Overview
The AD7237AARZ, 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 improvements over its predecessors, including operation from 12 V to 15 V supplies, faster interface times, and better reference variations. The AD7237AARZ is designed for microprocessor compatibility with high-speed data latches and interface logic, making it suitable for a wide range of applications requiring precise analog output control.
Key Specifications
| Parameter | Value |
|---|---|
| Resolution | 12-bit |
| Output Type | Voltage - Buffered |
| Package | 24-SOIC (0.295, 7.50mm Width) |
| Pin Count | 24 |
| Supply Voltage Range | ±10.8V to ±16.5V (Dual Supply), 10.8V to 15V (Single Supply) |
| Settling Time | 8μs |
| Integral Nonlinearity (INL) | 1 LSB |
| Polarity | Bipolar, Unipolar |
| Output Ranges | 0 V to +5 V, 0 V to +10 V (Single Supply), ±5 V (Dual Supply) |
Key Features
- Complete dual 12-bit DAC with output amplifiers and Zener voltage reference on a single chip.
- Microprocessor compatible with high-speed data latches and interface logic.
- Double buffered interface structure with an 8-bit wide data bus for the AD7237A.
- Parallel data input for the AD7247A with separate Chip Select inputs for each DAC.
- Asynchronous LDAC signal for updating DAC latches and analog outputs.
- REF OUT/REF IN function allowing use of either on-chip 5 V reference or an external reference.
- Faster settling times and improved reference variations.
- No external user trims required for full specified performance.
Applications
- Industrial control systems requiring precise analog output control.
- Automotive systems where reliable and fast DAC performance is crucial.
- Medical devices that need accurate voltage output for various measurements and controls.
- Aerospace and defense applications where high reliability and precision are essential.
- Any system requiring simultaneous updating of multiple DACs.
Q & A
- What is the resolution of the AD7237AARZ?
The AD7237AARZ has a resolution of 12 bits.
- What are the available output ranges for the AD7237AARZ?
The output ranges are 0 V to +5 V, 0 V to +10 V (single supply), and ±5 V (dual supply).
- What is the settling time of the AD7237AARZ?
The settling time is 8μs.
- Is the AD7237AARZ microprocessor compatible?
Yes, it is microprocessor compatible with high-speed data latches and interface logic.
- Can the AD7237AARZ use an external reference voltage?
Yes, it has a REF OUT/REF IN function that allows the use of either the on-chip 5 V reference or an external reference.
- What is the package type of the AD7237AARZ?
The package type is 24-SOIC (0.295, 7.50mm Width).
- What are the supply voltage ranges for the AD7237AARZ?
The supply voltage ranges are ±10.8V to ±16.5V (dual supply) and 10.8V to 15V (single supply).
- Does the AD7237AARZ require external user trims for full performance?
No, it does not require external user trims to achieve full specified performance.
- How does the LDAC signal function in the AD7237AARZ?
The LDAC signal is asynchronous and updates the DAC latches and analog outputs on its rising edge.
- What are some typical applications of the AD7237AARZ?
Typical applications include industrial control systems, automotive systems, medical devices, and aerospace and defense applications.
