Overview
The AD766AN, produced by Analog Devices Inc., is a 16-bit current-steering Digital-to-Analog Converter (DAC) designed for high-performance applications. It features a direct, three-wire interface to the serial ports of popular Digital Signal Processors (DSPs) such as the ADSP-2101, TMS320CXX, and DSP56001, eliminating the need for additional 'glue logic.' The AD766AN integrates on-chip serial-to-parallel input format conversion, a 16-bit current-steering DAC, a voltage reference, and a voltage output op-amp. Fabricated in Analog Devices' BiMOS II mixed-signal process, this DAC offers superior analog performance and precision.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 16-bit | |
| Signal-to-Noise Ratio (SNR) | 94 dB (to 20 kHz), 79 dB (to 250 kHz) | dB |
| Total Harmonic Distortion (THD) | < −81 dB (at 1 kHz) | dB |
| Output Voltage Range | ±3 V | V |
| Power Supply Range | ±5 V to ±12 V | V |
| Power Dissipation | 120 mW (±5 V), 300 mW (±12 V) | mW |
| Operating Temperature Range | 0°C to +70°C (Commercial), −40°C to +85°C (Industrial), −55°C to +125°C (Military) | °C |
| Package Type | 16-pin plastic DIP (Commercial/Industrial), 16-pin ceramic DIP (Military) | |
| Interface | Serial (SPI compatible) | |
| Settling Time | 1.5 μs (Typical) | μs |
Key Features
- Direct three-wire interface to popular DSP processors without additional 'glue logic.'
- On-chip serial-to-parallel input format conversion.
- 16-bit current-steering DAC with voltage reference and voltage output op-amp.
- High slew rate, small glitch, and fast settling output amplifier.
- Short circuit protection for the output amplifier.
- Separate analog and digital ground pins and power supplies to reduce digital crosstalk.
- Internal bandgap reference for stable voltage source.
- Optional linearity trim pin for improved THD with small signals.
Applications
The AD766AN is suitable for various high-performance applications requiring precise digital-to-analog conversion. These include:
- Digital signal processing systems.
- Audio and video equipment.
- Medical imaging and diagnostic equipment.
- Industrial control systems.
- Aerospace and defense systems.
Q & A
- What is the resolution of the AD766AN DAC?
The AD766AN has a resolution of 16 bits. - What is the signal-to-noise ratio (SNR) of the AD766AN?
The SNR is 94 dB up to 20 kHz and 79 dB up to 250 kHz. - What is the total harmonic distortion (THD) of the AD766AN?
The THD is less than −81 dB at 1 kHz. - What is the output voltage range of the AD766AN?
The output voltage range is ±3 V. - What are the power supply requirements for the AD766AN?
The AD766AN operates over a ±5 V to ±12 V power supply range. - How much power does the AD766AN typically dissipate?
The power dissipation is typically 120 mW with ±5 V supplies and 300 mW with ±12 V supplies. - What are the operating temperature ranges for the AD766AN?
The operating temperature ranges are 0°C to +70°C (Commercial), −40°C to +85°C (Industrial), and −55°C to +125°C (Military). - What type of interface does the AD766AN use?
The AD766AN uses a serial interface compatible with SPI. - What is the settling time of the AD766AN?
The settling time is typically 1.5 μs. - Does the AD766AN have any protection features for the output amplifier?
Yes, the output amplifier is short circuit protected and can withstand indefinite shorts to ground.
