SPK0641HT4H-1 TM Digital SiSonic Microphone SPK0641HT4H-1 Rev A With Multiple Performance Modes Datasheet The SPK0641HT4H-1 is a miniature, high-performance, low power, top port silicon digital microphone TM with a single-bit PDM output. Using Knowles proven high performance SiSonic MEMS technology, the SPK0641HT4H-1 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. The high Signal-to-Noise Ratio (SNR) of the SPK0641HT4H-1 enhances the performance of far-field applications and many complex, multi-microphone algorithms. In addition, the SPK0641HT4H-1 offers multiple performance modes. Product Features PDM Output Low Distortion of 2.2% at 115dB SPL Supports Dual Multiplexed Channels Signal-to-Noise Ratio of 64.5dB(A) Ultra-Stable Performance Flat Frequency Response 20 - 20kHz Standard SMD Reflow High Drive Capability Omnidirectional Low Current Consumption of 230uA in Low- Sensitivity Matching Power Mode Standard 4x3x1 package size RF Shielded Typical Applications Portable electronics Tablets Cellphones Digital Still Cameras Laptop Computers Portable Music Recorders knowles.com Datasheet SPK0641HT4H-1 Rev A Copyright 2016 Knowles 1 Absolute Maximum Ratings Table 1: Absolute Maximum Ratings Parameter Absolute Maximum Rating Units Parameter Absolute Maximum Rating Units Vdd, DATA to Ground -0.3, +5.0 V Input Current 5 mA CLOCK to Ground -0.3, +5.0 V Short Circuit to/from DATA Indefinite to Ground or Vdd sec SELECT to Ground -0.3, +5.0 V Temperature -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. 1 Acoustic & Electrical Specifications Table 2: General Microphone Specifications Test Conditions: 232C, 5520% R.H., Vdd=1.8V, Fclock=2.4MHz, SEL grounded, no load, Tedge<3ns unless otherwise indicated Parameter Symbol Conditions Min Typ Max Units Supply Voltage Vdd 1.6 1.8 3.6 V DC Output Fullscale = 100 - 0 - % FS Directivity Omnidirectional Polarity Increasing sound pressure Increasing density of 1s Data Format Cycle PDM Short Circuit Current Isc Grounded DATA pin 1 - 20 mA Output Load Cload - - 140 pF 3,4 Fall-asleep Time Fclock < 250 kHz - - 10 ms 3,5 Wake-up Time Fclock 350kHz - - 15 ms 3 Power-up Time Vdd V(min) - - 50 ms 3 Mode Change Time - - 10 ms Table 3: Performance Mode Microphone Specifications Test Conditions: 232C, 5520% R.H., Vdd=1.8V, Fclock=2.4MHz, SEL grounded, no load, Tedge<3ns unless otherwise indicated Parameter Symbol Conditions Min Typ Max Units Clock Frequency Fclock 1.000 - 4.800 MHz 2 Supply Current Idd Vdd = 1.8V - 630 710 A 2 Supply Current Idd Vdd = 3.6V - 700 800 A Sensitivity S 94 dB SPL 1 kHz -27 -26 -25 dBFS Sensitivity Drop Vdd(min) < Vdd < Vdd(max) - - 0.25 dB Signal to Noise Ratio SNR 94 dB SPL 1 kHz, A-weighted - 64.5 - dB(A) Total Harmonic Distortion THD 94 dB SPL 1 kHz, S = Typ - 0.1 - % Total Harmonic Distortion THD 115 dB SPL 1 kHz, S = Typ - 2.2 - % Acoustic Overload Point AOP 10% THD 1 kHz, S = Typ - 120 - dB SPL Low Frequency Roll-Off LFRO 3 dB below 1 kHz Sensitivity - 35 - Hz Power Supply Rejection PSRR 200 mVpp sinewave 1 kHz - 70 - dBV/FS Ratio 100mVpp square wave Power Supply Rejection PSR + N - -90 - dBFS(A) 217 Hz, A-weighted knowles.com Datasheet SPK0641HT4H-1 Rev A Copyright 2016 Knowles 2