LTC2755AIUP-16#PBF

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Data Acquisition – Digital to Analog Converters (DACs) typically use a digital signal processing (DSP) block to convert digital values into analog outputs. The LTC2755AIUP-16#PBF is an example of a differential current output DAC that combines a DSP block with a differential current output stage to produce accurate, 4-quadrant multiplying (or programmable) current outputs, without the need for any external components. In this article, we will discuss the application field and working principle of the LTC2755AIUP-16#PBF.

Application Field

The LTC2755AIUP-16#PBF is designed for applications that need precise, low distortion performance in a small package, with a wide operating temperature range (–40°C to +125°C). It is ideal for demanding applications such as communication systems, automotive, industrial control and instrumentation. It is available in a 24-lead TSSOP package, which simplifies board layout while providing superior EMI/RFI immunity and excellent thermal characteristics.

The device is rated for 3V to 5V power supply operation and it features coarse, fine and 4X digital-to-analog conversion (DAC) resolution; additionally, temperature coefficient and current ranges are factory-programmable.

The LTC2755AIUP-16#PBF is designed for space-limited systems and performs exceptionally well in a wide range of applications, providing a maximum output current of ±16mA and a settling time of 500µs, making it ideal for low power, fast settling applications.

Working Principle

The LTC2755AIUP-16#PBF is an advanced differential current output DAC, which combines a digital signal processing (DSP) block and a current output amplifier in a single package. The DSP block encodes a 9-bit input to a 15-bit register. Its high speed and excellent linearity makes it ideal for demanding digital-to-analog conversions. The precision output amplifier is designed for low power, low distortion performance and requires only a single digital input.

The DAC features a programmable output current range from ±1mA to ±16mA and a temperature coefficient accuracy of 0.02% per °C. It is capable of generation 4-quadrant current outputs without the use of any external components. The output current values can be set over a wide operating temperature range from –40°C to +125°C using an external voltage source.

The power supply range is 3V to 5V, and the power consumption is low enough to work with low voltage supplies. The device also has an effective zero current state, which eliminates the need for external disabling components. In addition, it includes programmable output current ranges, settling times, and temperature coefficients.

Conclusion

The LTC2755AIUP-16#PBF is an excellent example of a high-performance differential current output DAC. With its wide operating temperature range, small package size, and low power consumption, this device is ideal for low power and fast settling applications. Combined with its programmable features and external voltage source programming, the LTC2755AIUP-16#PBF provides exceptional performance in terms of accuracy, linearity, and distortion.

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