Overview
The AD7224LP, 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 AD7224LP is designed to offer low power consumption, typically 35 mW with a single supply, and excellent total unadjusted error of less than 1 LSB over the full operating temperature range.
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 | |
| Supply Voltage (Digital) | 11.4 V to 16.5 V, ±5 V | |
| Supply Voltage (Analog) | 11.4 V to 16.5 V, ±5 V | |
| Reference Voltage | +2 V to +12.5 V (dual supplies), +10 V (single supply) | |
| Operating Temperature | -40°C to 85°C | |
| Settling Time | 20 µs | |
| Package | 20-PLCC (9x9) |
Key Features
- Single or Dual Supply Operation: The AD7224LP can operate from a single power supply rail or with dual supplies, enhancing performance for some parameters.
- Low Power Consumption: Typical power consumption is 35 mW with a single supply.
- High Accuracy: Excellent total unadjusted error of less than 1 LSB over the full operating temperature range.
- Double Buffered Interface Logic: Allows simultaneous update in systems containing multiple AD7224s and features a zero override function for system calibration cycles.
- Compatibility with Microprocessors: High-speed logic compatible with most 8-bit microprocessors and TTL/CMOS (5 V) level inputs.
- No External Trims Required: Achieves full specified performance without external trims.
Applications
- Industrial Control Systems: Suitable for applications requiring precise analog output control, such as in industrial automation and process control.
- Medical Devices: Used in medical equipment where high accuracy and reliability are crucial.
- Aerospace and Defense: Applicable in aerospace and defense systems due to its robust performance and reliability.
- Automotive Systems: Can be used in automotive control systems that require precise analog outputs.
- Test and Measurement Equipment: Ideal for test and measurement instruments that demand high accuracy and stability.
Q & A
- What is the resolution of the AD7224LP?
The AD7224LP has a resolution of 8 bits.
- What is the typical power consumption of the AD7224LP?
The typical power consumption is 35 mW with a single supply.
- Can the AD7224LP operate with both single and dual power supplies?
Yes, the AD7224LP can operate from a single power supply rail or with dual supplies.
- What is the operating temperature range of the AD7224LP?
The operating temperature range is -40°C to 85°C.
- What type of interface logic does the AD7224LP use?
The AD7224LP uses double-buffered interface logic, allowing simultaneous updates in multiple DAC systems.
- Is the AD7224LP compatible with TTL and CMOS logic levels?
Yes, the AD7224LP is compatible with both TTL and 5 V CMOS logic levels.
- What is the settling time of the AD7224LP?
The settling time is 20 µs.
- Does the AD7224LP require external trims for full performance?
No, the AD7224LP does not require external trims to achieve full specified performance.
- What is the maximum output voltage of the AD7224LP's output amplifier?
The output amplifier can develop up to +10 V across a 2 kΩ load.
- What is the package type of the AD7224LP?
The AD7224LP is available in a 20-PLCC (9x9) package.
