1999 May 10 43
Philips Semiconductors Preliminary specification
Universal Serial Bus (USB) CODEC UDA1325
Notes
1. Strongly depends on the external decoupling capacitor connected to Vref(DA).
2. Cref in µF.
3. Although a level of 1.414 V (RMS) would be required to optimal drive the ADC in this gain setting, this level can not
be used. Due to the 3.3 V supply voltage input, signals of 1.17 V (RMS) and higher will result in clipping.
4. Measured with the APLL as ADC clock source.
5. Measured with I2S-bus input as digital source.
Filter stream DAC
RES resolution 16 −−bits
Vo(FS)(rms) full-scale output voltage
(RMS value) VDD = 3.3 V −0.66 −V
SVRR supply voltage ripple rejection at
VDDA and VDDO
fripple = 1 kHz
Vripple(p-p) = 0.1 V
−60 −dB
∆Vochannel unbalance maximum volume −0.03 −dB
αct crosstalk between channels RL=5kΩ−95 −dB
(THD + N)/S total harmonic distortion plus
noise-to-signal ratio fs= 44.1 kHz;
RL=5kΩ; note 5
at input signal of
1 kHz (0 dB)
−−90 −80 dB
−0.0032 0.01 %
at input signal of
1 kHz (−60 dB)
−−30 −20 dB
−3.2 10 %
S/N signal-to-noise ratio at bipolar zero A-weighting at
code 0000H 90 95 −dB
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT