The DS2746G-C02+T remains in production, however, for new projects, we recommend ModelGauge m5 MAX17055 fuel gauge.
The DS2746G-C02+T provides system-side battery capacity monitoring in cost-sensitive applications. Voltage, bidirectional current, and accumulated current measurement data is provided to the host processor over a 2-wire interface. Offset bias and offset blanking features greatly enhance the accuracy of the coulomb counter. In addition, the DS2746G-C02+T has two auxiliary A/D inputs to sample the pack identification resistor, thermistor, or other voltage source. The results are reported as a ratiometric fraction of the supply voltage eliminating error related to the supply. The DS2746G-C02+T reduces the total power consumption of the measurement circuit by enabling the resistor dividers, through the VOUT pin, only while measurements are made. When the system is inactive, a low power sleep mode reduces current consumption while maintaining the coulomb count. The tiny 3mm × 3mm TDFN package consumes only 9mm2 of PCB spaceFeature
- 14-Bit Bidirectional Current Measurement
- 6.25μV LSB, ±51.2mV Dynamic Range
- 416.7μA LSB, ±3.4A Range (RSNS = 15mΩ)
- Current Accumulation Register Resolution
- 6.25μVhr LSB, 409.6mVh Range
- 417μAhr LSB, 27.31Ah Range
- 11-Bit Battery Voltage Measurement
- 2.44mV LSB, 0V to 4.997V Input Range
- ±10mV Accuracy at 3.6V Input
- Two 11-Bit Aux Input Voltage Measurements
- Ratiometric Inputs Eliminate Supply Error
- VOUT drives Dividers, Reduces Power
- ±8 LSB Accuracy
- Low Power Consumption:
- Active Current: 70μA typical, 100μA max
- Sleep Current: 1μA typical, 3μA max
Applications
- 2.5G/3G Wireless Handsets
- Digital Still and Video Cameras
- Handheld Computers and Terminals
- PDA/Smartphones
