Overview
The AD1895AYRS, produced by Analog Devices Inc., is a 24-bit, high-performance, single-chip, second-generation asynchronous sample rate converter. Building on the experience from the first family of asynchronous sample rate converters (the AD1890 to AD1893), the AD1895 offers improved performance and additional features. It is designed to convert sample rates asynchronously between the serial input and output ports, supporting various serial formats and offering enhanced jitter rejection and dynamic range.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 24-bit | |
| Sample Rate | Up to 192 kHz | |
| THD + N | -115 dB to -122 dB | |
| Dynamic Range | 128 dB (A-Weighted, 20 Hz to 20 kHz BW) | |
| Upsampling/Downsampling Ratios | 1:8 upsampling, 7.75:1 downsampling | |
| Supply Voltages | VDD_CORE: 3.3 V, VDD_IO: 3.3 V to 5 V | V |
| Operating Temperature | -40°C to +105°C | °C |
| Package | 28-Lead SSOP |
Key Features
- Supports left-justified, I2S, and right-justified (16-, 18-, 20-, 24-bit) serial formats
- TDM mode for daisy-chaining multiple AD1895s to a digital signal processor
- Bypass mode for direct pass-through of input data
- Master/Slave input and output modes
- Hardware controllable soft mute
- Linear phase FIR filter
- Flexible 3-wire serial data port
Applications
- Home Theater Systems
- Automotive Audio Systems
- DVD, DVD-R, CD-R
- Set-Top Boxes
- Digital Audio Effects Processors
Q & A
- What is the primary function of the AD1895AYRS?
The AD1895AYRS is a 24-bit, high-performance, asynchronous sample rate converter that converts sample rates asynchronously between the serial input and output ports. - What are the supported serial formats?
The AD1895AYRS supports left-justified, I2S, and right-justified (16-, 18-, 20-, 24-bit) serial formats. - What is the maximum sample rate supported by the AD1895AYRS?
The AD1895AYRS supports sample rates up to 192 kHz for both input and output. - What is the dynamic range of the AD1895AYRS?
The dynamic range is 128 dB (A-Weighted, 20 Hz to 20 kHz BW). - Can the AD1895AYRS be used in TDM mode?
Yes, the AD1895AYRS supports TDM mode for daisy-chaining multiple devices to a digital signal processor. - What are the supply voltage requirements for the AD1895AYRS?
The supply voltages are VDD_CORE: 3.3 V and VDD_IO: 3.3 V to 5 V. - What is the operating temperature range for the AD1895AYRS?
The operating temperature range is -40°C to +105°C. - What package type is the AD1895AYRS available in?
The AD1895AYRS is available in a 28-Lead SSOP package. - What are some common applications of the AD1895AYRS?
Common applications include home theater systems, automotive audio systems, DVD, DVD-R, CD-R, set-top boxes, and digital audio effects processors. - Does the AD1895AYRS have a bypass mode?
Yes, the AD1895AYRS has a bypass mode for direct pass-through of input data.
