Overview
The AD7837ARZ is a dual, 12-bit multiplying digital-to-analog converter (DAC) with output amplifiers, manufactured by Analog Devices Inc. This component is part of the AD7837/AD7847 family and is fabricated using Linear Compatible CMOS (LC2MOS) technology, which combines precision bipolar circuits with low power CMOS logic. The device is microprocessor compatible and features high-speed data latches and interface logic, making it suitable for a variety of applications requiring precise analog output control.
Key Specifications
| Parameter | Value | Units | Comments |
|---|---|---|---|
| Resolution | 12 | Bits | |
| Relative Accuracy | ±1 | LSB max | |
| Differential Nonlinearity | ±1 | LSB max | |
| Zero Code Offset Error | ±2 | mV max | @ +25°C |
| Gain Error | ±4 | mV max | @ +25°C |
| Settling Time | 4 μs | ||
| Power Dissipation (Max) | 210 mW | ||
| Operating Temperature | -40°C to 85°C | ||
| Mounting Type | Surface Mount | ||
| Package | 24-SOIC (Wide) | ||
| Number of Outputs and Type | 2 Voltage (Unipolar and Bipolar) | ||
| Sampling Rate (Per Second) | 250 k |
Key Features
- Dual 12-Bit DACs: The AD7837ARZ features two independent 12-bit DACs, each with its own output amplifier.
- Microprocessor Compatibility: High-speed data latches and interface logic make it compatible with microprocessors.
- Double-Buffered Interface: The AD7837ARZ has a double-buffered 8-bit bus interface structure, allowing data to be loaded in two write operations.
- Low Offset Errors: Internally compensated output amplifiers with low input offset voltage due to laser trimming at wafer level.
- Simultaneous Update: The LDAC input allows for simultaneous updating of both DAC latches and analog outputs.
- Low Power Consumption: Maximum power dissipation of 210 mW.
- Wide Operating Temperature Range: Operates from -40°C to 85°C.
Applications
- Industrial Control Systems: Suitable for applications requiring precise analog output control in industrial environments.
- Medical Devices: Can be used in medical equipment where high accuracy and reliability are crucial.
- Aerospace and Defense: Applicable in aerospace and defense systems due to its robust specifications and reliability.
- Automotive Systems: Used in automotive applications that require high precision and durability.
- Test and Measurement Equipment: Ideal for use in test and measurement instruments where accuracy and stability are essential.
Q & A
- What is the resolution of the AD7837ARZ DAC?
The AD7837ARZ has a resolution of 12 bits.
- What is the maximum power dissipation of the AD7837ARZ?
The maximum power dissipation is 210 mW.
- What is the operating temperature range of the AD7837ARZ?
The operating temperature range is from -40°C to 85°C.
- How many DACs does the AD7837ARZ have?
The AD7837ARZ features two independent DACs.
- What type of package does the AD7837ARZ come in?
The AD7837ARZ comes in a 24-SOIC (Wide) package.
- Is the AD7837ARZ microprocessor compatible?
Yes, the AD7837ARZ is microprocessor compatible with high-speed data latches and interface logic.
- What is the settling time of the AD7837ARZ?
The settling time is 4 μs.
- Can the AD7837ARZ update both DAC latches simultaneously?
Yes, the LDAC input allows for simultaneous updating of both DAC latches and analog outputs.
- What is the typical gain error of the AD7837ARZ at +25°C?
The typical gain error at +25°C is ±4 mV max.
- Is the AD7837ARZ suitable for high-temperature environments?
Yes, it operates reliably from -40°C to 85°C.
