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| WM8751L |
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 WOLFSON
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6 page 
WM8751L Production Data w PD Rev 4.2 August 2006 6 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 (L/ROUT1 with 10k Ω / 50pF load) AVDD = 3.3V 98 Signal to Noise Ratio (A-weighted) SNR AVDD = 1.8V 95 dB AVDD = 3.3V -86 Total Harmonic Distortion THD AVDD = 1.8V -82 dB Channel Separation 1kHz signal 100 dB Analogue Mixer Inputs (LINEINL/R to L/ROUT1 with 10k Ω / 50pF load) AVDD = 3.3V 1.0 Full-scale Input Signal Level VINFS AVDD = other AVDD/3.3 Vrms AVDD = 3.3V 98 Signal to Noise Ratio Line-in to Line-Out (A-weighted) SNR AVDD = 1.8V 95 dB AVDD = 3.3V -94 dB Total Harmonic Distortion THD AVDD = 1.8V -90 dB PGA gain = 0dB 20.5 Input Resistance (signal enters one mixer only) PGA gain = +6dB 10.5 PGA gain = 0dB 10.25 Input Resistance (signal enters two mixers) RLINEIN PGA gain = +6dB 5.25 k Ω MONOIN- input resistance RMONOIN- any gain 20 k Ω Common mode rejection ratio CMRR MONOIN+ / MONOIN- to L/ROUT1, 20Hz–20kHz -38 dB Mute Attenuation -91 dB Analogue Outputs (LOUT1/2, ROUT1/2, MONOOUT) 0dB Full scale output voltage AVDD/3.3 Vrms Mute attenuation 1kHz, full scale signal -94 dB Channel Separation -91 dB Headphone Output (LOUT1/2, ROUT1/2 with 16 or 32 Ω load) Output Power per channel PO Output power is very closely correlated with THD; see below. HPVDD=1.8V, RL=32 Ω PO=5mW 0.018 -75 HPVDD=1.8V, RL=16 Ω PO=5mW 0.025 -72 HPVDD=3.3V, RL=32 Ω, PO=20mW 0.013 -78 Total Harmonic Distortion THD HPVDD=3.3V, RL=16 Ω, PO=20mW 0.011 -79 dB % HPVDD = 3.3V 92 96 Signal to Noise Ratio (A-weighted) SNR HPVDD = 1.8V 95 dB Speaker Output (LOUT2/ROUT2 with 8 Ω bridge tied load, ROUT2INV=1) Output Power at 1% THD PO THD = 1% 330 mW (rms) Abs. Max Power Ouptut POmax 500 mW (rms) Total Harmonic Distortion THD Po=200mW, RL=8 Ω, HPVDD=3.3V -63 0.07 dB % Signal to Noise Ratio (A-weighted) SNR HPVDD=3.3V, RL=8 Ω 95 dB Analogue Reference Levels Midrail Reference Voltage VMID –3% AVDD/2 +3% V Buffered Reference Voltage VREF –3% AVDD/2 +3% V |
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