LTC1657IN#PBF

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The LTC1657IN#PBF is a Digital to Analog Converter (DAC) with integrated analog and digital I/O, a fast update rate and buffered Current Output. This device was designed to provide the optimal performance to simplify data acquisition and to serve as a major link in the signal chain. It converts digital pulses (8-bit parallel or 3-wire SPI) into 2 complementary Current Outputs, each with an adjustable range of 26uA to 98mA.

The way the LTC1657IN#PBF works is fairly simple. When it receives a digital signal from an external device, it first processes the data by converting this digital input into two 9-bit binary codes. These codes are then sent to a pair of multiplying DACs (MDACs) - one for each output - where they are converted into analog signals. These outputs are then amplified and delivered to the corresponding output pins. With its high speed of 2MSPS, this process allows the device to output up to 500 current ranges.

The LTC1657IN#PBF has a lot of advantages, the most important one being its low power dissipation in the form of fast settling time, I2C or SPI control bus and high output current accuracy up to 0.04%. For example, it is ideal for applications such as data acquisition systems, laser beam control, targeted tracking, elevation control, panel-metering, current source/sink, filtering and process control.

Its integrated thermal protection and programmable gain amplifier also make the LTC1657IN#PBF well-suited for use in surveillance systems, measuring applications, motor control, automotive and industrial applications. The wide supply range from 4.75V to 5.25V makes it ideal for battery-powered applications, and the single output makes the device well-suited for applications requiring more than one analog output.

In addition to its highly accurate performance, the LTC1657IN#PBF also has a number of other features, such as a software reset that resets/shuts down the output in a fraction of a second, and a power-on reset that helps protect against SPI/I2C failures. The device also offers an open-collector active-low interrupt output, which provides an indication when the DAC has completed its last update.

Finally, the LTC1657IN#PBF\'s temperature indication is optimised for applications that require temperature sensing. The internal temperature sensor is designed to hold up to three data points that are stored in the EEPROM, reducing the need for external sensors. The data stored in the EEPROM are available via the SPI interface.

In conclusion, the LTC1657IN#PBF is an ideal choice for a variety of data acquisition applications, due to its low power consumption and accuracy. Its fast settling time and wide supply range make it a good fit for battery powered applications, while its programmable gain amplifier and open-collector active-low interrupt output provide robust protection against signal failure. Its integrated temperature indication also ensures accurate temperature sensing. All these features make the LTC1657IN#PBF a great choice for applications involving data acquisition.

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