Features and Benefits
- Two linear taper, temperature-controlled variable resistors
- One 50kΩ, 256 position
- One 10kΩ, 256 position
- Two 10kΩ, 256 position
- Resistor settings changeable every 2°C
- 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°C to +95°C
- Programming temperature: 0°C to +70°C
- 128 bytes of user EEPROM
The DS1848 Dual Temperature-Controlled Nonvolatile (NV) Variable Resistor consists of two 256- position linear, variable resistors. The DS1848-050 consists of one 10kΩand 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°C increment over the -40°C to +95°C 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.
Product Lifecycle Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Documentation & Resources
DS1848 Reliability Data1/12/2023
Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface3/8/2011
Using the DS1859 with External EEPROM \r\n3/23/2005
How to Use a PC's Parallel Port to Communicate with 2-Wire Devices6/15/2004
Base-Station RF Power-Amplifier Biasing4/27/2004
Regenerating the DS1847/DS1848 Resistor Calibration Constants3/10/2003
Introduction of the DS1847 for Industrial Controls3/6/2003
Behind the Light Show in Optical Transceivers10/21/2002
Interfacing digitally controlled potentiometers and resistors to laser drivers5/10/2002
DS1847/DS1848 Temperature Coefficient Supplement2/28/2002
Considerations for the DS1847/DS1848 Look-Up Tables1/8/2002
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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