Datenblatt-Suchmaschine für elektronische Bauteile |
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ADMP421BCEZ-RL Datenblatt(PDF) 4 Page - Analog Devices |
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ADMP421BCEZ-RL Datenblatt(HTML) 4 Page - Analog Devices |
4 / 17 page Data Sheet ADMP421 Rev. D | Page 3 of 16 SPECIFICATIONS TA = 25°C, VDD = 1.8 V, CLK = 2.4 MHz, 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 Sensitivity1 1 kHz, 94 dB SPL −29 −26 −23 dBFS Signal-to-Noise Ratio SNR 20 kHz bandwidth, A-weighted 61 dBA Equivalent Input Noise EIN 20 kHz bandwidth, A-weighted 33 dBA SPL Dynamic Range Derived from EIN and maximum acoustic input 87 dB Frequency Response2 Low frequency −3 dB point 100 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 VDD = 1.8 V 80 dBFS Maximum Acoustic Input Peak 120 dB SPL INPUT CHARACTERISTICS Clock Frequency CLK 1.0 2.43 3.3 MHz Clock Duty Ratio Clock frequency of 2.4 MHz or less 40 60 % Input Voltage High VIH 0.65 × VDD V Input Voltage Low VIL 0.35 × VDD V OUTPUT CHARACTERISTICS Output Voltage High VOH ILOAD = 0.5 mA 0.7 × VDD VDD V Output Voltage Low VOL ILOAD = 0.5 mA 0 0.3 × VDD V Latency <30 µs Wake-Up Time From sleep mode, power on 10 ms POWER SUPPLY Supply Voltage VDD 1.8 3.3 V Supply Current IS Normal mode 650 µA Sleep mode4 50 µA 1 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. 2 See Figure 5 and Figure 6. 3 The microphone operates at any clock frequency between 1.0 MHz and 3.3 MHz. Some specifications may not be guaranteed at frequencies other than 2.4 MHz. 4 The microphone enters sleep mode when the clock is turned off or the clock frequency is less than 1 kHz. |
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