The DS1847 is an End-of-Life (EOL) addressable master/slave I²C digital potentiometer designed by Dallas Semiconductor. This device integrates a digital potentiometer, a temperature sensor, and EEPROM memory into a single chip, offering a versatile solution for various applications requiring precise resistance control and temperature monitoring. The DS1847 is typically used in applications where remote control or automatic adjustment of resistance is needed, along with temperature sensing capabilities.

Applications

• Automatic temperature compensation circuits
• Remote resistance adjustment
• Volume control in audio equipment
• LCD bias control
• Power supply calibration

Features

• Digital Potentiometer: Provides adjustable resistance with digital control, allowing for precise settings.
• I²C Interface: Offers a two-wire serial interface for easy communication with microcontrollers and other digital devices.
• Temperature Sensor: Integrated temperature sensor monitors the device's temperature and can be used for temperature compensation.
• EEPROM Memory: On-chip EEPROM allows for storing potentiometer settings and temperature calibration data.
• Addressable: Supports multiple devices on the same I²C bus with individual addressing.
• Wide Operating Voltage: Operates over a wide voltage range, making it suitable for various power supply configurations.

Benefits

• Precise Resistance Control: Digital control ensures accurate and repeatable resistance settings.
• Remote Adjustment: I²C interface enables remote control and automation of resistance adjustment.
• Temperature Compensation: Integrated temperature sensor allows for automatic compensation of temperature-related variations.
• Non-Volatile Memory: EEPROM ensures that settings are retained even when power is removed.
• Reduced Component Count: Integration of potentiometer, temperature sensor, and EEPROM reduces the number of components required in a system.
• Simplified Design: The I²C interface simplifies communication and control, making it easier to integrate into existing systems.

Additional Details

The DS1847 communicates via the I²C protocol, allowing for simple and efficient communication with microcontrollers. The integrated EEPROM can store multiple settings, which can be recalled as needed. The temperature sensor provides an accurate measurement of the device's internal temperature. While this part is listed as EOL, it can still be valuable for legacy systems or for designs where a compact, integrated solution is required.