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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8955 датащи(PDF) 5 Page - Wolfson Microelectronics plc |
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WM8955 датащи(HTML) 5 Page - Wolfson Microelectronics plc |
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5 / 43 page  Product Preview WM8955L w Product Preview Rev 0.4 May2003 5 ELECTRICAL CHARACTERISTICS Test Conditions DCVDD = 1.5V, AVDD = HPVDD = 3.3V, TA =+25 oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated. PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT DAC to Line-Out (LOUT1/2, ROUT1/2, MONOOUT with 10k Ω Ω Ω Ω / 50pF load) AVDD = 3.3V 98 Signal to Noise Ratio (A-weighted) SNR AVDD = 1.8V 95 dB AVDD = 3.3V -95 Total Harmonic Distortion THD AVDD = 1.8V -90 dB Channel Separation 1kHz signal 90 dB Analogue Mixer Inputs (LINEINL, LINEINR, MONOIN) AVDD = 3.3V 1.0 Full-scale Input Signal Level VINFS AVDD = 1.8V 0.516 Vrms AVDD = 3.3V 95 Signal to Noise Ratio Line-in to Line-Out (A-weighted) SNR AVDD = 1.8V 90 dB AVDD = 3.3V -92 dB Total Harmonic Distortion THD AVDD = 1.8V -92 dB PGA gain = 0dB 20 Input Resistance (signal enters one mixer only) PGA gain = +6dB 10 PGA gain = 0dB 10 Input Resistance (signal enters two mixers) RLINEIN PGA gain = +6dB 5 k Ω MONOIN- input resistance RMONOIN- anygain 20 k Ω Programmable Gain -15 +6 dB Programmable Gain Step Size Monotonic 3 dB Mute Attenuation TBD dB Analogue Outputs (LOUT1/2, ROUT1/2, MONOOUT) 0dB Full scale output voltage AVDD/3.3 Vrms Programmable Gain 1kHz signal -67 +6 dB Programmable Gain Steps Monotonic 80 steps Mute attenuation 1kHz, full scale signal 85 dB Channel Separation 80 90 dB Headphone Output (LOUT1/2, ROUT1/2 with 16 or 32 Ohm load) Output Power per channel PO Output power is verycloselycorrelated with THD; see below. HPVDD=1.8V, RL=32 Ω PO=5mW 0.013 -78 HPVDD=1.8V, RL=16 Ω PO=5mW 0.013 -78 HPVDD=3.3V, RL=32 Ω, PO=20mW 0.01 -80 Total Harmonic Distortion THD HPVDD=3.3V, RL=16 Ω, PO=20mW 0.01 -80 % dB HPVDD = 3.3V 90 dB Signal to Noise Ratio (A-weighted) SNR HPVDD = 1.8V 90 dB |
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