Overview
The AD73322AST, produced by Analog Devices Inc., is a dual, front-end processor designed for general-purpose applications, including speech and telephony. This component features two 16-bit A/D conversion channels and two 16-bit D/A conversion channels, making it suitable for a wide range of audio processing tasks. The AD73322AST operates on a single supply voltage ranging from 2.7 V to 5.5 V, with the L version specifically designed for 3 V operation. It includes programmable input/output gains and an on-chip reference voltage, enabling single-supply operation and flexible integration into various systems.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Number of Channels | 4 | - | 2 A/D and 2 D/A channels |
| Number of Bits | 16 | - | For both A/D and D/A converters |
| ADC SNR | 75 dB | - | Signal-to-noise ratio over voiceband signal bandwidth |
| DAC SNR | 70 dB | - | Signal-to-noise ratio over voiceband signal bandwidth |
| Maximum Sample Rate | 64 ksps | - | Programmable sampling rates: 64, 32, 16, 8 ksps |
| Crosstalk | -90 dB | - | Coupling of signals between channels |
| Group Delay | 25 µs (ADC), 50 µs (DAC) | - | Low group delay per channel |
| Supply Voltage | 2.7 V to 5.5 V | - | Single supply operation |
| Power Dissipation | 50 mW (max at 2.7 V) | - | Low power consumption |
| Operating Temperature | -40°C to +85°C (A grade), -40°C to +105°C (Y grade) | - | Wide operating temperature range |
| Package Types | 28-lead SOIC, 28-lead TSSOP, 44-lead LQFP | - | Variety of package options |
Key Features
- Programmable input/output gains with ranges of 38 dB and 21 dB respectively.
- On-chip reference voltage for single-supply operation.
- Flexible serial port (SPORT) allowing up to 4 codecs to be connected in cascade for up to 8 I/O channels.
- Low group delay: 25 µs per ADC channel and 50 µs per DAC channel.
- Input-to-output gain network in both analog and digital domains for impedance matching or scaling.
- Programmable sampling rates: 64, 32, 16, and 8 ksps from a master clock of 16.384 MHz.
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 AD73322AST used for? The AD73322AST is used for general-purpose applications including speech and telephony, featuring dual 16-bit A/D and D/A conversion channels.
- What are the key specifications of the AD73322AST? Key specifications include 16-bit A/D and D/A converters, programmable input/output gains, 75 dB ADC SNR, 70 dB DAC SNR, and a maximum sample rate of 64 ksps.
- What is the operating voltage range of the AD73322AST? The AD73322AST operates on a single supply voltage ranging from 2.7 V to 5.5 V.
- What are the package options for the AD73322AST? The component is available in 28-lead SOIC, 28-lead TSSOP, and 44-lead LQFP packages.
- What is the group delay of the AD73322AST? The group delay is 25 µs per ADC channel and 50 µs per DAC channel.
- Can the AD73322AST be cascaded with other devices? Yes, the flexible serial port (SPORT) allows up to 4 codecs to be connected in cascade, providing up to 8 I/O channels.
- What are the programmable sampling rates of the AD73322AST? The sampling rates are programmable with four separate settings: 64, 32, 16, and 8 ksps from a master clock of 16.384 MHz.
- What is the power dissipation of the AD73322AST? The maximum power dissipation is 50 mW at 2.7 V.
- What are the typical applications of the AD73322AST? Typical applications include speech processing, telephony, cordless and personal communications, active control of sound and vibration, and data communications.
- What is the operating temperature range of the AD73322AST? The operating temperature range is -40°C to +85°C (A grade) and -40°C to +105°C (Y grade).
