Overview
The AD7247ABR-REEL, produced by Analog Devices Inc., is an enhanced version of the industry-standard AD7247. This component is a complete, dual, 12-bit, voltage output digital-to-analog converter (DAC) with output amplifiers and a Zener voltage reference integrated on a monolithic CMOS chip. It offers significant space savings and increased reliability compared to multichip designs. The AD7247ABR-REEL is designed for easy interfacing with most modern microprocessors, supporting both 8-bit and 16-bit data bus structures. It operates over a wide power supply range, from 12 V to 15 V, and features faster interface times and better reference variations with VDD.
Key Specifications
| Parameter | Description |
|---|---|
| Resolution | 12-bit |
| Output Voltage Ranges | 0 V to +5 V, 0 V to +10 V, ±5 V |
| Power Supply Range | 12 V to 15 V |
| Interface Type | Parallel (AD7247A), Double Buffered (AD7237A) |
| Data Bus Width | 12-bit parallel (AD7247A), 8-bit wide data bus (AD7237A) |
| Output Amplifier Capability | Capable of developing +10 V across a 2 kΩ load to GND |
| Operating Temperature Range | –40°C to +85°C (AD7247ABR) |
| Package Type | Small Outline (SOIC) |
Key Features
- Dual 12-bit DACPORT® on a single chip, offering space savings and increased reliability.
- Microprocessor compatible with high-speed data latches and interface logic.
- Faster interface times and better reference variations with VDD.
- No external user trims required to achieve full specified performance.
- REF OUT/REF IN function allows use of either on-chip 5 V reference or an external reference.
- Asynchronous LDAC signal updates DAC latches and analog outputs (AD7237A).
- ESD protection circuitry to prevent damage from electrostatic discharges.
Applications
- Industrial control systems requiring precise analog output.
- Aerospace and defense applications where reliability and precision are critical.
- Medical devices that need accurate and stable analog signals.
- Automotive systems requiring robust and reliable DACs.
- Test and measurement equipment where high-resolution DACs are essential.
Q & A
- What is the resolution of the AD7247ABR-REEL?
The AD7247ABR-REEL has a 12-bit resolution.
- What are the available output voltage ranges for the AD7247ABR-REEL?
The available output voltage ranges are 0 V to +5 V, 0 V to +10 V, and ±5 V.
- What is the power supply range for the AD7247ABR-REEL?
The power supply range is from 12 V to 15 V.
- How does the AD7247ABR-REEL interface with microprocessors?
The AD7247ABR-REEL is microprocessor compatible with high-speed data latches and interface logic, supporting both 8-bit and 16-bit data bus structures.
- Does the AD7247ABR-REEL require external user trims for full performance?
No, the AD7247ABR-REEL does not require external user trims to achieve full specified performance.
- What is the purpose of the REF OUT/REF IN function?
The REF OUT/REF IN function allows either the on-chip 5 V reference or an external reference to be used as the reference voltage for the part.
- How does the asynchronous LDAC signal function on the AD7237A?
The asynchronous LDAC signal on the AD7237A updates the DAC latches and analog outputs.
- What kind of ESD protection does the AD7247ABR-REEL have?
The AD7247ABR-REEL features proprietary ESD protection circuitry to prevent damage from electrostatic discharges.
- What are the operating temperature ranges for the AD7247ABR-REEL?
The operating temperature range for the AD7247ABR-REEL is –40°C to +85°C.
- What package type is the AD7247ABR-REEL available in?
The AD7247ABR-REEL is available in a Small Outline (SOIC) package.
