Overview
The AD7390AR, produced by Analog Devices Inc., is a 12-bit voltage-output digital-to-analog converter (DAC) designed to operate from a single 3 V supply. Built using a CBCMOS process, this monolithic DAC offers low cost and ease of use in single-supply 3 V systems. It is ideal for battery-operated applications due to its low power consumption of less than 100 µA over a supply voltage range of 2.7 V to 5.5 V. The device features a rail-to-rail output, allowing the full-scale voltage to be set equal to the positive supply voltage or any value in between.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 12-bit | |
| Supply Voltage Range | 2.7 V to 5.5 V | V |
| Power Consumption | < 100 µA | µA |
| Output Voltage Range | 0 to VDD | V |
| Interface | SPI and QSPI compatible | |
| Temperature Range | -40°C to +85°C (extended industrial) | °C |
| Package Options | 8-Lead PDIP, 8-Lead SOIC, 8-Lead TSSOP |
Key Features
- Low power consumption: Less than 100 µA, making it suitable for battery-operated applications.
- Rail-to-rail output: Allows the full-scale voltage to be set equal to the positive supply voltage or any value in between.
- SPI and QSPI compatible serial interface: High-speed, three-wire interface with data in (SDI), clock (CLK), and load strobe (LD) pins.
- CLR input: Resets the DAC register to zero scale at power on or upon user demand.
- Pin compatibility: The AD7390 and AD7391 have the same pinout, allowing users to select the resolution without circuit card redesign.
Applications
- Automotive: Suitable for automotive applications due to its extended temperature range and low power consumption.
- Portable Communications: Ideal for devices requiring low power and high precision.
- Digitally Controlled Calibration: Useful in applications requiring precise calibration.
- Battery-Operated Devices: Suitable for any device that requires low power consumption and high precision.
Q & A
- What is the resolution of the AD7390AR?
The AD7390AR has a 12-bit resolution.
- What is the supply voltage range for the AD7390AR?
The supply voltage range is from 2.7 V to 5.5 V.
- How much power does the AD7390AR consume?
The device consumes less than 100 µA.
- What is the output voltage range of the AD7390AR?
The output voltage range is from 0 to VDD.
- What type of interface does the AD7390AR use?
The device uses an SPI and QSPI compatible serial interface.
- What are the temperature ranges for the AD7390AR?
The device is specified over the extended industrial temperature range of -40°C to +85°C.
- In what packages is the AD7390AR available?
The device is available in 8-Lead PDIP, 8-Lead SOIC, and 8-Lead TSSOP packages.
- What is the purpose of the CLR input on the AD7390AR?
The CLR input resets the DAC register to zero scale at power on or upon user demand.
- Is the AD7390AR pin-compatible with other models?
Yes, the AD7390 and AD7391 have the same pinout, allowing users to select the resolution without circuit card redesign.
- What are some common applications for the AD7390AR?
Common applications include automotive, portable communications, digitally controlled calibration, and battery-operated devices.
