Overview
The AD7245AAR-REEL, produced by Analog Devices Inc., is a precision 12-bit digital-to-analog converter (DAC) that integrates a voltage output amplifier and a Zener voltage reference on a single monolithic CMOS chip. This device is part of the DACPORT® series and is designed to offer high precision and reliability. It operates over a wide temperature range and is suitable for both commercial and industrial applications. The AD7245A does not require external user trims to achieve its full specified performance, making it a convenient and reliable choice for various digital-to-analog conversion needs.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| Resolution | 12 bits | ||
| Number of D/A Converters | 1 | ||
| Voltage - Supply, Digital | 10.8 V to 16.5 V | V | |
| Voltage - Supply, Analog | ±10.8 V to ±16.5 V | V | |
| Settling Time | 7 µs | µs | |
| Output Type | Voltage - Buffered | ||
| Reference Type | Internal | ||
| INL/DNL | ±0.75 LSB (Max), ±1 LSB (Max) | LSB | |
| Operating Temperature | -40°C to 85°C | °C | |
| Package / Case | 24-SOIC | ||
| Mounting Type | Surface Mount | ||
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Key Features
- High Precision: The AD7245A features a 12-bit resolution with low integral nonlinearity (INL) and differential nonlinearity (DNL) of ±0.75 LSB and ±1 LSB, respectively.
- Internal Reference: The device includes an on-chip 5 V buried Zener diode, providing a low noise, temperature-compensated reference voltage.
- Buffered Voltage Output: The output amplifier is capable of developing up to +10 V across a 2 kΩ load to ground.
- Parallel Data Interface: The AD7245A accepts 12-bit parallel data, loaded into the input latch on the rising edge of CS or WR.
- Asynchronous LDAC Signal: Transfers data from the input latch to the DAC latch and updates the analog output.
- CLR Signal: Allows features such as power-on reset to be implemented.
- Extended Temperature Range: Operates from -40°C to 85°C, making it suitable for both commercial and industrial applications.
- R-2R Ladder Architecture: Ensures high stability and precision in the digital-to-analog conversion process.
Applications
- Industrial Control Systems: The high precision and reliability of the AD7245A make it suitable for industrial control systems where accurate analog outputs are critical.
- Medical Devices: Can be used in medical devices that require precise analog signals, such as in diagnostic equipment and patient monitoring systems.
- Aerospace and Defense: The extended temperature range and high reliability of the AD7245A make it a good fit for aerospace and defense applications.
- Automotive Systems: Suitable for automotive systems that require high precision and reliability in their analog outputs.
- Test and Measurement Equipment: Used in various test and measurement equipment where precise analog signals are necessary.
Q & A
- What is the resolution of the AD7245A?
The AD7245A has a 12-bit resolution.
- What type of data interface does the AD7245A use?
The AD7245A uses a parallel data interface.
- What is the settling time of the AD7245A?
The settling time of the AD7245A is 7 µs.
- Does the AD7245A have an internal reference voltage?
Yes, the AD7245A includes an on-chip 5 V buried Zener diode as an internal reference voltage.
- What is the operating temperature range of the AD7245A?
The AD7245A operates from -40°C to 85°C.
- What type of output does the AD7245A provide?
The AD7245A provides a buffered voltage output.
- What is the package type of the AD7245AAR-REEL?
The AD7245AAR-REEL is packaged in a 24-SOIC (Small Outline Integrated Circuit) package.
- Is the AD7245A suitable for surface mounting?
Yes, the AD7245A is designed for surface mount applications.
- What is the moisture sensitivity level (MSL) of the AD7245A?
The MSL of the AD7245A is 1 (Unlimited).
- Is the AD7245A RoHS compliant?
Yes, the AD7245A is lead-free and RoHS compliant.
