EV_ICS-41351-FX

ICS-41351 Top Port PDM Digital Output Multi-Mode Microphone GENERAL DESCRIPTION APPLICATIONS The ICS-41351 is a multi-mode, low noise digital MEMS microphone in a small package. The ICS-41351 consists of a MEMS microphone element and an impedance converter amplifier followed by a fourth-order Σ-Δ modulator. The digital interface allows the pulse density modulated (PDM) output of two microphones to be time multiplexed on a single data line using a single clock. FEATURES The ICS-41351 has multiple modes of operation: Low Power (AlwaysOn), Standard and Sleep. The ICS-41351 has high SNR and 120 dB SPL AOP in all operational modes. The ICS-41351 is available in a standard 3.5 × 2.65 × 0.98 mm surface-mount package. It is reflow solder compatible with no sensitivity degradation. FUNCTIONAL BLOCK DIAGRAM SPEC Sensitivity SNR Current AOP Clock • • • • • • • • • −26 dB FS ±1 dB 65 dBA 600 µA 120 dB SPL 2.4 MHz LOW-POWER MODE CLK DATA ICS-41351 EV_ICS-41351-FX TEMP RANGE −40°C to +85°C — CHANNEL SELECT InvenSense, Inc. reserves the right to change the detail specifications as may be required to permit improvements in the design of its products. −26 dB FS ±1 dB 65 dBA 230 µA 120 dB SPL 768 kHz 3.5 × 2.65 × 0.98 mm surface-mount package Extended frequency response from 50 Hz to >20 kHz Low power: 230 µA in Low-Power Mode Sleep Mode: 12 µA High power supply rejection (PSR): −93 dB FS Fourth-order Σ-Δ modulator Digital pulse density modulation (PDM) output Compatible with Sn/Pb and Pb-free solder processes RoHS/WEEE compliant PART PDM MODULATOR STANDARD MODE SELECT VDD GND POWER MANAGEMENT Smartphones Microphone Arrays Tablets Cameras Bluetooth Headsets Notebook PCs Security and Surveillance ORDERING INFORMATION ICS-41351 ADC • • • • • • • InvenSense Inc. 1745 Technology Drive, San Jose, CA 95110 U.S.A +1(408) 988–7339 www.invensense.com Document Number: DS-000157 Revision: 1.3 Release Date: 11/15/2019 PACKAGING 13” Tape and Reel ICS-41351 TABLE OF CONTENTS General Description ..................................................................................................................................................................... 1 Applications ................................................................................................................................................................................. 1 Features ....................................................................................................................................................................................... 1 Functional Block Diagram ............................................................................................................................................................ 1 Ordering Information ................................................................................................................................................................... 1 Table of Contents .................................................................................................................................................................................... 2 Specifications .......................................................................................................................................................................................... 4 Table 1. Acoustical/Electrical Characteristics – General .............................................................................................................. 4 Table 2. Acoustical/Electrical Characteristics – Standard Mode.................................................................................................. 4 Table 3. Acoustical/Electrical Characteristics – Low-Power Mode .............................................................................................. 4 Table 4. Digital Input/Output Characteristics .............................................................................................................................. 5 Table 5. PDM Digital Input/Output .............................................................................................................................................. 5 Timing Diagram ............................................................................................................................................................................ 6 Absolute Maximum Ratings .................................................................................................................................................................... 7 Table 6. Absolute Maximum Ratings ........................................................................................................................................... 7 ESD Caution ................................................................................................................................................................................. 7 Soldering Profile........................................................................................................................................................................... 8 Table 7. Recommended Soldering Profile*.................................................................................................................................. 8 Pin Configurations And Function Descriptions ....................................................................................................................................... 9 Table 8. Pin Function Descriptions............................................................................................................................................... 9 Typical Performance Characteristics..................................................................................................................................................... 10 Theory Of Operation ............................................................................................................................................................................. 11 PDM Data Format ...................................................................................................................................................................... 11 Table 9. ICS-41351 Channel Setting ........................................................................................................................................... 11 PDM Microphone Sensitivity ..................................................................................................................................................... 12 Applications Information ...................................................................................................................................................................... 13 Low Power Mode ....................................................................................................................................................................... 13 Dynamic Range Considerations ................................................................................................................................................. 13 Connecting PDM Microphones .................................................................................................................................................. 13 Sleep Mode ................................................................................................................................................................................ 15 Start-Up Time ............................................................................................................................................................................. 15 Supporting Documents ......................................................................................................................................................................... 16 Application Notes – General ...................................................................................................................................................... 16 PCB Design And Land Pattern Layout ................................................................................................................................................... 17 PCB Material And Thickness ...................................................................................................................................................... 18 Handling Instructions ............................................................................................................................................................................ 19 Pick And Place Equipment ......................................................................................................................................................... 19 Reflow Solder ............................................................................................................................................................................. 19 Board Wash................................................................................................................................................................................ 19 Document Number: DS-000157 Revision: 1.3 Page 2 of 23 ICS-41351 Outline Dimensions ............................................................................................................................................................................... 20 Ordering Guide .......................................................................................................................................................................... 21 Revision History ......................................................................................................................................................................... 22 Compliance Declaration Disclaimer ...................................................................................................................................................... 23 Document Number: DS-000157 Revision: 1.3 Page 3 of 23 ICS-41351 SPECIFICATIONS TABLE 1. ACOUSTICAL/ELECTRICAL CHARACTERISTICS – GENERAL TA = 25°C, VDD = 1.8 to 3.3 V, SCK = 1.536 MHz, 32× decimation, CLOAD = 30 pF unless otherwise noted. Typical specifications are not guaranteed. PARAMETER CONDITIONS MIN TYP MAX UNITS NOTES PERFORMANCE Directionality Omni Output Polarity Input acoustic pressure vs. Non-Inverted output data Supply Voltage (VDD) 1.65 3.63 V Sleep Mode Current (IS) SCK < 200 kHz 12 20 µA TABLE 2. ACOUSTICAL/ELECTRICAL CHARACTERISTICS – STANDARD MODE TA = 25°C, VDD = 1.8 to 3.3 V, SCK = 2.4 MHz, 50× decimation, CLOAD = 30 pF unless otherwise noted. Typical specifications are not guaranteed. PARAMETER CONDITIONS MIN TYP MAX UNITS NOTES Sensitivity 1 kHz, 94 dB SPL −27 −26 −25 dB FS 1 Signal-to-Noise Ratio (SNR) 20 kHz bandwidth, A-weighted 65 dBA Equivalent Input Noise (EIN) 20 kHz bandwidth, A-weighted 29 dBA SPL Dynamic Range Derived from EIN and acoustic 91 dB overload point Total Harmonic Distortion (THD) 105 dB SPL 0.2 1 % Power Supply Rejection (PSR) 217 Hz, 100 mV p-p square wave superimposed on VDD = 1.8 V, A−93 dB FS weighted Power Supply Rejection—Swept 1 kHz sine wave 90 dB FS Sine Acoustic Overload Point 10% THD 120 dB SPL Supply Current (IS) VDD = 1.8 V, no load 600 700 µA Note 1: Sensitivity is relative to the RMS level of a sine wave with positive amplitude equal to 100% 1s density and negative amplitude equal to 0% 1s density. TABLE 3. ACOUSTICAL/ELECTRICAL CHARACTERISTICS – LOW-POWER MODE TA = 25°C, VDD = 1.8 to 3.3 V, SCK = 768 kHz, 48× decimation, CLOAD = 30 pF unless otherwise noted. Typical specifications are not guaranteed. PARAMETER CONDITIONS MIN TYP MAX UNITS NOTES Sensitivity 1 kHz, 94 dB SPL −27 −26 −25 dB FS 1 Signal-to-Noise Ratio (SNR) 20 kHz bandwidth, A-weighted 65 dBA Equivalent Input Noise (EIN) 20 kHz bandwidth, A-weighted 29 dBA SPL Dynamic Range Derived from EIN and acoustic 91 dB overload point Total Harmonic Distortion (THD) 105 dB SPL 0.2 1 % Power Supply Rejection (PSR) 217 Hz, 100 mV p-p square wave superimposed on VDD = 1.8 V, A−93 dB FS weighted Power Supply Rejection—Swept 1 kHz sine wave 90 dB FS Sine Acoustic Overload Point 10% THD 120 dB SPL Supply Current (IS) VDD = 1.8 V, no load 230 275 µA Note 1: Sensitivity is relative to the RMS level of a sine wave with positive amplitude equal to 100% 1s density and negative amplitude equal to 0% 1s density. Document Number: DS-000157 Revision: 1.3 Page 4 of 23 ICS-41351 TABLE 4. DIGITAL INPUT/OUTPUT CHARACTERISTICS TA = 25°C, 1.8 V < VDD < 3.3 V, unless otherwise noted. PARAMETER CONDITIONS MIN Input Voltage High (VIH) TYP MAX UNITS 0.65 × VDD V Input Voltage Low (VIL) 0.35 × VDD Output Voltage High (VOH) ILOAD = 0.5 mA Output Voltage Low (VOL) ILOAD = 0.5 mA Output DC Offset Latency Percent of full scale NOTES 0.7 × VDD V V VDD 0 0.3 × VDD 3