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WM8944BECS/R 데이터시트(PDF) 10 Page - Cirrus Logic |
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WM8944BECS/R 데이터시트(HTML) 10 Page - Cirrus Logic |
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10 / 165 page ![]() WM8944B 10 Rev 4.3 ELECTRICAL CHARACTERISTICS Test Conditions DCVDD = 1.8V, DBVDD = LDOVDD = SPKVDD = 3.3V, LDOVOUT = 3.0V, GND = 0V, TA = +25 oC, 1kHz signal, fs = 48kHz, PGA gain = 0dB, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Analogue Inputs (IN1, AUX) Maximum input signal level (changes in proportion to LDOVOUT) Single-ended input INPGA_VOL = 0dB 1.0 0 Vrms dBV Pseudo-differential input INPGA_VOL = 0dB 0.7 -3.1 Vrms dBV Input resistance (IN1/DMICDAT) Input PGA path (+35.25dB) 4.5 k Input PGA path (0dB) 105 Input PGA path (-12dB) 160 Output mixer path (0dB) 15 Output mixer path (-6dB) 30 Direct speaker (0dB) 10 Direct speaker (-6dB) 20 Input resistance (AUX) Input PGA path (All gain settings) 96 k Input capacitance 10 pF Analogue Inputs Programmable Gain Amplifier (PGA) Minimum programmable gain -12 dB Maximum programmable gain 35.25 dB Gain step size Guaranteed monotonic 0.75 dB Mute attenuation 92 dB Common Mode Rejection Ratio 1kHz input 110 dB Speaker Output Programmable Gain Amplifier (PGA) Minimum programmable gain -57 dB Maximum programmable gain 6 dB Gain step size Guaranteed monotonic 1 dB Mute attenuation 71 dB ADC Input Path Performance (Input PGA to ADC) SNR (A-weighted) 84 94 dB THD -1dBFS input -83 -72 dB THD+N -1dBFS input -77 -70 dB PSRR (with respect to LDOVDD) 217Hz, 100mV pk-pk 77 dB 1kHz, 100mV pk-pk 90 |
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