LTC2632HTS8-LZ12#TRMPBF

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Data Acquisition – Digital to Analog Converters (DAC) – LTC2632HTS8-LZ12#TRMPBF

Digital-to-Analog Converters, or DACs, are electronic components which convert digital inputs to analog outputs. The LTC2632HTS8-LZ12#TRMPBF is one example from the Linear Technology Corporation, and is a low-voltage, Quad 12-bit Digital to Analog Converter (DAC) with high-performance integrated nonvolatile memory (NVM).

In general, DACs are used as a reference source for control circuits, as a voltage source, or as an analog output when there is need for a higher resolution than can be attained with a digital-to-analog interface. The LTC2632HTS8-LZ12#TRMPBF can be used to achieve these objectives while also providing improved temperature coefficient, linearity, low-voltage operation, and flexibility due to its nonvolatile memory and voltage reference options.

Device Build

The LTC2632HTS8-LZ12#TRMPBF is fabricated using an advanced CMOS design process and is offered in a 16-lead TSSOP package, which features an implemented thermal pad on the underside to improve heat dissipation. It has an operating temperature range from –40°C to +125°C.

The device contains four channels; each channel has its own selectable voltage reference and its own nonvolatile memory for storing parameters, such as gain settings and calibration coefficients. The available references are 2.5V, 3.0V, 4.096V, 5.12V, 10.0V, 10.24V and 20.48V. Additionally, there is an on-chip 5.0V voltage regulator voltage to help ensure the accuracy of the output signal.

The functional operation and common features of this device include internal power-on reset circuitry, a configurable limit setting feature, and industry-standard I²C bus compatible serial port interface. The device also offers shutdown control of each channel, enabling users to adjust the power consumption in inactive channels to a low value.

Features and Benefits

The LTC2632HTS8-LZ12#TRMPBF combines a low-voltage 12-bit digital-to-analog converter and an integrated nonvolatile memory making it ideal for use in many applications. It provides an industry-leading temperature coefficient of 7ppm/ ̊C, excellent linearity of 12-bit differential nonlinearity of 21ppm and monotonic performance, low-voltage operation from 2.5V to 5.0V, and versatile output range, from 0V to 1V, 0V to 10V, 0V to 5V, 1V to 10V, 1V to 5V, and 5V to 10V, depending on the power supply.

The integrated nonvolatile memory also makes it possible to store and recall Operating Parameters, such as gain settings, calibration coefficients, and limit settings. The nonvolatile memory also can be used to prevent a digital user interface from having to be continually reset and calibrated.

The fact that the device requires only digital inputs and a single power supply, as well as having low-voltage operation and low power consumption, make it suitable for portable or battery-powered instrumentation, digital signal processors (DSPs), and controllers with stringent size and power requirements.

Conclusion

The LTC2632HTS8-LZ12#TRMPBF low-voltage, Quad 12-bit Digital-to-Analog Converter from Linear Technology is a great choice for applications requiring both improved linearity, accuracy, and temperature coefficient, as well as the flexibility of an integrated Nonvolatile Memory. With its compact size (TSSOP-16), low power consumption, and wide range of available outputs, this device can be used to quickly and easily generate analog signals with minimal effort.

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