Overview
The AD7245AARZ-REEL, produced by Analog Devices Inc., is an enhanced version of the industry-standard AD7245/AD7248 digital-to-analog converters. This component is a complete, 12-bit, voltage output digital-to-analog converter (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 features improved linearity, faster interface times, and better full-scale and reference variations. The AD7245A is microprocessor compatible, with high-speed data latches and double-buffered interface logic, making it suitable for a wide range of applications requiring precise analog output control.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Resolution | 12 bits | |
| Conversion Rate | 143 ksps | |
| Integral Nonlinearity (INL) | ±1/2 LSB | |
| Interface | Parallel | |
| Max Dual Supply Voltage | +12 V to +15 V, -12 V to -15 V | |
| Output Voltage Ranges | 0 V to +5 V, 0 V to +10 V, ±5 V (dual supplies) | |
| Load Capability | +10 V across a 2 kΩ load to GND | |
| Package Type | 24-Lead SOIC (Wide) | |
| Operating Temperature Range | Commercial and industrial grades |
Key Features
- On-chip 5 V buried Zener diode for low noise, temperature-compensated reference.
- No external user trims required for full specified performance.
- Microprocessor compatible with high-speed data latches and double-buffered interface logic.
- Double-buffered parallel input for the AD7245A, with data loaded into the input latch on the rising edge of CS or WR.
- Asynchronous LDAC signal for transferring data from the input latch to the DAC latch and updating the analog output.
- CLR signal on the DAC latch for features like power-on reset.
- Extended temperature range operation for commercial and industrial grades.
Applications
The AD7245AARZ-REEL is suitable for various applications requiring 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 AD7245AARZ-REEL?
The AD7245AARZ-REEL has a resolution of 12 bits. - What is the conversion rate of the AD7245AARZ-REEL?
The conversion rate is 143 ksps. - What are the output voltage ranges of the AD7245AARZ-REEL?
The output voltage ranges are 0 V to +5 V, 0 V to +10 V, and ±5 V with dual supplies. - What type of interface does the AD7245AARZ-REEL use?
The AD7245AARZ-REEL uses a parallel interface. - Does the AD7245AARZ-REEL require external user trims?
No, the AD7245AARZ-REEL does not require external user trims to achieve full specified performance. - What is the purpose of the CLR signal on the AD7245AARZ-REEL?
The CLR signal allows features such as power-on reset to be implemented. - What is the operating temperature range of the AD7245AARZ-REEL?
The operating temperature range includes commercial and industrial grades. - What type of package is the AD7245AARZ-REEL available in?
The AD7245AARZ-REEL is available in a 24-Lead SOIC (Wide) package. - What is the load capability of the AD7245AARZ-REEL's output amplifier?
The output amplifier can develop +10 V across a 2 kΩ load to GND. - What is the reference voltage source for the AD7245AARZ-REEL?
The reference voltage is provided by an on-chip 5 V buried Zener diode.
