Overview
The AD5781BRUZ from Analog Devices Inc. is a single, 18-bit, unbuffered voltage output digital-to-analog converter (DAC). It operates from a bipolar supply of up to 33 V, making it versatile for various high-precision applications. The DAC accepts a positive reference input range of 5 V to VDD − 2.5 V and a negative reference input range of VSS + 2.5 V to 0 V. It offers a relative accuracy specification of ±0.5 LSB maximum and is guaranteed monotonic with a ±0.5 LSB differential nonlinearity (DNL) maximum specification.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Resolution | 18 bits | - | - |
| Relative Accuracy | ±0.5 LSB | - | Maximum specification |
| Differential Nonlinearity (DNL) | ±0.5 LSB | - | Maximum specification |
| Output Voltage Settling Time | 1 µs | - | 10 V step to 0.02%, using AD845 buffer in unity-gain mode |
| Output Slew Rate | 50 V/µs | - | Unbuffered output, 10 MΩ 20 pF load |
| Midscale Glitch Impulse | 3.1 nV-sec | - | VREFP = +10 V, VREFN = −10 V |
| Output Noise Spectral Density | 7.5 nV/√Hz | - | At 1 kHz, DAC code = midscale |
| Temperature Range | −40°C to +125°C | - | - |
| Package | 20-lead TSSOP | - | - |
| Supply Voltage Range | ±2.7 V to ±16.5 V | - | - |
| Digital Interface | 3-wire serial interface, up to 35 MHz | - | Compatible with SPI, QSPI, MICROWIRE, and DSP interface standards |
Key Features
- High Precision: Offers a relative accuracy of ±0.5 LSB and differential nonlinearity of ±0.5 LSB, ensuring high precision in output voltage.
- Fast Settling Time: 1 µs output voltage settling time, which is crucial for applications requiring quick response times.
- Wide Supply Range: Operates from a bipolar supply of up to 33 V, with a wide power supply range of ±2.7 V to ±16.5 V.
- Low Noise: Features a low output noise spectral density of 7.5 nV/√Hz at 1 kHz, making it suitable for noise-sensitive applications.
- High-Speed Interface: Uses a versatile 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards, operating at clock rates up to 35 MHz.
- Temperature Stability: Operates over a wide temperature range from −40°C to +125°C, ensuring stability in various environmental conditions.
Applications
- Medical Instrumentation: Suitable for medical devices requiring high precision and reliability.
- Test and Measurement: Ideal for test and measurement equipment where accurate voltage output is critical.
- Industrial Control: Used in industrial control systems for precise control and monitoring.
- Scientific and Aerospace Instrumentation: Applicable in scientific and aerospace applications due to its high precision and wide operating temperature range.
- Data Acquisition Systems: Employed in data acquisition systems for accurate data conversion.
- Digital Gain and Offset Adjustment: Useful for adjusting gain and offset in various electronic systems.
- Power Supply Control: Used in power supply control systems to ensure precise voltage regulation.
Q & A
- What is the resolution of the AD5781BRUZ DAC?
The AD5781BRUZ has a resolution of 18 bits.
- What is the relative accuracy of the AD5781BRUZ?
The relative accuracy is ±0.5 LSB maximum.
- What is the differential nonlinearity (DNL) of the AD5781BRUZ?
The DNL is ±0.5 LSB maximum.
- What is the output voltage settling time of the AD5781BRUZ?
The output voltage settling time is 1 µs.
- What is the output slew rate of the AD5781BRUZ?
The output slew rate is 50 V/µs.
- What is the temperature range of the AD5781BRUZ?
The temperature range is from −40°C to +125°C.
- What type of digital interface does the AD5781BRUZ use?
The AD5781BRUZ uses a 3-wire serial interface compatible with SPI, QSPI, MICROWIRE, and DSP interface standards.
- What is the maximum clock rate of the digital interface?
The maximum clock rate is up to 35 MHz.
- What are some common applications of the AD5781BRUZ?
Common applications include medical instrumentation, test and measurement, industrial control, scientific and aerospace instrumentation, data acquisition systems, digital gain and offset adjustment, and power supply control.
- What is the package type of the AD5781BRUZ?
The package type is a 20-lead TSSOP.
