Overview
The AD1856R, produced by Analog Devices Inc., is a monolithic 16-bit pulse code modulation (PCM) audio digital-to-analog converter (DAC). This device integrates a voltage output amplifier, a 16-bit DAC, a 16-bit serial-to-parallel input register, and a voltage reference. The digital portion is fabricated using CMOS logic elements from Analog Devices’ BiMOS II process, while the analog portion uses bipolar and MOS devices along with thin film resistors. This combination ensures high-performance audio playback with low total harmonic distortion and fast settling times, making it suitable for both portable and home-use audio applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Resolution | 16 bits | |||
| Output Voltage Range | ±3 V | |||
| Power Supply Voltage (+VL, +VS) | 4.75 | 5 | 13.2 | V |
| Power Supply Voltage (−VL, −VS) | −13.2 | −5 | −4.75 | V |
| Power Dissipation (±5 V supplies) | 110 | 150 | mW | |
| Power Dissipation (±12 V supplies) | 135 | mW | ||
| Settling Time | 1.5 µs | |||
| Total Harmonic Distortion (THD) | 0.008% (AD1856RZ), 0.0025% (AD1856RZ-K) | |||
| Dynamic Range | 96 dB | |||
| Operating Temperature Range | 0 | 70 | °C | |
| Storage Temperature Range | −25 | 70 | °C | |
Key Features
- High-performance audio playback with low total harmonic distortion (THD) of 0.008% (AD1856RZ) and 0.0025% (AD1856RZ-K).
- Fast settling time of 1.5 µs, allowing for 2x, 4x, or 8x oversampling.
- ±3 V output capability and ±1 mA current output.
- 16-bit resolution with 2’s complement serial input words.
- Operates with ±5 V to ±12 V power supplies, suitable for both portable and home-use markets.
- Separate analog and digital ground pins and power supplies to reduce digital crosstalk.
- No external components required.
- Optional linearity trim pin for superlinear performance.
- Short-circuit protected output amplifier.
Applications
- Consumer audio products, including CD players, digital audio workstations, and home audio systems.
- Portable audio devices such as MP3 players and portable CD players.
- Professional audio equipment requiring high-quality digital-to-analog conversion.
Q & A
- What is the resolution of the AD1856R DAC?
The AD1856R has a 16-bit resolution.
- What is the output voltage range of the AD1856R?
The output voltage range is ±3 V.
- What are the power supply voltage ranges for the AD1856R?
The device operates with ±5 V to ±12 V power supplies.
- What is the typical power dissipation of the AD1856R with ±5 V supplies?
The typical power dissipation is 110 mW with ±5 V supplies.
- What is the settling time of the AD1856R?
The settling time is 1.5 µs.
- Does the AD1856R require external components?
No, the AD1856R does not require external components.
- What is the total harmonic distortion (THD) of the AD1856RZ and AD1856RZ-K models?
The THD is 0.008% for AD1856RZ and 0.0025% for AD1856RZ-K.
- What is the dynamic range of the AD1856R?
The dynamic range is 96 dB.
- Can the AD1856R operate with separate analog and digital power supplies?
Yes, the device can operate with separate analog and digital power supplies to reduce digital crosstalk.
- Is the output amplifier of the AD1856R short-circuit protected?
Yes, the output amplifier is short-circuit protected.
