DA7217 datasheet(13/171 Pages) DIALOG

13 / 171 page

DA7217

Ultra-Low Power Stereo Codec

Datasheet

Revision 2.5

01 Sep 2016

CFR0011-120-00

13 of 171

4.4.4

HPR_N

HPR_N is the negative right-channel headphone output for a headphone speaker connected

between HPR_P and HPR_N.

4.5

Charge Pump Pins

4.5.1

HPCSP

HPCSP is the positive output from the headphone charge pump. This pin should be connected to

ground via a reservoir capacitor.

4.5.2

HPCSN

HPCSN is the negative output from the headphone charge pump. If using the charge pump, this pin

must be connected to ground via a reservoir capacitor. If the charge pump is not being used, then

this pin should be tied directly to ground.

4.5.3

HPCFP

HPCFP is one of the flying capacitor connections required by the headphone charge pump. If the

charge pump is in use it must be connected to HPCFN via a capacitor. If the charge pump is not

being used, then this pin can be left floating.

4.5.4

HPCFN

HPCFP is one of the flying capacitor connections required by the headphone charge pump. If the

charge pump is in use it must be connected to HPCFP via a capacitor. If the charge pump is not

being used, then this pin can be left floating.

4.6

References

4.6.1

VMID

VMID is mid-rail reference decoupling capacitor connection.

4.6.2

DACREF

DACREF is the DAC reference decoupling capacitor connection.

4.6.3

VREF

VREF is the bandgap reference decoupling capacitor connection.

4.6.4

MICBIAS1

MICBIAS1 is the first of two MICBIAS outputs. This must be decoupled with a 1 µF capacitor

4.6.5

MICBIAS2

MICBIAS2 is the second of two MICBIAS outputs. This must be decoupled with a 1 µF capacitor.

4.6.6

VDDDIG

VDDDIG is the internal digital supply rail decoupling pin and is used to monitor the LDO output. This

must be decoupled with a 1 µF capacitor.

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