Low Power Mobile Stereo Codec

CS42L73 is a highly integrated, low power smart audio codec that serves as a mobile audio distribution network incorporating two stereo digital/analog converters (DACs) and a stereo ADC with ground centered headphone, line and speaker amplifiers for smartphone and portable applications. Three asynchronous bidirectional serial ports with integrated asynchronous sample rate converters (ASRCs) that accept a wide range of incoming audio sample rates can be used to feed the integrated digital mixing engine, which is the heart of the CS42L73. The engine can simultaneously overlay and distribute digital audio from up to three external sources to any of its integrated audio nodes, giving complete routeability to the mobile system designer.

Application Categories

Mobile Audio Devices

Features

Analog I/O:

  • Stereo high performance ADC
    • 91 dB dynamic range (A-wtd)
    • -85 dB THD+N
  • Dual digital microphone interface
  • Independent MIC bias outputs
  • Stereo DAC to headphone amplifier
    • 94 dB Dynamic range (A-wtd)
    • -81 dB THD+N into 32 Ω
    • Integrated step-down/inverting charge pump
  • Class H amplifier - automatic supply adj.
    • High HP power output at -70/-81 dB THD+N
    • 2 x 17/8.5 mW into 16/32 Ω @ 1.8 V
  • Stereo DAC to line outputs

Stereo High Performance Line Level DAC:

  • 97 dB dynamic range (A-wtd)
  • -86 dB THD+N
  • 1VRMS from a single 1.8V power supply

Mono DAC to Ear Speaker Amplifier:

  • High power output at -70 dB (0.032%) THD+N
  • -45 mW into 16 Ω @ 1.8 V

Mono DAC to Speakerphone Amplifier:

  • High output power at ≤ 1% THD+N
  • -1.18/0.84/0.66 W into 8 Ω @ 5.0/4.2/3.7 V
  • Direct battery-powered operation

Parametric Specifications

DACs 4
ADCs 2
DAC THD+N (dB) -85
ADC THD+N (dB) -85
Sample Rate (kHz) 8-48
Analog Power Supply (V) 1.66-1.94
Supply Current (µA) 0.85-1.4
Package 64 WLCSP;
65 FBGA

Technical Documents

CS42L73 Product Datasheet

Jul 23, 2013, DS882F1 : 5503 Kb

CS42L73 Product Brief

Jun 8, 2010, DS882PB1 : 182 Kb

CS42L73 Product Bulletin

Jun 8, 2010, 823110-0610-PB : 1527 Kb

Applications

More

Comprehensive Solutions