Overview
The AD1862N is a monolithic 20-bit digital audio Digital-to-Analog Converter (DAC) manufactured by Analog Devices Inc. This device is designed to provide extremely high-performance audio playback, integrating a 20-bit DAC, a 20-bit serial-to-parallel input register, and a voltage reference. The AD1862N utilizes Analog Devices' BiMOS II process for the digital portion and combines bipolar and MOS devices along with thin-film resistors for the analog portion. Advanced design, layout, and packaging techniques minimize stress-induced parametric shifts and ensure low total harmonic distortion, making it ideal for high-fidelity audio applications.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Units |
|---|---|---|---|---|
| Resolution | 20 | - | - | Bits |
| Digital Input High (VIH) | 2.0 | 4.0 | - | V |
| Digital Input Low (VIL) | 0.4 | 0.8 | - | V |
| Maximum Clock Input Frequency | - | 17 | - | MHz |
| Signal-to-Noise Ratio (SNR) | 110 | - | - | dB |
| Total Harmonic Distortion + Noise (THD+N) @ 0 dB | - | 0.0025% | - | % |
| Output Current | - | ±1 | - | mA |
| Operating Temperature Range | -25 | - | 70 | °C |
| Power Dissipation | - | < 300 | - | mW |
| Package Type | - | 16-pin Plastic DIP | - | - |
Key Features
- Ultralow noise performance with a signal-to-noise ratio of 120 dB and total harmonic distortion + noise (THD+N) as low as 0.0016% at 0 dB signal amplitude.
- 20-bit resolution providing 120 dB of dynamic range and ±1 dB gain linearity at -90 dB amplitude.
- Integrated 20-bit DAC, 20-bit serial-to-parallel input register, and voltage reference.
- Digital offset circuit and segmentation circuitry to improve low-level distortion performance.
- Low-stress packaging techniques to minimize stress-induced parametric shifts.
- External noise-reduction capacitors for enhanced noise performance.
- Compatible with second-generation digital filter chips for consumer audio products.
- Separate analog and digital power supplies to reduce digital crosstalk.
Applications
- High-performance compact disc players
- Digital audio amplifiers
- Synthesizer keyboards
- Digital mixing consoles
- High-resolution signal processing
Q & A
- What is the resolution of the AD1862N DAC?
The AD1862N has a 20-bit resolution.
- What is the signal-to-noise ratio (SNR) of the AD1862N?
The SNR of the AD1862N is typically 110 dB, with a maximum of 120 dB under optimal conditions.
- What is the total harmonic distortion + noise (THD+N) of the AD1862N at 0 dB signal amplitude?
The THD+N is typically 0.0025% at 0 dB signal amplitude.
- What is the maximum clock input frequency for the AD1862N?
The maximum clock input frequency is 17 MHz.
- What is the operating temperature range of the AD1862N?
The operating temperature range is -25°C to +70°C.
- What type of package does the AD1862N come in?
The AD1862N is packaged in a 16-pin plastic DIP.
- Does the AD1862N have separate power supplies for analog and digital sections?
- What are some typical applications of the AD1862N?
- How does the AD1862N reduce noise?
- What is the power dissipation of the AD1862N?
