Overview
The AD7247AAR, produced by Analog Devices Inc., is a dual 12-bit digital-to-analog converter (DAC) that integrates output amplifiers and a Zener voltage reference on a single monolithic CMOS chip. This device is part of the DACPORT® series, known for its compact design and enhanced reliability compared to multichip solutions. The AD7247AAR is designed to operate over a wide power supply range, from 12 V to 15 V, and features faster interface times, making it compatible with most modern microprocessors. It is particularly useful in applications requiring precise and reliable analog output generation.
Key Specifications
| Specification | Value |
|---|---|
| Number of Bits | 12 |
| Number of D/A Converters | 2 |
| Settling Time | 8 µs |
| Output Type | Voltage - Buffered |
| Differential Output | No |
| Data Interface | Parallel |
| Reference Type | External, Internal |
| Voltage - Supply, Analog | ±10.8 V ~ 16.5 V |
| Voltage - Supply, Digital | 10.8 V ~ 16.5 V |
| INL/DNL (LSB) | ±1 (Max), ±0.9 (Max) |
| Architecture | R-2R |
| Operating Temperature | –40°C ~ 85°C |
| Package / Case | 24-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
Key Features
- Dual 12-bit DACs: The AD7247AAR features two independent 12-bit digital-to-analog converters, allowing for precise analog output generation.
- Integrated Output Amplifiers and Reference: The device includes on-chip output amplifiers and a Zener voltage reference, eliminating the need for external components.
- Wide Power Supply Range: Operates from 12 V to 15 V supplies, making it versatile for various applications.
- Fast Interface Times: Compatible with most modern microprocessors, whether they have 8-bit or 16-bit data bus structures.
- Microprocessor Compatibility: High-speed data latches and interface logic ensure easy integration with microprocessors.
- Flexible Output Ranges: Supports output ranges of 0 V to +5 V, 0 V to +10 V, and ±5 V with dual supplies.
- ESD Protection: Features proprietary ESD protection circuitry to prevent damage from electrostatic discharges.
Applications
The AD7247AAR is suitable for a variety of applications requiring precise and reliable analog output generation. These include:
- Industrial Control Systems: For controlling analog devices in industrial environments.
- Medical Equipment: In medical devices that require accurate analog outputs.
- Aerospace and Defense: For applications needing high reliability and precision.
- Automotive Systems: For controlling various analog parameters in automotive electronics.
- Test and Measurement Equipment: For generating precise analog signals in test and measurement applications.
Q & A
- What is the resolution of the AD7247AAR?
The AD7247AAR has a resolution of 12 bits.
- How many D/A converters does the AD7247AAR have?
The AD7247AAR features two independent D/A converters.
- What is the settling time of the AD7247AAR?
The settling time of the AD7247AAR is 8 µs.
- What type of data interface does the AD7247AAR use?
The AD7247AAR uses a parallel data interface.
- What are the available output ranges for the AD7247AAR?
The output ranges include 0 V to +5 V, 0 V to +10 V, and ±5 V with dual supplies.
- Does the AD7247AAR have built-in ESD protection?
Yes, the AD7247AAR features proprietary ESD protection circuitry.
- What is the operating temperature range of the AD7247AAR?
The operating temperature range is –40°C to 85°C.
- What type of package does the AD7247AAR come in?
The AD7247AAR comes in a 24-SOIC package.
- Is the AD7247AAR compatible with microprocessors?
Yes, it is compatible with most modern microprocessors, whether they have 8-bit or 16-bit data bus structures.
- Can the AD7247AAR use an external reference voltage?
Yes, the AD7247AAR allows the use of either the on-chip 5 V reference or an external reference voltage.
