Product category:
Analogue and Mixed Signal ICs
News Release from: austriamicrosystems | Subject: AS3543
Edited by the Electronicstalk Editorial
Team on 08 January 2008
Analogue companion cuts power for
portable design
Latest integrated audio and power management device combines all system analogue functions required around a digital SoC for mobile entertainment products.
austriamicrosystems has expanded its audio front end portfolio with a new device that achieves unprecedented low power consumption at an exceptionally high audio performance by featuring a sub-7mW stereo DAC at over 100dB SNR The AS3543 is the latest member of a comprehensive family of integrated audio and power management devices that combine in a single chip all system analogue functions required around a digital SoC for mobile entertainment products
This article was originally published on Electronicstalk on 19 Oct 2007 at 8.00am (UK)
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austriamicrosystems and IDS Microchip have collaborated to achieve the low current consumption and low cost bill of materials (BOM) required for the portable reader market.
austriamicrosystems targets versatile single chip companion analogue devices that complement increasingly complex mobile SoC processors saving board space and cost while offering improved performance when compared with discrete components.
The AS3543 is a flexible and highly integrated audio and power management device which includes functions such as low power stereo audio DACs and ADCs with line audio output and input, microphone input, headphone amplifier with direct drive capabilities, battery charging for Li-ion and other popular types, efficient DC/DC step-up/step-down power convertors, LDOs, ultra low power RTC, battery switch and high voltage backlight power unit.
Advanced power management techniques like dynamic voltage with frequency scaling or adjustable DC/DC convertors enable high efficiency over a wide range of current loads.
Further reading
A/D convertors offer low power consumption
The AS1528/29 A/D convertors suit small battery-powered devices and portable data acquisition systems such as remote sensors or pen digitisers.
LDOs are optimised for noise performance
With the choice of 150 or 300mA output current, the ultra-low-noise LDO family delivers sufficient power for a wide range of applications.
Handheld entertainment devices are increasingly docked in a cradle and connected to the speaker system of a car or home speaker accessory where the portable device replaces traditional home or car entertainment hi-fi.
In both scenarios the AS3543 takes advantage of a unique feature to minimise the considerable ground noise generated by the engine in the car or high current switching Class-D amplifier from the speakers dock.
A typical of 3dB SNR gain has been measured at the reproducer by employing this technique.
High performance analogue design expertise is the core competence of austriamicrosystems, still the only semiconductor vendor able to combine high current switching DC/DC convertors and high voltage circuits together with precision high performance audio DAC, ADCs and amplifiers in one single IC.
These integrated products have enabled to date over 100 million of mobile devices.
Roberto Simmarano, Senior Marketing Director Communications at austriamicrosystems, comments: "Our ultimate goal is to simplify the design of portable products".
"The rapid performance increase of portable multimedia SoCs drives the demand for power management based on switching regulators which results in increased design challenges to obtain high performance and low noise audio at the reproducer".
"To address this issue, austriamicrosystems offers innovative, pre-verified and optimised, integrated power management chips".
"High integration leads to the additional benefits of smaller system real estate and total BOM cost reductions - both at a premium in developing new generation, slimmer portable products".
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