SPH1668LM4H-1 Datasheet

Knowles

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Datasheet

Revision: A 03/04/2015
Sheet 1 of 14 ©2014 Knowles Electronics
SPH1668LM4H-1
Digital Zero-Height SiSonicTM Microphone
With Multiple Performance Modes
The SPH1668LM4H-1 is a miniature, high-
performance, low power, bottom port
silicon digital microphone with a single bit
PDM output. Using Knowles’ proven high
performance SiSonicTM MEMS technology,
the SPH1668LM4H-1 consists of an acoustic
sensor, a low noise input buffer, and a high
performance 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. In addition, the
SPH1668LM4H-1 offers multiple
performance modes
Features:
Low Distortion of 1.6% at 120dBSPL
High SNR of 65.5dB
Low Current Consumption of 230uA in
Low-Power Mode
Flat Frequency Response
RF Shielded
Zero-Height MicTM
Supports Dual Multiplexed Channels
Standard SMD Reflow
Omnidirectional
Multiple performance modes (Sleep,
Low-Power, Performance)
Sensitivity Matching
Small Size
Revision: A 03/04/2015
Sheet 2 of 14 ©2014 Knowles Electronics
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
Input Current
±5
mA
Short Circuit Current to/from DATA
Indefinite to Ground or VDD
sec
Temperature Range
-40 to +100
°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=1.8 V, fCLOCK=2.4 MHz, SELECT pin grounded, no load, unless
otherwise indicated
General Microphone Specifications
Parameter
Symbol
Conditions
Typ
Max
Units
Supply Voltage
VDD
-
3.6
V
Clock
Frequency
Range
Sleep Mode
250
KHz
Low-Power Mode
815
KHz
Performance
Mode
2.475
MHz
4.8
Sleep Current1,3
ISLEEP
fCLOCK 250 kHz
100
µA
DC Output
Fullscale = ±100
0
-
% FS
Directivity
Omnidirectional
Polarity
Increasing sound
pressure
Increasing density of 1’s
Data Format
½ Cycle PDM
Short Circuit Current
ISC
Grounded DATA pin
-
20
mA
Output Load
CLOAD
-
140
pF
Fall-asleep Time4,5
fCLOCK 250 KHz
-
50
ms
Wake-up Time4,6
fCLOCK = 2.4 MHz
-
100
ms
Power-up Time4
VDD V(min)
-
100
ms
Mode-Change Time4
-
10
ms
Revision: A 03/04/2015
Sheet 3 of 14 ©2014 Knowles Electronics
Performance Mode
TEST CONDITIONS: fCLOCK = 2.4 MHz, VDD=1.8 V, unless otherwise indicated
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Supply Current1,2,3
IDD
-
626
700
µA
Sensitivity1
S
94 dB SPL @ 1 kHz
-30
-29
-28
dBFS
Signal to Noise Ratio
SNR
94 dB SPL @ 1 kHz, A-
weighted, fCLOCK=3.072 MHz
-
65.5
-
dB(A)
Total Harmonic Distortion
THD
94 dB SPL @ 1 kHz
-
0.1
-
%
120 dB SPL @ 1 kHz
-
1.6
-
Acoustic Overload Point
AOP
10% THD @ 1 kHz
-
122
-
dB SPL
Power Supply Rejection Ratio
PSRR
200 mVpp sinewave @ 1 kHz
-
64
-
dBV/FS
Power Supply Rejection
PSR+N
100 mVpp 1/8 duty cycle
rectangular waveform
@ 217 Hz, A-weighted
-
-91
-
dBFS(A)
Low-Power Mode
TEST CONDITIONS: fCLOCK = 768 kHz, VDD=1.8 V, unless otherwise indicated
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Supply Current2,3
IDD
-
236
270
µA
Sensitivity
S
94 dB SPL @ 1 kHz
-30
-29
-28
dBFS
Signal to Noise Ratio
SNR
94 dB SPL @ 1 kHz,
A-weighted (20 Hz - 8 kHz)
-
64
-
dB(A)
Total Harmonic Distortion
THD
94 dB SPL @ 1 kHz
-
0.1
-
%
Acoustic Overload Point
AOP
10% THD @ 1 kHz
-
122
-
dB SPL
Power Supply Rejection Ratio
PSRR
200 mVpp sinewave @ 1 kHz
-
63
-
dBV/FS
Power Supply Rejection
PSR+N
100 mVpp 1/8 duty cycle
rectangular waveform
@ 217 Hz, A-weighted
(20Hz - 8kHz)
-
-91
-
dBFS(A)
Revision: A 03/04/2015
Sheet 4 of 14 ©2014 Knowles Electronics
Microphone Interface Specifications
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Logic Input High
VIH
0.7xVDD
-
VDD+0.3
V
Logic Input Low
VIL
-0.3
-
0.3xVDD
V
Logic Output High
VOH
IOUT = 2 mA
VDD -0.45
-
-
V
Logic Output Low
VOL
IOUT = 2 mA
-
-
0.45
V
Clock Duty Cycle
fCLOCK ≤ 2.4 MHz
40
-
60
%
2.4MHz fCLOCK ≤ 4.8 MHz
48
50
52
%
Clock Rise/Fall Time
tEDGE
TIL / TIH = 30% / 70%
-
-
3
ns
Delay Time for Data
Assertion
tDD
18
28
40
ns
Delay Time for High Z7
tDZ
3
-
16
ns
1 100% tested.
2 IDD varies with CLOAD according to: ΔIDD = 0.5*VDD*ΔCLOAD*fCLOCK.
3 Typical and Maximum 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),
Low-Power Mode (low clock speed) and Standard Performance Mode (normal operation).
5 Time from fCLOCK < 250 kHz to ISLEEP specification is met when transitioning from Active Mode to Sleep Mode.
6 Time from fCLOCK 351 kHz to all applicable specifications are met when transitioning from Sleep Mode to Active Mode.
7 tHOLD is dependent on CLOAD.
Revision: A 03/04/2015
Sheet 5 of 14 ©2014 Knowles Electronics
3. MICROPHONE STATE DIAGRAM
Performance Mode
3.6 VDD 1.62 V
1.024 MHz fCLOCK 2.475 MHz
3.072 MHz fCLOCK 4.8 MHz
Sleep Mode
3.6 VDD 1.62 V
fCLOCK 250 kHz
Low-Power Mode
3.6 VDD 1.62 V
351 kHz fCLOCK 815 kHz
Powered Down
Mode
VDD = 0 V
Revision: A 03/04/2015
Sheet 6 of 14 ©2014 Knowles Electronics
4. FREQUENCY RESPONSE CURVE
-20.00
-18.00
-16.00
-14.00
-12.00
-10.00
-8.00
-6.00
-4.00
-2.00
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
16.00
18.00
20.00
100 1,000 10,000
dB (Nomalize to 1Khz)
Frequency (Hz)
Typical Free Field Response
Normalized to 1 kHz
CLK=2.4MHz VDD=1.8V
Revision: A 03/04/2015
Sheet 7 of 14 ©2014 Knowles Electronics
5. INTERFACE CIRCUIT
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: Bypass capacitors near each Mic VDD PIN are recommented to provide maximum SNR
performance. It 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
VDD
VDD
SELECT
Mic
(High)
DATA
CLOCK
.1f
.1f
Mic
(Low)
SELECT
tEDGE
DATA
(SELECT = VDD)
tDD
tDV
tDZ
CLOCK
DATA
(SELECT = GND)
VIH
VIL
tDV
tDZ
High Z
Mic (Low)
Data
High Z
Mic (High)
Data
VOH
VOL
tEDGE
VOH
VOL
1/FCLOCK
tDD
tHOLD
tHOLD
Revision: A 03/04/2015
Sheet 8 of 14 ©2014 Knowles Electronics
7. MECHANICAL SPECIFICATIONS
Item
Dimension
Tolerance
Length (L)
3.50
±0.10
Width (W)
2.65
±0.10
Height (H)
0.98
±0.10
Acoustic Port (AP)
Ø0.325
±0.05
Pin #
Pin Name
Type
Description
1
DATA
Digital O
PDM Output
2
SELECT
Digital I
Lo/Hi (L/R) Select
Connect to VDD or GND
3
GROUND
Power
Ground
4
CLOCK
Digital I
Clock Input
5
VDD
Power
Power Supply
Pull low to turn off and do not leave floated
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 03/04/2015
Sheet 9 of 14 ©2014 Knowles Electronics
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 03/04/2015
Sheet 10 of 14 ©2014 Knowles Electronics
10. PACKAGING & MARKING DETAIL
Model Number
Suffix
Reel Diameter
Quantity Per Reel
SPH1641LM4H-1
-8
13
5,900
Alpha Character A:
S”: Knowles SiSonicTM Production
E”: Knowles Engineering Samples
“P”: Knowles Prototype Samples
“JIN NUMBER”:
Unique Job Identification Number
for product traceability
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.
Pin 1
Revision: A 03/04/2015
Sheet 11 of 14 ©2014 Knowles Electronics
11. RECOMMENDED REFLOW PROFILE
Profile Feature
Pb-Free
Average Ramp-up rate (TSMAX to TP)
C/second max.
Preheat
Temperature Min (TSMIN)
Temperature Max (TSMAX)
Time (TSMIN to TSMAX) (tS)
150°C
200°C
60-180 seconds
Time maintained above:
Temperature (TL)
Time (tL)
217°C
60-150 seconds
Peak Temperature (TP)
260°C
Time within 5°C of actual Peak Temperature (tP)
20-40 seconds
Ramp-down rate (TP to TSMAX)
C/second max
Time 25°C to Peak Temperature
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.
Temperature
Time 25°C to Peak
Ramp-down
Ramp-up
TSMIN
TSMAX
TL
TP
tL
tP
tS Preheat
Time
25°C
Revision: A 03/04/2015
Sheet 12 of 14 ©2014 Knowles Electronics
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 03/04/2015
Sheet 13 of 14 ©2014 Knowles Electronics
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
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)
ESD-LID/GND
3 discharges of ±8 kV direct contact to lid while unit is grounded.
(IEC 61000-4-2)
ESD-MM
3 discharges of ±200V 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.
After 3 reflow cycles, the sensitivity of the microphones shall not deviate more than 1 dB
from its initial value.
Revision: A 03/04/2015
Sheet 14 of 14 ©2014 Knowles Electronics
15. SPECIFICATION REVISIONS
Revision
Specification Changes
Date
A
Initial Release (DCN 15-167).
03/04/15
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.

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