Overview
The AD73311LARSZ-REEL7, produced by Analog Devices Inc., is a comprehensive front-end processor designed for general-purpose applications, particularly in the domains of speech and telephony. This device features a 16-bit analog-to-digital (A/D) conversion channel and a 16-bit digital-to-analog (D/A) conversion channel. Each channel offers a high signal-to-noise ratio (SNR) of 70 dB over the voiceband signal bandwidth, making it suitable for various audio processing tasks.
The AD73311LARSZ-REEL7 is an enhanced version of the AD73311, with improvements in on-chip filtering, additional sample-rate options, and a lower cost. It operates on a single 3.0 V supply and includes an on-chip reference voltage for single-supply operation. The device also features programmable gains for both A/D and D/A channels and a flexible serial port (SPORT) for easy interfacing with industry-standard DSP engines.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Comments |
|---|---|---|---|---|---|
| Supply Voltage (Analog) | 2.7 | 3.0 | 3.3 | V | Single supply operation |
| Supply Voltage (Digital) | 2.7 | 3.0 | 3.3 | V | Single supply operation |
| ADC Resolution | 16 bits | ||||
| DAC Resolution | 16 bits | ||||
| ADC SNR | 75 dB | Over voiceband signal bandwidth | |||
| DAC SNR | 70 dB | Over voiceband signal bandwidth | |||
| Maximum Sample Rate | 64 ksps | ||||
| Group Delay (ADC) | 25 µs | At 64 kHz input sample rate, interpolator bypassed | |||
| Group Delay (DAC) | 50 µs | ||||
| Power Dissipation | 50 mW | At 2.7 V supply | |||
| Package | 20-SSOP (0.209, 5.30mm Width) | ||||
Key Features
- Programmable Gains: The gains of the A/D and D/A conversion channels are programmable over 38 dB and 21 dB ranges, respectively.
- On-Chip Reference Voltage: Includes an on-chip reference voltage to allow single-supply operation.
- Flexible Serial Port (SPORT): Allows easy interfacing of single or cascaded devices to industry-standard DSP engines, enabling up to 4 codecs to be connected in cascade for 8 I/O channels.
- Low Group Delay: Suitable for single or multi-channel active-control applications due to its low group delay characteristics.
- High SNR: Provides 70 dB SNR for both ADC and DAC channels over the voiceband signal bandwidth.
- Multiple Sample Rates: Programmable input/output sample rates.
- Low Power Consumption: Maximum power dissipation of 50 mW at 2.7 V supply.
Applications
- General Purpose Analog I/O: Suitable for various general-purpose analog input/output applications.
- Speech Processing: Ideal for speech enhancement, recognition, and synthesis.
- Cordless and Personal Communications: Used in cordless phones and personal communication devices.
- Telephony: Applicable in telephony systems for high-quality voice transmission.
- Active Control of Sound and Vibration: Suitable for active control applications due to its low group delay.
- Data Communications: Used in data communication systems requiring high-quality analog front-end processing.
Q & A
- What is the primary function of the AD73311LARSZ-REEL7?
The AD73311LARSZ-REEL7 is a front-end processor for general-purpose applications, including speech and telephony, featuring 16-bit A/D and D/A conversion channels.
- What is the signal-to-noise ratio (SNR) of the ADC and DAC channels?
Both the ADC and DAC channels provide a 70 dB SNR over the voiceband signal bandwidth.
- What are the programmable gain ranges for the A/D and D/A channels?
The gains of the A/D and D/A conversion channels are programmable over 38 dB and 21 dB ranges, respectively.
- What is the maximum sample rate supported by the AD73311LARSZ-REEL7?
The maximum sample rate supported is 64 ksps.
- What is the group delay of the ADC and DAC channels?
The group delay is 25 µs for the ADC channel and 50 µs for the DAC channel.
- What type of package does the AD73311LARSZ-REEL7 come in?
The device is packaged in a 20-SSOP (0.209, 5.30mm Width).
- What is the power supply range for the AD73311LARSZ-REEL7?
The device operates on a single supply voltage ranging from 2.7 V to 3.3 V.
- What are some common applications of the AD73311LARSZ-REEL7?
Common applications include speech processing, cordless and personal communications, telephony, and active control of sound and vibration.
- How does the AD73311LARSZ-REEL7 interface with DSP engines?
The device features a flexible serial port (SPORT) that allows easy interfacing with industry-standard DSP engines, enabling up to 4 codecs to be connected in cascade.
- What is the maximum power dissipation of the AD73311LARSZ-REEL7?
The maximum power dissipation is 50 mW at a 2.7 V supply.
