MAXIM DS1848B-050/TR

The DS1848 Dual Temperature-Controlled Nonvolatile (NV) Variable Resistor consists of two 256- position linear, variable resistors. The DS1848-050 consists of one 10kΩ and one 50kΩ while the DS1848-010 consists of two 10kΩ resistors; both incorporate a direct-to-digital temperature sensor. The device provides an ideal method for setting and temperature-compensating bias voltages and currents in control applications using a minimum of circuitry. The variable resistors settings are stored in EEPROM memory and can be accessed over the industry standard 2-wire serial bus. The value of each variable resistor is determined by a temperature-addressed look-up table, which can assign a unique value to each resistor for every 2℃ increment over the -40℃ to +95℃ range. The output of the digital temperature sensor is also available as a 13-bit, 2’s complement value over the serial bus. The interface I/O pins consist of SDA and SCL.

• Two linear taper, temperature-controlled variable resistors
• DS1848-050: One 50k, 256 position; One 10k, 256 position
• DS1848-010: Two 10k, 256 position
• Resistor settings changeable every 2℃
• Access to temperature data and device control via a 2-wire interface
• Operates from 3V or 5V supplies
• Packaging: 14-pin TSSOP, 16-ball CSBGA
• Operating temperature: -40℃ to +95℃
• Programming temperature: 0℃ to +70℃
• 128 bytes of user EEPROM