Overview
The AD1856RZ, 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 AD1856RZ is fabricated using Analog Devices’ BiMOS II process, combining CMOS logic elements with bipolar and MOS devices, as well as thin film resistors. This design ensures high performance audio playback with extremely low total harmonic distortion and fast settling times, making it suitable for both portable and home-use audio applications.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution (Bits) | 16 |
| Number of Channels | 1 |
| Data Interface | Serial |
| Voltage Supply Source | Dual ± |
| Voltage - Supply | ±4.75V ~ 13.2V |
| Operating Temperature | -25°C ~ 70°C |
| Mounting Type | Surface Mount |
| Package / Case | 16-SOIC (0.295", 7.50mm Width) |
| Total Harmonic Distortion (THD) | 0.0025% (AD1856RZ-K), 0.008% (AD1856RZ) |
| Output Voltage Range | ±3 V |
| Output Current Range | ±8 mA |
| Settling Time | 1.5 µs (6 V step), 1.0 µs (1 LSB step) |
| Slew Rate | 9 V/µs |
Key Features
- High performance audio playback with extremely low total harmonic distortion (THD) of 0.0025% for the AD1856RZ-K and 0.008% for the AD1856RZ.
- Fast settling time of 1.5 µs for a 6 V step and 1.0 µs for a 1 LSB step, allowing for 2×, 4×, and 8× oversampling.
- Optional trim feature for superlinear performance and elimination of residual differential linearity error at midscale.
- Operates with ±5 V to ±12 V power supplies, suitable for both portable and home-use markets.
- Serial input interface compatible with popular digital filter chips used in consumer audio products.
- Short-circuit protected output amplifier that can withstand indefinite shorts to ground.
- Separate analog and digital ground pins and supplies to reduce digital crosstalk.
- Low power dissipation of 110 mW (typical) with ±5 V supplies.
Applications
The AD1856RZ is designed for high-quality audio applications, including:
- Consumer audio products such as CD players, DVD players, and home theaters.
- Portable audio devices like MP3 players and handheld audio recorders.
- Professional audio equipment requiring low distortion and high fidelity audio output.
- Audio interfaces and sound cards in computers and other digital systems).
Q & A
- What is the resolution of the AD1856RZ DAC?
The AD1856RZ has a resolution of 16 bits.
- What is the total harmonic distortion (THD) of the AD1856RZ?
The THD is 0.0025% for the AD1856RZ-K and 0.008% for the AD1856RZ.
- What is the output voltage range of the AD1856RZ?
The output voltage range is ±3 V.
- Can the AD1856RZ operate with different power supply voltages?
Yes, it can operate with ±5 V to ±12 V power supplies.
- What is the settling time of the AD1856RZ?
The settling time is 1.5 µs for a 6 V step and 1.0 µs for a 1 LSB step.
- Is the output amplifier of the AD1856RZ short-circuit protected?
Yes, the output amplifier is short-circuit protected and can withstand indefinite shorts to ground.
- What type of data interface does the AD1856RZ use?
The AD1856RZ uses a serial data interface.
- Can the AD1856RZ support oversampling rates?
Yes, it supports 2×, 4×, and 8× oversampling rates.
- What is the package type of the AD1856RZ?
The package type is 16-SOIC (0.295", 7.50mm Width).
- What is the operating temperature range of the AD1856RZ?
The operating temperature range is -25°C to 70°C.
