Overview
The AD7245AAN, 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 for high performance and reliability, requiring no external user trims to achieve full specified performance. The AD7245AAN is microprocessor compatible, featuring high-speed data latches and double-buffered interface logic, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12-bit | |
| Output Voltage Range | 0 V to +5 V, 0 V to +10 V (single supply), ±5 V (dual supply) | V |
| Linearity Grade | ±1/2 LSB | |
| Power Supply | 12 V to 15 V | V |
| Temperature Range | Commercial and industrial grades | |
| Package Types | 24-pin DIP, SOIC, 28-terminal surface mount | |
| Reference Voltage | On-chip 5 V buried Zener diode | V |
| Digital Interface | Parallel input, double-buffered logic | |
| Control Signals | CS (Chip Select), WR (Write), LDAC (Load DAC), CLR (Clear) |
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 voltage.
- No external user trims required to achieve full specified performance.
- Extended temperature range operation for commercial and industrial grades.
- Microprocessor compatibility with asynchronous LDAC signal for updating analog output.
- CLR signal for implementing features like power-on reset.
- Low digital feedthrough of 10 nV-s in a 5 V output range.
- Internal input protection with on-chip distributed diodes.
Applications
- Industrial control systems requiring precise analog output.
- Aerospace and defense applications where high reliability and precision are critical.
- Medical devices that need accurate and stable analog signals.
- Automotive systems for control and monitoring.
- Test and measurement equipment where precision DACs are essential.
Q & A
- What is the resolution of the AD7245AAN DAC?
The AD7245AAN has a 12-bit resolution.
- What are the available output voltage ranges for the AD7245AAN?
The output voltage ranges are 0 V to +5 V, 0 V to +10 V (single supply), and ±5 V (dual supply).
- What type of reference voltage does the AD7245AAN use?
The AD7245AAN uses an on-chip 5 V buried Zener diode as its reference voltage.
- Does the AD7245AAN require external user trims for full performance?
No, the AD7245AAN does not require external user trims to achieve full specified performance.
- What are the control signals used in the AD7245AAN?
The control signals include CS (Chip Select), WR (Write), LDAC (Load DAC), and CLR (Clear).
- What is the significance of the LDAC signal in the AD7245AAN?
The LDAC signal is an asynchronous input that transfers data from the input latch to the DAC latch and updates the analog output.
- What is the purpose of the CLR signal in the AD7245AAN?
The CLR signal allows features such as power-on reset to be implemented by clearing the contents of the DAC latch.
- What is the digital feedthrough figure for the AD7245AAN?
The digital feedthrough figure is 10 nV-s in a 5 V output range.
- What types of packages are available for the AD7245AAN?
The AD7245AAN is available in 24-pin DIP, SOIC, and 28-terminal surface mount packages.
- Is the AD7245AAN microprocessor compatible?
