DS2740

www.maxim-ic.com FEATURES ƒ 15-Bit Bidirectional Current Measurement (DS2740U) ƒ 1.56μV LSB and ±51.2mV Dynamic Range ƒ 78μA LSB and ±2.56A Dynamic Range with External 20mΩ Sense Resistor (RSNS) ƒ 156μA LSB and ±5.12A Dynamic Range with External 10mΩ Sense Resistor (RSNS) ƒ 13-Bit Bidirectional Current Measurement (DS2740BU) ƒ 6.25μV LSB and ±51.2mV Dynamic Range ƒ 312μA LSB and ±2.56A Dynamic Range with External 20mΩ Sense Resistor (RSNS) ƒ 625μA LSB and ±5.12A Dynamic Range with External 10mΩ Sense Resistor (RSNS) ƒ Analog Input Filter (IS1, IS2) Extends Dynamic Range for Pulse-Load Applications ƒ Current Accumulation Register Resolution ƒ 6.25μVhr (Both DS2740U and DS2740BU) ƒ 0.3125mAhr with External 20mΩ RSNS ƒ 0.6250mAhr with External 10mΩ RSNS ƒ Dallas 1-Wire® Interface ƒ Unique 64-Bit Device Address ƒ Standard and Overdrive Timings (OVD) ƒ Low Power Consumption: ƒ Active Current: 65μA max ƒ Sleep Current: 1μA max DS2740 High-Precision Coulomb Counter PIN CONFIGURATION OVD 1 8 VDD PIO SNS IS2 2 3 4 7 DQ 6 VSS 5 IS1 μMAX (DS2740U, DS2740BU) See Table 1 for Ordering Information. See Table 2 for Detailed Pin Descriptions. PIN DESCRIPTION OVD- 1-Wire Bus Speed Select PIO - Programmable I/O Pin SNS - Sense Resistor Input IS2 - Current-Sense Input IS1 - Current-Sense Input VSS - Device Ground, Current-Sense Resistor Return DQ - Data Input/Output VDD - Power-Supply Input (2.7V to 5.5V) 1-Wire is a registered trademark of Dallas Semiconductor. 1 of 16 051805 Tabl...