Overview
The AD7249BR, produced by Analog Devices Inc., is a dual 12-bit serial Digital-to-Analog Converter (DAC) integrated into a single monolithic CMOS chip. This component features two complete voltage-output DACs, each with an on-chip voltage reference and output amplifiers. The AD7249BR is designed for easy integration with microcomputers and 16-bit digital signal processors through a serial interface, making it highly versatile for various applications.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Number of Bits | 12 | Per DAC channel | |
| Output Voltage Ranges | 0 V to +5 V, 0 V to +10 V, ±5 V | V | Depending on supply configuration |
| Supply Voltage | 11.4 V to 15.75 V | V | Dual supply operation |
| Settling Time | 10 μs | μs | To 1/2 LSB |
| Integral Nonlinearity (INL) | ±0.5 LSB | LSB | |
| Interface | Serial (SPI compatible) | Up to 2 MHz data rate | |
| DAC Update Rate | 125 kHz | kHz | |
| Package Type | 16-lead DIP, 16-lead SOIC | ||
| Operating Temperature Range | –40°C to +85°C (S Version: –55°C to +125°C) | °C |
Key Features
- Two complete 12-bit DAC channels with on-chip voltage reference and output amplifiers.
- Single or dual supply operation with output voltage ranges of 0 V to +5 V, 0 V to +10 V, and ±5 V.
- Serial interface compatible with SPI, allowing easy connection to microcomputers and 16-bit DSPs.
- DAC update rate of 125 kHz with a data rate up to 2 MHz.
- CLR function for power-on reset, setting outputs to a known voltage level.
- Low power dissipation and small package size (16-lead DIP and SOIC).
- Fabricated on linear compatible CMOS (LC2MOS) process.
Applications
- Process Control: Used in industrial control systems for precise analog output.
- Industrial Automation: Integral in automated systems requiring accurate voltage outputs.
- Digital Signal Processing Systems: Compatible with DSP processors for various signal processing tasks.
- Input/Output Ports: Utilized in systems requiring multiple analog output channels.
Q & A
- What is the resolution of the AD7249BR DAC?
The AD7249BR has a resolution of 12 bits per DAC channel.
- What are the available output voltage ranges for the AD7249BR?
The output voltage ranges are 0 V to +5 V, 0 V to +10 V, and ±5 V, depending on the supply configuration.
- What is the maximum data rate for the serial interface of the AD7249BR?
The serial interface supports data rates up to 2 MHz.
- What is the DAC update rate of the AD7249BR?
The DAC update rate is 125 kHz.
- What package types are available for the AD7249BR?
The AD7249BR is available in 16-lead DIP and 16-lead SOIC packages.
- What is the operating temperature range for the AD7249BR?
The operating temperature range is –40°C to +85°C, with the S version extending to –55°C to +125°C.
- Does the AD7249BR require external trims for full performance?
No, the AD7249BR does not require external trims to achieve full specified performance.
- What is the purpose of the CLR function in the AD7249BR?
The CLR function sets the output to a known voltage level, useful as a power-on reset.
- Is the AD7249BR compatible with DSP processors and microcontrollers?
- What is the settling time of the AD7249BR DACs?
The settling time is 10 μs to 1/2 LSB.
