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

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.

Features and Benefits
  • 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
Audio & Video Products
Analog to Digital Converters
Data Sheets
Documentnote
AD73322L: Low Cost, Low Power CMOS General Purpose Dual Analog Front End Data Sheet (Rev. A)PDF 1170 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
AD73322LARUZ Production28 ld TSSOP (4.4mm)OTH 50-40 to 105C00Y
AD73322LARZ Production28 ld SOIC - WideOTH 27-40 to 105C00Y
AD73322LARZ-REEL Production28 ld SOIC - WideREEL 1000-40 to 105C00Y
AD73322LYRUZ Production28 ld TSSOP (4.4mm)OTH 50-40 to 105C00Y
AD73322LYRZ Obsolete28 ld SOIC - WideOTH 2700Y
Reference Materials
AD73322L: Low Cost, Low Power CMOS General Purpose Dual Analog Front End Data Sheet (Rev. A) ad73322l
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