Overview
The AD7302BRZ, produced by Analog Devices Inc., is a dual, 8-bit voltage output Digital-to-Analog Converter (DAC) designed to operate from a single supply voltage ranging from +2.7 V to +5.5 V. This component features on-chip precision output buffers that enable the DAC outputs to swing rail-to-rail, making it suitable for a variety of applications requiring high accuracy and low power consumption.
The AD7302BRZ is available in a 20-lead SOIC package and is characterized by its high-speed parallel interface, which is compatible with microprocessors and DSPs. The device includes double-buffered interface logic, allowing data to be loaded into the registers on the rising edge of the CS or WR signals. The A/B pin selects either DAC A or DAC B for data writing.
Key Specifications
| Parameter | Value | Units | Conditions/Comments |
|---|---|---|---|
| Resolution | 8 Bits | ||
| Supply Voltage | +2.7 V to +5.5 V | ||
| Relative Accuracy | ±1 LSB max | ||
| 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 | ||
| Settling Time | 1.2 µs typ | ||
| Power Consumption @ 3.3 V | < 10 mW | ||
| Power-Down Current @ 25°C | < 1 µA | ||
| Package Type | 20-Lead SOIC |
Key Features
- Dual 8-bit voltage output DACs in a single package.
- On-chip precision output buffers allowing rail-to-rail output swing.
- High-speed parallel interface compatible with microprocessors and DSPs.
- Double-buffered interface logic for efficient data loading.
- Internal or external reference capability.
- Asynchronous LDAC input for simultaneous updating of both DACs.
- Asynchronous CLR input for clearing DAC registers to zero.
- Low power consumption: less than 10 mW at 3.3 V and less than 1 µA in power-down mode.
- 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?
The AD7302BRZ has a resolution of 8 bits.
- What is the operating voltage range of the AD7302BRZ?
The AD7302BRZ operates from a single supply voltage ranging from +2.7 V to +5.5 V.
- What types of packages are available for the AD7302BRZ?
The AD7302BRZ is available in 20-lead DIP, SOIC, and TSSOP packages.
- How does the AD7302BRZ handle power consumption?
The AD7302BRZ consumes less than 10 mW at 3.3 V and reduces to less than 1 µA in power-down mode.
- What is the settling time of the AD7302BRZ?
The settling time of the AD7302BRZ is typically 1.2 µs.
- Can the AD7302BRZ use an external reference?
Yes, the AD7302BRZ can use either an internal reference derived from VDD or an external reference applied at the REFIN pin.
- How are the DAC outputs updated in the AD7302BRZ?
The DAC outputs can be simultaneously updated using the asynchronous LDAC input.
- How can the DAC registers be cleared in the AD7302BRZ?
The DAC registers can be cleared by using the asynchronous CLR input.
- What is the significance of the A/B pin in the AD7302BRZ?
The A/B pin is used to select whether data is written to DAC A or DAC B.
- Is the AD7302BRZ suitable for battery-powered devices?
Yes, the AD7302BRZ is ideally suited for portable battery-operated equipment due to its low power consumption.
