Overview
The AD73322LARU-REEL, produced by Analog Devices Inc., is a dual front-end processor designed for general-purpose applications, particularly in the areas of speech and telephony. This component features two 16-bit analog-to-digital (A/D) conversion channels and two 16-bit digital-to-analog (D/A) conversion channels. It is optimized for low bit rate, high-quality compression, speech enhancement, recognition, and synthesis. The AD73322LARU-REEL is known for its low group delay, making it suitable for single or multichannel active control applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Signal-to-Noise Ratio (SNR) | - | 77 | - | dB | Over voiceband signal bandwidth |
| Group Delay | - | 25 µs | - | - | Per ADC channel |
| Group Delay (DAC) | - | 50 µs | - | - | Per DAC channel |
| Input Resistance at PGA | - | 20 kΩ | - | - | Input amplifiers bypassed |
| Maximum Sample Rate | - | 64 ksps | - | - | Programmable sample rates |
| Power Supply Range | 2.7 V | - | 5.5 V | - | Single supply operation |
| Power Dissipation | - | - | 50 mW | - | |
| Crosstalk | - | -90 dB | - | - | - |
| Package Types | - | 28-lead SOIC, 28-lead TSSOP, 44-lead LQFP | - | - | - |
Key Features
- Two 16-bit A/D conversion channels and two 16-bit D/A conversion channels
- Programmable input/output gains with ranges of 38 dB and 21 dB respectively
- Low group delay of 25 µs per ADC channel and 50 µs per DAC channel
- Flexible serial port (SPORT) allowing easy interfacing to industry-standard DSP engines
- On-chip reference voltage for single supply operation
- Programmable sample rates of 64, 32, 16, and 8 ksps
- Input-to-output gain network in both analog and digital domains for impedance matching or scaling
Applications
- General Purpose Analog I/O
- Speech Processing
- Cordless and Personal Communications
- Telephony
- Active Control of Sound and Vibration
- Data Communications
- Wireless Local Loop
Q & A
- What is the AD73322LARU-REEL used for? The AD73322LARU-REEL is used for general-purpose applications, particularly in speech and telephony, including speech processing, telephony, and active control of sound and vibration.
- How many A/D and D/A conversion channels does the AD73322LARU-REEL have? It features two 16-bit A/D conversion channels and two 16-bit D/A conversion channels.
- What is the signal-to-noise ratio (SNR) of the AD73322LARU-REEL? The SNR is 77 dB over voiceband signal bandwidth.
- What are the programmable sample rates of the AD73322LARU-REEL? The sample rates are programmable to 64, 32, 16, and 8 ksps.
- What is the power supply range of the AD73322LARU-REEL? The power supply range is from 2.7 V to 5.5 V for single supply operation.
- What is the maximum power dissipation of the AD73322LARU-REEL at 2.7 V? The maximum power dissipation is 50 mW at 2.7 V.
- What types of packages are available for the AD73322LARU-REEL? It is available in 28-lead SOIC, 28-lead TSSOP, and 44-lead LQFP packages.
- What is the group delay of the AD73322LARU-REEL? The group delay is 25 µs per ADC channel and 50 µs per DAC channel.
- Does the AD73322LARU-REEL have an on-chip reference voltage? Yes, it includes an on-chip reference voltage for single supply operation.
- Can the AD73322LARU-REEL be cascaded with other devices? Yes, the flexible serial port (SPORT) allows up to four codecs to be connected in cascade, providing up to eight I/O channels.
