AS3510 Audio Front-end for Mobile Music0 pages

Preliminary Datasheet AS3510

Analog Audio Front-End
Analog Voice Codec
AS3510
AS14889

DATA SHEET
PRELIMINARY DATA SHEET
CONFIDENTIAL

General Description

Key Features

The AS3510 combines high flexibility and outstanding
performance for analog audio front-end solutions.

On chip DCDC Converter

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.

4 On-chip high performance voltage regulators
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An additional audio power amplifier can directly drive

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external headphones or small 4Ω 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%.

18 Bit stereo DAC

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.

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1.0 to 5.5V input voltage range
Digital Supply, 2.9V
Analog Supply, 2.9V
Core Supply, 1.5 to 2.5V
USB Transceiver Supply, 3.2V
Dynamic range >95 dB
THD < -85dB
De-emphasis for 32 kHz, 44.1 kHz and 48 kHz

Stereo power audio amplifier
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Max. 2x 0.5W @ 4Ω
Analog volume control –39dB to +3dB, 3dB steps
including mute)
Click- and pop-less startup and power down
Auxiliary inputs for additional audio sources

Microphone input
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14 Bit Σ∆−ADC , 8kHz sampling rate
Automatic gain control (AGC)
Low power consumption
Wide battery supply range 1.0V – 5.5V
Standard I2S interface
Audio sampling rates: 8, 11.025, 12, 16, 22.05, 24, 32,
44.1, and 48 kHz
I2C control interface
USB 1.1 front-end
49 Pin BGA Package

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.

Applications

The current consumption is very low and makes the chip
ideally for battery powered devices.

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Rev. 1v2, June 2004

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CONFIDENTIAL

Audio frontend for cellular phones
Stand alone MP3 player
CD and DVD player
PDAs

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