Preliminary Datasheet AS3510
Rev. 1v2, June 2004 Page 1 of 2
General Description
The AS3510 combines high flexibility and outstanding
performance for analog audio front-end solutions.
This codec-chip contains a high performance 18 bit digital
to analog converter. The dynamic range exceeds 95dB for
best audio quality, for multi media applications (audio
playback) within battery or line operated equipment.
An additional audio power amplifier can directly drive
external headphones or small 4
speakers with a power of
up to half a watt. The power-up is click- and pop-less due to
a smooth start-up circuitry. The overall distortion level is
always below 0.02%.
The microphone input amplifier contains an automatic gain
control (AGC) with a dynamic range of 40dB to generate an
amplified and compressed signal for the ADC, which
provides 14 Bit resolution at 8kHz sampling-rate.
Furthermore all necessary power management is included
such as bandgap reference and four voltage regulators. The
two 2.9V regulators are used internally (analog and digital
supply), but can also be used for external purposes as well.
The third output is designed to supply the peripheral cells
and an external digital core, and is programmable from 1.5V
to 2.5V in 5 steps (default is 2.5V). They are all powered
through a DCDC-Converter, which can work down to a
voltage of 1V. So the whole chip can work from a single
battery cell.
The fourth regulator is only used for generating the supply
voltage for the analog USB 1.1 interface circuit. It is
supplied via the USB connector. The performance of the
regulators is excellent (noise, line- and load-regulation) and
allows the direct supply of sensitive analog circuits.
Because of the internal supply and signal filtering only few
small external capacitors are required for de-coupling and
stabilising and lead to very low output noise.
The current consumption is very low and makes the chip
ideally for battery powered devices.
Key Features
On chip DCDC Converter
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1.0 to 5.5V input voltage range
4 On-chip high performance voltage regulators
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Digital Supply, 2.9V
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Analog Supply, 2.9V
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Core Supply, 1.5 to 2.5V
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USB Transceiver Supply, 3.2V
18 Bit stereo DAC
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Dynamic range >95 dB
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THD < -85dB
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De-emphasis for 32 kHz, 44.1 kHz and 48 kHz
Stereo power audio amplifier
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Max. 2x 0.5W @ 4
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Analog volume control 39dB to +3dB, 3dB steps
including mute)
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Click- and pop-less startup and power down
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Auxiliary inputs for additional audio sources
Microphone input
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14 Bit
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ADC , 8kHz sampling rate
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Automatic gain control (AGC)
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Low power consumption
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Wide battery supply range 1.0V 5.5V
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Standard I2S interface
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Audio sampling rates: 8, 11.025, 12, 16, 22.05, 24, 32,
44.1, and 48 kHz
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I2C control interface
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USB 1.1 front-end
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49 Pin BGA Package
Applications
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Audio frontend for cellular phones
-
Stand alone MP3 player
-
CD and DVD player
-
PDAs
Analog Voice Codec
AS14889
PRELIMINARY DATA SHEET
Analog Audio Front-End
AS3510
PRODUCT BRIEF
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