Overview
The ADAU1702JSTZ-RL, produced by Analog Devices Inc., is a comprehensive single-chip audio system. It integrates a 28-/56-bit audio DSP, two Σ-Δ ADCs, four Σ-Δ DACs, and microcontroller-like control interfaces. This chip is designed to enhance audio quality by compensating for real-world limitations of speakers, amplifiers, and listening environments through advanced signal processing techniques such as equalization, crossover, bass enhancement, multiband dynamics processing, delay compensation, speaker compensation, and stereo image widening. The ADAU1702 is highly programmable, allowing users to configure custom signal processing flows using the SigmaStudio™ software.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| ADC THD + N | -83 | - | - | dB | - |
| DAC THD + N | -90 | - | - | dB | - |
| Analog Input to Analog Output Dynamic Range | 98.5 | - | - | dB | - |
| DVDD Voltage | 1.7 | 1.8 | 1.84 | V | - |
| AVDD Voltage | 2.97 | - | 3.63 | V | - |
| Input Voltage, High (VIH) | 2.0 | - | - | V | IOVDD |
| Input Voltage, Low (VIL) | 0.8 | - | - | V | - |
| Input Leakage, High (IIH) | - | - | 1 | μA | Excluding MCLKI |
| Input Leakage, Low (IIL) | - | - | 1 | μA | Excluding MCLKI and bidirectional pins |
Key Features
- 28-/56-bit audio DSP with 25 MIPS processing core
- Two Σ-Δ ADCs and four Σ-Δ DACs
- Advanced signal processing capabilities including equalization, crossover, bass enhancement, multiband dynamics processing, delay compensation, speaker compensation, and stereo image widening
- On-chip voltage regulator for compatibility with 3.3 V systems
- Digital input and output ports for glueless connection to additional ADCs and DACs
- Communication through I2C bus or 4-wire SPI port
- Programmable using SigmaStudio™ software
- Self-boot mechanism from serial EEPROM or external microcontroller
Applications
- Multimedia speaker systems
- MP3 player speaker docks
- Automotive head units
- Minicomponent stereos
- Digital televisions
- Studio monitors
- Speaker crossovers
- Musical instrument effects processors
- In-seat sound systems (aircraft/motor coaches)
Q & A
- What is the ADAU1702JSTZ-RL?
The ADAU1702JSTZ-RL is a complete single-chip audio system produced by Analog Devices Inc., featuring a 28-/56-bit audio DSP, ADCs, DACs, and microcontroller-like control interfaces.
- What are the key signal processing capabilities of the ADAU1702?
The ADAU1702 supports advanced signal processing techniques such as equalization, crossover, bass enhancement, multiband dynamics processing, delay compensation, speaker compensation, and stereo image widening.
- What is the dynamic range of the analog input to analog output of the ADAU1702?
The ADAU1702 has an analog input to analog output dynamic range of 98.5 dB.
- How does the ADAU1702 communicate with other devices?
The ADAU1702 communicates through an I2C bus or a 4-wire SPI port.
- What software is used to program the ADAU1702?
The ADAU1702 is programmed using the SigmaStudio™ software.
- What are some common applications of the ADAU1702?
The ADAU1702 is used in multimedia speaker systems, MP3 player speaker docks, automotive head units, minicomponent stereos, digital televisions, studio monitors, speaker crossovers, musical instrument effects processors, and in-seat sound systems.
- What is the THD + N of the ADCs and DACs in the ADAU1702?
Each ADC has a THD + N of −83 dB, and each DAC has a THD + N of −90 dB.
- Does the ADAU1702 have an on-chip voltage regulator?
Yes, the ADAU1702 includes an on-chip voltage regulator for compatibility with 3.3 V systems.
- How does the ADAU1702 store and recall program settings?
The ADAU1702 can load programs on power-up from a serial EEPROM through its self-boot mechanism or from an external microcontroller. On power-down, the current state of the parameters can be written back to the EEPROM.
- What is the package type of the ADAU1702JSTZ-RL?
The ADAU1702JSTZ-RL is packaged in a 48-lead LQFP (7mm x 7mm).
