Overview
The AD7249BRZ, 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 with on-chip voltage reference and output amplifiers. It is designed for easy connection to microcomputers and 16-bit digital signal processors via a serial interface, minimizing pin count and package size. The AD7249BRZ operates with single or dual supply configurations, offering output voltage ranges of 0 V to +5 V, 0 V to +10 V, and ±5 V. This device is particularly useful in applications requiring precise analog output control with minimal external components.
Key Specifications
| Parameter | Value | Unit | Test Conditions |
|---|---|---|---|
| Resolution | 12 | Bits | TMIN to TMAX |
| 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 | - | Single or dual supply operation |
| Output Amplifier Capability | +10 V across a 2 kΩ load | - | - |
| DAC Update Rate | 125 kHz | - | Serial data rate up to 2 MHz |
| Package Types | 16-Lead DIP, 16-Lead SOIC Wide | - | - |
Key Features
- Two complete 12-bit voltage-output DACs 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 allowing easy connection to microcomputers and 16-bit digital signal processors.
- Minimum 3-wire interface to most DSP processors and microcontrollers.
- DAC update rate of 125 kHz with serial data rates up to 2 MHz.
- CLR function for power-on reset, setting outputs to a known voltage level.
- Small package size: 16-Lead DIP and 16-Lead SOIC Wide.
- Low power dissipation).
Applications
- Process Control: The AD7249BRZ is suitable for precise control in industrial processes due to its high resolution and accuracy).
- Industrial Automation: It can be used in various automation systems requiring analog output control).
- Digital Signal Processing Systems: The component is compatible with most DSP processors and microcontrollers, making it ideal for DSP applications).
- Input/Output Ports: The AD7249BRZ can be integrated into systems requiring multiple analog output channels).
Q & A
- What is the resolution of the AD7249BRZ DAC?
The AD7249BRZ has a resolution of 12 bits).
- What are the output voltage ranges of the AD7249BRZ?
The output voltage ranges are 0 V to +5 V, 0 V to +10 V, and ±5 V, depending on the supply configuration).
- How does the AD7249BRZ interface with other devices?
The AD7249BRZ interfaces via a serial interface, allowing easy connection to microcomputers and 16-bit digital signal processors).
- What is the maximum DAC update rate of the AD7249BRZ?
The maximum DAC update rate is 125 kHz, with serial data rates up to 2 MHz).
- What package types are available for the AD7249BRZ?
The AD7249BRZ is available in 16-Lead DIP and 16-Lead SOIC Wide packages).
- Does the AD7249BRZ require external trims for full performance?
No, the AD7249BRZ does not require external trims to achieve full specified performance).
- What is the purpose of the CLR function in the AD7249BRZ?
The CLR function sets the output to a known voltage level, useful as a power-on reset).
- In which applications is the AD7249BRZ commonly used?
The AD7249BRZ is commonly used in process control, industrial automation, digital signal processing systems, and input/output ports).
- What is the power dissipation characteristic of the AD7249BRZ?
The AD7249BRZ has low power dissipation).
- How many bits are in the data stream for the AD7249BRZ?
The data stream consists of 16 bits, with DB15 to DB13 as don’t care bits, DB12 as the channel select bit, and DB11 to DB0 containing the data to update the DAC).
