Overview
The AD7224KR-18, 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 AD7224KR-18 does not require external trims to achieve its full specified performance, making it a reliable and efficient choice for various applications.
Key Specifications
| Parameter | Value | Units | Conditions/Comments |
|---|---|---|---|
| Resolution | 8 | Bits | |
| Total Unadjusted Error | ±1 LSB max | VDD = +15 V ± 5%, VREF = +10 V | |
| Relative Accuracy | ±1/2 LSB max | ||
| Differential Nonlinearity | ±1 LSB max | ||
| Full-Scale Error | ±1 LSB max | ||
| Full-Scale Temperature Coefficient | ±20 ppm/°C max | ||
| Power Consumption | 35 mW typical | Single supply | |
| Input Reference Voltage Range | +2 V to +12.5 V | Dual supplies | |
| Output Amplifier Capability | +10 V across a 2 kΩ load |
Key Features
- Precision 8-Bit DAC: The AD7224KR-18 offers high precision with a total unadjusted error of less than 1 LSB over the full operating temperature range.
- Double Buffered Interface Logic: The device includes two 8-bit registers (input register and DAC register) allowing for simultaneous updates in systems with multiple DACs.
- Single or Dual Supply Operation: The AD7224KR-18 can operate from a single power supply rail or with dual supplies, enhancing performance for certain parameters.
- Low Power Consumption: Fabricated in CMOS, the device consumes low power, typically 35 mW with a single supply.
- High Speed Logic Compatibility: The control logic is compatible with TTL and 5V CMOS levels and is speed-compatible with most 8-bit microprocessors.
- Zero Override Function: The RESET line functions as a zero override when both registers are transparent, useful for system calibration cycles.
Applications
- Industrial Control Systems: The precision and reliability of the AD7224KR-18 make it suitable for industrial control systems requiring accurate analog outputs.
- Medical Devices: Its high precision and low power consumption are beneficial in medical devices where accuracy and efficiency are critical.
- Aerospace and Defense: The device's robust performance and reliability under various operating conditions make it a good fit for aerospace and defense applications.
- Automotive Systems: The AD7224KR-18 can be used in automotive systems that require precise analog outputs and reliable operation.
Q & A
- What is the resolution of the AD7224KR-18?
The AD7224KR-18 has a resolution of 8 bits.
- What is the total unadjusted error of the AD7224KR-18?
The total unadjusted error is less than ±1 LSB over the full operating temperature range.
- Can the AD7224KR-18 operate with a single power supply?
- What is the power consumption of the AD7224KR-18?
The typical power consumption is 35 mW with a single supply.
- Is the AD7224KR-18 compatible with TTL and CMOS logic levels?
- What is the function of the double buffered interface logic?
The double buffered interface logic allows for simultaneous updates in systems with multiple DACs and includes an input register and a DAC register.
- What is the capability of the output amplifier?
The output amplifier can develop +10 V across a 2 kΩ load.
- What is the purpose of the zero override function?
The zero override function, activated by the RESET line when both registers are transparent, is useful for system calibration cycles.
- What fabrication process is used for the AD7224KR-18?
The device is fabricated using Analog Devices' Linear Compatible CMOS (LC2MOS) process.
- What are some typical applications of the AD7224KR-18?
The AD7224KR-18 is suitable for industrial control systems, medical devices, aerospace and defense applications, and automotive systems.
