AK4520A Datasheet, PDF (16/19 Pages) Asahi Kasei Microsystems – 100dB 20Bit Stereo ADC & DAC

ASAHI KASEI
[AK4520A]
4. Analog Outputs
The analog outputs are also single-ended and centered around the VCOM voltage. The input signal range
scales with the supply voltage and nominally 0.626 x (VREFH-VREFL) Vpp. The DAC input data format is 2's
complement. The output voltage is a positive full scale for 7FFFFH(@20bit) and a negative full scale for
80000H(@20bit). The ideal output is VCOM voltage for 00000H(@20bit). The internal switched-capacitor filter
and continuous-time filter removes most of the noise generated by the delta-sigma modulator of DAC beyond
the audio passband.
DC offsets on analog outputs are eliminated by AC coupling since DAC outputs have DC offsets of a few mV.
Figure 10 shows the example of external op-amp circuit with 6dB gain. The output signal is inverted by using
the circuit in this case.
Figure 10 . External analog circuit example(gain=6dB)
0163-E-00
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