directivity
Condition
Limits
Min.
Nom.
Max.
Unit
Omni‐directional
Sensitivity
S
@ 1kHz (0dB=1V/Pa)
‐21
‐18
‐15
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 < 1%
At 115dB SPL, THD = < 10%
dB
dB
5. FREQUENCY RESPONSE CURVE
Knowles Acoustics, a division of Knowles Electronics, LLC.
Revision: B 3 of 11 SPM0408LE5H‐TB
6. MECHANICAL SPECIFICATIONS
Knowles Acoustics, a division of Knowles Electronics, LLC.
Revision: B 4 of 11 SPM0408LE5H‐TB
7. RECOMMENDED CUSTOMER LAND PATTERN
8. RECOMMENDED SOLDER STENCIL PATTERN
N/A
Knowles Acoustics, a division of Knowles Electronics, LLC.
Revision: B 5 of 11 SPM0408LE5H‐TB
9. RECOMMENDED INTERFACE CIRCUIT
V+ Pin 6 = Vdd
Vout Pin 1 = Output R1 = 22kΩ
R2 = 2.4kΩ
Pins 3 4 5 7 8 = Ground
Pins 3, 4, 5, 7, 8 = Ground Pin 2 = Gain Control
Pin 2 = Gain Control R3 (set by customer) C1 (set by customer) Desired Gain
Termination Method
Unity Gain (0dB)
Tie Gain directly to Output. 20dB Gain
Tie Gain through C1 (0.47uF) to Ground.
Adjustable Gain
Add R3 and C1. Use formulas provided to calculate settings, or contact Knowles for support. Setting Gain Formulas: Gain of non‐inverting Op‐Amp is determined as:
{
(
)}
Gain(dB) = 20 * log(G)
( )
g( )
G=1+ {R1 / (R2 + R3)}
High‐pass‐filter Corner Frequency: C.F. = 1 / {2*π*(R2 + R3) * C1}
Knowles Acoustics, a division of Knowles Electronics, LLC.
Revision: B 6 of 11 SPM0408LE5H‐TB
10. PACKAGING DETAIL
10. PACKAGING DETAIL
Model Number
Model Number
Suffix
Reel Diameter
Quantity per Reel
SPM0408LE5H‐TB
‐2
7”
1,200
SPM0408LE5H‐TB
‐6
13”
4,800
Knowles Acoustics, a division of Knowles Electronics, LLC.
Revision: B 7 of 11 SPM0408LE5H‐TB
11. SOLDER REFLOW PROFILE
260°C
230°C
170–180°C
Pre‐heat
Solder Melt
120 sec
120 sec.
100 sec
100 sec.
Stage
Temperature Profile
Time (maximum)
Pre‐heat
170 ~ 180 C
120 sec.
Solder Melt
Above 230 C
100 sec.
Peak
260 C maximum
30 sec.
Notes:
1.
Do not pull a vacuum over the port hole of the microphone. Pulling a vacuum over the port hole can damage the device.
2.
Do not board wash after the reflow process. Board washing and cleaning Do not board wash
after the reflow process. Board washing and cleaning
agents can damage the device. Do not expose to ultrasonic processing or cleaning.
3.
Number of Reflow = recommend no more than 3 cycles. 12 ADDITIONAL NOTES
12. ADDITIONAL NOTES
(A)
(B)
Shelf life: Twelve (12) months when devices are to be stored in factory supplied, unopened ESD moisture sensitive bag under maximum environmental conditions of 30ºC, 70% R.H. MSL (moisture sensitivity level) Class 2a.
Knowles Acoustics, a division of Knowles Electronics, LLC.
Revision: B 8 of 11 SPM0408LE5H‐TB
13. RELIABILITY SPECIFICATIONS
Note: After test conditions are performed, the sensitivity of the microphone shall not deviate more than 3dB from its initial value. Test
Description
Thermal Shock
100 cycles of air‐air thermal shock from ‐40C to +125C with 15min soaks. (ICE 68‐2‐4)
High Temperature St
Storage
+105C environment for 1,000 hours. (IEC 68‐2‐2 Test Ba)
Low Temperature Storage
‐40C environment for 1,000 hours. (IEC 68‐2‐2 Test Aa)
High Temperature Bias
+105C environment while under bias for 1,000 hours. (IEC 68‐2‐2 Test Ba)
Low Temperature Bias
‐40C environment while under bias for 1,000 hours. (IEC 68‐2‐2 Test Aa)
Temperature / Humidity Bias
+85C/85% RH environment while under bias for 500 hours. (JESD22‐A101A‐B)
Vibration
4 cycles lasting 12 minutes from 20 to 2,000Hz in X, Y, and Z direction with a peak acceleration of 20g. (MIL 883E, Method 2007.2, A)
Electrostatic Discharge
3 discharges at +/‐ 8kV direct contact to the lid when unit is grounded (IEC 61000‐4‐2) and 3 discharges at +/‐ 2kV direct contact to the I/O pins (MIL 883E, Method 3015.7)
Reflow
5 reflow cycles with peak temperature of 260C.
Mechanical Shock
3 pulses of 10,000g in the X, Y, and Z direction. (IEC 68‐2‐
27, Test Ea)
Knowles Acoustics, a division of Knowles Electronics, LLC.
Revision: B 9 of 11 SPM0408LE5H‐TB
14. SPECIFICATION REVISIONS
Revision
Detailed Specification Changes
Date
A
Specification Release
01‐18‐2008
B
Updated to new format (B)
Updated to new format (B)
04‐03‐2009
04
03 2009
The information contained in this literature is based on our experience to date and is believed to be reliable and it is subject to change
without notice. It is intended as a guide for use by persons having technical skill at their own discretion and risk. We do not guarantee
favorable results or assume any liability in connection with its use. Dimensions contained herein are for reference purposes only. For
specific dimensional requirements consult factory. This publication is not to be taken as a license to operate under, or recommendation to
infringe any existing patents. This supersedes and voids all previous literature.
Knowles Acoustics, a division of Knowles Electronics, LLC.
Revision: B 10 of 11