Overview
The AD7302BR, produced by Analog Devices Inc., is a dual, 8-bit voltage output Digital-to-Analog Converter (DAC) designed to operate from a single +2.7 V to +5.5 V supply. This component features on-chip precision output buffers that enable the DAC outputs to swing rail to rail, making it suitable for a wide range of applications. The AD7302BR has a parallel microprocessor and DSP-compatible interface with high-speed registers and double-buffered interface logic, allowing for efficient data loading and control. Its low power consumption and power-down capability make it ideal for portable battery-operated equipment.
Key Specifications
| Parameter | Value | Conditions/Comments |
|---|---|---|
| Resolution | 8 Bits | |
| Relative Accuracy | ±1 LSB max | Note 2 |
| Differential Nonlinearity | ±1 LSB max | Guaranteed Monotonic |
| Full-Scale Error | -0.75 LSB typ | |
| Zero Code Error @ 25°C | 3 LSB typ | All Zeroes Loaded to DAC Register |
| Gain Error | ±1 % FSR typ | |
| Zero Code Temperature Coefficient | 100 µV/°C typ | |
| REFIN Input Range | 1.0 to VDD/2 V | min to max |
| REFIN Input Impedance | 10 MΩ typ | |
| Settling Time | Typically 1.2 µs | |
| Power Supply Voltage | +2.7 V to +5.5 V | |
| Power Consumption @ 3.3 V | < 10 mW | Reducing to 3 µW in power-down mode |
| Operating Temperature | -40°C to 105°C | |
| Package Types | 20-Lead DIP, SOIC, TSSOP |
Key Features
- Low Power, Single Supply Operation: Operates from a single +2.7 V to +5.5 V supply, consuming less than 10 mW at 3.3 V and reducing to 3 µW in power-down mode.
- Rail-to-Rail Output: On-chip precision output buffers allow the DAC outputs to swing rail to rail with a settling time of typically 1.2 µs.
- Internal or External Reference Capability: Reference selection can be either an internal reference derived from VDD or an external reference applied at the REFIN pin.
- High Speed Parallel Interface: Parallel microprocessor and DSP-compatible interface with high-speed registers and double-buffered interface logic.
- Power-Down Capability: DAC consumes less than 1 µA at 25°C when powered down.
- Multiple Package Options: Available in 20-lead DIP, SOIC, and TSSOP packages.
Applications
- Portable Battery Powered Instruments: Ideal for battery-powered applications due to its low power consumption.
- Digital Gain and Offset Adjustment: Can be used for adjusting gain and offset in digital systems.
- Programmable Voltage and Current Sources: Suitable for applications requiring programmable voltage and current sources.
- Programmable Attenuators: Can be used to emulate digital potentiometers and programmable attenuators.
- Video Processing: Converts digital video signals into analog signals for display and transmission.
- Test and Measurement: Used in various testing and measurement equipment such as oscilloscopes and signal generators.
- Industrial Control: Used in control systems and devices such as motor control and automatic control systems.
- LED Drivers: Controls the intensity and color of LEDs in various lighting systems).
Q & A
- What is the resolution of the AD7302BR DAC?
The AD7302BR has a resolution of 8 bits.
- What is the operating voltage range of the AD7302BR?
The AD7302BR operates from a single +2.7 V to +5.5 V supply).
- What types of packages are available for the AD7302BR?
The AD7302BR is available in 20-lead DIP, SOIC, and TSSOP packages).
- What is the power consumption of the AD7302BR at 3.3 V?
The power consumption is less than 10 mW at 3.3 V, reducing to 3 µW in power-down mode).
- Can the AD7302BR use both internal and external references?
- What is the settling time of the AD7302BR DAC outputs?
The settling time is typically 1.2 µs).
- Is the AD7302BR suitable for portable battery-operated equipment?
- What is the operating temperature range of the AD7302BR?
- Can the AD7302BR be used in video processing applications?
- Is the AD7302BR RoHS compliant?
