Overview
The AD7391ARU, produced by Analog Devices Inc., is a 10-bit voltage-output digital-to-analog converter (DAC) designed for single-supply operation. It is part of the AD7390/AD7391 family, which includes both 10-bit and 12-bit resolution options. Built using a CBCMOS process, this monolithic DAC offers low cost and ease of use in single-supply 3 V systems. It operates over a supply voltage range of 2.7 V to 5.5 V, consuming less than 100 µA, making it ideal for battery-operated applications. The device features a rail-to-rail output and a high-speed, three-wire SPI and microcontroller-compatible serial interface.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 10 bits |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Current Consumption | < 100 µA |
| Output Type | Voltage - Buffered |
| Differential Output | No |
| Settling Time | 70 µs (typ) |
| Temperature Range | -40°C to +85°C (industrial), -40°C to +125°C (automotive for AD7391AR) |
| Package Options | Plastic DIP, SO-8, TSSOP-8 |
| Interface | SPI and microcontroller compatible, 3-wire (SDI, CLK, LD) |
Key Features
- Low power consumption: Less than 100 µA, ideal for battery-operated applications.
- High-speed, three-wire SPI and microcontroller-compatible serial interface.
- Rail-to-rail output: Full-scale voltage set equal to the positive supply VDD or any value in between.
- Doubled-buffered serial-data interface: Allows preloading of a new data value without disturbing the present DAC values.
- CLR input: Sets the output to zero scale at power on or upon user demand.
- Wide temperature range: Specified over the extended industrial (-40°C to +85°C) and automotive (-40°C to +125°C for AD7391AR) temperature ranges.
- Compact packaging: Available in plastic DIP, SO-8, and TSSOP-8 packages.
Applications
- Industrial Automation: Converts digital control signals from a programmable logic controller (PLC) into analog signals for driving actuators or controlling process variables in industrial machinery.
- Audio Equipment: Converts digital audio signals into analog signals for amplification and speaker output, ensuring high fidelity audio reproduction.
- Medical Devices: Converts digital signals from sensors or measurement devices into analog signals for processing or display, such as in medical monitoring systems.
- Automotive: Suitable for automotive applications due to its extended temperature range and low power consumption.
- Portable Communications: Ideal for portable communication devices due to its low power consumption and compact size.
Q & A
- What is the resolution of the AD7391ARU?
The AD7391ARU has a resolution of 10 bits.
- What is the supply voltage range for the AD7391ARU?
The supply voltage range is from 2.7 V to 5.5 V.
- How much current does the AD7391ARU consume?
The device consumes less than 100 µA.
- What type of output does the AD7391ARU provide?
The output is a voltage-buffered output.
- Does the AD7391ARU support differential output?
No, it does not support differential output.
- What is the settling time of the AD7391ARU?
The settling time is typically 70 µs.
- What are the package options available for the AD7391ARU?
It is available in plastic DIP, SO-8, and TSSOP-8 packages.
- What type of interface does the AD7391ARU use?
It uses a high-speed, three-wire SPI and microcontroller-compatible serial interface.
- What is the purpose of the CLR input on the AD7391ARU?
The CLR input sets the output to zero scale at power on or upon user demand.
- In what temperature range is the AD7391ARU specified?
It is specified over the extended industrial (-40°C to +85°C) and automotive (-40°C to +125°C for AD7391AR) temperature ranges.
