Omnidirectional Microphone with Bottom Port and Analog Output ADMP405 Data Sheet GENERAL DESCRIPTION Tiny 3.35 mm x 2.50 mm x 0.88 mm surface-mount package High SNR of 62 dBA High sensitivity of -38 dBV Flat frequency response from 200 Hz to 15 kHz Low current consumption: <250 A Single-ended analog output High PSRR of 70 dB Compatible with Sn/Pb and Pb-free solder processes RoHS/WEEE compliant The ADMP405 is a high quality, high performance, low power, analog output, bottom-ported omnidirectional MEMS microphone. The ADMP405 consists of a MEMS microphone element, an impedance converter, and an output amplifier. The ADMP405 sensitivity specification makes it an excellent choice for both near field and far field applications. The ADMP405 has a high SNR and flat wideband frequency response, resulting in natural sound with high intelligibility. The specially designed low frequency cutoff reduces wind noise. Low current consumption enables long battery life for portable applications. A built-in particle filter provides high reliability. The ADMP405 complies with the TIA-920 Telecommunications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones standard. TE FEATURES The ADMP405 is available in an ultraminiature 3.35 mm x 2.50 mm x 0.88 mm surface-mount package. It is reflow solder compatible with no sensitivity degradation. The ADMP405 is halide free. B SO Smartphones and feature phones Teleconferencing systems Digital video cameras Bluetooth headsets Video phones Tablets LE APPLICATIONS FUNCTIONAL BLOCK DIAGRAM OUTPUT AMPLIFIER 09027-001 VDD POWER GND O ADMP405 OUTPUT Figure 1. Rev. B 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 (c)2010-2011 Analog Devices, Inc. All rights reserved. ADMP405 Data Sheet TABLE OF CONTENTS Connecting to Analog Devices, Inc., Audio Codecs ................7 Applications ....................................................................................... 1 Supporting Documents ................................................................7 General Description ......................................................................... 1 PCB Land Pattern Layout .................................................................8 Functional Block Diagram .............................................................. 1 Handling Instructions .......................................................................9 Revision History ............................................................................... 2 Pick-and-Place Equipment ..........................................................9 Specifications..................................................................................... 3 Reflow Solder .................................................................................9 Absolute Maximum Ratings............................................................ 4 Board Wash ....................................................................................9 ESD Caution .................................................................................. 4 Reliability Specifications ................................................................ 10 Pin Configuration and Function Descriptions ............................. 5 Outline Dimensions ....................................................................... 11 Typical Performance Characteristics ............................................. 6 Ordering Guide .......................................................................... 11 TE Features .............................................................................................. 1 Applications Information ................................................................ 7 REVISION HISTORY 2/11--Rev. 0 to Rev. A LE 9/11--Rev. A to Rev. B Changes to Figure 1 .......................................................................... 1 Changes to Supply Voltage Parameter, Table 1 ............................. 3 Changes to Table 3 ............................................................................ 4 Added Connecting to Analog Devices, Inc., Audio Codecs Section and Supporting Documents Section ................................ 7 Changes to Pick and Place Equipment Section (20 kg to 10 kg) .................................................................................. 9 Added LGA_CAV Tape and Reel Outline Dimensions, Figure 12 .......................................................................................... 11 Changes to Applications Section and General Description Section ........................................................1 Change to Table 1 ..............................................................................3 Changes to Table 2.............................................................................4 O B SO 7/10--Revision 0: Initial Version Rev. B | Page 2 of 12 Data Sheet ADMP405 SPECIFICATIONS TA = 25C, VDD = 1.8 V, unless otherwise noted. All minimum and maximum specifications are guaranteed. Typical specifications are not guaranteed. Table 1. 1 kHz, 94 dB SPL -41 SNR EIN THD PSRR VDD IS ZOUT Derived from EIN and maximum acoustic input Low frequency -3 dB point High frequency -3 dB point Deviation limits from flat response within pass band 105 dB SPL 217 Hz, 100 mV p-p square wave superimposed on VDD = 1.8 V Peak Typ Max Unit -35 dBV dBA dBA SPL dB Hz kHz dB 3 70 % dB 120 dB SPL Omni -38 62 32 88 200 15 -3/+2 1.5 See Figure 4 and Figure 6. O 1 Min B SO Maximum Acoustic Input POWER SUPPLY Supply Voltage Supply Current OUTPUT CHARACTERISTICS Output Impedance Output DC Offset Output Current Limit Test Conditions/Comments TE Total Harmonic Distortion Power Supply Rejection Ratio Symbol LE Parameter PERFORMANCE Directionality Sensitivity Signal-to-Noise Ratio Equivalent Input Noise Dynamic Range Frequency Response 1 Rev. B | Page 3 of 12 3.3 250 200 0.8 90 V A V A ADMP405 Data Sheet ABSOLUTE MAXIMUM RATINGS 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. Table 2. Parameter Supply Voltage Sound Pressure Level (SPL) Mechanical Shock Vibration Temperature Range Rating -0.3 V to 3.6 V 160 dB 10,000 g Per MIL-STD-883 Method 2007, Test Condition B -40C to +70C CRITICAL ZONE TL TO TP LE tP TP TE ESD CAUTION TSMAX TSMIN tL tS RAMP-DOWN B SO PREHEAT 09027-002 TEMPERATURE RAMP-UP TL t25C TO PEAK TIME Figure 2. Recommended Soldering Profile Limits Table 3. Recommended Soldering Profile Limits O Profile Feature Average Ramp Rate (TL to TP) Preheat Minimum Temperature (TSMIN) Maximum Temperature (TSMAX) Time (TSMIN to TSMAX), tS Ramp-Up Rate (TSMAX to TL) Time Maintained Above Liquidous (tL) Liquidous Temperature (TL) Peak Temperature (TP) Time Within 5C of Actual Peak Temperature (tP) Ramp-Down Rate Time 25C (t25C) to Peak Temperature Rev. B | Page 4 of 12 Sn63/Pb37 1.25C/sec max Pb Free 1.25C/sec max 100C 150C 60 sec to 75 sec 1.25C/sec 45 sec to 75 sec 183C 215C + 3C/-3C 20 sec to 30 sec 3C/sec max 5 minute max 150C 200C 60 sec to 75 sec 1.25C/sec ~50 sec 217C 245C + 0C/-5C 20 sec to 30 sec 3C/sec max 5 minute max Data Sheet ADMP405 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS GND 1 2 OUTPUT 3 VDD TOP VIEW (TERMINAL SIDE DOWN) Not to Scale 09027-003 ADMP405 TE Figure 3. Pin Configuration Table 4. Pin Function Descriptions Mnemonic OUTPUT GND VDD Description Analog Output Signal. Ground. Power Supply. O B SO LE Pin No. 1 2 3 Rev. B | Page 5 of 12 ADMP405 Data Sheet TYPICAL PERFORMANCE CHARACTERISTICS 10 10 8 6 0 2 (dB) 0 -2 -10 -4 TE -6 -8 100 1k -20 100 09027-004 -10 10k FREQUENCY (Hz) Figure 4. Frequency Response Mask LE -10 -30 -70 -80 100 1k 10k FREQUENCY (Hz) 09027-005 -60 B SO -40 Figure 5. Typical Power Supply Rejection Ratio vs. Frequency O PSRR (dB) -20 10k Figure 6. Typical Frequency Response (Measured) 0 -50 1k FREQUENCY (Hz) Rev. B | Page 6 of 12 09027-006 SENSITIVITY (dB) 4 Data Sheet ADMP405 APPLICATIONS INFORMATION GAIN = (R1 + R2)/R1 CONNECTING TO ANALOG DEVICES, INC., AUDIO CODECS CM OP177 VOUT OUTPUT GND 10k VREF Figure 8. ADMP405 Connected to the OP177 Op Amp SUPPORTING DOCUMENTS Application Notes LINN LINP 1F MINIMUM TE GND ADAU1761 OR ADAU1361 AN-1003, Recommendations for Mounting and Connecting Analog Devices, Inc., Bottom-Ported MEMS Microphones 09027-020 2.2F MINIMUM OUTPUT VDD ADMP405 UG-143, EVAL-ADMP405Z-FLEX: Bottom-Ported Analog Output MEMS Microphone Evaluation Board 0.1F ADMP405 R2 Evaluation Board User Guide MICBIAS VDD R1 VREF 09027-021 The ADMP405 output can be connected to a dedicated codec microphone input (see Figure 7) or to a high input impedance gain stage (see Figure 8). A 0.1 F ceramic capacitor placed close to the ADMP405 supply pin is used for testing and is recommended to adequately decouple the microphone from noise on the power supply. A dc-blocking capacitor is required at the output of the microphone. 0.1F AN-1068, Reflow Soldering of the MEMS Microphone LE Figure 7. ADMP405 Connected to the Analog Devices ADAU1761 or ADAU1361 Codec AN-1112, Microphone Specifications Explained O B SO AN-1124, Recommendations for Sealing Analog Devices, Inc., Bottom-Port MEMS Microphones from Dust and Liquid Ingress Rev. B | Page 7 of 12 ADMP405 Data Sheet PCB LAND PATTERN LAYOUT solder paste stencil pattern layout is shown in Figure 10. The diameter of the sound hole in the PCB should be larger than the diameter of the sound port of the microphone. A minimum diameter of 0.5 mm is recommended. The recommended PCB land pattern for the ADMP405 should be laid out to a 1:1 ratio to the solder pads on the microphone package, as shown in Figure 9. Care should be taken to avoid applying solder paste to the sound hole in the PCB. A suggested 1.52 0.68 1.22 TE 0.61 O1.55 1.90 O0.95 0.90 Figure 9. PCB Land Pattern Layout 1.55/1.05 DIA. 0.225 CUT WIDTH (2x) 2x B SO 0.8 x 0.6 0.2 x 45 TYP 1.52mm 09027-008 1.22 O Figure 10. Suggested Solder Paste Stencil Pattern Layout Rev. B | Page 8 of 12 09027-007 LE 0.61 Data Sheet ADMP405 HANDLING INSTRUCTIONS PICK-AND-PLACE EQUIPMENT REFLOW SOLDER The MEMS microphone can be handled using standard pickand-place and chip shooting equipment. Care should be taken to avoid damage to the MEMS microphone structure as follows: For best results, the soldering profile should be in accordance with the recommendations of the manufacturer of the solder paste used to attach the MEMS microphone to the PCB. It is recommended that the solder reflow profile not exceed the limit conditions specified in Figure 2 and Table 3. * * BOARD WASH When washing the PCB, ensure that water does not make contact with the microphone port. Blow-off procedures and ultrasonic cleaning must not be used. O B SO LE * Use a standard pickup tool to handle the microphone. Because the microphone hole is on the bottom of the package, the pickup tool can make contact with any part of the lid surface. Use care during pick-and-place to ensure that no high shock events above 10 kg are experienced because such events may cause damage to the microphone. Do not pick up the microphone with a vacuum tool that makes contact with the bottom side of the microphone. Do not pull air out of or blow air into the microphone port. Do not use excessive force to place the microphone on the PCB. TE * Rev. B | Page 9 of 12 ADMP405 Data Sheet RELIABILITY SPECIFICATIONS The microphone sensitivity after stress must deviate by no more than 3 dB from the initial value. Table 5. TE Description -40C, 500 hours, powered +125C, 500 hours, powered +65C/85% relative humidity (RH), 500 hours, powered -40C/+125C, one cycle per hour, 100 cycles +150C, 500 hours -40C, 500 hours All pins, 0.5 kV All pins, 1.5 kV All pins, 0.2 kV O B SO LE Stress Test Low Temperature Operating Life High Temperature Operating Life Temperature Humidity Bias (THB) Temperature Cycle High Temperature Storage Low Temperature Storage Component Charge Device Model (CDM) ESD Component Human Body Model (HBM) ESD Component Machine Model (MM) ESD Rev. B | Page 10 of 12 Data Sheet ADMP405 OUTLINE DIMENSIONS 3.425 3.350 3.275 0.75 REF REFERENCE CORNER 3.06 REF PIN 1 1.08 1.52 0.30 BSC 0.30 BSC 0.90 x 0.68 (PINS 1, 3) 1.56 DIA. 1 2.575 2.500 2.425 0.25 NOM DIA. 0.20 MIN THRU HOLE (SOUND PORT) 0.95 DIA. 0.54 REF 2 1.22 BSC 2.21 REF 1.25 3 SIDE VIEW BOTTOM VIEW 06-16-2010-A 0.65 REF 0.64 REF 0.20 TYP x 45 TE TOP VIEW 0.98 0.88 0.78 0.21 REF LE Figure 11. 3-Terminal Chip Array Small Outline No Lead Cavity [LGA_CAV] 3.35 mm x 2.50 mm Body (CE-3-2) Dimensions shown in millimeters 01.5 +0.1/0.0 4.0 2.0 0.05 (SEE NOTE 3) 4.0 (SEE NOTE 1) 0.25 0.05 B SO R 0.2 MAX 12.0 +0.3/-0.1 1.75 0.1 A 5.5 0.05 (SEE NOTE 3) BO 3.85 AO 1.25 KO 2.90 R 0.3 TYP A 0.76 MIN O 09027-009 NOTES 1. 10 SPROCKET HOLE PITCH CUMULATIVE TOLERANCE 0.2. 2. CAMBER IN COMPLIANCE WITH EIA 481. 3. POCKET POSITION RELATIVE TO SPROCKET HOLE MEASURED AS TRUE POSITION OF POCKET, NOT POCKET HOLE. 4. AO AND BO ARE CALCULATED ON A PLANE AT A DISTANCE "R" ABOVE THE BOTTOM OF THE POCKET. 1.13 POCKET HOLE OFFSET Figure 12. LGA_CAV Tape and Reel Outline Dimensions Dimensions shown in millimeters ORDERING GUIDE Model 1 ADMP405ACEZ-RL ADMP405ACEZ-RL7 EVAL-ADMP405Z-FLEX 1 2 Temperature Range -40C to +70C -40C to +70C Package Description 3-Terminal LGA_CAV, 13" Tape and Reel 3-Terminal LGA_CAV, 7" Tape and Reel Evaluation Board Z = RoHS Compliant Part. This package option is halide free. Rev. B | Page 11 of 12 Package Option 2 CE-3-2 CE-3-2 Ordering Quantity 10,000 1,000 ADMP405 Data Sheet O B SO LE TE NOTES (c)2010-2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09027-0-9/11(B) Rev. B | Page 12 of 12 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc.: EVAL-ADMP405Z-FLEX EVAL-ADMP406Z-FLEX