Overview
The AD73322LARUZ-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 notable for its high signal-to-noise ratio of 78 dB over a voice-band signal bandwidth and includes an input-to-output gain network in both the analog and digital domains. This makes it suitable for various applications such as low bit rate, high quality compression, speech enhancement, recognition, and synthesis.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Operating Temperature Range | -40°C | +85°C | A grade | ||
| Supply Voltage (AVDD, DVDD) | 3 V - 10% | 3 V | 3 V + 10% | V | |
| Sampling Rate | 8 kHz | 64 kHz | Programmable from a master clock of 16.384 MHz | ||
| Signal-to-Noise Ratio | 78 dB | Over voice-band signal bandwidth | |||
| Input Gain Range (A/D) | 38 dB | Programmable | |||
| Output Gain Range (D/A) | 21 dB | Programmable | |||
| Group Delay | 25 µs | 50 µs | Interpolator bypassed | ||
| Load Resistance (Single-Ended) | 150 Ω | Ω | |||
| Load Capacitance (Single-Ended) | 500 pF | ||||
| Package Types | 28-lead SOIC, 28-lead TSSOP, 44-lead LQFP |
Key Features
- Dual 16-bit A/D and D/A conversion channels with 78 dB signal-to-noise ratio over voice-band signal bandwidth.
- Programmable input/output gains in both analog and digital domains (38 dB for A/D, 21 dB for D/A).
- On-chip reference voltage allowing single-supply operation.
- Programmable sampling rates (8 kHz, 16 kHz, 32 kHz, 64 kHz) from a master clock of 16.384 MHz.
- Serial port (SPORT) for easy interfacing with industry-standard DSP engines.
- Low group delay suitable for single or multichannel active control applications.
Applications
The AD73322LARUZ-REEL is particularly suited for various applications in the speech and telephony area, including:
- Low bit rate, high quality compression
- Speech enhancement
- Speech recognition
- Speech synthesis
- Subscriber line interface circuits (SLICs)
- Single or multichannel active control applications
Q & A
- What is the AD73322LARUZ-REEL used for? The AD73322LARUZ-REEL is a dual front-end processor used for general-purpose applications, particularly in speech and telephony.
- What are the key conversion channels of the AD73322LARUZ-REEL? It features two 16-bit A/D conversion channels and two 16-bit D/A conversion channels.
- What is the signal-to-noise ratio of the AD73322LARUZ-REEL? The signal-to-noise ratio is 78 dB over a voice-band signal bandwidth.
- What are the programmable sampling rates of the AD73322LARUZ-REEL? The sampling rates are programmable at 8 kHz, 16 kHz, 32 kHz, and 64 kHz from a master clock of 16.384 MHz.
- What types of packages are available for the AD73322LARUZ-REEL? It is available in 28-lead SOIC, 28-lead TSSOP, and 44-lead LQFP packages.
- What is the operating temperature range of the AD73322LARUZ-REEL? The operating temperature range is -40°C to +85°C for the A grade.
- Does the AD73322LARUZ-REEL support single-supply operation? Yes, it supports single-supply operation with an on-chip reference voltage.
- What is the purpose of the SPORT interface in the AD73322LARUZ-REEL? The SPORT interface allows easy interfacing with industry-standard DSP engines.
- What are some typical applications of the AD73322LARUZ-REEL? Typical applications include low bit rate compression, speech enhancement, recognition, synthesis, and subscriber line interface circuits (SLICs).
- What is the group delay characteristic of the AD73322LARUZ-REEL? The group delay is 25 µs when the interpolator is bypassed and 50 µs otherwise.
