Overview
The AD7537JR-REEL, produced by Analog Devices Inc., is a dual 12-bit Digital-to-Analog Converter (DAC) integrated into a single monolithic chip. This device is designed to provide high precision and versatility, making it suitable for a variety of applications. The AD7537 features two identical 12-bit multiplying DACs, each with a separate reference input, which enhances thermal tracking and reduces board space requirements. The device is manufactured using the Linear Compatible CMOS (LC²MOS) process, ensuring compatibility with most microprocessors and accepting TTL, 74HC, and 5V CMOS logic level inputs.
Key Specifications
| Specification | Value |
|---|---|
| Resolution | 12 bits |
| Number of DACs | 2 |
| Power Supply | +12 V to +15 V, ±10% tolerance |
| Logic Compatibility | TTL, 74HC, 5V CMOS |
| Package Types | 24-Lead PDIP, 28-Lead PLCC, 24-Lead SOIC (Wide) |
| DAC to DAC Matching | Typical matching: 0.5% |
| Analog Ground | Separate AGND lines for each DAC |
| Control Signals | A0, A1, CS, WR, UPD, CLR |
| Data Format | Right-justified, 2-byte (8 LSBs, 4 MSBs) |
Key Features
- Dual 12-Bit DACs: Two identical 12-bit multiplying DACs on a single chip, ensuring precise matching and thermal tracking.
- Separate Reference Inputs: Each DAC has a separate reference input, enhancing versatility.
- Double Buffering: Allows simultaneous update of both DACs.
- Asynchronous CLR Line: Useful for calibration routines, clears all registers when taken low.
- Compact Packaging: Available in 24-pin DIP, 28-terminal PLCC, and 24-lead SOIC packages.
- Wide Power Supply Tolerance: Operates on +12 V to +15 V with ±10% tolerance.
Applications
The AD7537 is suitable for various applications requiring high precision and dual DAC functionality, such as:
- Industrial Control Systems: Where precise analog output is necessary for control and monitoring.
- Medical Devices: For applications requiring accurate and reliable analog signals.
- Aerospace and Defense: Where high reliability and precision are critical.
- Test and Measurement Equipment: To generate precise analog signals for testing and calibration purposes.
Q & A
- What is the resolution of the AD7537 DACs?
The AD7537 features two 12-bit DACs. - How many DACs are integrated into the AD7537?
The AD7537 contains two identical 12-bit DACs. - What are the power supply requirements for the AD7537?
The device operates on +12 V to +15 V with ±10% tolerance. - What logic levels does the AD7537 support?
The AD7537 accepts TTL, 74HC, and 5V CMOS logic level inputs. - What are the available package types for the AD7537?
The AD7537 is available in 24-Lead PDIP, 28-Lead PLCC, and 24-Lead SOIC (Wide) packages. - How does the double buffering feature work in the AD7537?
The double buffering allows simultaneous update of both DACs, enhancing the device's versatility. - What is the purpose of the asynchronous CLR line in the AD7537?
The asynchronous CLR line is used to clear all registers, which is particularly useful in calibration routines. - How does the separate AGND line for each DAC enhance the device's functionality?
The separate AGND lines allow one DAC to be operated with AGND biased while the other is connected in the standard configuration, increasing the device's versatility. - What is the typical DAC to DAC matching for the AD7537?
The typical matching between the two DACs is 0.5%. - What is the data format supported by the AD7537?
The AD7537 supports a right-justified, 2-byte (8 LSBs, 4 MSBs) data format.
