LTC2637HMS-HZ12#PBF

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Data Acquisition - Digital to Analog Converters (DAC) play a large role in system engineering. The LTC2637HMS-HZ12#PBF is one of the most commonly used ICs for this type of application. This article will explain the application fields and the working principle of the device.

Application Fields

The LTC2637HMS-HZ12#PBF is a 12-bit, voltage output DAC with an external reference, designed to provide a convenient and powerful way of setting and controlling the output of various systems. It is mainly used in the following application fields:

• Data conversion in robotic and vision systems
• Precision sensing in medical systems
• Power control and monitoring
• Communication systems

In addition, the LTC2637HMS-HZ12#PBF is also often used in industrial process control, embedded systems, battery-powered products and consumer applications.

Working Principle

At the heart of the LTC2637HMS-HZ12#PBF is a low power, high accuracy, dual-mode DAC core. It is designed to operate in a twelve bit, 10-bit, 8-bit or 6-bit resolution, depending on the mode selected. The core adapts itself to the power supply voltage range and can withstand up to ±18V. It can achieve an output resolution of 0.039 mV/bit @5V power supply.

The DAC can be configured to provide either a unipolar or a bipolar output. In unipolar mode, the output voltage range is from 0V to (REF+1 LSB) voltage, while in bipolar mode the output voltage range is from -REF to +REF. The DAC supports two types of I2C or SPI modes, with a simple three or four-wire interface. The output can be disabled with the shutdown pin.

The device includes four different write command modes which can be used for long term calibration. These commands are write data, load data, add data and subtract data, allowing users to set the output to any desirable value without the need of higher order digital filters. The add and subtract data commands allow users to quickly adjust the output voltage without the need to read the current output and then add or subtract the new value.

The LTC2637HMS-HZ12#PBF is designed to achieve fast settling time, up to 500 ns, and low noise and distortion values. Furthermore, the device is powered by a low current supply, up to 75 μA and it can function in temperatures ranging from -40°C to +85°C.

Conclusion

The LTC2637HMS-HZ12#PBF is ideal for precision control systems due to its fast settling time, low noise and high accuracy. It is widely used in various application fields related to data conversion, sensing, power control and communication systems. With an external reference and a wide range of output voltage, the device can be conveniently adjusted to various settings. With its easy to use interface and four different write command modes, the DAC can be used for long-term calibration of the output.

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