Overview
The AD7224LP-REEL, produced by Analog Devices Inc., is a precision 8-bit voltage-output digital-to-analog converter (DAC) with an integrated output amplifier. Fabricated using the Linear Compatible CMOS (LC2MOS) process, this device combines high-speed digital logic and precision analog circuits on a single monolithic chip. The AD7224 is designed to offer low power consumption, high reliability, and excellent performance characteristics, making it suitable for a variety of applications requiring accurate and stable analog output.
Key Specifications
| Parameter | Value | Units | Conditions/Comments |
|---|---|---|---|
| Resolution | 8 | Bits | |
| Total Unadjusted Error | ±2 ±1 LSB max | VDD = +15 V ± 5%, VREF = +10 V | |
| Relative Accuracy | ±1 ±1/2 LSB max | ||
| Differential Nonlinearity | ±1 ±1 LSB max | Guaranteed Monotonic | |
| Full-Scale Error | ±3/2 ±1 LSB max | ||
| Full-Scale Temperature Coefficient | ±20 ±20 ppm/°C max | ||
| Power Consumption | 35 mW typical | Single supply | |
| Supply Voltage Range | +2 V to +12.5 V (dual supply), +10 V (single supply) | ||
| Output Amplifier Capability | +10 V across a 2 kΩ load |
Key Features
- Low Total Unadjusted Error: The AD7224 features an excellent total unadjusted error of less than 1 LSB over the full operating temperature range, thanks to its novel DAC switch-pair arrangement and LC2MOS fabrication process.
- Single or Dual Supply Operation: The device can operate from a single power supply rail or with dual supplies, enhancing performance for some parameters.
- Double Buffered Interface Logic: The AD7224 includes two 8-bit registers (input and DAC registers) that allow simultaneous update in systems with multiple DACs. The interface logic is compatible with most 8-bit microprocessors.
- No External Trims Required: Full specified performance is achieved without the need for external trims.
- High-Speed Logic and Low Power Consumption: The device is fabricated in a high-speed LC2MOS process, ensuring low power consumption (35 mW typical) and high-speed digital logic compatibility.
- Zero Override Function: The RESET line can function as a zero override, bringing the output to 0 V for system calibration cycles.
Applications
The AD7224LP-REEL is suitable for various applications that require precise and stable analog output, including:
- Industrial control systems
- Medical devices
- Aerospace and defense systems
- Automotive systems
- Test and measurement equipment
Q & A
- What is the resolution of the AD7224LP-REEL?
The AD7224LP-REEL has a resolution of 8 bits. - What is the typical power consumption of the AD7224LP-REEL?
The typical power consumption is 35 mW when operating from a single supply. - Can the AD7224LP-REEL operate with both single and dual supplies?
Yes, the device can operate from a single power supply rail or with dual supplies. - What is the output capability of the integrated amplifier?
The output amplifier can develop +10 V across a 2 kΩ load. - Is the AD7224LP-REEL compatible with TTL and CMOS logic levels?
Yes, the device is compatible with both TTL and 5 V CMOS logic levels. - What is the purpose of the double buffered interface logic?
The double buffered interface logic allows simultaneous update in systems containing multiple AD7224s and ensures that only the data held in the DAC register determines the analog output. - How does the RESET line function in the AD7224LP-REEL?
The RESET line can function as a zero override, bringing the output to 0 V for system calibration cycles, and it can also latch all zeros into the registers. - What is the full-scale temperature coefficient of the AD7224LP-REEL?
The full-scale temperature coefficient is ±20 ppm/°C max. - Does the AD7224LP-REEL require external trims for full performance?
No, the device does not require external trims to achieve full specified performance. - What is the significance of the LC2MOS fabrication process in the AD7224LP-REEL?
The LC2MOS process allows for the integration of high-speed digital logic and precision analog circuits on the same chip, ensuring low power consumption and high reliability.
