Overview
The AD7247ABR is a dual 12-bit digital-to-analog converter (DAC) produced by Analog Devices Inc. It is part of the DACPORT® series, known for its integrated voltage output amplifiers and on-chip Zener voltage reference. This component is an enhanced version of the industry-standard AD7237/AD7247, offering improved performance and compatibility with modern microprocessors.
The AD7247ABR is designed for applications requiring high precision and reliability, with features such as faster interface times, low power consumption, and a wide range of output voltage options. It is suitable for various industrial, medical, and automotive applications where precise analog output is crucial.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Converters | 2 |
| Number of Bits | 12 |
| Reference Type | External, Internal |
| Output Type | Voltage - Buffered |
| Settling Time | 8µs |
| Data Interface | Parallel |
| Package / Case | 24-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 85°C |
| Voltage - Supply, Digital | 10.8 V ~ 16.5 V |
| Voltage - Supply, Analog | ±10.8 V ~ 16.5 V |
| INL/DNL (LSB) | ±0.5 (Max), ±0.9 (Max) |
| Differential Output | No |
Key Features
- Dual 12-Bit DACs: The AD7247ABR features two 12-bit CMOS DACs on a single chip, offering significant space savings and increased reliability over multichip designs.
- On-Chip Voltage Reference: Includes an internal 5 V Zener voltage reference, which can be used or replaced with an external reference.
- Output Amplifiers: Equipped with output amplifiers capable of developing up to +10 V across a 2 kΩ load to GND.
- Fast Interface Times: Allows easy interfacing to most modern microprocessors with 8-bit or 16-bit data bus structures.
- Low Power Consumption: Operates with low power dissipation, typically 165 mW in single supply mode.
- Flexible Supply Operation: Supports single or dual supply operation with a wide power supply range from 12 V to 15 V.
- Multiple Output Ranges: Offers output voltage ranges of 0 V to +5 V, 0 V to +10 V, and ±5 V, depending on the configuration.
Applications
The AD7247ABR is versatile and can be used in various applications requiring precise digital-to-analog conversion. Some common applications include:
- Industrial Automation: For controlling and monitoring industrial processes where accurate analog signals are necessary.
- Medical Devices: In medical equipment such as patient monitoring systems, diagnostic devices, and therapeutic equipment.
- Automotive Systems: For applications in automotive electronics, including engine control units, infotainment systems, and safety systems.
- Aerospace and Defense: In systems requiring high reliability and precision, such as navigation, communication, and control systems.
Q & A
- What is the AD7247ABR?
The AD7247ABR is a dual 12-bit digital-to-analog converter (DAC) with integrated voltage output amplifiers and an on-chip Zener voltage reference.
- How many DACs are included in the AD7247ABR?
The AD7247ABR includes two 12-bit CMOS DACs.
- What is the reference type of the AD7247ABR?
The AD7247ABR supports both external and internal reference types.
- What is the settling time of the AD7247ABR?
The settling time of the AD7247ABR is 8µs.
- What are the output voltage ranges of the AD7247ABR?
The output voltage ranges include 0 V to +5 V, 0 V to +10 V, and ±5 V.
- What is the power supply range for the AD7247ABR?
The AD7247ABR operates from 12 V to 15 V supplies.
- Is the AD7247ABR ESD sensitive?
Yes, the AD7247ABR is ESD sensitive and requires proper ESD precautions to avoid damage.
- What is the operating temperature range of the AD7247ABR?
The operating temperature range is -40°C to 85°C.
- What is the typical power dissipation of the AD7247ABR?
The typical power dissipation is 165 mW in single supply mode.
- What kind of data interface does the AD7247ABR use?
The AD7247ABR uses a parallel data interface.
