LTC2637IDE-LMX8#TRPBF

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The LTC2637IDE-LMX8#TRPBF is a family of integrated digital-to-analog converters (IDACs) with 10-bit and 12-bit resolution. The converters are available in output voltage ranges of 0–10V, 0–5V, 0–2.5V, ±5V, 0–4.096V, ±2.048V, 0–1V, 0–0.5V, ±10V and ±1V. The device family is designed for applications requiring precision, low-noise, fast settling and low power operation.

LTC2637IDE-LMX8#TRPBF devices combine a hardware SPI and I2C interface along with an I2C/SPI address select pin, allowing each device to be uniquely identified with these popular digital serial interfaces. It also can make code reuse easier across the whole product range. Communication to the IDAC is accomplished through a fast serial interface. The LTC2637 uses a 4-wire SPI/I²C-compatible serial interface, allowing communication with a variety of microcontrollers.

IDACs are typically used for setting analog voltage for different purposes, for example, controlling the color and brightness of LED backlit LCDs. The LTC2637IDE-LMX8#TRPBF is ideal for any space or power-sensitive application requiring a true analog current or voltage output. Additionally, it is also used in industrial and commercial systems such as ATE and process control systems. Due to its low power consumption, the LTC2637IDE-LMX8#TRPBF is also suitable for battery-powered applications. The device is available in a 10-pin 3 mm x 3 mm DFN package.

The working principle of LTC2637IDE-LMX8#TRPBF is based on charge transfer technology. It consists of two circuit elements, a sample and hold circuit and a DAC. The sample and hold circuit samples and stores the voltage on the digital input, and it is updated after each conversion by the data received from the digital interface. The DAC then converts the stored voltage into an analog output. The sample and hold circuit is also used for buffering digital inputs that vary in rate more than specified by the data rate.

Analog outputs are generated using a combination of a precision voltage reference and a string of resistors or capacitors. The string of resistors or capacitors forms a digitally programmable voltage divider, so that depending on the digital input, different fractions of the reference voltage are outputted. This allows the analog voltage to be controlled by varying the digital input value.

The LTC2637IDE-LMX8#TRPBF makes use of integrated 10-bit or 12-bit resolution to achieve higher linearity and better noise performance compared to traditional 8-bit DACs. The converter has extremely low power consumption and is capable of producing true analog outputs of 0-10V, 0-5V, 0-2.5V, ±5V, 0-4.096V, ±2.048V, 0-1V, 0-0.5V, ±10V and ±1V, which are generated by a combination of a precision voltage reference and a string of resistors or capacitors. The device also features an integrated digital to analog interface, allowing communication with a variety of microcontrollers. With these features, the LTC2637IDE-LMX8#TRPBF is ideal for a wide range of applications, such as ATE, industrial and commercial systems, and battery-powered applications.

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