AD73311 Single-Channel, 3 V and 5 V Front-End Processor for General Purpose Applications Including Speech and Telephony

Linux Driver

The AD73311 and AD73311L are complete front-end processors for general-purpose applications including speech and telephony. They feature a 16-bit A/D conversion channel and a 16-bit D/A conversion channel. Each channel provides 70 dB signal-to-noise ratio over the voiceband signal bandwidth. The AD73311L is a follow-on to the AD73311 with improved on-chip filtering, more sample-rate options and lower cost. The L version operates from 3.0 V only, where as the AD73311 operates from either 3 V or 5 V power supplies.

The gains of the A/D and D/A conversion channels are programmable over 38 dB and 21 dB respectively. An on-chip reference voltage is included to allow single-supply operations. A serial port (SPORT) allows easy interfacing for single or cascaded devices to industry standard DSP engines.

The AD73311 and AD73311L are suitable for a variety of applications in the speech and telephony areas including low-bit rate, high quality compression, speech enhancement, recognition and synthesis. The low group delay characteristic of the part makes it suitable for single or multi-channel active-control applications.

Features and Benefits
  • 16-Bit A/D Converters
  • 16-Bit D/A Converters
  • Programmable Input/Output Sample Rates
  • 75 dB ADC SNR
  • 70 db DAC SNR
  • 64 ksps Maximum Sample Rate
  • -90 db Crosstalk
  • Programmable Input/Output Gain
  • Low group Delay: 
    25 µs per ADC ch
    50 µs per DAC ch
  • Flexible Serial Port Allows Up to 4 Codecs To Be Connected in Cascade Giving 8 I/O Channels
  • Single 2.7 V to 5.5 V Supply Operation
  • 50 mW Max Power Dissipation at 2.7 V
  • Linux Driver
Audio & Video Products
Data Sheets
Documentnote
AD73311: Low Cost, Low Power CMOS General Purpose Analog Front End Data Sheet (Rev. B)PDF 334 kB
Application Notes
Documentnote
AN-327: DAC ICs: How Many Bits Is Enough?PDF 345 kB
AN-211: The Alexander Current-Feedback Audio Power AmplifierPDF 1154 kB
Order Information
Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
AD73311AR Obsolete20 ld SOIC - WideOTH 3700N
AD73311AR-REEL Obsolete20 ld SOIC - WideREEL 100000N
AD73311ARS Obsolete20 ld SSOPOTH 6600N
AD73311ARS-REEL Obsolete20 ld SSOPREEL 150000N
AD73311ARSZ Production20 ld SSOPOTH 66-40 to 85C4.614.17Y
AD73311ARSZ-REEL Production20 ld SSOPREEL 1500-40 to 85C04.17Y
AD73311ARZ Production20 ld SOIC - WideOTH 37-40 to 85C4.614.17Y
AD73311ARZ-REEL Production20 ld SOIC - WideREEL 1000-40 to 85C04.17Y
Reference Materials
AD73311: Low Cost, Low Power CMOS General Purpose Analog Front End Data Sheet (Rev. B) ad73311
AN-327: DAC ICs: How Many Bits Is Enough? ad73311
AN-211: The Alexander Current-Feedback Audio Power Amplifier ad73311
Benchmarking Integrated Audio: Why CPU Usage Alone No Longer Predicts User... ad73311