AK5730 Datasheet, PDF (28/50 Pages) Asahi Kasei Microsystems – 4-Channel Differential Audio ADC for Line & Mic Inputs

[AK5730]
Different types of microphones can be connected at the same time, with the same phantom voltage.
Mic
Bias,
CP
Mic
IN*+
IN*-
Figure 25. Microphone Input Mode(IN*+/- pins)
For Fault Conditions, refer to Table 10 and Figure 26.
Fault Conditions
Conditions
Positive/Negative input shorted to VBAT
VDC+/- ≥Vbias + Vth
Positive/Negative input shorted to GND
VDC+/- ≤ Vth
Pos. and neg. inputs shorted
|VDC+ - VDC-| ≤ Vth
Positive input open
Vbias - Vth ≤ VDC+ ≤ Vbias + Vth
Negative input open
VDC+/- ≤ Vth
Note. It is not possible to distinguish “Positive/Negative input shorted to GND” and “Negative input open”.
Vth: Error Monitor Threshold Voltage. Vth is set by Table 18.
Table 10 Fault Conditions (Microphone Input Mode)
Vbias
R1
Mic
VDC+
Mic
Bias,
CP
INM*P
R2
VDC-
INM*N
Figure 26. Microphone Input Mode (IN*MP/N pins)
Rev 0.8
- 28 -
2013/06