Overview
The AD73322LARU, produced by Analog Devices Inc., is a dual front-end processor designed for general-purpose applications, particularly in the fields 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 well-suited for various applications requiring high-quality audio processing, including low bit rate compression, speech enhancement, recognition, and synthesis.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Signal-to-Noise Ratio (ADC) | - | - | 77 dB | - | Over voiceband signal bandwidth |
| Signal-to-Noise Ratio (DAC) | - | - | 70 dB | - | Over voiceband signal bandwidth |
| Sampling Rate | 8 kHz | - | 64 kHz | - | Programmable |
| Input/Output Gain Range (ADC) | - | - | 38 dB | - | Programmable |
| Input/Output Gain Range (DAC) | - | - | 21 dB | - | Programmable |
| Group Delay (ADC) | - | 25 µs | - | - | Interpolator bypassed |
| Group Delay (DAC) | - | 50 µs | - | - | - |
| Power Supply Voltage | 2.7 V | - | 5.5 V | - | Single supply operation |
| Power Dissipation | - | - | 50 mW | - | At 2.7 V |
| Package Options | - | - | - | - | 28-lead SOIC, 44-lead LQFP |
Key Features
- Two 16-bit A/D and two 16-bit D/A conversion channels
- Programmable input/output gains and sampling rates
- On-chip reference voltage for single supply operation
- Low group delay suitable for active control applications
- Flexible serial port (SPORT) for interfacing with DSP engines
- Input-to-output gain network 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 used for? The AD73322LARU 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 have? The AD73322LARU features two 16-bit A/D conversion channels and two 16-bit D/A conversion channels.
- What are the programmable sampling rates of the AD73322LARU? The sampling rates are programmable with four separate settings: 64 kHz, 32 kHz, 16 kHz, and 8 kHz.
- What is the signal-to-noise ratio (SNR) of the ADC and DAC channels? The ADC channels have a SNR of 77 dB, and the DAC channels have a SNR of 70 dB over voiceband signal bandwidth.
- What are the input/output gain ranges for the ADC and DAC channels? The ADC channels have a programmable input gain range of 38 dB, and the DAC channels have a programmable output gain range of 21 dB.
- What is the group delay of the ADC and DAC channels? The group delay for the ADC channels is 25 µs (interpolator bypassed), and for the DAC channels, it is 50 µs.
- What are the power supply voltage and power dissipation specifications? The component operates on a single supply voltage from 2.7 V to 5.5 V and has a maximum power dissipation of 50 mW at 2.7 V.
- In what packages is the AD73322LARU available? The AD73322LARU is available in 28-lead SOIC and 44-lead LQFP packages.
- How does the AD73322LARU interface with DSP engines? The AD73322LARU features a flexible serial port (SPORT) that allows easy interfacing with industry-standard DSP engines.
- What is the purpose of the on-chip reference voltage? The on-chip reference voltage allows for single supply operation and is programmable to accommodate either 3 V or 5 V operation.
