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ZXCW8100S28 Datasheet(PDF) 2 Page - Zetex Semiconductors

Part No. ZXCW8100S28
Description  32 BIT STEREO DIRECT DRIVE DIGITAL AUDIO AMPLIFIER
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Maker  ZETEX [Zetex Semiconductors]
Homepage  http://www.diodes.com/
Logo ZETEX - Zetex Semiconductors

ZXCW8100S28 Datasheet(HTML) 2 Page - Zetex Semiconductors

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DESCRIPTION
The ZXCW8100 is part of a new generation of stereo
digital audio power amplifier devices. The device
offers a move forward to a new level of performance
not offered by another solution.The ZXCW8100
operates in direct drive mode and can be selected to be
with or without dead time.
Exceptional performance can be achieved with the
ZXCW8100 device in direct drive mode, the dynamic
range is 101dB, the noise floor sits at –125dB and when
driving 1W into 4
THD+N is 0.021%. The device
supports all common digital audio input formats.
Sampling frequencies up to 192kHz are fully
supported, dependant on which sampling frequency is
selected then the device can operate in single, dual or
quad speed modes. In single speed mode, then the
popular 44.1kHz sampling from audio CDs is
oversampled up to 768 times. This results in a master
clock speed of 33MHz. Digital de-emphasis is also
supported as well as mixing and muting according to
the ATAPI CD-ROM standard.
Other key features include user definable digital
control of Volume, Mute, Bass & Treble. The device
also features Zetex unique overload management
system NOVALOAD™. NOVALOAD™ can operate in
several ways to modify either volume, tone or both
with user definable attack and decay rates. There is a
hard mute available as well as a mute with digital
silence, whereby the output stage is set to the
quiescent state.
The device is controlled viaa3wireSPI (Serial
Peripheral Interface) interface from the host system
controller.
Device function control is achieved by
writing an 8-bit control and 64 bit data string to internal
registers within the ZXCW8100 chip. The SPI interface
is bi-directional, allowing the configuration to be read
back as required.
The control bits include a device ID control such that up
to 4 ZXCW8100 devices can be used in any one system.
This means that in 5.1 surround sound systems, three
ZXCW8100 devices can be configured together.
The device provides direct drive Pulse Width
Modulation (PWM) 2 channel stereo outputs which, via
a FET drive interface with an H Bridge output stage,
forms a full solution to Digital Power Amplification.
Reference designs are available for the solutions with
typical power levels up to 60W.
The ZXCW8100 device operates from a 3.3V supply
with an operating temperature range from -40 Cto
+85 C. The device is supplied in a 28 pin SSOP package.
ZXCW8100S28
ISSUE 1 - JULY 2002
2


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