Overview
The AD7248AAP-REEL is a 12-bit, voltage output, digital-to-analog converter (DAC) produced by Analog Devices Inc. This component is part of the AD7245A/AD7248A family and is designed for high-performance applications requiring precise analog output. The AD7248A features an 8-bit-wide data bus, with data loaded into the input latch in two write operations. It includes an on-chip buried Zener diode for reference voltage and a highly stable, thin-film R–2R ladder network. The device is microprocessor compatible and offers high-speed data latches and double-buffered interface logic, making it suitable for a variety of digital-to-analog conversion tasks.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| Resolution | 12 bits | - | - |
| Data Bus Width | 8 bits | - | - |
| Supply Voltage (VDD) | +12 V to +15 V | V | - |
| Supply Voltage (VSS) | -12 V to -15 V | V | - |
| Analog Ground (AGND) | 0 V | V | - |
| Chip Select Pulsewidth (t1) | 55 ns (typ), 80 ns (min) | ns | TMIN to TMAX |
| Write Pulsewidth (t2) | 40 ns (typ), 80 ns (min) | ns | TMIN to TMAX |
| Chip Select to Write Setup Time (t3) | 0 ns (min) | ns | TMIN to TMAX |
| Chip Select to Write Hold Time (t4) | 0 ns (min) | ns | TMIN to TMAX |
| Data Valid to Write Setup Time (t5) | 40 ns (typ) | ns | - |
Key Features
- High-Speed Data Latches and Double-Buffered Interface Logic: Ensures microprocessor compatibility and efficient data transfer.
- On-Chip Buried Zener Diode Reference: Provides a stable reference voltage, eliminating the need for external references.
- Thin-Film R–2R Ladder Network: Offers high stability and precision in analog output.
- Extended Temperature Range Operation: Supports both commercial and industrial temperature ranges.
- No External User Trims Required: Achieves full specified performance without the need for external adjustments.
- Asynchronous LDAC Signal: Transfers data from the input latch to the DAC latch, updating the analog output).
Applications
The AD7248AAP-REEL is suitable for various applications requiring precise digital-to-analog conversion, including:
- Industrial Control Systems: For accurate control and monitoring in industrial environments.
- Medical Devices: Where precise analog outputs are crucial for diagnostic and therapeutic equipment.
- Aerospace and Defense: For applications requiring high reliability and precision in analog output.
- Automotive Systems: For control and monitoring in automotive electronics.
- Test and Measurement Equipment: For generating precise analog signals in testing and measurement applications.
Q & A
- What is the resolution of the AD7248AAP-REEL?
The AD7248AAP-REEL has a resolution of 12 bits.
- How is data loaded into the AD7248A?
Data is loaded into the AD7248A through an 8-bit-wide data bus in two write operations.
- What is the purpose of the LDAC signal?
The LDAC signal is an asynchronous input that transfers data from the input latch to the DAC latch, updating the analog output.
- Does the AD7248AAP-REEL require external user trims?
No, the AD7248AAP-REEL does not require external user trims to achieve full specified performance.
- What is the temperature range for the AD7248AAP-REEL?
The AD7248AAP-REEL supports both commercial and industrial temperature ranges.
- What type of reference voltage does the AD7248AAP-REEL use?
The AD7248AAP-REEL uses an on-chip buried Zener diode for reference voltage.
- Is the AD7248AAP-REEL microprocessor compatible?
Yes, the AD7248AAP-REEL is microprocessor compatible with high-speed data latches and double-buffered interface logic.
- What is the typical chip select pulsewidth for the AD7248AAP-REEL?
The typical chip select pulsewidth is 55 ns, with a minimum of 80 ns.
- What is the purpose of the CLR signal on the AD7245A?
The CLR signal on the AD7245A allows for features such as power-on reset to be implemented.
- Is the AD7248AAP-REEL still in production?
No, the AD7248AAP-REEL is no longer manufactured. View substitutes or alternative package types if needed.
