Datasheet

PCM3070
SLAS724 – FEBRUARY 2011 www.ti.com
Electrical Characteristics, Audio DAC Outputs
At 25°C, AVdd, DVdd, IOVDD = 1.8V, LDO_in = 3.3V, AVdd LDO disabled, f
s
(Audio) = 48kHz, Cref = 10μF on REF PIN, PLL
disabled unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
AUDIO DAC – STEREO SINGLE-ENDED LINE OUTPUT
Load = 10kΩ (single-ended), 56pF
Line Output on AVdd Supply
Input & Output CM=0.9V
Device Setup
DOSR = 128, MCLK=256* f
s
,
Channel Gain = 0dB, word length = 16 bits,
Processing Block = PRB_P1,
Full scale output voltage (0dB) 0.5 V
RMS
SNR Signal-to-noise ratio A-weighted
(1) (2)
All zeros fed to DAC input 87 100 dB
DR Dynamic range, A-weighted
(1) (2)
–60dB 1kHz input full-scale signal, Word 100 dB
length=20 bits
THD+N Total Harmonic Distortion plus Noise –3dB full-scale, 1kHz input signal –83 –70 dB
DAC Gain Error 0 dB, 1kHz input full scale signal 0.3 dB
DAC Mute Attenuation Mute 119 dB
DAC channel separation –1 dB, 1kHz signal, between left and right HP 113 dB
out
100mVpp, 1kHz signal applied to AVdd 73 dB
DAC PSRR
100mVpp, 217Hz signal applied to AVdd 77 dB
AUDIO DAC – STEREO SINGLE-ENDED LINE OUTPUT
Load = 10kΩ (single-ended), 56pF
Line Output on AVdd Supply
Input & Output CM=0.75V; AVdd=1.5V
DOSR = 128
Device Setup
MCLK=256* fs
Channel Gain = –2dB
word length = 20 bits
Processing Block = PRB_P1
Full scale output voltage (0dB) 0.375 V
RMS
SNR Signal-to-noise ratio, A-weighted
(1) (2)
All zeros fed to DAC input 99 dB
DR Dynamic range, A-weighted
(1) (2)
–60dB 1 kHz input full-scale signal 97 dB
THD+N Total Harmonic Distortion plus Noise –1 dB full-scale, 1-kHz input signal –85 dB
AUDIO DAC – STEREO SINGLE-ENDED HEADPHONE OUTPUT
Load = 16Ω (single-ended), 50pF
Headphone Output on AVdd Supply,
Input & Output CM=0.9V, DOSR = 128,
Device Setup
MCLK=256* f
s
, Channel Gain=0dB
word length = 16 bits;
Processing Block = PRB_P1
Full scale output voltage (0dB) 0.5 V
RMS
SNR Signal-to-noise ratio, A-weighted
(1) (2)
All zeros fed to DAC input 87 100 dB
DR Dynamic range, A-weighted
(1) (2)
–60dB 1kHz input full-scale signal, Word 99 dB
Length = 20 bits
THD+N Total Harmonic Distortion plus Noise –3dB full-scale, 1kHz input signal –83 –70 dB
DAC Gain Error 0dB, 1kHz input full scale signal –0.3 dB
DAC Mute Attenuation Mute 122 dB
DAC channel separation –1dB, 1kHz signal, between left and right HP 110 dB
out
(1) Ratio of output level with 1kHz full-scale sine wave input, to the output level with the inputs short circuited, measured A-weighted over a
20Hz to 20kHz bandwidth using an audio analyzer.
(2) All performance measurements done with 20kHz low-pass filter and, where noted, A-weighted filter. Failure to use such a filter may
result in higher THD+N and lower SNR and dynamic range readings than shown in the Electrical Characteristics. The low-pass filter
removes out-of-band noise, which, although not audible, may affect dynamic specification values
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