Overview
The AD7249BNZ, produced by Analog Devices Inc., is a dual 12-bit serial digital-to-analog converter (DAC) integrated into a single monolithic CMOS chip. This device features two complete voltage-output DACs with on-chip voltage reference and output amplifiers, making it suitable for a variety of applications requiring precise analog output. The AD7249BNZ operates with either single or dual supply configurations, offering output voltage ranges of 0 V to +5 V, 0 V to +10 V, and ±5 V. It is designed for easy interface with microcomputers and 16-bit digital signal processors through a serial interface, minimizing pin count and package size.
Key Specifications
| Parameter | Value | Unit | Test Conditions |
|---|---|---|---|
| Resolution | 12 | Bits | - |
| Relative Accuracy | ±1/2 LSB max | - | TMIN to TMAX |
| Differential Nonlinearity | ±1 LSB max | - | TMIN to TMAX |
| Output Voltage Ranges | 0 V to +5 V, 0 V to +10 V, ±5 V | V | Single or dual supply operation |
| Load Capability | +10 V across a 2 kΩ load | V/Ω | - |
| Serial Interface Clock Rate | Up to 2 MHz | Hz | - |
| DAC Update Rate | 125 kHz | Hz | - |
| Package Types | 16-lead DIP, 16-lead SOIC | - | - |
Key Features
- Two complete 12-bit voltage-output DACs with on-chip voltage reference and output amplifiers.
- Single or dual supply operation with selectable output voltage ranges (0 V to +5 V, 0 V to +10 V, and ±5 V).
- Serial interface for easy connection to microcomputers and 16-bit digital signal processors.
- Minimum 3-wire interface.
- DAC update rate of 125 kHz.
- CLR function for power-on reset to a known voltage level.
- Low power dissipation.
- Small package size: 16-lead DIP and 16-lead SOIC.
Applications
- Process Control
- Industrial Automation
- Digital Signal Processing Systems
- Input/Output Ports
Q & A
- What is the resolution of the AD7249BNZ DAC?
The AD7249BNZ has a resolution of 12 bits. - What are the output voltage ranges of the AD7249BNZ?
The output voltage ranges are 0 V to +5 V, 0 V to +10 V, and ±5 V. - What types of packages are available for the AD7249BNZ?
The AD7249BNZ is available in 16-lead DIP and 16-lead SOIC packages. - What is the maximum serial interface clock rate for the AD7249BNZ?
The maximum serial interface clock rate is up to 2 MHz. - What is the DAC update rate of the AD7249BNZ?
The DAC update rate is 125 kHz. - Does the AD7249BNZ require external trims for full performance?
No, the AD7249BNZ does not require external trims to achieve full specified performance. - What is the purpose of the CLR function in the AD7249BNZ?
The CLR function sets the output to a known voltage level, useful as a power-on reset. - What are the typical applications of the AD7249BNZ?
Typical applications include process control, industrial automation, digital signal processing systems, and input/output ports. - How does the AD7249BNZ interface with microcontrollers and DSP processors?
The AD7249BNZ interfaces through a serial interface, minimizing pin count and allowing easy connection to most DSP processors and microcontrollers. - What is the load capability of the output amplifiers in the AD7249BNZ?
The output amplifiers are capable of developing +10 V across a 2 kΩ load.
