Overview
The AD7248AANZ is a 12-bit digital-to-analog converter (DAC) produced by Analog Devices Inc. It is part of the AD7245A/AD7248A family, which offers enhanced performance over previous models. This DAC features a voltage output, an on-chip output amplifier, and a Zener voltage reference on a monolithic CMOS chip. The device is designed to operate without requiring external user trims to achieve full specified performance. It is microprocessor compatible, with high-speed data latches and double-buffered interface logic, making it suitable for a wide range of applications.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Resolution | 12 bits | |||
| Power Supply Range | 12 V | 15 V | V | |
| Output Voltage Ranges | 0 V to +5 V, 0 V to +10 V, ±5 V (dual supplies) | V | ||
| Linearity Grade | ±1/2 LSB | |||
| Interface Times | Faster interface times compared to previous models | |||
| Temperature Range | Extended temperature range for commercial and industrial grades | |||
| Package Types | 20-Lead PDIP, 20-Lead SOIC (Wide), 20-Lead Flatpack | |||
Key Features
- Complete 12-bit DAC with output amplifier and Zener voltage reference on a single CMOS chip.
- No external user trims required for full specified performance.
- Microprocessor compatible with high-speed data latches and double-buffered interface logic.
- 8-bit wide data bus with data loaded in two write operations.
- Asynchronous LDAC signal for transferring data from the input latch to the DAC latch.
- On-chip 5 V buried Zener diode for a low noise, temperature-compensated reference.
- Output amplifiers capable of developing +10 V across a 2 kOhm load to GND.
- Fabricated in linear compatible CMOS (LC²MOS) process combining precision bipolar circuits with low power CMOS logic.
Applications
- Industrial control systems.
- Aerospace and defense systems.
- Medical devices requiring precise analog output.
- Automotive systems needing reliable and accurate DACs.
- Any application requiring high precision and reliability in digital-to-analog conversion.
Q & A
- What is the resolution of the AD7248AANZ DAC?
The AD7248AANZ has a 12-bit resolution.
- What are the available output voltage ranges for the AD7248AANZ?
The output voltage ranges are 0 V to +5 V, 0 V to +10 V, and ±5 V (with dual supplies).
- Does the AD7248AANZ require external user trims for full performance?
No, the AD7248AANZ does not require external user trims to achieve full specified performance.
- How is data loaded into the AD7248AANZ?
Data is loaded into the AD7248AANZ through an 8-bit wide data bus in two write operations.
- What is the purpose of the LDAC signal in the AD7248AANZ?
The LDAC signal is an asynchronous input that transfers data from the input latch to the DAC latch and updates the analog output.
- What type of process is used to fabricate the AD7248AANZ?
The AD7248AANZ is fabricated in linear compatible CMOS (LC²MOS) process.
- What are the package options available for the AD7248AANZ?
The AD7248AANZ is available in 20-Lead PDIP, 20-Lead SOIC (Wide), and 20-Lead Flatpack packages.
- What is the temperature range for the AD7248AANZ?
The AD7248AANZ has an extended temperature range for commercial and industrial grades.
- Is the AD7248AANZ microprocessor compatible?
- What is the reference voltage source for the AD7248AANZ?
The reference voltage for the AD7248AANZ is provided by an on-chip 5 V buried Zener diode.
