Overview
The AD1890JP, produced by Analog Devices Inc., is a SamplePort Stereo Asynchronous Sample Rate Converter (ASRC) designed to solve sample rate interfacing and compatibility problems in digital audio equipment. This device is particularly suited for 18- and 20-bit professional applications, offering high flexibility and automatic sensing of input and output sample clock frequencies. The AD1890JP operates asynchronously, meaning the frequency and phase relationships between the input and output sample clocks do not need to be related by a simple integer ratio, making it highly versatile for various digital audio systems.
Key Specifications
| Specification | Value | Units |
|---|---|---|
| Input Sample Clock Frequency | 8 kHz to 56 kHz | |
| Output Sample Clock Frequency | 8 kHz to 56 kHz | |
| Input Word Width | 4 to 20 bits | |
| Output Word Width | 24 bits | |
| Power Supply Voltage | 2.7 to 5.5 V | V |
| Current Consumption (VDD = 5.0 V) | 35 to 40 mA | mA |
| Current Consumption (VDD = 3.0 V) | 19 mA | mA |
| Operating Temperature Range | 0°C to +70°C | °C |
| Storage Temperature Range | –40°C to +85°C | °C |
| Package Type | 28-Lead PLCC |
Key Features
- Asynchronous operation: Automatically senses the relationship between input and output sample clock frequencies without the need for explicit selection or programming.
- High flexibility in interfacing: Compatible with various DSP chips, AES/EBU receivers and transmitters, and I2S compatible devices.
- Adjustable settling modes: Slow-settling mode for best signal quality and greatest jitter rejection, and fast-settling mode for rapid real-time sample rate changes.
- Adjustable group delay: Short or long group delay mode to adjust the depth of the FIFO memory.
- Independent data justification: Input and output data can be independently justified to the left/right clock edge or delayed by one bit clock.
Applications
The AD1890JP is widely used in professional digital audio equipment where sample rate conversion is critical. This includes applications such as audio workstations, digital audio recorders, and professional audio interfaces. It is also suitable for use in AES/EBU receivers and transmitters, and in systems requiring high-quality sample rate conversion with flexibility in clocking and data justification.
Q & A
- What is the primary function of the AD1890JP?
The primary function of the AD1890JP is to perform asynchronous sample rate conversion in digital audio equipment. - What are the input and output sample clock frequency ranges for the AD1890JP?
The input and output sample clock frequencies can range from 8 kHz to 56 kHz. - What are the input and output word widths for the AD1890JP?
The input word width is 4 to 20 bits, and the output word width is 24 bits. - What power supply voltage does the AD1890JP operate on?
The AD1890JP operates on a power supply voltage of 2.7 to 5.5 V. - What is the operating temperature range for the AD1890JP?
The operating temperature range is 0°C to +70°C. - What package types are available for the AD1890JP?
The AD1890JP is available in a 28-Lead PLCC package. - Can the AD1890JP be used with different types of digital audio interfaces?
Yes, the AD1890JP is compatible with various DSP chips, AES/EBU receivers and transmitters, and I2S compatible devices. - What are the settling modes available for the AD1890JP?
The AD1890JP has slow-settling and fast-settling modes to adapt to changes in sample clock frequencies. - How does the AD1890JP handle data justification?
The AD1890JP allows input and output data to be independently justified to the left/right clock edge or delayed by one bit clock. - Is the AD1890JP suitable for professional audio applications?
Yes, the AD1890JP is designed for 18- and 20-bit professional audio applications.
