DS2746 Datasheet | Manix

DESCRIPTION The DS2746 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 DS2746 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 DS2746 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 space. FEATURES - 14-Bit Bidirectional Current Measurement - 6.25μV LSB, ±51.2m V Dynamic Range - 416.7μA LSB, ±3.4A Range (RSNS = 15mΩ) Current Accumulation Register Resolution - 6.25μVhr LSB, 409.6m Vh Range - 417μAhr LSB, 27.31Ah Range 11-Bit Battery Voltage Measurement - 2.44m V LSB, 0V to 4.997V Input Range - ±10m V 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 - - - - .. ORDERING INFORMATION PART DS2746G+ DS2746G+T&R TEMP RANGE -40ºC to +85ºC -40ºC to +85ºC PIN-PACKAGE 10-Pin 3mm×3mm TDFN DS2746G+ in Tapeand-Reel APPLICATIONS 2.5G/3G Wireless Handsets PDA/Smartphones Digital Still and Video Cameras Handheld puters and Terminals + Denotes lead-free package. PIN CONFIGURATION TYPICAL OPERATING CIRCUIT TOP VIEW 3mm × 3mm TDFN Note: Some revisions of this device may incorporate deviations from published specifications known as errata....