DA14AVDDECT SF01

DA14AVDDECT SF01 Datasheet

Datasheet

Revision 2.1

02-Jun-2020

CFR0011-120-00

22 of 25

© 2020 Dialog Semiconductor

5.1

Audio Connections

Analog microphones can be connected as shown in Figure 7.

Figure 7: Connection of Analog Microphones

The bias resistor value shall be selected depending on the microphone requirements and

MICBIAS1/2 must be decoupled with 1 µF capacitors.

Alternatively, up to four digital microphones can be supported by reusing the MIC1_P and MIC2_P

pins as clock outputs and the MIC1_N and MIC2_N pins as digital data inputs. The IO voltage level

of DMIC1 is set by the voltage present on MICBIAS1 and the IO voltage level of DMIC2 is set by the

voltage present on MICBIAS2. The voltage present on MICBIAS1/MICBIAS2 can be either an output

of the MICBIAS LDO or the IO voltage of the DMIC that is connected as an input on the appropriate

MICBIAS pin for a minimum power consumption. The configuration of MICBIAS is through software

and thus is not detailed further in this document.

The DA14AVDDECT module can support headphone detection. Document UM-D-012 [7] explains

how to control this feature in the software. Please contact your Dialog representative for further

details.