Overview
The AD7837BRZ, produced by Analog Devices Inc., is a complete, dual 12-bit multiplying digital-to-analog converter (DAC) with integrated output amplifiers on a monolithic CMOS chip. This device is part of the AD7837/AD7847 series and is known for its high precision and compatibility with microprocessors. The AD7837BRZ does not require external user trims to achieve full specified performance, making it a reliable choice for various applications. It is fabricated using Linear Compatible CMOS (LC2MOS), a mixed technology process that combines precision bipolar circuits with low power CMOS logic.
Key Specifications
| Parameter | Value | Units | Test Conditions |
|---|---|---|---|
| Resolution | 12 | Bits | |
| Relative Accuracy | ±1 | LSB max | |
| Differential Nonlinearity | ±1 | LSB max | |
| Zero Code Offset Error | ±2 | mV max @ +25°C | DAC Latch Loaded with All 0s |
| Gain Error | ±4 | mV max @ +25°C | |
| Output Voltage Range | ±10 V | Across a 2 kΩ load | |
| Power Supply | +15 V ± 5%, -15 V ± 5% | ||
| Package Type | 24-Lead SOIC (Wide) |
Key Features
- Microprocessor Compatibility: High speed data latches and interface logic ensure compatibility with microprocessors.
- Double-Buffered Interface: The AD7837 has a double-buffered 8-bit bus interface structure, allowing data to be loaded in two write operations.
- Integrated Output Amplifiers: Capable of developing ±10 V across a 2 kΩ load, with low input offset voltage due to laser trimming.
- Low Leakage Configuration: Ensures low offset errors over the specified temperature range, thanks to a novel low leakage configuration (U.S. Patent No. 4,590,456).
- Advanced Fabrication Process: Fabricated in Linear Compatible CMOS (LC2MOS), combining precision bipolar circuits with low power CMOS logic.
Applications
- Industrial Control Systems: Suitable for precision control and measurement applications.
- Medical Devices: Used in medical equipment requiring high accuracy and reliability.
- Aerospace and Defense: Applied in various military and aerospace applications due to its robust performance and reliability.
- Automotive Systems: Employed in automotive control systems that demand high precision and durability.
Q & A
- What is the resolution of the AD7837BRZ?
The AD7837BRZ has a resolution of 12 bits.
- What is the output voltage range of the AD7837BRZ?
The output voltage range is ±10 V across a 2 kΩ load.
- Does the AD7837BRZ require external user trims?
No, the AD7837BRZ does not require external user trims to achieve full specified performance.
- What is the fabrication process used for the AD7837BRZ?
The AD7837BRZ is fabricated using Linear Compatible CMOS (LC2MOS), a mixed technology process.
- What is the package type of the AD7837BRZ?
The AD7837BRZ is available in a 24-Lead SOIC (Wide) package.
- Is the AD7837BRZ compatible with microprocessors?
- What is the significance of the low leakage configuration in the AD7837BRZ?
The low leakage configuration ensures low offset errors over the specified temperature range.
- How is data loaded into the AD7837BRZ?
Data is loaded into the AD7837BRZ through a double-buffered 8-bit bus interface structure in two write operations.
- What are some common applications of the AD7837BRZ?
The AD7837BRZ is used in industrial control systems, medical devices, aerospace and defense, and automotive systems.
- What is the power supply requirement for the AD7837BRZ?
The AD7837BRZ operates from +15 V ± 5% and -15 V ± 5% power supplies.
