Overview
The AD1851RZ, manufactured by Analog Devices Inc., is a high-performance, 16-bit monolithic PCM (Pulse Code Modulation) audio digital-to-analog converter (DAC). This device is part of the AD1851/AD1861 series, where the AD1851 is a 16-bit DAC and the AD1861 is an 18-bit DAC. The AD1851RZ is designed to provide high-quality audio playback with its integrated voltage output amplifier, DAC, serial-to-parallel register, and voltage reference. The combination of CMOS logic elements, bipolar and MOS devices, and thin-film resistors ensures low total harmonic distortion and high signal-to-noise ratio (SNR), making it suitable for demanding audio applications.
Key Specifications
| Specification | Value | Units |
|---|---|---|
| Resolution | 16 bits | |
| Signal-to-Noise Ratio (SNR) | 110 dB | |
| Total Harmonic Distortion + Noise (THD+N) | 0.008% | |
| Output Voltage | ±3 V | |
| Output Current | ±1 mA | |
| Power Supply | ±5 V | |
| Power Dissipation | 100 mW | |
| Operating Temperature | -25°C to +70°C | |
| Package Type | 16-pin SOIC | |
| Maximum Clock Input Frequency | 12.5 MHz |
Key Features
- High-performance audio playback with low total harmonic distortion and high SNR.
- Optional trim allows for super-linear performance and elimination of residual differential linearity error.
- Fast settling time and high slew rates, enabling support for 2x, 4x, 8x, and 16x oversampling rates.
- No external components required for operation.
- Pin-compatible with AD1856 and AD1860 PCM audio DACs.
- Separate analog and digital ground pins to reduce digital crosstalk.
- Laser-trimming of linearity error for low output distortion.
- Short circuit protection for the output amplifier.
Applications
- High-end compact disc players.
- Digital audio amplifiers.
- DAT (Digital Audio Tape) recorders and players.
- Synthesizers and keyboards.
- Professional audio equipment such as audio mixing consoles, studio monitors, and digital audio workstations (DAWs).
Q & A
- What is the resolution of the AD1851RZ?
The AD1851RZ has a resolution of 16 bits.
- What is the signal-to-noise ratio (SNR) of the AD1851RZ?
The SNR of the AD1851RZ is 110 dB.
- What are the output voltage and current capabilities of the AD1851RZ?
The AD1851RZ can provide an output voltage of ±3 V and an output current of ±1 mA.
- What is the power supply requirement for the AD1851RZ?
The AD1851RZ operates with ±5 V power supplies.
- What is the maximum clock input frequency for the AD1851RZ?
The maximum clock input frequency for the AD1851RZ is 12.5 MHz.
- Is the AD1851RZ pin-compatible with other Analog Devices DACs?
Yes, the AD1851RZ is pin-compatible with the AD1856 and AD1860 PCM audio DACs.
- What are the operating temperature ranges for the AD1851RZ?
The AD1851RZ operates over a temperature range of -25°C to +70°C.
- Does the AD1851RZ require external components for operation?
No, the AD1851RZ does not require any external components for operation.
- What is the power dissipation of the AD1851RZ?
The power dissipation of the AD1851RZ is 100 mW.
- How does the AD1851RZ handle linearity error?
The AD1851RZ uses laser-trimming of the linearity error to achieve low total harmonic distortion and high linearity.
