DS1847

NOT RECOMMENDED FOR NEW DESIGNS

Dual Temperature-Controlled NV Variable Resistor

Data Sheet (Rev. 2) Product Selection Table
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Overview

  • Two linear taper, temperature-controlled variable resistors
  • DS1847-050
    • One 50kΩ, 256 position
    • One 10kΩ, 256 position
  • DS1847-010
    • 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.
DS1847
Dual Temperature-Controlled NV Variable Resistor
DS1847: Pin Assignment
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 5

Technical Articles 13

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Parts Product Life Cycle Description
Matched Resistors & Transistors 1
DS1848
NOT RECOMMENDED FOR NEW DESIGNS Dual Temperature-Controlled NV Variable Resistor & Memory
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