AC'97 Audio Codec + Touch Panel Controller

General Description

The ALC5611 is a highly-integrated AC'97 interface audio codec with multiple input/output ports and a 4-wire touch panel controller.

The ALC5611 is designed for mobile computing and communications.

Stereo audio is supported via the AC'97 interface. To reduce component count, the device can connect directly to:

  • A 4-wire touch panel
  • MONO or stereo differential analog inputs
  • Stereo headphone
  • Single-end or BTL MONO output
  • MONO or Stereo Bridge-Tied Load (BTL) speaker

    Multiple analog input and output pins are provided for seamless integration with analog connected wireless communication devices. Differential input/output connections efficiently reduce noise interference, providing better sound quality. Class-AB or Class-D amplifiers are easily swapped via simple register configuration, and the 1 Watt speaker removes the need for an additional amplifier, further cutting both cost and required board area. Additionally, a flexible hardware 5-band equalizer with configurable gain, bandwidth, and center frequency, and enriches the sound experience.

    The ALC5611 operates at supply voltages from 1.8 to 5 Volts. To extend battery life, each section of the device can be powered down individually under software control. Leakage current in maximum power saving state is less than 10uA.

    The ALC5611 is available in a 7x7mm ‘Green’ QFN package, making it ideal for use in handheld portable systems.


  • Single-chip AC'97 Rev 2.2 compatible codec
    • 16-bit DAC SNR 90dB, THD+N -85dB
    • 16-bit ADC SNR 85dB, THD+N -80dB
    • Supports all WinCE variable rates (8kHz, 11.025kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, 48kHz)
  • One analog stereo input (LINE-IN)
  • One analog MONO single-ended or differential input (PHONE and PHONEN input)
  • Stereo, single-ended MONO, or differential analog microphone inputs, with boost pre-amplifiers (+20/+30/+40dB)
  • BTL (Bridge-Tied Load) Max. output with on-chip 1W speaker driver (SPKVDD=5V, 8W load)
  • Stereo headphone output with on-chip 45mW headphone driver (HPVDD=3.3V, 16W load)
  • 25mW SE or 75mW BTL MONO output support (AVDD=3.3V, 32W load)
  • Microphone switch detection
  • Power management and enhanced power saving
  • Supports digital 5 band equalizer (EQ)
  • Supports digital spatial sound and pseudo stereo effect
  • Supports pop noise suppression
  • nternal PLL can receive wide range of clock input (Digital IO power > 2.3V)
  • Digital power supplies from 1.8V to 3.6V, speaker amplifier power supplies from 2.3V to 5V
  • Analog power, headphone power, and touch panel power supplies from 2.3V to 3.6V
  • Resistive touch panel interface
    • Supports 4-wire panel
    • X, Y axis and pressure measurement
    • 12-bit resolution AUX_ADC for battery measurement, DNL<±1 LSB, INL<±2 LSBs
    • Supports pen-down detection in power down mode
  • 48-pin QFN package


  • Tablet PC system/Ultra-Mobile PC (UMPC)
  • GPS/Personal Navigation Device (PND) or Multi-Media phone
  • PDA Phone/Smartphone
  • Personal Media Player (PMP)