Overview
The AD7391AR-REEL7, produced by Analog Devices Inc., is a 10-bit serial-input micropower digital-to-analog converter (DAC). This device is part of the AD7390/AD7391 family, which includes both 10-bit and 12-bit versions. The AD7391 operates from a single 3 V supply and is designed for low power consumption, making it ideal for battery-operated applications. It features a voltage-switched, laser-trimmed DAC, rail-to-rail output op amps, a serial-input register, and a DAC register. The device is built using a CBCMOS process, ensuring low cost and ease of use in single-supply 3 V systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 10-bit | |
| Supply Voltage Range | 2.7 to 5.5 | V |
| Supply Current (Typical) | 55 | µA |
| Supply Current (Maximum) | 100 | µA |
| Settling Time | 70 | µs |
| Output Slew Rate | 0.05 | V/µs |
| Digital Interface | SPI and QSPI compatible | |
| Package Type | 8-SOIC | |
| RoHS Compliance | Not Compliant (specific models may vary) |
Key Features
- Low power consumption: Less than 100 µA supply current, making it suitable for battery-operated applications.
- Single-supply operation: Operates from a single supply voltage in the range of 2.7 V to 5.5 V.
- Rail-to-rail output: The output voltage can range from 0 to VDD.
- SPI and QSPI compatible serial interface: High-speed, 3-wire serial-data interface with Schmitt trigger inputs.
- CLR pin for reset: Allows resetting the DAC register to zero-scale, useful for power-on reset or system failure recovery.
- Constant reference input resistance: Independent of the digital code setting of the DAC.
Applications
- Automotive systems: Suitable for automotive applications due to its robust and low-power design.
- Portable communications: Ideal for portable communication devices requiring low power consumption.
- Digitally controlled calibration: Used in applications requiring precise digital control over analog outputs.
- Battery-operated devices: Perfect for devices that need to operate on low power and have a long battery life.
Q & A
- What is the resolution of the AD7391AR-REEL7?
The AD7391AR-REEL7 has a 10-bit resolution.
- What is the supply voltage range for the AD7391AR-REEL7?
The supply voltage range is from 2.7 V to 5.5 V.
- What is the typical supply current of the AD7391AR-REEL7?
The typical supply current is 55 µA.
- What is the settling time of the AD7391AR-REEL7?
The settling time is 70 µs.
- What type of digital interface does the AD7391AR-REEL7 use?
The device uses an SPI and QSPI compatible serial interface.
- What is the package type of the AD7391AR-REEL7?
The package type is 8-SOIC.
- Is the AD7391AR-REEL7 RoHS compliant?
Specific models may vary, but the AD7391AR-REEL7 is generally not RoHS compliant.
- What is the purpose of the CLR pin on the AD7391AR-REEL7?
The CLR pin is used to reset the DAC register to zero-scale, which is useful for power-on reset or system failure recovery.
- How does the reference input work on the AD7391AR-REEL7?
The reference input has constant resistance independent of the digital code setting of the DAC, and it can be tied to the same supply voltage as VDD.
- What are some common applications of the AD7391AR-REEL7?
Common applications include automotive systems, portable communications, digitally controlled calibration, and battery-operated devices.
