Overview
The AD7245AANZ, 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 is designed to operate from 12 V to 15 V supplies and features improved linearity, faster interface times, and better full-scale and reference variations. The AD7245AANZ 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 from digital data.
Key Specifications
| Specification | Value |
|---|---|
| Number of Bits | 12 |
| Number of D/A Converters | 1 |
| Settling Time | 7 µs |
| Output Type | Voltage - Buffered |
| Differential Output | No |
| Data Interface | Parallel |
| Reference Type | Internal |
| Voltage - Supply, Analog | ±10.8 V ~ 16.5 V |
| Voltage - Supply, Digital | 10.8 V ~ 16.5 V |
| INL/DNL (LSB) | ±1 (Max) |
| Architecture | R-2R |
| Operating Temperature | -40°C ~ 85°C |
| Package | 24-DIP (0.300", 7.62mm) |
Key Features
- High-speed data latches and double-buffered interface logic for efficient data transfer.
- On-chip 5 V buried Zener diode providing a low noise, temperature-compensated reference.
- Single supply operation with output ranges of 0 V to +5 V and 0 V to +10 V, and dual supply operation with an additional ±5 V range.
- Output amplifiers capable of developing +10 V across a 2 kOhm load to GND.
- Extended temperature range operation for commercial and industrial grades.
- No external user trims required to achieve full specified performance.
- CLR signal on the DAC latch for features like power-on reset.
- Low digital feedthrough of 10 nV-s in a 5 V output range.
Applications
The AD7245AANZ is suitable for various applications that require precise digital-to-analog conversion, including:
- Industrial control systems.
- Medical devices.
- Aerospace and defense systems.
- Automotive systems.
- Test and measurement equipment.
- Audio and video systems requiring high-quality analog output.
Q & A
- What is the resolution of the AD7245AANZ?
The AD7245AANZ is a 12-bit digital-to-analog converter. - What is the settling time of the AD7245AANZ?
The settling time is 7 µs. - What are the available output voltage ranges for the AD7245AANZ?
The output voltage ranges include 0 V to +5 V, 0 V to +10 V for single supply, and ±5 V for dual supply operation. - Is the AD7245AANZ microprocessor compatible?
Yes, it is microprocessor compatible with high-speed data latches and double-buffered interface logic. - What type of reference does the AD7245AANZ use?
The AD7245AANZ uses an internal 5 V buried Zener diode as its reference. - What is the operating temperature range of the AD7245AANZ?
The operating temperature range is -40°C to 85°C. - Does the AD7245AANZ require external user trims?
No, it does not require external user trims to achieve full specified performance. - What is the package type of the AD7245AANZ?
The AD7245AANZ is available in a 24-DIP (0.300", 7.62mm) package. - What is the architecture of the DAC in the AD7245AANZ?
The DAC architecture is R-2R. - How does the CLR signal function in the AD7245AANZ?
The CLR signal allows features such as power-on reset to be implemented by clearing the contents of the DAC latch.
