Overview
The AD1890JPZ, produced by Analog Devices Inc., is a fully digital, stereo Asynchronous Sample Rate Converter (ASRC) designed to solve sample rate interfacing and compatibility problems in digital audio equipment. This device is part of the SamplePort series and is specifically intended for 18- and 20-bit professional applications. The AD1890 automatically senses the relationship between the input and output sample clock frequencies, eliminating the need for explicit selection or programming of these frequencies. The device operates over a wide range of sample clock frequencies, from 8 kHz to 56 kHz, with flexible input and output control signals that facilitate interfacing with various DSP chips, AES/EBU receivers and transmitters, and I2S compatible devices.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Supply Voltage (VDD) | 2.7 | 5.0 | 5.5 | V |
| Operating Temperature | 0 | 70 | °C | |
| Input Sample Clock Frequency | 8 kHz | 56 kHz | ||
| Output Sample Clock Frequency | 8 kHz | 56 kHz | ||
| Input Word Width | 4 bits | 20 bits | ||
| Output Word Width | 24 bits | |||
| Dynamic Range (20 Hz to 20 kHz, –60 dB Input) | 120 dB | |||
| Total Harmonic Distortion + Noise (20 Hz to 20 kHz, Full-Scale Input) | –94 dB | |||
| Current Consumption (VDD = 5.0 V) | 35 mA | 40 mA | mA | |
| Power Dissipation (VDD = 5.0 V) | 175 mW | 200 mW | mW |
Key Features
- Asynchronous Sample Rate Conversion: The AD1890JPZ can handle arbitrary frequency and phase relationships between the input and output sample clocks, eliminating the need for explicit selection or programming of these frequencies.
- Flexible Input and Output Control Signals: Allows for interfacing with a variety of DSP chips, AES/EBU receivers and transmitters, and I2S compatible devices.
- High Dynamic Range: Offers a dynamic range of up to 120 dB for 20-bit applications.
- Low Total Harmonic Distortion + Noise: Ensures high-quality audio with THD + N as low as –94 dB.
- Wide Operating Temperature Range: Operates from 0°C to +70°C.
- Multiple Packaging Options: Available in 28-pin PLCC and PDIP packages.
Applications
- Digital Audio Equipment: Ideal for professional audio applications requiring high-quality sample rate conversion.
- AES/EBU Systems: Compatible with AES/EBU receivers and transmitters.
- DSP Systems: Facilitates interfacing with various DSP chips.
- I2S Compatible Devices: Supports I2S (Inter-IC Sound) protocol for audio data transfer.
Q & A
- What is the primary function of the AD1890JPZ?
The AD1890JPZ is a fully digital, stereo Asynchronous Sample Rate Converter (ASRC) designed to solve sample rate interfacing and compatibility problems in digital audio equipment.
- What are the input and output sample clock frequency ranges for the AD1890JPZ?
The input and output sample clock frequencies can nominally range from 8 kHz to 56 kHz.
- What is the dynamic range of the AD1890JPZ?
The dynamic range of the AD1890JPZ is up to 120 dB for 20-bit applications.
- What is the total harmonic distortion + noise (THD + N) of the AD1890JPZ?
The THD + N is as low as –94 dB for full-scale input.
- What are the packaging options for the AD1890JPZ?
The AD1890JPZ is available in 28-pin PLCC and PDIP packages.
- What is the operating temperature range of the AD1890JPZ?
The device operates from 0°C to +70°C.
- Can the AD1890JPZ handle arbitrary sample clock frequencies?
Yes, the AD1890JPZ can handle arbitrary frequency and phase relationships between the input and output sample clocks.
- What types of devices can the AD1890JPZ interface with?
The AD1890JPZ can interface with DSP chips, AES/EBU receivers and transmitters, and I2S compatible devices.
- What is the power supply voltage for the AD1890JPZ?
The power supply voltage is +5.0 V, with a range of 2.7 V to 5.5 V.
- What is the current consumption of the AD1890JPZ?
The current consumption is typically 40 mA at VDD = 5.0 V.
