Overview
The AD7391AR is a 10-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc. This device is designed for single-supply operation and is ideal for applications requiring low power consumption and high precision. The AD7391AR operates from a supply voltage range of 2.7V to 5.5V, making it suitable for battery-operated devices and other low-power systems. It features a serial interface compatible with SPI and QSPI, and its rail-to-rail output allows for a full-scale voltage set equal to the positive supply voltage or any value in between.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 10 |
| Number of D/A Converters | 1 |
| Output Type | Voltage - Buffered |
| Differential Output | No |
| Data Interface | SPI, QSPI |
| Reference Type | External |
| Voltage - Supply, Analog | 2.7V ~ 5.5V |
| Voltage - Supply, Digital | 2.7V ~ 5.5V |
| Settling Time | 70μs (Typ) |
| Integral Nonlinearity (INL) | ±2 LSB (Max) |
| Differential Nonlinearity (DNL) | ±0.9 LSB (Max) |
| Architecture | R-2R |
| Operating Temperature | -40°C ~ 125°C |
| Package / Case | 8-SOIC (0.154, 3.90mm Width) |
| Number of Pins | 8 |
| Max Supply Voltage | 5.5V |
| Min Supply Voltage | 2.7V |
| Nominal Supply Current | 55μA |
| Power Dissipation | 500μW |
Key Features
- Low power consumption: Less than 100μA of current.
- Single-supply operation: Compatible with supply voltages from 2.7V to 5.5V.
- High precision: 10-bit resolution with ±2 LSB INL and ±0.9 LSB DNL.
- Rail-to-rail output: Full-scale voltage output can be set equal to the positive supply voltage or any value in between.
- SPI and QSPI compatible serial interface.
- External reference input with constant input resistance.
- Low dropout voltage regulators and proper decoupling capacitors recommended for stable power supply.
- Thermal management and output filtering options for enhanced performance.
Applications
The AD7391AR is suitable for a variety of applications, including:
- Precision instrumentation: For generating accurate analog voltage outputs in tasks such as sensor signal conditioning.
- Industrial control systems: For motor control and other industrial automation tasks.
- Automotive systems: Due to its wide operating temperature range and low power consumption.
- Portable communications: Ideal for battery-operated devices requiring low power and high precision.
- Digitally controlled calibration: For applications requiring precise analog output adjustments.
Q & A
- What is the resolution of the AD7391AR DAC?
The AD7391AR has a 10-bit resolution. - What is the operating supply voltage range of the AD7391AR?
The AD7391AR operates from a supply voltage range of 2.7V to 5.5V. - What type of interface does the AD7391AR use?
The AD7391AR uses an SPI and QSPI compatible serial interface. - What is the settling time of the AD7391AR?
The settling time of the AD7391AR is typically 70μs. - Is the AD7391AR suitable for battery-operated devices?
Yes, the AD7391AR is suitable for battery-operated devices due to its low power consumption of less than 100μA. - What is the maximum output voltage of the AD7391AR?
The maximum output voltage of the AD7391AR is 5.5V. - Does the AD7391AR have differential output?
No, the AD7391AR does not have differential output. - What is the reference type of the AD7391AR?
The AD7391AR has an external reference type. - How many D/A converters does the AD7391AR have?
The AD7391AR has one D/A converter. - What is the package type of the AD7391AR?
The AD7391AR comes in an 8-SOIC package.
