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
The DS1847 Dual Temperature-Controlled Nonvolatile (NV) Variable Resistor consists of two 256- position linear, variable resistors. The DS1847-050 consists of one 10kΩ and one 50kΩ, while the DS1847-010 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
DS1847 Reliability Data1/12/2023
Variable Resistor and Temperature-Indexed Lookup Table (LUT) Compensate for Regulator Output7/16/2010
Using an Analog Voltage to Control a Digital Potentiometer5/15/2008
Side-by-Side Comparison of Fiber-Monitoring and Control ICs12/4/2006
DS1847/DS1848 Online Interactive Temperature Calculator7/9/2003
How to Interpret DS1847/DS1848 Temperature Readings9/9/2002
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
Interfacing Digitally Controlled Pots and Resistors to Laser Drivers12/3/2002
Behind the Light Show in Optical Transceivers10/21/2002
2-Wire Communication Using LabVIEW9/9/2002
Using a PC's RS-232 Serial Port To Communicate with 2-Wire Devices6/7/2002
HFAN-02.3.2: Maintaining Average Power and Extinction Ratio, Part 2, MAX3863 Laser Driver and DS1847 Digital Resistor6/5/2002
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
DS1847 Companion Parts
Recommended Related Parts
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