Overview
The AD7224KPZ is a precision 8-bit, voltage-output, digital-to-analog converter (DAC) produced by Analog Devices Inc. This component features an output amplifier and double-buffered interface logic integrated on a monolithic CMOS chip. The AD7224KPZ is fabricated using the Linear Compatible CMOS (LC2MOS) process, which allows for the integration of high-speed digital logic and precision analog circuits on the same chip. This design ensures high reliability and low power consumption, making it suitable for a variety of applications.
Key Specifications
| Parameter | Value | Conditions/Comments |
|---|---|---|
| Number of Bits | 8 | |
| Number of D/A Converters | 1 | |
| Output Type | Voltage - Buffered | |
| Reference Type | External | |
| Data Interface | Parallel | |
| Voltage - Supply, Analog | 11.4 V to 16.5 V, ±5 V | Dual supply operation |
| Voltage - Supply, Digital | 14.25 V to 15.75 V | |
| INL/DNL (LSB) | ±1 (Max) | |
| Architecture | R-2R | |
| Settling Time | 20 µs | |
| Operating Temperature | -40°C to 85°C | |
| Package/Case | 20-Lead PLCC (J-Lead) | |
| Power Dissipation | 35 mW (typical with single supply) |
Key Features
- Double Buffered Interface Logic: The AD7224KPZ features two 8-bit registers—an input register and a DAC register—allowing for simultaneous updates in systems with multiple DACs. The interface logic is controlled by CS, WR, and LDAC lines, and the RESET line functions as a zero override when both registers are transparent.
- High Speed Logic: The control logic is speed compatible with most 8-bit microprocessors and supports TTL and CMOS (5 V) level compatibility.
- Low Power Consumption: Fabricated in the LC2MOS process, the AD7224KPZ has low power consumption, typically 35 mW with a single supply.
- Precision Performance: The DAC achieves an excellent total unadjusted error of less than 1 LSB over the full operating temperature range, ensuring high precision in analog output.
- Flexible Supply Operation: The component can operate with either dual supplies or a single supply, with specified performance guaranteed for input reference voltages from +2 V to +12.5 V.
Applications
The AD7224KPZ is suitable for various applications requiring precise digital-to-analog conversion, such as:
- Industrial Control Systems: For accurate control and monitoring in industrial environments.
- Medical Devices: Where precise analog outputs are critical for diagnostic and therapeutic equipment.
- Aerospace and Defense: For reliable and high-performance conversion in military and aerospace applications.
- Automotive Systems: For control and monitoring in automotive electronics.
- Test and Measurement Equipment: For generating precise analog signals in testing and measurement instruments.
Q & A
- What is the resolution of the AD7224KPZ?
The AD7224KPZ has an 8-bit resolution.
- What type of interface does the AD7224KPZ use?
The AD7224KPZ uses a parallel data interface.
- What is the typical settling time of the AD7224KPZ?
The typical settling time is 20 µs.
- Can the AD7224KPZ operate with a single supply?
- What is the operating temperature range of the AD7224KPZ?
The operating temperature range is -40°C to 85°C.
- What is the power dissipation of the AD7224KPZ?
The typical power dissipation is 35 mW with a single supply.
- Is the AD7224KPZ compatible with TTL and CMOS logic levels?
- What is the maximum voltage that the output amplifier can develop across a load?
The output amplifier can develop up to +10 V across a 2 kΩ load.
- Does the AD7224KPZ require external trims for full performance?
No, the AD7224KPZ does not require external trims to achieve full specified performance.
- What is the package type of the AD7224KPZ?
The AD7224KPZ is available in a 20-Lead PLCC (J-Lead) package.
