Overview
The AD7945BR, produced by Analog Devices Inc., is a high-performance 12-bit multiplying Digital-to-Analog Converter (DAC) designed to operate from a single +3.3 V to +5 V supply. This device features a 12-bit parallel interface, making it suitable for applications requiring fast and precise analog output generation. The AD7945BR is part of the AD7943, AD7945, and AD7948 family, which replaces the industry-standard AD7543, AD7545, and AD7548 series with improved speed and power consumption characteristics.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Resolution | Number of bits | 12 bits |
| Interface | Type of data input format | Parallel, Offset Binary, Straight Binary |
| Supply Voltage | Operating voltage range | +3.3 V to +5.5 V |
| Power Consumption | Typical power consumption | 25 µW |
| Settling Time | Typical settling time to 0.01% | 600 ns |
| Integral Nonlinearity (INL) | Maximum INL | 0.5 LSB |
| Operating Temperature Range | Temperature range for operation | -40°C to 85°C |
| Package | Type of package | 20-pin SOIC, 20-pin SOP, 20-pin SSOP |
Key Features
- Fast Interface: The AD7945BR features a fast 12-bit parallel interface, enabling quick data transfer and conversion.
- Low Power Consumption: With a typical power consumption of 25 µW, this DAC is suitable for battery-powered and low-power applications.
- High Accuracy: The device offers high accuracy with a maximum Integral Nonlinearity (INL) of 0.5 LSB.
- Fast Settling Time: The DAC settles to 0.01% in 600 ns, making it ideal for applications requiring rapid analog output changes.
- Low Glitch: The AD7945BR has a low glitch energy of 60 nV-s, ensuring minimal disturbance during output transitions.
Applications
- Battery-Powered Instrumentation: The low power consumption makes it suitable for battery-powered devices.
- Laptop Computers: It can be used in laptop computers for various analog output requirements.
- Upgrades for 754x Series DACs: The AD7945BR is a superior replacement for the industry-standard AD7545 and AD7548 in many applications.
Q & A
- What is the resolution of the AD7945BR DAC?
The AD7945BR has a resolution of 12 bits.
- What types of interfaces does the AD7945BR support?
The AD7945BR supports a 12-bit parallel interface.
- What is the operating voltage range of the AD7945BR?
The operating voltage range is from +3.3 V to +5.5 V.
- How much power does the AD7945BR typically consume?
The typical power consumption is 25 µW.
- What is the settling time of the AD7945BR to 0.01% accuracy?
The settling time is 600 ns to 0.01% accuracy.
- What is the maximum Integral Nonlinearity (INL) of the AD7945BR?
The maximum INL is 0.5 LSB.
- What are the available package types for the AD7945BR?
The available packages are 20-pin SOIC, 20-pin SOP, and 20-pin SSOP.
- What is the operating temperature range of the AD7945BR?
The operating temperature range is from -40°C to 85°C.
- Is the AD7945BR suitable for battery-powered applications?
Yes, it is suitable due to its low power consumption.
- Can the AD7945BR replace older DAC models like the AD7545?
Yes, the AD7945BR can replace the industry-standard AD7545 and AD7548 in many applications.
