Overview
The AD1857JRS is a high-performance, single-supply, stereo digital-to-analog converter (DAC) from Analog Devices Inc. This device is designed to provide highly accurate and fast conversion of digital audio signals into analog form. It is part of the Sigma-Delta DAC family, known for its high fidelity and robust performance in various audio applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 16-bit, 18-bit, 20-bit |
| Sample Rates | Up to 192 kHz (supports 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz) |
| Modulator Type | Sigma-Delta (Σ-Δ) |
| Power Supply | Single 5 V supply |
| Package | 28-Lead SSOP |
| Operating Temperature | 0°C to 70°C |
| Data Format | MSB first, twos-complement format |
| Serial Data Input | Left-justified, I²S, right-justified, DSP serial port compatible modes |
Key Features
- High-performance Sigma-Delta DAC with multibit architecture for reduced idle tones and noise floor.
- Data-directed scrambling DAC for minimal sensitivity to jitter.
- On-chip stereo attenuator and mute, programmable via SPI-compatible serial control port.
- Supports a wide range of sample rates and is compatible with various audio formats, including DVD and CD.
- Backwards compatible with 50 μs/15 μs digital de-emphasis for Red Book compact discs.
- Simple and flexible serial data input port for glueless interconnection with ADCs, DSP chips, AES/EBU receivers, and sample rate converters.
Applications
- DVD and CD players
- Home Theater Systems
- Automotive audio systems
- Professional audio equipment such as digital mixing consoles and audio effects processors
- Sampling musical keyboards
Q & A
- What is the resolution of the AD1857JRS DAC?
The AD1857JRS supports 16-bit, 18-bit, and 20-bit resolutions. - What are the supported sample rates for the AD1857JRS?
The device supports sample rates up to 192 kHz, including 32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, and 96 kHz. - What type of modulator does the AD1857JRS use?
The AD1857JRS uses a Sigma-Delta (Σ-Δ) modulator. - What is the power supply requirement for the AD1857JRS?
The device operates from a single 5 V power supply. - In what package is the AD1857JRS available?
The AD1857JRS is available in a 28-Lead SSOP package. - What is the operating temperature range for the AD1857JRS?
The operating temperature range is 0°C to 70°C. - How is the serial data input formatted for the AD1857JRS?
The serial data input is in MSB first, twos-complement format and supports left-justified, I²S, right-justified, and DSP serial port compatible modes. - Is the AD1857JRS compatible with DVD and CD formats?
Yes, the AD1857JRS is fully compatible with all known DVD formats and supports 192 kHz and 96 kHz sample frequencies, as well as 50 μs/15 μs digital de-emphasis for Red Book compact discs. - Can the AD1857JRS be used in professional audio equipment?
Yes, the AD1857JRS is suitable for use in professional audio equipment such as digital mixing consoles and audio effects processors. - How is the on-chip stereo attenuator and mute controlled?
The on-chip stereo attenuator and mute are programmable via an SPI-compatible serial control port.
