7 (25)

DA9560.001

20 January, 2005

RECOMMENDED EXTERNAL COMPONENTS

Parameter

Symbol

Pin

Name

Min

Typ

Max

Unit

Note

LDO Output

Capacitance

Effective Series

Resistance

ESR

VLDO

0.23

0.01

3

µF

Ohm

1. Ceramic and film capacitors

can be used.

smaller than or equal to the

1. When within this range, stable

values.

LDO Bypass

Capacitance

(Optional: if

used, noise

performance and

PSRR decline,

but rise time is

improved.)

CBP

0.01

µF

1. Ceramic and film capacitors are

best

suited.

For

maximum

output voltage accuracy DC

leakage

current

through

capacitor should be kept as low

as possible. In any case DC

leakage current must be below

100 nA.

LDO Input

Capacitance

VBAT

0.5

µF

1. A big enough input capacitance

is needed to prevent possible

impedance

interactions

between the supply and LDO.

2. Ceramic, tantalum, and film

capacitors can be used. If a

tantalum capacitor is used, it

should be checked that the

surge current rating is sufficient

for the application.

3. In the case that the inductance

between a battery and LDO is

very small (< 0.1 µH), a 0.47 µF

input capacitor is sufficient.

be smaller than the value of

When selecting capacitors, tolerance and temperature coefficient must be considered to make sure that the capacitance and resistance

are between the above specified limits in all potential operating conditions.

Analog Input

Coupling

Capacitor

AUXL,

AUXR,

AIN

470

nF

1. Affects on input signal's pass band

frequence.

SREF Bypass

Capacitor

SREF

3.3

µF

1. A too small value capacitor cannot

effectively

prevent

disturbance

from getting to signal ground.

Load Resistance:

Headphone

HPR,

HPL,

HPCM

16

32

ohm

Load Resistance:

Earpiece

EPP,

EPN

16

32

ohm

Load Resistance:

Loudspeaker

LSP,

LSN

4

8

ohm