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

Audio CODECs

Data Sheets

Document	note
AD73311: Low Cost, Low Power CMOS General Purpose Analog Front End Data Sheet (Rev. B)	PDF 334 kB

Application Notes

Document	note
AN-327: DAC ICs: How Many Bits Is Enough?	PDF 345 kB
AN-211: The Alexander Current-Feedback Audio Power Amplifier	PDF 1154 kB

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
AD73311AR Obsolete	20 ld SOIC - Wide	OTH 37		0	0	N
AD73311AR-REEL Obsolete	20 ld SOIC - Wide	REEL 1000		0	0	N
AD73311ARS Obsolete	20 ld SSOP	OTH 66		0	0	N
AD73311ARS-REEL Obsolete	20 ld SSOP	REEL 1500		0	0	N
AD73311ARSZ Production	20 ld SSOP	OTH 66	-40 to 85C	4.61	4.17	Y
AD73311ARSZ-REEL Production	20 ld SSOP	REEL 1500	-40 to 85C	0	4.17	Y
AD73311ARZ Production	20 ld SOIC - Wide	OTH 37	-40 to 85C	4.61	4.17	Y
AD73311ARZ-REEL Production	20 ld SOIC - Wide	REEL 1000	-40 to 85C	0	4.17	Y