Overview
The AD7801BRZ-REEL7, produced by Analog Devices Inc., is a single, 8-bit, voltage output Digital-to-Analog Converter (DAC) designed for high precision and low power consumption. This component operates from a single supply voltage ranging from +2.7 V to +5.5 V, making it suitable for a variety of applications, especially in portable battery-operated devices.
The AD7801BRZ-REEL7 features an on-chip precision output buffer that allows the DAC output to swing rail-to-rail, ensuring high accuracy and stability. It also includes a parallel microprocessor and DSP compatible interface with high-speed registers and double-buffered interface logic.
Key Specifications
| Parameter | Value | Units | Conditions/Comments |
|---|---|---|---|
| Package | 20-SOIC (0.295, 7.50mm Width) | - | - |
| Number of Pins | 20 | - | - |
| Number of Bits | 8 | - | - |
| Settling Time | Typically 1.2 μs | μs | - |
| Integral Nonlinearity (INL) | 1 LSB | LSB | - |
| Polarity | Unipolar | - | - |
| Min Supply Voltage | 2.7 V | V | - |
| Max Supply Voltage | 5.5 V | V | - |
| Power Consumption | < 5 mW at 3.3 V, < 3 μW in power-down mode | mW/μW | - |
Key Features
- On-Chip Precision Output Buffer: Allows the DAC output to swing rail-to-rail, ensuring high accuracy and stability.
- Parallel Microprocessor and DSP Compatible Interface: Features high-speed registers and double-buffered interface logic for efficient data transfer.
- Internal and External Reference Capability: Reference selection can be either an internal reference derived from VDD or an external reference applied at the REFIN pin.
- Power-Down Function: Consumes less than 1 μA at 25°C in power-down mode, making it ideal for battery-operated devices.
- Low Power Operation: Typically consumes less than 5 mW at 3.3 V, reducing power consumption in active and standby modes.
- High Speed Registers: Data is loaded to the input register on the rising edge of CS or WR, ensuring fast operation.
- Asynchronous CLR Input: Allows the DAC output to be cleared asynchronously.
Applications
- Portable Battery Powered Instruments: Ideal for devices that require low power consumption and high precision.
- Digital Gain and Offset Adjustment: Can be used to adjust gain and offset in various digital systems.
- Programmable Voltage and Current Sources: Suitable for applications requiring programmable voltage or current outputs.
- Programmable Attenuators: Can be used in systems that require adjustable attenuation levels.
Q & A
- What is the supply voltage range for the AD7801BRZ-REEL7?
The AD7801BRZ-REEL7 operates from a single supply voltage ranging from +2.7 V to +5.5 V.
- What is the settling time of the AD7801BRZ-REEL7?
The settling time is typically 1.2 μs.
- Does the AD7801BRZ-REEL7 support both internal and external references?
Yes, it supports both internal and external references.
- What is the power consumption of the AD7801BRZ-REEL7 in active and power-down modes?
It consumes less than 5 mW at 3.3 V in active mode and less than 3 μW in power-down mode.
- What type of interface does the AD7801BRZ-REEL7 have?
It has a parallel microprocessor and DSP compatible interface with high-speed registers and double-buffered interface logic.
- How can the DAC output be cleared in the AD7801BRZ-REEL7?
The DAC output can be cleared using the asynchronous CLR input.
- What are the common applications of the AD7801BRZ-REEL7?
Common applications include portable battery-powered instruments, digital gain and offset adjustment, programmable voltage and current sources, and programmable attenuators.
- What is the package type of the AD7801BRZ-REEL7?
The AD7801BRZ-REEL7 is available in a 20-lead SOIC package.
- Is the AD7801BRZ-REEL7 suitable for battery-operated devices?
Yes, it is highly suitable due to its low power consumption and power-down mode.
- What is the maximum current consumption in power-down mode at 25°C?
The maximum current consumption in power-down mode at 25°C is less than 1 μA.
