Overview
The AD7302BRZ-REEL, produced by Analog Devices Inc., is a dual, 8-bit voltage output Digital-to-Analog Converter (DAC) designed for high-performance applications. It operates from a single supply voltage ranging from 2.7 V to 5.5 V and features a parallel microprocessor and DSP-compatible interface. The on-chip precision output buffers enable the DAC outputs to swing rail-to-rail, making it suitable for a variety of applications, especially in portable battery-operated equipment due to its low power consumption.
Key Specifications
| Parameter | Value | Units | 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 | V | min to max |
| REFIN Input Impedance | 10 MΩ typ | Ω | - |
| Supply Voltage | +2.7 V to +5.5 V | V | - |
| Power Consumption @ 3.3 V | < 10 mW | mW | - |
| Power-Down Current @ 25°C | < 1 µA | µA | - |
| Package Types | 20-Lead DIP, SOIC, TSSOP | - | - |
Key Features
- Parallel microprocessor and DSP-compatible interface with high speed registers and double buffered interface logic.
- On-chip precision output buffers allowing rail-to-rail operation with a settling time of typically 1.2 µs.
- Internal or external reference capability.
- Low power consumption: less than 10 mW at 3.3 V and reducing to 3 µW in power-down mode.
- Power-down function reducing current consumption to less than 1 µA at 25°C.
- Available in 20-lead DIP, SOIC, and TSSOP packages.
Applications
- Portable battery-powered instruments.
- Digital gain and offset adjustment.
- Programmable voltage and current sources.
- Programmable attenuators.
Q & A
- What is the resolution of the AD7302BRZ-REEL DAC? The resolution is 8 bits.
- What is the operating voltage range of the AD7302BRZ-REEL? The operating voltage range is from +2.7 V to +5.5 V.
- What types of packages are available for the AD7302BRZ-REEL? It is available in 20-lead DIP, SOIC, and TSSOP packages.
- How does the power-down function work on the AD7302BRZ-REEL? The power-down function reduces the current consumption to less than 1 µA at 25°C.
- Can the AD7302BRZ-REEL use both internal and external references? Yes, it can use both internal and external references.
- What is the typical settling time for the DAC outputs? The typical settling time is 1.2 µs.
- Is the AD7302BRZ-REEL suitable for portable battery-operated equipment? Yes, it is ideally suited due to its low power consumption.
- How are the DAC outputs updated? The DAC outputs can be simultaneously updated using the asynchronous LDAC input.
- What is the purpose of the CLR input? The CLR input clears the DAC registers and sets the DAC outputs to zero volts when taken low.
- What is the maximum power consumption at 3.3 V? The maximum power consumption is less than 10 mW at 3.3 V.
