Overview
The AD7224KN, produced by Analog Devices Inc., is a precision 8-bit, voltage-output, digital-to-analog converter (DAC) integrated with an output amplifier and double buffered interface logic on a monolithic CMOS chip. This device is fabricated using Analog Devices' Linear Compatible CMOS (LC2MOS) process, which allows for the integration of high-speed digital logic and precision analog circuits on the same chip. The AD7224KN does not require external trims to achieve its full specified performance, making it a reliable and efficient component for various applications.
Key Specifications
| Parameter | Value | Conditions/Comments |
|---|---|---|
| Resolution | 8 Bits | |
| Total Unadjusted Error | ±2 LSB max (±1 LSB max for some versions) | VDD = +15 V ± 5%, VREF = +10 V |
| Relative Accuracy | ±1 LSB max (±1/2 LSB max for some versions) | |
| Differential Nonlinearity | ±1 LSB max | |
| Full-Scale Error | ±3/2 LSB max (±1 LSB max for some versions) | |
| Full-Scale Temperature Coefficient | ±20 ppm/°C max | |
| Power Supply | Single or Dual Supply Operation | Single supply: +10 V, Dual supply: +2 V to +12.5 V |
| Output Amplifier Capability | +10 V across a 2 kΩ load | |
| Logic Compatibility | TTL and CMOS (5 V) level compatible | |
| Power Consumption | 35 mW typical (single supply) |
Key Features
- Precision DAC: The AD7224KN features a high-precision 8-bit DAC with low total unadjusted error and guaranteed monotonicity.
- Output Amplifier: Integrated output amplifier capable of developing +10 V across a 2 kΩ load.
- Double Buffered Interface: Includes two 8-bit registers (input register and DAC register) allowing for simultaneous updates in multiple DAC systems.
- Single or Dual Supply Operation: Can operate from a single power supply rail or with dual supplies for enhanced performance.
- High-Speed Logic: Compatible with most 8-bit microprocessors and supports high-speed digital logic circuits.
- Zero Override Function: The RESET line functions as a zero override when both registers are transparent, useful for system calibration cycles.
- Low Power Consumption: Typical power consumption of 35 mW with single supply operation.
Applications
- Industrial Control Systems: Suitable for precision control and measurement applications.
- Medical Devices: Used in medical equipment requiring precise analog output.
- Aerospace and Defense: Reliable performance in harsh environments.
- Automotive Systems: Applicable in automotive control and monitoring systems.
- Test and Measurement Equipment: Ideal for calibration and testing equipment due to its precision and reliability.
Q & A
- What is the resolution of the AD7224KN DAC?
The AD7224KN has an 8-bit resolution.
- Does the AD7224KN require external trims for full performance?
No, the AD7224KN does not require external trims to achieve its full specified performance.
- What are the power supply options for the AD7224KN?
The AD7224KN can operate with either a single power supply rail or dual supplies.
- What is the maximum output voltage of the AD7224KN's output amplifier?
The output amplifier can develop up to +10 V across a 2 kΩ load.
- Is the AD7224KN compatible with TTL and CMOS logic levels?
- What is the typical power consumption of the AD7224KN?
The typical power consumption is 35 mW with single supply operation.
- Does the AD7224KN support simultaneous updates in multiple DAC systems?
- What is the purpose of the zero override function in the AD7224KN?
The zero override function, activated when both registers are transparent, is useful for system calibration cycles.
- What fabrication process is used for the AD7224KN?
The AD7224KN is fabricated using Analog Devices' Linear Compatible CMOS (LC2MOS) process.
- What are some common applications of the AD7224KN?
The AD7224KN is commonly used in industrial control systems, medical devices, aerospace and defense, automotive systems, and test and measurement equipment.
