Overview
The AD7237AARZ-REEL7, produced by Analog Devices Inc., is an enhanced version of the industry-standard AD7237/AD7247 dual 12-bit digital-to-analog converters (DACs). This component is a complete, dual, 12-bit, voltage output 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 AD7237AARZ-REEL7 is designed for operation from 12 V to 15 V supplies, features faster interface times, and has improved reference variations and settling times.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 12 bits |
| Output Type | Voltage Output |
| Power Supply Range | 12 V to 15 V |
| Output Ranges (Single Supply) | 0 V to +5 V, 0 V to +10 V |
| Output Ranges (Dual Supply) | 0 V to +5 V, 0 V to +10 V, ±5 V |
| Output Amplifier Capability | +10 V across a 2 kΩ load to GND |
| Interface Structure | Double Buffered Byte Loading (AD7237A), Parallel Data Loading (AD7247A) |
| Package Type | 24-Lead SOIC (Wide) |
| Compatibility | Microprocessor compatible with high speed data latches and interface logic |
Key Features
- Complete dual 12-bit DAC with output amplifiers and Zener voltage reference on a single CMOS chip.
- No external user trims required for full specified performance.
- Faster interface times and better reference variations with VDD.
- Faster settling times compared to previous models.
- REF OUT/REF IN function allows use of either on-chip 5 V reference or an external reference.
- Asynchronous LDAC signal for updating DAC latches and analog outputs independently of WR input.
- Microprocessor compatible with high speed data latches and interface logic.
Applications
- Industrial control systems requiring precise analog output control.
- Aerospace and defense applications where reliability and precision are critical.
- Medical devices that need accurate voltage output for various diagnostic and therapeutic functions.
- Automotive systems for sensor calibration and control.
- Telecommunication equipment for signal processing and transmission.
Q & A
- What is the resolution of the AD7237AARZ-REEL7?
The AD7237AARZ-REEL7 has a resolution of 12 bits.
- What is the power supply range for the AD7237AARZ-REEL7?
The power supply range is from 12 V to 15 V.
- What are the output ranges available for the AD7237AARZ-REEL7?
For single supply operation, the output ranges are 0 V to +5 V and 0 V to +10 V. With dual supplies, additional ±5 V range is available.
- How does the AD7237AARZ-REEL7 interface with microprocessors?
The AD7237AARZ-REEL7 is microprocessor compatible with high speed data latches and interface logic, supporting both 8-bit and 16-bit data bus structures.
- 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 LDAC signal work on the AD7237AARZ-REEL7?
The LDAC signal is asynchronous and updates the DAC latches and analog outputs independently of the WR input, useful for simultaneous updating of multiple AD7237As.
- What package type is the AD7237AARZ-REEL7 available in?
The AD7237AARZ-REEL7 is available in a 24-Lead SOIC (Wide) package.
- Does the AD7237AARZ-REEL7 require external user trims?
No, the AD7237AARZ-REEL7 does not require external user trims to achieve full specified performance.
- What are some typical applications of the AD7237AARZ-REEL7?
Typical applications include industrial control systems, aerospace and defense, medical devices, automotive systems, and telecommunication equipment.
- Is the AD7237AARZ-REEL7 fabricated using a specific process?
Yes, it is fabricated in Linear Compatible CMOS (LCMOS), combining precision bipolar circuits with low power CMOS logic.
