Overview
The AD7224LPZ is a precision 8-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc. This integrated circuit is designed with a voltage-output architecture and includes an output amplifier and double-buffered interface logic on a monolithic CMOS chip. The AD7224LPZ does not require external trims to achieve its full specified performance, making it a reliable choice for various applications. It is fabricated using an all ion-implanted high-speed Linear Compatible CMOS (LC2MOS) process, allowing for the integration of high-speed digital logic and precision analog circuits on the same chip.
Key Specifications
| Parameter | Value | Conditions/Comments |
|---|---|---|
| Number of Bits | 8 | |
| Number of D/A Converters | 1 | |
| Settling Time | 20 μs | |
| Output Type | Voltage - Buffered | |
| Differential Output | No | |
| Data Interface | Parallel | |
| Reference Type | External | |
| Voltage - Supply, Analog | 11.4 V ~ 16.5 V, ±5 V | |
| Voltage - Supply, Digital | 14.25 V ~ 15.75 V | |
| INL/DNL (LSB) | ±0.5 (Max), ±1 (Max) | |
| Architecture | R-2R | |
| Operating Temperature | -40°C ~ 85°C | |
| Package | 20-LCC (J-Lead) | |
| Mounting Type | Surface Mount |
Key Features
- Double Buffered Interface Logic: The AD7224LPZ features two 8-bit registers—an input register and a DAC register—allowing for simultaneous updates in systems with multiple AD7224s. The registers can be made transparent under the control of external lines (CS, WR, and LDAC).
- High-Speed CMOS Process: Fabricated using an all ion-implanted high-speed Linear Compatible CMOS (LC2MOS) process, enabling the integration of high-speed digital logic and precision analog circuits on the same chip.
- Output Amplifier: The output amplifier is capable of developing +10 V across a 2 kΩ load, ensuring robust output performance.
- Logic Compatibility: The digital inputs are compatible with TTL and 5 V CMOS levels, and the control logic is speed-compatible with most 8-bit microprocessors.
- Low Power Consumption: The digital inputs have typical input currents of less than 1 nA, minimizing power supply currents.
- Temperature Range: Operates over a wide temperature range of -40°C to 85°C, making it suitable for various environmental conditions.
Applications
- Data Acquisition Systems: Ideal for converting digital data into analog signals in data acquisition systems.
- Audio Equipment: Used in audio applications where precise analog output is required.
- Biomedical Devices: Suitable for biomedical devices due to its precision and reliability.
- Industrial Control Systems: Employed in industrial control systems for accurate analog signal generation.
Q & A
- What is the resolution of the AD7224LPZ DAC?
The AD7224LPZ is an 8-bit digital-to-analog converter.
- What is the settling time of the AD7224LPZ?
The settling time of the AD7224LPZ is 20 μs.
- What type of output does the AD7224LPZ provide?
The AD7224LPZ provides a voltage-output, buffered DAC.
- What is the operating temperature range of the AD7224LPZ?
The operating temperature range is -40°C to 85°C.
- What is the package type of the AD7224LPZ?
The AD7224LPZ is available in a 20-LCC (J-Lead) package.
- Is the AD7224LPZ compatible with TTL and CMOS logic levels?
Yes, the digital inputs are compatible with TTL and 5 V CMOS levels.
- What is the reference type for the AD7224LPZ?
The AD7224LPZ uses an external reference type.
- Can the AD7224LPZ operate with a single supply voltage?
Yes, the AD7224LPZ can operate with a single supply voltage using a reference of +10 V.
- How does the double buffering in the AD7224LPZ work?
The double buffering allows for simultaneous updates in systems with multiple AD7224s. The data held in the DAC register determines the analog output, and the registers can be made transparent under the control of external lines (CS, WR, and LDAC).
- What is the maximum full-scale error of the AD7224LPZ?
The maximum full-scale error is ±3/2 LSB for dual supply operation and ±1 LSB for single supply operation.
