Overview
The AD5791ARUZ, produced by Analog Devices Inc., is a high-precision, 20-bit, unbuffered voltage-output digital-to-analog converter (DAC). This device operates from a bipolar supply of up to 33 V and is designed for applications requiring high accuracy and fast settling times. The AD5791 features a versatile 3-wire serial interface compatible with SPI, QSPI, and MICROWIRE interface standards, as well as most DSPs. It is particularly suited for instrumentation, measurement, and precision applications due to its high resolution and low noise characteristics.
Key Specifications
| Parameter | Specification |
|---|---|
| Number of Bits | 20 |
| Data Interface | SPI, QSPI, MICROWIRE, DSP |
| Reference Type | External |
| Operating Temperature | -40°C to +125°C |
| Voltage Supply | VDD: 7.5 V to 16.5 V, VSS: -16.5 V to -2.5 V |
| Relative Accuracy | ±1 LSB max |
| Differential Nonlinearity (DNL) | ±1 LSB max |
| Settling Time | 1 μs |
| Noise Spectral Density | 7.5 nV/√Hz |
| Glitch Impulse | 1.4 nV-sec |
| Package | 20-Lead TSSOP |
Key Features
- High Accuracy: The AD5791 offers a relative accuracy of ±1 LSB and a differential nonlinearity of ±1 LSB, ensuring high precision in output voltage.
- Fast Settling Time: The device has a settling time of 1 μs, making it suitable for applications requiring rapid changes in output voltage.
- Low Noise: With a noise spectral density of 7.5 nV/√Hz, the AD5791 is ideal for low-noise applications.
- Power-On Reset: The device includes a power-on reset circuit that ensures the DAC output powers up to 0 V, providing a known state during power-up.
- Output Clamp Feature: The AD5791 has an output clamp feature that places the output in a defined load state.
- Wide Power Supply Range: The device operates from a bipolar supply of up to ±16.5 V.
- High-Speed Digital Interface: The 3-wire serial interface operates at clock rates up to 35 MHz and is compatible with various interface standards.
Applications
- Instrumentation and Measurement: The high accuracy and low noise of the AD5791 make it suitable for precision measurement instruments.
- Chemical Analysis and Analytical Instruments: The device is used in applications requiring precise voltage control, such as in chemical analysis equipment.
- Data Acquisition Systems: The AD5791 is used in data acquisition systems where high-resolution and fast settling times are critical.
- DC Sources and Power Supplies: The device can be used in high-precision DC sources and power supplies due to its ability to generate precise output voltages.
- Aerospace and Defense: The AD5791-EP version supports defense and aerospace applications with enhanced specifications and controlled manufacturing baseline.
Q & A
- What is the resolution of the AD5791?
The AD5791 is a 20-bit digital-to-analog converter.
- What is the operating temperature range of the AD5791?
The operating temperature range is -40°C to +125°C.
- What type of data interface does the AD5791 use?
The AD5791 uses a 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.
- What is the settling time of the AD5791?
The settling time is 1 μs.
- Does the AD5791 have a power-on reset feature?
Yes, the AD5791 includes a power-on reset circuit that ensures the DAC output powers up to 0 V.
- What is the noise spectral density of the AD5791?
The noise spectral density is 7.5 nV/√Hz.
- What is the package type of the AD5791?
The AD5791 is available in a 20-Lead TSSOP package.
- Is the AD5791 suitable for aerospace and defense applications?
Yes, the AD5791-EP version is designed to support defense and aerospace applications with enhanced specifications.
- What is the relative accuracy of the AD5791?
The relative accuracy is ±1 LSB max.
- Does the AD5791 have an output clamp feature?
Yes, the AD5791 has an output clamp feature that places the output in a defined load state.
