Overview
The AD1851R, produced by Analog Devices Inc., is a 16-bit monolithic PCM (Pulse Code Modulation) audio digital-to-analog converter (DAC). This device is part of the AD1851/AD1861 family, where the AD1851 is a 16-bit DAC and the AD1861 is an 18-bit DAC. The AD1851R integrates a voltage output amplifier, a DAC, a serial-to-parallel register, and a voltage reference, making it a complete solution for high-performance audio playback.
The device is fabricated using Analog Devices’ 2 µm ABCMOS process for the digital portion and bipolar and MOS devices along with thin-film resistors for the analog portion. This combination ensures low total harmonic distortion and high linearity, making it suitable for various audio applications.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 16 | - | - | Bits |
| Dynamic Range | - | - | 96 | dB |
| Total Harmonic Distortion + Noise | 0.004 | 0.008 | - | % |
| Signal-to-Noise Ratio | - | - | 107-110 | dB |
| Maximum Clock Input Frequency | - | - | 12.5 | MHz |
| Power Supply Voltage | ±4.75 | ±5 | ±5.25 | V |
| Power Dissipation | - | 100 | - | mW |
| Output Voltage Range | - | - | ±3 | V |
| Output Current Range | - | - | ±1 | mA |
| Operating Temperature Range | -25 | - | 70 | °C |
| Package Type | - | - | 16-Pin Plastic DIP, 16-Pin SOIC | - |
Key Features
- No external components required for operation.
- Optional trim allows super-linear performance.
- Operates with ±5 V power supplies.
- Space-saving 16-pin SOIC and plastic DIP packages.
- Pin-compatible with AD1856 & AD1860 PCM audio DACs.
- High input clock data rates and fast settling time permit 2x, 4x, 8x, and 16x oversampling.
- ±3 V or ±1 mA output capability.
- THD + Noise and SNR are 100% tested.
- Separate analog and digital ground pins for reduced digital crosstalk.
- Laser-trimming of the linearity error for low total harmonic distortion.
Applications
- High-end compact disc players.
- Digital audio amplifiers.
- DAT recorders and players.
- Synthesizers and keyboards.
Q & A
- What is the resolution of the AD1851R?
The AD1851R has a resolution of 16 bits.
- What is the dynamic range of the AD1851R?
The dynamic range of the AD1851R is 96 dB.
- What is the maximum clock input frequency for the AD1851R?
The maximum clock input frequency for the AD1851R is 12.5 MHz.
- What are the power supply voltage requirements for the AD1851R?
The AD1851R operates with ±4.75 V to ±5.25 V power supplies.
- What is the power dissipation of the AD1851R?
The power dissipation of the AD1851R is typically 100 mW.
- What are the output voltage and current ranges of the AD1851R?
The AD1851R provides an output voltage range of ±3 V and an output current range of ±1 mA.
- What is the operating temperature range of the AD1851R?
The operating temperature range of the AD1851R is from -25°C to +70°C.
- In what packages is the AD1851R available?
The AD1851R is available in 16-pin plastic DIP and SOIC packages.
- Is the AD1851R pin-compatible with other Analog Devices DACs?
Yes, the AD1851R is pin-compatible with AD1856 & AD1860 PCM audio DACs.
- What is the significance of laser-trimming in the AD1851R?
Laser-trimming reduces the linearity error, resulting in low total harmonic distortion and high performance audio playback.
