DA9021 datasheet(136/142 Pages) DIALOG

Part #	DA9021

Description	System PMIC with high efficiency USB power manager

PDF	142 Pages

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Manufacturer	DIALOG [Dialog Semiconductor]

Direct Link	http://www.dialog-semiconductor.com/

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136 / 142 page

DA9021/22

System PMIC with high efficiency USB power manager

Company confidential

Datasheet

Revision 2.5

17-Feb-2017

CFR0011-120-00 Rev 5

136 of 142

Table 156: Example NTC

Type

Size

Manufacturer

NCP15XH103J03RC

0402

Murata

23.6 Crystal

The RTC module requires an external 32.768 kHz crystal.

For crystal selection the effective load capacitance has to be taken into account. It includes both

external capacitors on pins XIN and XOUT in series combination and the PCB and DA9021 stray

capacitances.

For example, if 2x12 pF external capacitors are used, which gives a series combination of 6 pF, and

the stray capacitance is 3 pF, then the crystal type specified for a load capacitance of 9 pF should be

chosen.

Different stray capacitances may require different external capacitors and/or a different crystal type.

Furthermore the series resistance of the crystal must not exceed 100 k

Ω.

Table 157: Example crystal

Type

Size

Manufacturer

CC7V-T1A 32.768 kHz 9.0 pF +/-

30 ppm

3.2x1.5x0.9 mm

Micro Crystal

DA9021 Datasheet(PDF) 136 Page - Dialog Semiconductor