DA9560.001
20 January, 2005
RECOMMENDED EXTERNAL COMPONENTS
Parameter
Symbol
Pin
Min
Typ
Max
Unit
Note
Name
LDO Output
Capacitance
CL_LDO
VLDO
0.23
CIN_LDO
µF
1. Ceramic and film capacitors
can be used.
2. The value of CL LDO should be
smaller than or equal to the
value of CIN LDO
.
Effective Series
Resistance
ESR
0.01
3
Ohm 1. When within this range, stable
with all IOUT = 0 mA…150 mA
values.
LDO Bypass
Capacitance
(Optional: if
CBP_LDO CBP
0.01
µF
1. Ceramic and film capacitors are
best suited. For maximum
output voltage accuracy DC
CBYPASS is not
used, noise
leakage
current
through
capacitor should be kept as low
as possible. In any case DC
leakage current must be below
100 nA.
performance and
PSRR decline,
but rise time is
improved.)
LDO Input
CIN_LDO VBAT
0.5
µF
1. A big enough input capacitance
is needed to prevent possible
Capacitance
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.
4. The value of CIN_LDO should not
be smaller than the value of
CL_LDO
.
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
CAIN
,
AUXL,
AUXR,
AIN
470
3.3
32
nF
µF
1. Affects on input signal's pass band
frequence.
CAUXL
,
Capacitor
CAUXR
CSREF
SREF Bypass
Capacitor
SREF
1. A too small value capacitor cannot
effectively prevent disturbance
from getting to signal ground.
Load Resistance:
Headphone
RL_HP
HPR,
HPL,
HPCM
EPP,
EPN
16
ohm
Load Resistance:
Earpiece
RL_EP
RL_S
16
4
32
8
ohm
ohm
Load Resistance:
Loudspeaker
LSP,
LSN
7 (25)
MAS [ MICRO ANALOG SYSTEMS ]
