Overview
The AD1896AYRSZ, produced by Analog Devices Inc., is a 24-bit, high-performance, single-chip, second-generation asynchronous sample rate converter. It builds upon the improvements from its predecessor, the AD1890, offering enhanced performance and additional features. This component is designed to convert audio data from one sample rate to another, supporting a wide range of sample rates and serial formats. The AD1896 is particularly notable for its high dynamic range, low total harmonic distortion plus noise (THD+N), and robust jitter rejection capabilities.
Key Specifications
| Parameter | Specification |
|---|---|
| Resolution | 24-bit |
| Sample Rate | Up to 192 kHz for both input and output |
| Dynamic Range | 142 dB (A-Weighted) |
| THD+N | -117 dB to -133 dB depending on sample rate and input frequency |
| Upsampling/Downsampling Ratios | 1:8 up-sampling, 7.75:1 down-sampling |
| Serial Formats | Left-justified, I2S, right-justified (16-, 18-, 20-, 24-bit), TDM mode |
| Operating Supply Voltage | 3.3 V, 5 V input tolerant |
| Package | 28-lead SSOP |
| Operating Supply Current | 43 mA |
| Mounting Type | Surface Mount |
Key Features
- High-performance asynchronous sample rate conversion with improved THD+N and dynamic range.
- Supports various serial formats including left-justified, I2S, and right-justified modes.
- TDM mode for daisy-chaining multiple AD1896s to a digital signal processor.
- Bypass mode for passing non-audio data or synchronous sample rates.
- Matched-phase mode to eliminate phase mismatching between multiple AD1896s.
- Improved jitter rejection and robust interfacing to digital signal processors.
Applications
The AD1896 is suitable for a variety of audio and professional audio equipment applications, including:
- Professional audio systems requiring high-quality sample rate conversion.
- Audio interfaces and converters.
- Studio equipment and recording systems.
- Live sound and public address systems.
- Automotive audio systems.
Q & A
- What is the primary function of the AD1896?
The AD1896 is a 24-bit, high-performance, asynchronous sample rate converter designed to convert audio data from one sample rate to another.
- What are the supported sample rates for the AD1896?
The AD1896 supports sample rates up to 192 kHz for both input and output.
- What is the dynamic range of the AD1896?
The AD1896 has a dynamic range of 142 dB (A-Weighted).
- What are the THD+N specifications for the AD1896?
The THD+N range is -117 dB to -133 dB depending on the sample rate and input frequency.
- What serial formats does the AD1896 support?
The AD1896 supports left-justified, I2S, right-justified (16-, 18-, 20-, 24-bit), and TDM modes.
- Can the AD1896 operate with different supply voltages?
Yes, the AD1896 is 3.3 V and 5 V input tolerant when the VDD_IO supply pin is supplied with 5 V.
- What is the package type of the AD1896?
The AD1896 is available in a 28-lead SSOP package.
- How does the TDM mode work in the AD1896?
In TDM mode, multiple AD1896s can be daisy-chained together and connected to the serial input port of a digital signal processor, allowing for the creation of a large shift register.
- What is the purpose of the bypass mode in the AD1896?
The bypass mode allows the AD1896 to pass non-audio data or synchronous sample rates directly from the input to the output without any dithering.
- How does the matched-phase mode eliminate phase mismatching in the AD1896?
The matched-phase mode ensures that multiple AD1896s can operate with synchronized phases, eliminating phase mismatching by transmitting the f_S_OUT / f_S_IN ratio between devices.
