AK4373 Datasheet, PDF (58/98 Pages) Asahi Kasei Microsystems – Low Power Stereo DAC with HP/SPK-Amp

[AK4373]
■ Analog Mixing: Monaural input
When PMMIN bit is set to “1”, the mono input is powered-up. When MINH/S bits are set to “1”, the input signal from the
MIN+/MIN- pin is output to HP-Amp/Speaker-Amp. The external resisters Ri adjust the signal gain of MIN+/MIN-
input. If the Analog Mixing block will use as a single-ended, the MIN- pin should be connected to VSS1 in series with
capacitor to avoid induced external noise.(Figure 51)
When the headphone output type is Differential (HPBTL bit = “1”), HVDD should be the same as the voltage of AVDD
to use the path from MIN to HP-Amp(MINH bit = “1”).
DAC
DACH/S bit
MINH/S bit
−
+
−
+
HP Amp / SPK Amp
MIN- pin
Rin
20 k(ty p)
MIN+ pin
Rin
20k (typ )
2 0k(t yp)
−
+
−
+
Figure 50. Block Diagram of Monaural input (Differential Input)
DAC
DACH/S bit
MINH/S bit
−
+
−
+
HP Amp / SPK Amp
MIN- pin
20k(typ)
MIN+ pin
Rin
2 0k(t yp)
20 k(ty p)
−
+
−
+
Figure 51. Block Diagram of Monaural input (Single Input)
MS0991-E-00
- 58 -
2008/09