This datasheet introduces the features and characteristics of the DS2781 battery monitoring chip, including voltage, temperature, current measurement, and battery remaining capacity estimation.
The DS2781 fuel‑gauge IC measures voltage, temperature and current for single‑ or dual‑cell lithium‑ion batteries and provides capacity estimates in mAh and percent. It stores cell‑stack characteristics and application parameters in on‑chip EEPROM and offers a unique 64‑bit ID for traceability.
The device operates from 2.5 V to 10 V, supports active and sleep power modes, and communicates via a Dallas 1‑Wire bus with standard (16 kbps) and over‑drive (140 kbps) speeds. It is available in TSSOP‑8 and TDFN‑10 packages and includes 24‑byte parameter EEPROM plus 16‑byte user EEPROM.
| Supply voltage range (any pin) | -0.3 V to +12 V |
|---|---|
| Operating temperature range | -40 °C to +85 °C |
| Voltage resolution | 9.76 mV per LSB |
| Temperature resolution | 0.125 °C per LSB |
| User EEPROM size | 16 bytes |
| Parameter EEPROM size | 24 bytes |
The DS2781 can operate with any pin voltage from –0.3 V up to +12 V.
The integrated temperature sensor provides a resolution of 0.125 °C per LSB.
The device includes 16 bytes of user‑accessible EEPROM.
The DS2781 is offered in a tiny TSSOP‑8 package and a 3 mm × 4 mm TDFN‑10 package.