Overview
The AD766JNZ is a 16-bit Digital-to-Analog Converter (DAC) produced by Analog Devices Inc. It is part of the DACPORT series, designed to provide 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 for high precision analog circuits and CMOS devices for logic.
The AD766JNZ is optimized for AC performance, offering a guaranteed and tested 94 dB signal-to-noise ratio (SNR) up to 20 kHz and 79 dB SNR up to 250 kHz. It also features laser-trimmed silicon chromium thin-film resistors to reduce total harmonic distortion below -81 dB at 1 kHz.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 16 bits | |||
| Number of D/A Converters | 1 | |||
| Settling Time | 1.5 μs | |||
| Output Type | Voltage - Buffered, Current - Unbuffered | |||
| Package / Case | 16-DIP (0.300", 7.62mm) PDIP-16 | |||
| Analog Supply Voltage | ±4.75 V | ±13.2 V | V | |
| Digital Supply Voltage | ±4.75 V | ±13.2 V | V | |
| Operating Temperature | -40°C | +85°C | °C | |
| Power Dissipation | 120 mW | 300 mW | mW | |
| Data Interface | SPI, DSP | |||
| Reference Type | Internal | |||
Key Features
- Direct Interface to DSP Processors: The AD766JNZ provides a direct, three-wire interface to popular DSP processors, eliminating the need for additional 'glue logic'.
- On-Chip Conversion and Amplification: It includes on-chip serial-to-parallel input format conversion, a 16-bit current-steering DAC, a voltage reference, and a voltage output op-amp.
- High AC Performance: Optimized for AC performance with a guaranteed 94 dB SNR up to 20 kHz and 79 dB SNR up to 250 kHz.
- Low Distortion: Laser-trimmed resistors reduce total harmonic distortion below -81 dB at 1 kHz.
- Output Amplifier Characteristics: The output amplifier provides a ±3 V signal with a high slew rate, small glitch, and fast settling, and is short-circuit protected.
- Flexible Power Supply: Operates over a ±5 V to ±12 V power supply range with separate analog and digital supply options to reduce digital crosstalk.
- Internal Bandgap Reference: Provides a precision voltage source stable over temperature and time.
Applications
The AD766JNZ is suitable for various applications requiring high precision and low distortion digital-to-analog conversion. These include:
- Digital Signal Processing: Direct integration with DSP processors makes it ideal for signal processing tasks.
- Noise Cancellation and Radar Jamming: High AC performance and low distortion make it suitable for noise cancellation and radar jamming applications.
- Automatic Test Equipment: Used in test equipment due to its precision and reliability.
- Precision Industrial Equipment: Suitable for industrial applications requiring high accuracy and reliability.
- Waveform Generation: Can be used for generating precise waveforms in various applications.
Q & A
- What is the resolution of the AD766JNZ?
The AD766JNZ has a resolution of 16 bits.
- What type of interface does the AD766JNZ use?
The AD766JNZ uses a three-wire interface compatible with SPI and DSP serial protocols.
- What is the signal-to-noise ratio (SNR) of the AD766JNZ?
The AD766JNZ has a guaranteed SNR of 94 dB up to 20 kHz and 79 dB up to 250 kHz.
- How does the AD766JNZ reduce total harmonic distortion?
The AD766JNZ uses laser-trimmed silicon chromium thin-film resistors to reduce total harmonic distortion below -81 dB at 1 kHz.
- What is the output range of the AD766JNZ's output amplifier?
The output amplifier provides a ±3 V signal.
- Is the AD766JNZ protected against short circuits?
Yes, the output amplifier is short-circuit protected and can withstand indefinite shorts to ground.
- What is the power supply range for the AD766JNZ?
The AD766JNZ operates over a ±5 V to ±12 V power supply range.
- What are the operating temperature ranges for the AD766JNZ?
The AD766JNZ is available in commercial (0°C to +70°C), industrial (-40°C to +85°C), and military (-55°C to +125°C) grades.
- What type of package is the AD766JNZ available in?
The AD766JNZ is available in a 16-pin plastic DIP for commercial and industrial grades, and a 16-pin ceramic DIP for military grades.
- What is the typical power dissipation of the AD766JNZ?
The typical power dissipation is 120 mW with ±5 V supplies and 300 mW with ±12 V supplies.
