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Electronics Buyers' Guide

Electronics Manufacturing & Production Handbook 2019


 

Class D speaker amplifiers
13 June 2018, Analogue, Mixed Signal, LSI

With the MAX98357 and MAX98358 digital-input Class D audio power amplifiers by Maxim Integrated Products, designers can achieve high efficiency in a compact, cost-efficient solution. Despite their ultra-small form factors, these amplifiers deliver 3,2 W of Class AB audio performance for enhanced audio quality and are ideal for a wide variety of applications.

Traditionally, electronics designers use analog amplifiers requiring a digital-to-analog converter (DAC) and line driver amplifier on the application processor. This adds overall die cost to the speaker output and affects the form factor of the overall solution size.

The MAX98357 pulse-code modulation (PCM) and MAX98358 pulse-density modulation (PDM) speaker amplifiers reduce overall solution size by taking advantage of Maxim’s clever pin-out and by significantly reducing the number of required components compared to typical analog amplifier designs.

Since most customers control their volume digitally upstream, these features enable customers to take advantage of wafer-level packaging without the need for expensive vertical interconnect access (VIAs). The ICs feature a digital input for noise immunity, along with high jitter tolerance and excellent electromagnetic interference (EMI) performance allowing the use of longer traces to the speakers without added external filtering.

To simplify design, the chips only require users to connect a single power supply and feed the bit clock (BCLK) and left-right clock (LRCLK), without needing a master clock (MCLK). These amplifiers further simplify designs by auto-configuring for up to 35 different clocking configurations and 128 different digital audio formats. This automatic configuration eliminates complicated I²C programming as there is no need to rewrite base code to configure a design just to add audio functionality.

As more applications (such as smart speakers) start requiring multi-directional/channel audio, the need for amplifiers like the MAX98357 and MAX98358 that can be easily daisy-chained to support speaker arrays (up to 8 channels supported by time division multiplex) will continue to grow.

For more information contact CST Electronics, +27 11 608 0070, sales@cstelectronics.co.za, www.cstelectronics.co.za


Credit(s)
Supplied By: CST Electronics
Tel: +27 11 608 0070
Fax: +27 11 608 0401
Email: sbennideen@cstelectronics.co.za
www: www.cstelectronics.co.za
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Further reading:

  • Time-to-digital converter
    29 May 2019, Future Electronics, Analogue, Mixed Signal, LSI
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    30 April 2019, Electrocomp, Analogue, Mixed Signal, LSI
    Thanks to new energy standards and better insulation, buildings have become increasingly energy efficient, but at the cost of accelerated deterioration in air quality. Since high CO2 levels compromise ...
  • Time-to-digital converter
    30 April 2019, Analogue, Mixed Signal, LSI
    ams has introduced the AS6500, a new high-resolution time-to-digital converter (TDC) featuring CMOS inputs and compact packaging for use in space- and cost-constrained applications. It can measure time ...
  • USB-C buck charger
    30 April 2019, CST Electronics, Power Electronics / Power Management
    Designers of portable Li-ion battery-powered electronics can add a USB Type-C (USB-C) charging system to their products with the MAX77860 3A switch-mode charger from Maxim Integrated Products. The device ...
  • Phase-locked oscillator
    27 March 2019, Accutronics, Analogue, Mixed Signal, LSI
    L3 Narda-MITEQ released a new cost-effective phase-locked oscillator with an extended frequency range. The 2LPL series comes in a 51 x 51 x 15 mm housing, has an operating temperature from -40°C to + ...
  • Microwave up- and down-converter
    27 March 2019, Altron Arrow, Telecoms, Datacoms, Wireless, IoT, Analogue, Mixed Signal, LSI
    Analog Devices’ ADMV1013 and ADMV1014 are a paired microwave up- and down-converter, respectively. They operate over a very wide frequency range with 50 Ω matching from 24 GHz up to 44 GHz, facilitating ...

 
 
         
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