DS1867E-010+T&R

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Digital potentiometers are commonly used in precision electronic control systems, such as in data acquisition or embedded systems. The DS1867E-010+T&R is a digitally-programmable, 10-bit, nonvolatile bipotentiometer that provides a highly reliable, low-power digital potentiometer solution. This device operates at temperatures up to 105°C, has a dielectric strength greater than 300 Vac, and is ideal for use in high-temperature and hostile environments.

The DS1867E-010+T&R comprises two linear-taper digital potentiometers, providing an infinite number of settings within a total resistance range of 10kΩ to 220kΩ. Each wiper offers selectable resolution of 4 to 10 bits, and its absolute accuracy is ±1%. It offers integrated overvoltage and temperature protection, as well as ESD and latch-up protection in order to further improve its overall reliability. Available in 8-pin SOIC, 8-pin PDIP, and 6-pin SOT-23 packages, it can easily be mounted into any printed-circuit board (PCB) system.

The DS1867E-010+T&R provides two control inputs. Its serial up/down (SU/SD) input is used to incrementally adjust the resistance with 0.1% resolution, while its nonvolatile write protect (WP) input is used to protect the current setting from inadvertent overwriting.

In terms of applications, the DS1867E-010+T&R is primarily used in feedback loops to control the gain of transimpedance amplifiers, transconductance amplifiers, and transresistance amplifiers. It is also used to provide adjustable gain in sensor-based systems, such as active air/fuel ratio controllers, wide bandwidth active filters, and multiband audio equalizers. It is capable of providing superior performance over traditional wirewound and film potentiometers, and its flexible design allows for easy integration into systems for improved performance and customer satisfaction.

The working principle behind the DS1867E-010+T&R is significantly different than that of traditional wirewound and film potentiometers. This device contains a high-precision array of metal-on-metal resistor elements that can be incrementally programmed through an external control interface. The control inputs are then used to adjust the resistance in steps of 0.1%, providing continuous fine-tuning of the resistance range. The WP input is then used to permanently write the selected resistance setting into nonvolatile memory, which prevents the accidental overwriting of the original setting.

In conclusion, the DS1867E-010+T&R provides a reliable, low-power digital potentiometer solution that is widely used in precision electronic control systems. Its control inputs allow for the adjustable resistance range to be incrementally programmed with high precision, while the WP input is used to protect against accidental overwriting. As such, this device is ideal for applications such as feedback loops for transimpedance amplifiers and adjustable gain systems for sensor-based systems.

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