SparkFun BOB-09868

Reference Designs (2)

Attributes

Part Number
Manufacturer
Datasheet
Prefix
U
Lead Free
???
Octopart Part Number
Package
RoHS
???

Pins

1
AUD
2
GND
3
1.4v - 3.3v

Contributors

Datasheet Preview

Omnidirectional Microphone with
Bottom Port and Analog Output
Data Sheet
ADMP401
Rev. E
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©20102012 Analog Devices, Inc. All rights reserved.
FEATURES
4.72 mm × 3.76 mm × 1.0 mm surface-mount package
High SNR of 62 dBA
Sensitivity of42 dBV
Flat frequency response from 100 Hz to 15 kHz
Low current consumption of <250 μA
Single-ended analog output
High PSR of 70 dB
Compatible with Sn/Pb and Pb-free solder processes
RoHS/WEEE compliant
APPLICATIONS
Smartphones and feature phones
Teleconferencing systems
Digital video cameras
Bluetooth headsets
Video phones
Tablets
FUNCTIONAL BLOCK DIAGRAM
OUTPUT
AMPLIFIER
ADMP401
POWER
07712-001
VDD GND
OUTPUT
Figure 1.
GENERAL DESCRIPTION
The ADMP401
1
is a high quality, high performance, low power,
analog output, bottom-ported omnidirectional MEMS
microphone. The ADMP401 consists of a MEMS microphone
element, an impedance converter, and an output amplifier. The
ADMP401 sensitivity specification makes it an excellent choice
for both near field and far field applications. The ADMP401 has
a high SNR and flat wideband frequency response, resulting in
natural sound with high intelligibility. Low current consumption
enables long battery life for portable applications. The ADMP401
complies with the TIA-920 standard, Telecommunications
Telephone Terminal Equipment Transmission Requirements for
Wideband Digital Wireline Telephones.
The ADMP401 is available in a thin, 4.72 mm × 3.76 mm ×
1.0 mm surface-mount package. It is reflow solder compatible
with no sensitivity degradation. The ADMP401 is halide free.
1
Protected by U.S. Patents 7,449,356; 7,825,484; 7,885,423; 7,961,897. Other patents are pending.
OBSOLETE
ADMP401 Data Sheet
Rev. E | Page 2 of 12
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications ..................................................................................... 3
Absolute Maximum Ratings ............................................................ 4
ESD Caution .................................................................................. 4
Pin Configuration and Function Descriptions ............................. 5
Printed Circuit Board (PCB) Land Pattern Layout ...................... 6
Typical Performance Characteristics ............................................. 7
Applications Information ................................................................ 8
Connecting the ADMP401 to a Codec ......................................8
Connecting the ADMP401 to an Op Amp Gain Stage ............8
Supporting Documents ................................................................8
Handling Instructions .......................................................................9
Pick-and-Place Equipment ..........................................................9
Reflow Solder .................................................................................9
Board Wash ....................................................................................9
Reliability Specifications ................................................................ 10
Outline Dimensions ....................................................................... 11
Ordering Guide .......................................................................... 11
REVISION HISTORY
7/12Rev. D to Rev. E
Changes to Features Section, General Description Section, and
Page 1 Layout .................................................................................... 1
Add Note 1 ......................................................................................... 1
Changes to Frequency Response Parameter, Table 1 and Powers
Supply Rejection Parameter, Table 1 .............................................. 3
Changes to Temperature Range Parameter, Table 2 ..................... 4
Changes to Figure 6, Figure 7, and Figure 8.................................. 7
Changes to Applications Information Section and Figure 10..... 8
Added Supporting Documents Section, Application Notes
Section, Circuit Notes Section, and Evaluation Board User
Guides Section .................................................................................. 8
Changes to THB Description Column, Table 5 and Temperature
Cycle Column, Table 5 ................................................................... 10
Changes to Ordering Guide .......................................................... 11
1/12—Rev. C to Rev. D
Updated Outline Dimensions ....................................................... 11
Changes to Figure 12 ...................................................................... 11
Added Figure 13 .............................................................................. 11
Change to Ordering Guide ............................................................ 11
8/
11Rev. B to Rev. C
Changes to Figure 1 ........................................................................... 1
Changes to Table 3 ............................................................................. 4
Removed Terminal Side Down from Figure 3 ............................... 5
Changes to Bullet 2 in Pick-and-Place Equipment Section ......... 9
Changes to Ordering Guide .......................................................... 11
12/10Rev. A to Rev. B
Changes to Applications and General Description Sections ....... 1
Changes to Table 1 ............................................................................. 3
8/10Rev. 0 to Rev. A
Changes to Frequency Response Parameter, Table 1 .................... 3
Changes to Supply Voltage Parameter, Table 2 .............................. 4
Changes to Applications Information Section, Figure 9, and
Figure 10 ............................................................................................. 8
Updated Outline Dimensions ....................................................... 11
4/10Revision 0: Initial Ve rsion
OBSOLETE
Data Sheet ADMP401
Rev. E | Page 3 of 12
SPECIFICATIONS
T
A
= 25°C, V
DD
= 1.8 V, unless otherwise noted. All minimum and maximum specifications are guaranteed. Typical specifications are not
guaranteed.
Table 1.
Parameter Symbol Test Conditions/Comments Min Typ Max Unit
PERFORMANCE
Directionality Omni
Sensitivity 1 kHz, 94 dB SPL −45 42 −39 dBV
Signal-to-Noise Ratio SNR 62 dBA
Equivalent Input Noise EIN 32 dBA SPL
Dynamic Range
88
dB
Frequency Response
1
Low frequency, −3 dB point 60 Hz
High frequency, −3 dB point 15 kHz
Deviation limits from flat response within pass band 3/+2 dB
Total Harmonic Distortion THD 105 dB SPL 3 %
Power Supply Rejection PSR 217 Hz, 100 mV p-p square wave superimposed on V
DD
= 1.8 V 70 dB
Maximum Acoustic Input Peak 120 dB SPL
POWER SUPPLY
Supply Voltage V
DD
1.5 3.3 V
Supply Current
I
S
250
µA
OUTPUT CHARACTERISTICS
Output Impedance Z
OUT
200 Ω
Output DC Offset 0.8 V
Output Current Limit 90 µA
1
See Figure 6 and Figure 7.
OBSOLETE
ADMP401 Data Sheet
Rev. E | Page 4 of 12
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter Rating
Supply Voltage 0.3 V to +3.6 V
Sound Pressure Level (SPL)
160 dB
Mechanical Shock 10,000 g
Vibration Per MIL-STD-883 Method 2007,
Test Condition B
Temperature Range 40°C to +85°C
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ESD CAUTION
07712-002
t
P
t
L
t
25°C TO PEAK
t
S
PREHEAT
CRITICAL ZONE
T
L
TO T
P
TEMPERATURE
TIME
RAMP-DOWN
RAMP-UP
T
SMIN
T
SMAX
T
P
T
L
Figure 2. Recommended Soldering Profile Limits
Table 3. Recommended Soldering Profile Limits
Profile Feature Sn-Pb Pb Free
Average Ramp Rate (T
L
to T
P
) 1.25°C/sec maximum 1.25°C/sec maximum
Preheat
Minimum Temperature (T
SMIN
) 100°C 100°C
Maximum Temperature (T
SMAX
)
150°C
200°C
Time (T
SMIN
to T
SMAX
), t
S
60 sec to 75 sec 60 sec to 75 sec
Ramp-Up Rate (T
SMAX
to T
L
) 1.25°C/sec 1.25°C/sec
Time Maintained Above Liquidous (t
L
) 45 sec to 75 sec ~50 sec
Liquidous Temperature (T
L
) 183°C 217°C
Peak Temperature (T
P
) 215°C +3°C/−3°C 245°C +0°C/−5°C
Time Within 5°C of Actual Peak Temperature (t
P
) 20 sec to 30 sec 20 sec to 30 sec
Ramp-Down Rate 3°C/sec maximum 3°C/sec maximum
Time 25°C (t
25°C
) to Peak Temperature 5 min maximum 5 min maximum
OBSOLETE