SPK1638LM4H-B

SPK1638LM4H-B
Low Noise Digital Zero-Height
SiSonicTM Microphone
The SPK1638LM4H-B is a miniature, highperformance, low power, bottom port
silicon digital microphone with a single bit
PDM output. Using Knowles’ proven high
performance SiSonicTM MEMS technology,
the SPK1638LM4H-B consists of an acoustic
sensor, a low noise input buffer, and a
sigma-delta modulator. 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.
Revision: A
Sheet 1 of 13
Features:
 Low Noise
 High Drive Capability
 Low Current
 Flat Frequency Response
 RF Shielded
 Zero-Height MicTM
 PDM Output
 Supports Dual Multiplexed Channels
 Ultra-Stable Performance
 Standard SMD Reflow
 Omnidirectional
1/13/2014
©2014 Knowles Electronics
SPK1638LM4H-B
1.
ABSOLUTE MAXIMUM RATINGS
Parameter
Absolute Maximum Rating
Units
VDD, DATA to Ground
-0.3, +5.0
V
CLOCK to Ground
-0.3, +5.0
V
SELECT to Ground
-0.3, +5.0
V
±5
mA
Indefinite to Ground or VDD
sec
-40 to +100
°C
Input Current
Short Circuit Current to/from DATA
Temperature Range
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=1.8 V, FCLOCK=2.4 MHz, SELECT pin grounded, no load,
unless otherwise indicated
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Supply Voltage1
VDD
1.6
-
3.6
V
1,2,3
IDD
-
460
650
µA
Supply Current
Sleep Current3
Sensitivity
1
Signal to Noise Ratio
Total Harmonic
Distortion
Acoustic Overload
Point
Power Supply
Rejection Ratio
Power Supply
Rejection
ISLEEP
FCLOCK < 1 kHz
-
6
11
µA
S
94 dB SPL @ 1 kHz
-29
-26
-23
dBFS
SNR
94 dB SPL @ 1 kHz, A-weighted
-
64.5
-
dB(A)
THD
94 dB SPL @ 1 kHz, S = Typ
-
0.5
-
%
AOP
10% THD @ 1 kHz, S = Typ
-
122
-
dB SPL
PSRR
200 mVpp sinewave @ 1 kHz
-
52
-
PSR
100 mVpp square wave
@ 217 Hz, A-weighted
-
84
-
Fullscale = ±100
-
-4
-
DC Output
Directivity
Increasing sound pressure
Increasing density of 1’s
Data Format
Revision: A
Sheet 2 of 13
% FS
Omnidirectional
Polarity
Logic Input High
dBV
/FS
dBFS
(A)
½ Cycle PDM
VIH
0.65xVDD
-
3.6
V
1/13/2014
©2014 Knowles Electronics
SPK1638LM4H-B
Parameter
Symbol
Conditions
Min
Typ
Max
Units
-0.3
-
0.35xVDD
V
Logic Input Low
VIL
Logic Output High
VOH
IOUT = 2 mA
0.7xVDD
-
VDD
V
Logic Output Low
VOL
IOUT = 2 mA
0
-
0.3xVDD
V
SELECT (high)
VDD -0.2
-
3.6
V
SELECT (low)
-0.3
-
0.2
V
2
-
10
mA
Short Circuit Current
ISC
Grounded DATA pin
Output Load
CLOAD
-
-
160
pF
Clock Frequency
FCLOCK
1.0
-
3.25
MHz
40
-
60
%
-
-
13
ns
Clock Duty Cycle
Clock Rise/Fall Time
FCLOCK < 1 kHz
-
-
10
ms
4,6
FCLOCK ≥ 1 MHz
-
-
20
ms
18
-
115
ns
0
-
16
ns
Fall-asleep Time
Wake-up Time
tEDGE
4,5
Delay Time for Valid
Data
tDV
Delay Time for High Z
tDZ
No load for min tDV
Max CLOAD for max tDV
1
100% tested.
IDD varies with CLOAD according to: ΔIDD = 0.5*VDD*ΔCLOAD*FCLOCK.
3
Maximum specifications are measured at maximum VDD. Typical specifications are measured at standard test
conditions.
4
Valid microphones states are: Powered Down Mode (mic off), Sleep Mode (low current, DATA = high-Z, fast startup),
and Active Mode (normal operation).
5
Time from FCLOCK < 1 kHz to ISLEEP specification is met when transitioning from Active Mode to Sleep Mode.
6
Time from FCLOCK ≥ 1 MHz to all applicable specifications are met when transitioning from Sleep Mode to Active Mode.
2
Revision: A
Sheet 3 of 13
1/13/2014
©2014 Knowles Electronics
SPK1638LM4H-B
3.
MICROPHONE STATE DIAGRAM
Active
Mode
Powered
Down
Mode
Revision: A
Sheet 4 of 13
Sleep
Mode
1/13/2014
©2014 Knowles Electronics
SPK1638LM4H-B
4.
FREQUENCY RESPONSE CURVE
Sensitivity (dB)
Typical Free Field Response
Normalized to 1 kHz
20
18
16
14
12
10
8
6
4
2
0
-2
-4
-6
-8
-10
-12
-14
-16
-18
-20
100
1,000
10,000
Frequency (Hz)
Revision: A
Sheet 5 of 13
1/13/2014
©2014 Knowles Electronics
SPK1638LM4H-B
5.
INTERFACE CIRCUIT
VDD
VDD
.1f
.1f
SELECT
SELECT
Mic
(High)
Mic
(Low)
DATA CLOCK
Microphone
SELECT
Asserts DATA On
Latch DATA On
Mic (High)
VDD
Rising Clock Edge
Falling Clock Edge
Mic (Low)
GND
Falling Clock Edge
Rising Clock Edge
Note: 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.
6.
TIMING DIAGRAM
1/FCLOCK
VIH
CLOCK
tEDGE
tEDGE
VIL
tDV
DATA
(SELECT = VDD)
tSETUP
VOH
Mic (High)
Data
VOL
Revision: A
Sheet 6 of 13
High Z
tDV
tDZ
DATA
(SELECT = GND)
tDZ
High Z
tSETUP
VOH
Mic (Low)
Data
VOL
1/13/2014
©2014 Knowles Electronics
SPK1638LM4H-B
7.
MECHANICAL SPECIFICATIONS
Item
Dimension
Tolerance
Length (L)
4.00
±0.10
Width (W)
3.00
±0.10
Height (H)
1.00
±0.10
Ø0.25
±0.05
Acoustic Port (AP)
Pin #
Pin Name
Type
Description
1
VDD
Power
Power Supply
2
DATA
Digital O
PDM Output
3
CLOCK
Digital I
Clock Input
4
SELECT
Non-Digital
Input
Lo/Hi (L/R) Select
This pin is internally pulled low.
5
GROUND
Power
Ground
Notes: Pick Area only extends to 0.25 mm of any edge or hole unless otherwise specified.
Dimensions are in millimeters unless otherwise specified.
Tolerance is ±0.15mm unless otherwise specified
Revision: A
Sheet 7 of 13
1/13/2014
©2014 Knowles Electronics
SPK1638LM4H-B
8.
EXAMPLE LAND PATTERN
9.
EXAMPLE SOLDER STENCIL PATTERN
Notes: Dimensions are in millimeters unless otherwise specified.
Detailed information on AP size considerations can be found in the latest SiSonicTM
Design Guide application note.
Further optimizations based on application should be performed.
Revision: A
Sheet 8 of 13
1/13/2014
©2014 Knowles Electronics
SPK1638LM4H-B
10. PACKAGING & MARKING DETAIL
Model Number
Suffix
Reel Diameter
Quantity Per Reel
SPK1638LM4H-B
-7
13”
5,700
Alpha Character A:
“S”: Knowles SiSonicTM Production
“E”: Knowles Engineering Samples
“P”: Knowles Prototype Samples
“JIN NUMBER”:
Unique Job Identification Number
for product traceability
Pin 1
Notes: Dimensions are in millimeters unless otherwise specified.
Vacuum pickup only in the pick area indicated in Mechanical Specifications.
Tape & reel per EIA-481.
Labels applied directly to reel and external package.
Shelf life: Twelve (12) months when devices are to be stored in factory supplied,
unopened ESD moisture sensitive bag under maximum environmental conditions of
30°C, 70% R.H.
Revision: A
Sheet 9 of 13
1/13/2014
©2014 Knowles Electronics
SPK1638LM4H-B
11. RECOMMENDED REFLOW PROFILE
tP
TP
Ramp-up
Temperature
TL
tL
TSMAX
TSMIN
tS Preheat
Ramp-down
25°C
Time
Time 25°C to Peak
Profile Feature
Average Ramp-up rate (TSMAX to TP)
Preheat
 Temperature Min (TSMIN)
 Temperature Max (TSMAX)
 Time (TSMIN to TSMAX) (tS)
Time maintained above:
 Temperature (TL)
 Time (tL)
Peak Temperature (TP)
Time within 5°C of actual Peak Temperature (tP)
Ramp-down rate (TP to TSMAX)
Time 25°C to Peak Temperature
Pb-Free
3°C/second max.
150°C
200°C
60-180 seconds
217°C
60-150 seconds
260°C
20-40 seconds
6°C/second max
8 minutes max
Notes: Based on IPC/JDEC J-STD-020 Revision C.
All temperatures refer to topside of the package, measured on the package body
surface.
Revision: A
Sheet 10 of 13
1/13/2014
©2014 Knowles Electronics
SPK1638LM4H-B
12. ADDITIONAL NOTES
(A) MSL (moisture sensitivity level) Class 1.
(B) Maximum of 3 reflow cycles is recommended.
(C) In order to minimize device damage:
 Do not board wash or clean after the reflow process.
 Do not brush board with or without solvents after the reflow process.
 Do not directly expose to ultrasonic processing, welding, or cleaning.
 Do not insert any object in port hole of device at any time.
 Do not apply over 30 psi of air pressure into the port hole.
 Do not pull a vacuum over port hole of the microphone.
 Do not apply a vacuum when repacking into sealed bags at a rate faster than 0.5 atm/sec.
13. MATERIALS STATEMENT
Meets the requirements of the European RoHS directive 2011/65/EC as amended.
Meets the requirements of the industry standard IEC 61249-2-21:2003 for halogenated
substances and Knowles Green Materials Standards Policy section on Halogen-Free.
Ozone depleting substances are not used in the product or the processes used to make the
product, including compounds listed in Annex A, B, and C of the “Montreal Protocol on
Substances That Deplete the Ozone Layer.”
Revision: A
Sheet 11 of 13
1/13/2014
©2014 Knowles Electronics
SPK1638LM4H-B
14. RELIABILITY SPECIFICATIONS
Test
Description
Thermal Shock
100 cycles air-to-air thermal shock from -40oC to +125oC with 15
minute soaks. (IEC 68-2-4)
High Temperature Storage
1,000 hours at +105oC environment (IEC 68-2-2 Test Ba)
Low Temperature Storage
1,000 hours at -40oC environment (IEC 68-2-2 Test Aa)
High Temperature Bias
1,000 hours at +105oC under bias (IEC 68-2-2 Test Ba)
Low Temperature Bias
1,000 hours at -40oC under bias (IEC 68-2-2 Test Aa)
Temperature / Humidity Bias
1,000 hours at +85oC/85% R.H. under bias. (JESD22-A101A-B)
Vibration
ESD-HBM
ESD-LID/GND
ESD-MM
4 cycles of 20 to 2,000 Hz sinusoidal sweep with 20 G peak
acceleration lasting 12 minutes in X, Y, and Z directions.
(Mil-Std-883E, Method 2007.2 A)
3 discharges of ±2 kV direct contact to I/O pins.
(MIL 883E, Method 3015.7)
3 discharges of ±8 kV direct contact to lid while unit is grounded.
(IEC 61000-4-2)
3 discharges of ±200 V direct contact to I/O pins.
(ESD STM5.2)
Reflow
5 reflow cycles with peak temperature of +260oC
Mechanical Shock
3 pulses of 10,000 G in the X, Y, and Z direction (IEC 68-2-27, Test Ea)
Note: After reliability tests are performed, the sensitivity of the microphones shall not deviate
more than 3 dB from its initial value.
Revision: A
Sheet 12 of 13
1/13/2014
©2014 Knowles Electronics
SPK1638LM4H-B
16. SPECIFICATION REVISIONS
Revision
A
Specification Changes
Initial Release (C10115490)
Date
1/13/14
Information contained herein is subject to change without notice. It may be used by a party at their own discretion
and risk. We do not guarantee any results or assume any liability in connection with its use. This publication is not
to be taken as a license to operate under any existing patents.
Revision: A
Sheet 13 of 13
1/13/2014
©2014 Knowles Electronics