The DS1847 is a temperature-controlled nonvolatile (NV) variable resistor produced by Texas Instruments. It consists of two 256-position linear variable resistors. The device can access temperature data and device control via a 2-wire serial bus, and it operates from 3V or 5V supplies. The operating temperature range is -40°C to +95°C, and the packaging types are 14-pin TSSOP and 16-ball CSBGA.
The DS1847 is a dual temperature‑controlled non‑volatile variable resistor that provides two 256‑position linear resistors (10 kΩ or 50 kΩ) with an integrated digital temperature sensor. Settings are stored in on‑chip EEPROM and accessed via a standard 2‑wire serial bus, allowing temperature‑compensated bias voltages and currents with minimal external circuitry.
Key features include operation from 3.0 V to 5.5 V, programmable temperature‑addressed lookup tables, low‑power standby mode, and support for both standard (100 kHz) and fast (400 kHz) I²C‑compatible bus speeds. Detailed electrical characteristics, pin assignments, and programming procedures are provided for system integration.
| Operating temperature | -40 °C to +95 °C |
|---|---|
| Supply voltage (VCC) | 3.0 V to 5.5 V |
| Resistor options | 10 kΩ or 50 kΩ, 256 positions |
| EEPROM size per table | 72 × 8 bits |
| Temperature sensor output | 13‑bit 2’s complement |
| EEPROM write time | 5‑20 ms |
The device operates from 3.0 V to 5.5 V.
Each resistor provides 256 programmable positions.
Temperature data is read as a 13‑bit 2’s complement value over the 2‑wire serial bus.