Overview
The AD766JN, produced by Analog Devices Inc., is a 16-bit Digital-to-Analog Converter (DAC) designed for high-performance applications. It is part of the AD766 series, which features a direct, three-wire interface to the serial ports of popular Digital Signal Processing (DSP) processors such as the ADSP-2101, TMS320CXX, and DSP56001. This DAC is fabricated using Analog Devices' BiMOS II mixed-signal process, which integrates bipolar transistors, MOS transistors, and thin-film resistors to ensure precision analog circuits and robust digital logic.
The AD766JN offers a complete solution with on-chip serial-to-parallel input format conversion, a 16-bit current-steering DAC, a voltage reference, and a voltage output operational amplifier. The device is optimized for AC performance, providing a guaranteed signal-to-noise ratio (SNR) of 94 dB up to 20 kHz and 79 dB up to 250 kHz. The total harmonic distortion (THD) is reduced below –81 dB at 1 kHz through laser-trimming of the silicon chromium thin-film resistors.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 16 | Bits | ||
| Signal-to-Noise Ratio (SNR) | 94 | dB (up to 20 kHz) | ||
| Total Harmonic Distortion (THD) | -81 | dB (at 1 kHz) | ||
| Output Voltage Range | ±3 | V | ||
| Power Supply Range | ±5 V to ±12 V | V | ||
| Power Dissipation | 120 mW (±5 V) | 150 mW (±5 V) | 300 mW (±12 V) | mW |
| Operating Temperature Range | -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) |
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 output operational amplifier
- 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 for reduced digital crosstalk
- Internal bandgap reference for stable voltage source over temperature and time
- ESD protection circuitry for high energy discharges and fast, low energy pulses
Applications
- Digital Signal Processing (DSP) systems
- Noise cancellation and radar jamming systems
- Automatic Test Equipment (ATE)
- Precision industrial equipment
- Waveform generation
Q & A
- What is the resolution of the AD766JN DAC?
The AD766JN has a resolution of 16 bits.
- What is the signal-to-noise ratio (SNR) of the AD766JN?
The SNR of the AD766JN is 94 dB up to 20 kHz and 79 dB up to 250 kHz.
- What is the total harmonic distortion (THD) of the AD766JN?
The THD of the AD766JN is below –81 dB at 1 kHz.
- What is the output voltage range of the AD766JN?
The output voltage range of the AD766JN is ±3 V.
- What is the power supply range for the AD766JN?
The AD766JN operates over a power supply range of ±5 V to ±12 V.
- What is the typical power dissipation of the AD766JN?
The typical power dissipation is 120 mW with ±5 V supplies and 300 mW with ±12 V supplies.
- What are the operating temperature ranges for the AD766JN?
The operating temperature ranges are -40°C to +85°C for industrial grade and -55°C to +125°C for military grade.
- What type of package is the AD766JN available in?
The AD766JN is available in a 16-pin plastic DIP for commercial and industrial grades, and a 16-pin ceramic DIP for military grade.
- Does the AD766JN have ESD protection?
Yes, the AD766JN features input protection circuitry for ESD protection.
- Can the AD766JN be used with different DSP processors?
Yes, the AD766JN is designed to interface directly with popular DSP processors such as the ADSP-2101, TMS320CXX, and DSP56001.
