Overview
The AD7245ABR, produced by Analog Devices Inc., is an enhanced version of the industry-standard AD7245/AD7248 digital-to-analog converters (DACs). This component is a complete, 12-bit, voltage output DAC with an integrated output amplifier and a Zener voltage reference on a monolithic CMOS chip. It operates from 12 V to 15 V supplies and is designed for high performance with features such as improved linearity, faster interface times, and better full-scale and reference variations. The AD7245ABR is microprocessor compatible and includes high-speed data latches and double-buffered interface logic, making it suitable for a variety of applications requiring precise analog output control.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Resolution | 12 bits | |
| Output Voltage Range | 0 V to +5 V, 0 V to +10 V (single supply), ±5 V (dual supply) | |
| Supply Voltage | +12 V to +15 V, –12 V to –15 V (dual supply) | |
| Linearity Grade | ±1/2 LSB | |
| Interface Times | Chip Select Pulsewidth: 80 ns min, Write Pulsewidth: 80 ns min | TMIN to TMAX |
| Load Capability | +10 V across a 2 kΩ load to GND | |
| Temperature Range | Commercial and industrial grades available | |
| Package Types | 24-pin DIP, SOIC, and surface mount packages |
Key Features
- On-chip 5 V buried Zener diode for low noise, temperature-compensated reference.
- Double-buffered parallel input for high-speed data transfer.
- Asynchronous LDAC signal for updating the analog output.
- CLR signal for power-on reset and other features.
- Microprocessor compatibility with high-speed data latches.
- Extended temperature range operation for commercial and industrial grades.
- No external user trims required for full specified performance.
Applications
The AD7245ABR is suitable for various applications that require precise digital-to-analog conversion, such as:
- Industrial control systems.
- Aerospace and defense systems.
- Medical devices.
- Automotive systems.
- Test and measurement equipment.
Q & A
- What is the resolution of the AD7245ABR?
The AD7245ABR has a resolution of 12 bits. - What are the output voltage ranges of the AD7245ABR?
The output voltage ranges are 0 V to +5 V, 0 V to +10 V (single supply), and ±5 V (dual supply). - What is the supply voltage range for the AD7245ABR?
The supply voltage range is +12 V to +15 V and –12 V to –15 V for dual supply. - What is the linearity grade of the AD7245ABR?
The linearity grade is ±1/2 LSB. - Does the AD7245ABR require external user trims?
No, the AD7245ABR does not require external user trims to achieve full specified performance. - What types of packages are available for the AD7245ABR?
The AD7245ABR is available in 24-pin DIP, SOIC, and surface mount packages. - Is the AD7245ABR microprocessor compatible?
Yes, the AD7245ABR is microprocessor compatible with high-speed data latches and double-buffered interface logic. - What is the purpose of the CLR signal on the AD7245ABR?
The CLR signal allows features such as power-on reset to be implemented. - What is the load capability of the output amplifier in the AD7245ABR?
The output amplifier can develop +10 V across a 2 kΩ load to GND. - What are some common applications for the AD7245ABR?
Common applications include industrial control systems, aerospace and defense systems, medical devices, automotive systems, and test and measurement equipment.
