Overview
The AD1865R-J is a high-performance, dual 18-bit digital-to-analog converter (DAC) produced by Analog Devices Inc. This integrated circuit is designed to offer excellent Total Harmonic Distortion plus Noise (THD+N) and Signal-to-Noise Ratio (SNR) without the need for external components. The AD1865R-J features two complete signal channels, providing cophased voltage or current output signals and eliminating the need for output demultiplexing circuitry. It is fabricated using Analog Devices' ABCMOS process, which includes CMOS logic elements, bipolar and MOS linear elements, and laser-trimmed thin-film resistor elements.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 18 bits |
| Number of Channels | Dual |
| Output Type | Voltage or Current |
| Output Range (Current Mode) | ±1 mA |
| Output Range (Voltage Mode) | ±3 V at load currents up to 8 mA |
| Power Supplies | ±5 V |
| Power Dissipation | Typically 225 mW, maximum 260 mW |
| Operating Temperature Range | -25°C to +70°C |
| Package Type | 28-pin SOIC |
| Digital Interface | Serial input with Data Left, Data Right, Latch Left, Latch Right, and Clock signals |
Key Features
- Excellent THD+N and SNR performance without external components.
- Partially segmented architecture with laser-trimmed resistors to minimize errors at major code transitions and reduce output glitch.
- High-performance output amplifiers with fast settling and high slew rate, capable of producing ±3 V signals at load currents up to 8 mA.
- Short-circuit protected output amplifiers that can withstand indefinite short circuits to ground.
- High channel separation and matched gain and linearity for optimal performance in stereo and multi-DAC per channel applications.
- Versatile digital interface compatible with standard digital filter chips.
- Separate analog and digital ground pins and power supplies to reduce digital feedthrough.
Applications
The AD1865R-J is suitable for a variety of high-performance audio applications, including:
- Audiophile-grade audio equipment
- Professional audio systems
- High-end consumer audio devices
- Multi-channel audio systems
- Audio signal processing and conversion in various industrial and commercial settings
Q & A
- What is the resolution of the AD1865R-J DAC?
The AD1865R-J has a resolution of 18 bits.
- How many channels does the AD1865R-J support?
The AD1865R-J is a dual-channel DAC.
- What are the output types of the AD1865R-J?
The AD1865R-J can provide both voltage and current outputs.
- What is the typical power dissipation of the AD1865R-J?
The typical power dissipation is 225 mW, with a maximum of 260 mW.
- What is the operating temperature range of the AD1865R-J?
The operating temperature range is -25°C to +70°C.
- What type of package is the AD1865R-J available in?
The AD1865R-J is available in a 28-pin SOIC package.
- Does the AD1865R-J require external components for operation?
No, the AD1865R-J does not require external components for operation.
- How does the AD1865R-J minimize output glitch?
The AD1865R-J uses a partially segmented architecture with laser-trimmed resistors to minimize errors at major code transitions and reduce output glitch.
- What is the significance of the separate analog and digital ground pins and power supplies?
The separate analog and digital ground pins and power supplies help reduce digital feedthrough and improve overall performance.
- Can the AD1865R-J be used in stereo and multi-DAC per channel applications?
