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CS7250B датащи(PDF) 6 Page - Cirrus Logic |
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CS7250B датащи(HTML) 6 Page - Cirrus Logic |
6 / 11 page 6 DS1072PP1 CS7250B 3 Characteristics and Specifications Table 3-4. Acoustic and Electrical Characteristics Test conditions (unless specified otherwise): VDD = 1.8 V, GND = 0 V, CLK = 3.072 MHz, TA = +25ºC, 55 ±15% RH, 1-kHz, 94 dB SPL test signal, no load on DATA pin. Parameter 1 1.Performance measurements are specified with a low-pass brick-wall filter and, where noted, an A-weighted filter. The low-pass filter removes out-of-band noise. The Low Power Mode is measured with a cut-off frequency of 8 kHz; all other measurements are with a 20 kHz cut-off frequency. Min Typ Max Units General characteristics Directivity Omnidirectional — Polarity Positive sound pressure Increasing density of 1s — Sensitivity 2 2.Sensitivity is measured at production test 0.9 s after power up. –37 –36 –35 dBFS High Performance Mode (CLK = 3.072 MHz) Acoustic overload THD < 10% — 131 — dB SPL THD 94 dB SPL 125 dB SPL — — 0.2 1 — — % % SNR A-weighted — 66 — dB DR A-weighted — 103 — dB Acoustic noise floor A-weighted — 28 — dB SPL Electrical noise floor A-weighted — –102 — dBFS PSR (with respect to VDD) 100 mV p-p, swept sine wave, 20 Hz–20 kHz, A-weighted — –90 — dBFS Low Power Mode (CLK = 768 kHz) Acoustic overload THD < 10% — 120 — dB SPL THD 117 dB SPL — 1 — % SNR 20Hz–8kHz, A-weighted — 62 — dB DR 20 Hz–8 kHz, A-weighted — 88 — dB Acoustic noise floor 20 Hz–8 kHz, A-weighted — 32 — dB SPL Electrical noise floor 20 Hz–8 kHz, A-weighted — –98 — dBFS PSR (with respect to VDD) 100 mV p-p, swept sine wave, 20 Hz–8 kHz, A-weighted — –90 — dBFS Frequency response Frequency response –3 dB low frequency +3 dB high frequency — — 35 13 — — Hz kHz Frequency response flatness 200 Hz–8 kHz –1 — +1 dB Digital I/O 3 3.Note that digital input pins should not be left unconnected or floating. Input HIGH Level 0.65 VDD — — V Input LOW Level — — 0.35 VDD V Output HIGH Level IOH = 1 mA 0.9 VDD — — V Output LOW Level IOL = –1 mA — — 0.1 VDD V Input capacitance — 3 5 pF Input leakage –1 — 1 A Load capacitance (DATA) — — 200 pF Miscellaneous characteristics Current consumption 4 4.Measured without a load on the DATA pin. High Performance Mode, CLK = 3.072 MHz Low Power Mode, CLK = 768 kHz Standby Mode, CLK = 0 Hz — — — 650 160 5 — — 10 A A A Startup time From power applied to output within 0.5 dB of sensitivity specification —15— ms Mode-transition time From Low Power Mode to High Performance Mode —10— ms CLK frequency range 5,6 5.High Performance and Low Power Modes are selected according to the CLK frequency. 6.Standby Mode is selected when the CLK input is stopped; this is a power-saving mode. Normal operation resumes automatically when the CLK input frequency is within the specified operational limits. Note that the VDD supply is still required in Standby Mode. High Performance Mode Low Power Mode Standby Mode 1.4 300 — — — 0 3.2 800 — MHz kHz Hz |
Аналогичный номер детали - CS7250B |
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Аналогичное описание - CS7250B |
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