Overview
The AD73311AR is a comprehensive, low-cost codec solution developed by Analog Devices Inc. for signal processing applications that demand high performance and low power consumption. This codec integrates a 16-bit analog-to-digital converter (ADC) and a 16-bit digital-to-analog converter (DAC), along with digital signal processing (DSP) capabilities. It is particularly suited for a wide range of audio and voice processing applications, including speech and telephony.
The AD73311AR features programmable input/output gain, a flexible serial port (SPORT) that allows up to eight devices to be connected in cascade, and an on-chip reference voltage for single-supply operation. Its low group delay and high signal-to-noise ratio make it ideal for single or multi-channel active control applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Temperature | -40°C | +85°C | |||
| Supply Voltage | 2.7V | 5.5V | Single supply operation | ||
| ADC Resolution | 16 bits | ||||
| DAC Resolution | 16 bits | ||||
| ADC SNR | 70 dB | Over voiceband signal bandwidth | |||
| DAC SNR | 70 dB | Over voiceband signal bandwidth | |||
| Maximum Sample Rate | 64 ksps | ||||
| Group Delay | 25 µs (ADC), 50 µs (DAC) | ||||
| Crosstalk | -90 dB | ||||
| Power Dissipation | 50 mW (at 2.7V) | ||||
| Package/Case | SOIC-20, SSOP |
Key Features
- 16-bit ADC and 16-bit DAC for high-quality audio conversion
- Programmable input/output gain over 38 dB and 21 dB ranges respectively
- On-chip reference voltage for single-supply operation
- Flexible serial port (SPORT) allowing up to eight devices to be connected in cascade
- Low group delay of 25 µs per ADC channel and 50 µs per DAC channel
- High signal-to-noise ratio (SNR) of 70 dB for both ADC and DAC channels
- Low power consumption with a maximum of 50 mW at 2.7V
- Support for low-bit rate, high-quality compression, speech enhancement, recognition, and synthesis
Applications
- General Purpose Analog I/O
- Speech Processing
- Cordless and Personal Communications
- Telephony
- Active Control of Sound & Vibration
- Data Communications
Q & A
- Q: Can the AD73311AR be used in battery-powered devices?
A: Yes, the AD73311AR is designed for low power consumption, making it suitable for battery-powered devices requiring signal processing capabilities.
- Q: What is the typical operating voltage range for the AD73311AR?
A: The AD73311AR operates from a single +2.7V to +5.5V power supply.
- Q: What are the resolutions of the ADC and DAC channels in the AD73311AR?
A: Both the ADC and DAC channels have a resolution of 16 bits.
- Q: What is the maximum sample rate of the AD73311AR?
A: The maximum sample rate is 64 ksps.
- Q: What is the group delay of the AD73311AR?
A: The group delay is 25 µs for the ADC channel and 50 µs for the DAC channel.
- Q: Does the AD73311AR support cascading multiple devices?
A: Yes, the AD73311AR's flexible serial port (SPORT) allows up to eight devices to be connected in cascade.
- Q: What is the power dissipation of the AD73311AR at 2.7V?
A: The maximum power dissipation at 2.7V is 50 mW.
- Q: What are the typical applications of the AD73311AR?
A: The AD73311AR is suitable for applications such as speech processing, telephony, cordless and personal communications, active control of sound and vibration, and data communications.
- Q: Does the AD73311AR have on-chip filtering capabilities?
A: Yes, the AD73311AR includes an on-board digital filter as part of the sigma-delta ADC, which performs critical system-level filtering.
- Q: What is the signal-to-noise ratio (SNR) of the AD73311AR?
A: The SNR is 70 dB for both the ADC and DAC channels over the voiceband signal bandwidth.
