DS1869S-010/T&R

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Digital potentiometers are becoming increasingly popular because they provide a precise and cost-efficient way to adjust and measure resistance in a wide range of applications. The DS1869S-010/T&R is a 10-ohm, high accuracy Digitally Controlled Variable Resistor (DVR) with an integrated, two-terminal interface for SPI, I2C and 12C communications. It is part of a family of low-power, low-cost digital potentiometers from Maxim Integrated that provide flexibility, accuracy, and low-voltage operation.

The main application field for the DS1869S-010/T&R are portable, battery-powered applications such as mobile phones and medical equipment. These applications require precise resistance control, with low power consumption, high accuracy, and reliability.

The DS1869S-010/T&R works by controlling the current between two terminals of its integrated resistor network, which results in a change of resistance between the terminals. The resistance is adjusted by sending an 8-bit binary digital word over an 8-bit serial interface. There is a one-time programmable register (OTPR) where up to four resistance settings can be stored, allowing the user to set up different resistance levels for different operating conditions.

Maxim Integrated provides the DS1869S-010/T&R with several protection features to ensure its long life and reliability in battery operated applications. The parts are made of solid-foil resistive-elements with a liquid polymer that is coated onto one of the layers, preventing moisture penetration and corrosion. The DS1869S-010/T&R also incorporates a thermal limit of 30mW to prevent overheating.

As a digital potentiometer, the DS1869S-010/T&R can be used to achieve precise control over resistance for automatic gain control, audio crossover networks, and power supply and voltage regulators. It is also useful for applications such as current sensing and battery fuel gauge, amongst other applications. It can be used to precisely control the resistance of a voltage divider or it can function as a circuit breaker or safety interlock. With its small size and high accuracy, the DS1869S-010/T&R is a very versatile solution for controlling and measuring resistance.

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