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PDF AS3543 Data sheet ( Hoja de datos )
| Número de pieza | AS3543 | |
| Descripción | High End Stereo Audio Codec | |
| Fabricantes | austriamicrosystems AG | |
| Logotipo |  |
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AS3543
High End Stereo Audio Codec with System PMU
Data Sheet
1 General Description
The AS3543 is an ultra low power stereo audio codec
and is designed for Portable Digital Audio Applications.
It allows high-end quality playback with up to 100dBA
SNR and recording in FM quality. With one microphone
(including pre-amplifier and supply for an electret micro-
phone) and two line inputs, it allows connecting a variety
of audio inputs. The different audio signals can be mixed
via a 6-channel mixer and fed to either a headphone out-
put for 16 /32 headsets or a line output. Both outputs
have a ground noise cancellation to use it e.g. in car
docking stations. The audio outputs have also an auto
fading implemented which performs the fade-in, fade-
out as well as the transition between specific volume
levels automatically with an selectable timing.
Further the device offers advanced power management
functions. All necessary ICs and peripherals in a Digital
Audio Player are supplied by the AS3543. It features 2
DCDC converters for core and memory/periphery supply
as well as 4 LDOs. Both DCDC converter feature DVM
(dynamic voltage management) with an selectable tim-
ing for the voltage stepping. The different regulated sup-
ply voltages are programmable via the serial control
interface.
The step-up converter for the backlight can operate up
to 15V (with an external transistor even higher) in volt-
age and current control mode. An internal voltage pro-
tection is limiting the output voltage in the case of
external component failures. 2 high voltage current sinks
can be used to operate two, if needed also unbalanced,
LED strings. An automatic dimming function allows a
logarithmic on/off of the backlight with selectable timing.
AS3543 also contains a Li-Ion battery charger with con-
stant current, constant voltage and trickle charging. The
maximum charging current is 460mA. An integrated bat-
tery switch is separating the battery during charging or
whenever an external power supply is present. With this
switch it is also possible to operate with no or deeply dis-
charged batteries.
The AS3543 has an on-chip, phase locked loop (PLL)
which generates the needed internal CODEC master
clock. I2S Frame and shift-clock have to be applied from
the processor for playback and recording.
Further the AS3543 has an independent 32kHz real time
clock (RTC) on chip which allows a complete power
down of the system CPU while only consuming less than
1µA. An internal switch automatically switches between
the RTC backup-battery and main battery supply.
The single supply voltage may vary from 2.7V to 5.5V.
2 Key Features
Audio
Audio power consumption:
- 5mW: 96dB DAC to Headphone @ 1.8V, 32Ω
- 7mW: 100dB DAC to Headphone @ 2.9V, 32Ω
Sigma Delta Converters
DAC
- 98dB SNR ('A' weighted) @ 1.7V
- 102dB SNR ('A' weighted) @ 2.9V
ADC
- 85dB SNR ('A' weighted) @ 1.7V
Sampling Frequency
- DAC: 8-96kHz
- ADC: 8-24kHz
High Efficiency Headphone Amplifier
volume control via serial interface
32 steps @1.5dB and MUTE
2x12mW @16Ω driver capability@ 1.8V supply
THD -74dB @16Ω; 1.8V
2x40mW @16Ω driver capability@ 3.6V supply
THD -77dB @16Ω; 3.6V
headphone and over-current detection
phantom ground eliminates large capacitors
ground noise cancellation
Line Output
volume control via serial interface
32 steps @1.5dB and MUTE
0.6Vp @10kΩ, 1.8V
ground noise cancellation
www.austriamicrosystems.com
Revision 1.11
1 - 91
1 page  
AS3543 3v2
Data Sheet - Applications
Revision History
Table 1. Revision History
Revision
Date
1.01 17.4.2009
1.10 5.2009
1.11 12.2012
Owner
pkm
pkm
pkm
Description
official release
added audio characterisation data
typo and register bit description corrections
www.austriamicrosystems.com
Revision 1.11
5 - 91
5 Page 
AS3543 3v2
Data Sheet - Electrical Characteristics
6 Electrical Characteristics
BVDD=+2.7V...+5.5V, TA =-20ºC...+85ºC. Typical values are at BVDD=+3.6V, TA=+25ºC, unless otherwise specified.
Table 4. Electrical Characteristics
Symbol
Parameter
Condition
Min Typ Max Unit
Supply Voltages
BVDDx
Battery Supply Voltage
BVDD, BVDDBSW,
BVDDC1, BVDDC2,
BVDDP1
2.7 3.6 5.5 V
BVDDR
RTC secondary Supply
Voltage
1.2 5.5 V
VBUS
USB VBUS Voltage
5.0 5.5 V
CHGIN
Charger Supply Voltage
4.5 5.5 V
HPVDD
HP Supply Voltage
1.8 3.6 V
DVDD
Digital Periphery Supply
Voltage
1.8 2.9 3.6 V
VDD17IN
LDO1 Input Voltage
1.8 3.6 V
FVDD
Digital Supply Voltage
1.75 1.8 3.5 V
AVDD27 Analogue Supply Voltage
2.6 2.7 3.5 V
AVDD17 Analogue Supply Voltage
1.7 1.7 3.5 V
AGND
Analog Ground Voltage
Internally generated
AVDD17
/2
V
VDELTA-
Difference of Negative
Supplies
CVSS12, VSS15V, HPVSS,
AVSS, DVSS, VSS
To achieve good performance, the
negative supply terminals should be
connected to low impedance ground
plane.
-0.1
0.1 V
VDELTA+
Difference of Positive
Supplies
RVDD-AVDD27; AVDD17-AVDD27;
FVDD-AVDD27
AVDD27-HPVDD
0V
0.3 V
BVDD-AVDD27
0.1 V
POR & Watchdog
VPOR_ON
Power-on Reset Activation Power-on Reset activation level when
Level
DVDD decreases
2.15
V
VPOR_OFF
Power-on Reset Release
Level
Power-on Reset release when DVDD
increases
2.0
V
VPOR_HY
Power-on Hysteresis
100 mV
fLRCLK_WD
LRCLK Watchdog
2 4.1 8 kHz
PWRUP
tON_DELAY Delay Time of pin PWRUP
VPWRUP_L
Input Level LOW,
Minimum key press time
Pin PWRUP, BVDD>3V
30 ms
0.5 V
VPWRUP_H
Input Level HIGH
Pin PWRUP, BVDD>3V
Pin PWRUP, BVDD<=3V
BVDD/
3
1
V
V
IPWRUP
Internal Pull-down Current
Source
Pin PWRUP; @2.9V
2.5 7 19 uA
www.austriamicrosystems.com
Revision 1.11
11 - 91
11 Page | ||
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