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PDF AS3515 Data sheet ( Hoja de datos )
| Número de pieza | AS3515 | |
| Descripción | Stereo Audio Codec | |
| Fabricantes | austriamicrosystems AG | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AS3515 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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AS3515 V15
Data Sheet, Confidential
austriamicrosystems
AS3515
Data Sheet, Confidential
Stereo Audio Codec with System Power Management
1 General Description
The AS3515 is a low power stereo audio codec and is
designed for Portable Digital Audio Applications. It allows
playback in CD quality and recording in FM-stereo quality. It
has a variety of audio inputs and outputs to directly connect
electret microphones, 16Ω headset, 4Ω speaker and auxiliary
signal sources via a 10-channel mixer. It only consumes 22mW
in playback mode.
Further the device offers advanced power management
functions. All necessary ICs and peripherals in a flash based
Digital Audio Player are supplied by the AS3515. The power
management block generates 9 different supply voltages out of
the battery supply. CPU, NAND flash, SRAM, memory cards,
LCD back-light, USB RX/TX can be powered. The different
supply voltages are programmable via the serial control
interface. It also contains a charger and is designed for battery
supplies from 1V to 5V.
The AS3515 has an on-chip, phase locked loop (PLL)
controlled, clock generator. It generates 44.1kHz, 48kHz and
other sample rates defined in MP3, AAC, WMA, OGG VORBIS
etc. No additional external crystal or PLL is needed. Further the
AS3515 has an independent 32kHz real time clock (RTC) on
chip which allows a complete power down of the system CPU.
2 Key Features
Multi-bit Sigma Delta Converters
– DAC: 18bit with 94dB SNR (‘A’ weighted) , 48kHz
– ADC: 14bit with 82dB SNR (‘A’ weighted), 16kHz
2 Microphone Inputs
– 3 gain pre-setting (28dB/34dB/40dB) and AGC
– 32 gain steps @1.5dB and MUTE
– supply for electret microphone
– microphone detection
– remote control by switch
2 Line Inputs
– volume control via serial interface
– 32 steps @1.5dB and MUTE
– stereo or 2x mono or mono differential
Line Outputs
– volume control via serial interface
– 32 steps @1.5dB and MUTE
– 1Vp @10kΩ
– mono differential 5mW to 32Ω (ear-peace)
Audio Mixer
– 10 channel input/output mixer with AGC
– mixes line inputs and microphones with DAC
– left and right channels independent
High Efficiency Headphone Amplifier
– volume control via serial interface
– 32 steps @1.5dB and MUTE
– 2x40mW @16Ω driver capability
– headphone and over-current detection
– phantom ground eliminates large capacitors
High Power Speaker Amplifier
– volume control via serial interface
– 32 steps @1.5dB and MUTE
– 2x500mW @8Ω driver capability
– over-current detection
Power Management
– step up for system supply (3.0V – 3.6V)
– charge pump for CPU core (0.85V – 1.8V, 200mA)
– step up for backlight (15V, 38.5mA)
– LDO for digital supply (2.9V, 200mA)
– LDO for analogue supply (2.9V, 200mA)
– LDO for peripherals (1.7V-3.3V, 200mA)
– LDO for peripherals (3.1V-3.3V, 200mA)
– LDO for RTC (1.0V-2.5V, 2mA)
– LDO for USB 1.1 transceiver (3.26V, 10mA)
– battery supervision
– 10sec emergency shut-down
Battery Charger
– automatic trickle charge (50mA)
– prog. constant current charging (100-400mA)
– prog. constant voltage charging (3.9V-4.25V)
Real Time Clock
– ultra low power 32kHz oscillator
– 32bit RTC sec counter
– selectable alarm (seconds or minutes)
General Purpose ADC
– 10bit resolution
– 16 inputs analogue multiplexer
Interfaces
– I²S digital audio interface
– 2 wire serial control interface
– watchdog via serial interface
– power good pin
– 128bit unique ID (OTP)
– 17 different interrupts
Package
– CTBGA64 [7.0x7.0x1.1mm] 0.8mm pitch
– LQFP64 [10x10x1.4mm] 0.5mm pitch
3 Application
Portable Digital Audio Player and Recorder
PDA, Smartphone
www.austriamicrosystems.com
Revision 3.1
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1 page  
AS3515 V15
Data Sheet, Confidential
austriamicrosystems
Revision History
Revision Date
3.0 5.5.2005
3.01 12.5.2005
3.02 12.5.2005
3.03 12.5.2005
3.03 20.5.2005
3.04 18.10.05
3.04 18.10.05
3.04 11.4.06
3.1 3.6.08
Owner
pkm final release
Description
pkm changed soldering conditions (chapter 5)
pkm updated charge pump and LDO typical performance characteristics(chapter 6.10,
6.11)
pkm spelling corrections (chapter 6.18)
pkm updated 15V DCDC description (chapter 6.14)
pkm updated 3V and 15V DCDC block diagram (chapter 6.9, 6.14)
pkm changed interrupt de-bounce times (6.16)
pkm changed block diagram
pkm V15 changes: RTCSUP startup deleted, UID added, chip ID changed to 6h,
updated package and order information
www.austriamicrosystems.com
Revision 3.1
5 - 66
5 Page 
AS3515 V15
Data Sheet, Confidential
austriamicrosystems
6.2.7 Parameter
Table 8 Power Amplifier Block Characteristics
Symbol
RL
Pout
A0
Ax
PSRR
IOUT_pd
Tpower_up
SNR
Parameter
Output Load
Maximum Output Power
Gain
Gain Step-Size
Gain Step-Precision
Power Supply Rejection Ratio
Short Current Protection Level
IOUT power down
Signal to Noise Ratio
Mute Attenuation
Notes
stereo mode
RL= 32Ω
RL= 16Ω
programmable nominal gain
200Hz-20kHz, 720mVpp, RL= 16Ω
HPGND is forced high (>1V)
BVDD = 3.3V, TA= 25oC unless otherwise mentioned
Min Typ Max Unit
16 Ohm
20 mW
40 mW
-43.43
1.07 dB
1.5 dB
0.5 dB
90 dB
145 mA
-20 20 uA
90 ms
100 dB
100 dB
6.2.8 Register Description
To get an interrupt on an over-current event, the corresponding bit in the IRQ_ENRD1 register (0x26h) has to be set. Also the interrupt
request for HP detection has to be set in this register. The power-save options are controlled via AudioSet3 register (0x16h). All other
headphone driver settings are controlled by the following two registers.
Right Headphone Register (02h)
Table 9 HPH_OUT_R Register
Bit Name
Description
7,6 HP_OVC_TO speaker over current time out:
11: 0 ms
10: 512 ms
01: 128 ms
00: 256 ms
5-
-
4..0 HPR_VOL
volume settings for right headphone output, adjustable in 32 steps @ 1.5dB
11111: 1.07 dB gain
11110: -0.43 dB gain
..
00001: -43.93dB gain
00000: -45.43 dB gain
The register is R/W; default value is 00h
www.austriamicrosystems.com
Revision 3.1
11 - 66
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