AS3525-A/-B C22O22
Data Sheet, Confidential
2.3 Power Management
Voltage Generation
MS / MS Pro Interface
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Dedicated dual port buffer RAM
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step up for system supply (3.0V-3.6V, 150mA)
charge-pump for CPUcore (1.05V-1.2V, 50mA)
charge pump for USB OTG (5V, 10mA)
LDO for digital supply (2.9V, 200mA)
LDO for analog supply (2.9V, 200mA)
LDO for IO supply (2.94 or 3.11V, 200mA)
LDO for peripherals (1.7V-3.3V, 200mA)
LDO for USB Transceiver (3.26V, 200mA)
LDO for RTC (1.0V-2.5V, 2mA)
Display Interface
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Serial and parallel controller supported
On chip hardware acceleration
Synchronous Serial Interface
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Master and slave operation
8 and 16 bit support
Several protocol standards supported
I2S Interface
15V Back-light step up converter
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Input multiplexed with audio subsystem
selectable SPDIF input conversion
Dedicated dual port buffer RAM
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for driving up to 6 white LEDs in series to achieve a
uniform illumination
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current programmable up to 40mA (1.25mA steps)
2 Wire Serial Control Interface
Li-Io Battery Charger
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Master and slave operation
Standard and fast mode support
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automatic 50mA trickle charging
prog. constant current charging (50 – 400mA)
prog. constant voltage charging (3.9 - 4.25V)
General Purpose IO Interface
4x 8-bit ports
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2.4 System
RTC
2.2 Audio
Multi-bit Sigma Delta Converters
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ultra low power 32kHz oscillator
32bit RTC second counter
selectable alarm (seconds or minutes)
trim able oscillator
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DAC: 18bit with 94dB SNR (‘A’ weighted)
ADC: 14bit with 82dB SNR (‘A’ weighted)
Sampling Frequency: 8-48kHz
32 gain steps @ 1.5dB and MUTE
Oscillator
2 Line Inputs
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low power 12-24MHz Oscillator
generating main system clock
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stereo, 2x mono or mono differential inputs
32 gain steps @ 1.5dB and MUTE
Supervisor
2 Microphone Inputs
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automatic battery monitoring with interrupt generation
and selectable warning level
automatic temperature supervision with interrupt
generation and selectable warning and shutdown
levels
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differential inputs
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3 gain pre-sets (28/34/40 dB) and OFF with AGC
32 gain steps @ 1.5dB and MUTE
microphone detection with about 50uA
supply for electret microphone max 1mA
remote control by switch
General Purpose ADC
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10bit resolution
16 inputs analog multiplexer
Line Output
UID
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max 1Vp @ 10kΩ in single ended stereo mode
>32Ω in mono differential mode to drive ear-pieces
32 gain steps @ 1.5dB and MUTE
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Unique Identification Number in OTP ROM for DRM
support
Stereo Headphone Audio Amplifier
General
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2x 60mW @ 16Ω driver capacity
32 gain steps @ 1.5dB and MUTE
Click- and pop-less start-up and power down
Headphone and over-current detection
Phantom ground eliminates large capacitors
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Reset pin, watchdog
10sec emergency shut-down
Wide battery supply range 1V – 5.5V
MP3 playback with 58mW
Packages:
Stereo Speaker Audio Amplifier
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AS3525-A: CTBGA224 13x13mm, 0.8mm pitch
AS3525-B: CTBGA144 10x10mm, 0.8mm pitch
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2x 500mW @ 4Ω driver capacity
32 gain steps @ 1.5dB and MUTE
Click- and pop-less start-up and power down
Over-current detection
3
Application
Portable Digital Audio Player and Recorder
Portable Digital Media Player
PDA
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10 Channel Audio Mixer
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mixes Line inputs, Mic inputs and DAC output
separate selectable source for right and left channel
possibility to select AGC to prevent clipping
Smartphone
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