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AD73322L:  Dual-Channel, 3 V Front-End Processor for General Purpose Applications Including Speech and Telephony

Product Details

The AD73322 and AD73322L are dual, front-end processor for general-purpose applications including speech and telephony. They feature two 16-bit A/D conversion channels and two 16-bit D/A conversion channels. Each channel provides 77 dB signal-to-noise ratio over a voiceband signal bandwidth. The AD73322 power-supply range includes 3 V and 5 V operation, the L version operates from 3 V only. They also feature an input-to-output gain network in both the analog and digital domains. The networks are on both codecs and can be used for impedance matching or scaling when interfacing to Subscriber Line Interface circuits (SLICs).

The A/D and D/A conversion channels feature programmable input/output gains with ranges of 38 db and 21 dB respectively. An on-chip reference voltage is included to allow single supply operation. This reference is programmable to accommodate either 3 V or 5 V operation.

The sampling rate of the codecs is programmable with four separate settings offering 64, 32, 16 and 8 ksps sampling rates. The master clock is 16.384 MHz.

A serial port (SPORT) allows easy interfacing of single or cascaded devices to industry standard DSP engines. The SPORT transfer rate is programmable to allow interfacing to both fast and slow DSP engines.

The AD73322 and AD73322L are available in 28-lead SOIC and 44-lead LQFP packages.


  • Two 16-Bit A/D Converters
  • Two 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
  • 28-Pin SOIC Package

Functional Block Diagram for AD73322L


Title Content Type File Type
AD73322L: Low Cost, Low Power CMOS General Purpose Dual Analog Front End Data Sheet  (Rev A, 12/2004) (pdf, 1170 kB) Data Sheets PDF
EE-193: Interfacing the ADSP-BF535 Blackfin Processor to the AD73322L Codec  (pdf, 901 kB) Application Notes PDF
AN-327: DAC ICs: How Many Bits Is Enough?  (pdf, 345 kB)
Digital audio playback DACs are available in a variety of different architectures--each with it's own performance tradeoffs.
Application Notes PDF
AN-211: The Alexander Current-Feedback Audio Power Amplifier  (pdf, 1154 kB) Application Notes PDF
Benchmarking Integrated Audio: Why CPU Usage Alone No Longer Predicts User Experience  (pdf, 1052 kB)
(, 2007)
Technical Articles PDF
ASUS P5N32-E SLI Plus: NVIDIA's 650i goes Dual x16  (pdf, 3028 kB)
(AnandTech, 04/02/2007)
Product Reviews PDF
Realtek Audio Codecs Not Rendering True EAX  (pdf, 138 kB)
(DailyTech, 09/26/2006)
Product Reviews PDF
Underneath Microsoft's Universal Audio Architecture  (pdf, 250 kB)
(DailyTech, 01/30/2007)
Product Reviews PDF
Audio Performance  (pdf, 811 kB)
(AnandTech, 10/20/2006)
Product Reviews PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

AD73322L Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
AD73322LARUZ Status: Production 28 ld TSSOP 28 Comm. Tube, 50 $5.37 $4.86 Y  Material Info PCN Purchase Sample
AD73322LARZ Status: Production 28 ld SOIC - Wide 28 Comm. Tube, 27 $5.37 $4.86 Y  Material Info PCN Purchase Sample
AD73322LARZ-REEL Status: Production 28 ld SOIC - Wide 28 Comm. Reel, 1000 - - Y  Material Info PCN Purchase
AD73322LYRUZ Status: Production 28 ld TSSOP 28 Ind Tube, 50 - - Y  Material Info PCN Purchase Sample
AD73322LYRZ Status: Last Time Buy 28 ld SOIC - Wide 28 Ind Tube, 27 $6.18 $5.59 Y  Material Info PCN/PDN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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