High-Precision Coulomb Counter

  • RS Stock No. 190-4466
  • Mfr. Part No. DS2740U+
  • Manufacturer Maxim
Product overview and Technical data sheets
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): US
Product Details

15-Bit Bidirectional Current Measurement (DS2740U)
1.56μV LSB and ±51.2mV Dynamic Range
78μA LSB and ±2.56A Dynamic Range with External 20mΩ Sense Resistor (RSNS)
156μA LSB and ±5.12A Dynamic Range with External 10mΩ Sense Resistor (RSNS)
13-Bit Bidirectional Current Measurement (DS2740BU)
6.25μV LSB and ±51.2mV Dynamic Range
312μA LSB and ±2.56A Dynamic Range with External 20mΩ Sense Resistor (RSNS)
625μA LSB and ±5.12A Dynamic Range with External 10mΩ Sense Resistor (RSNS)
Analog Input Filter (IS1, IS2) Extends Dynamic Range for Pulse-Load Applications
Current Accumulation Register Resolution
6.25μVhr (Both DS2740U and DS2740BU)
0.3125mAhr with External 20mΩ RSNS
0.6250mAhr with External 10mΩ RSNS
Dallas 1-Wire Interface
Unique 64-Bit Device Address
Standard and Overdrive Timings (OVD)
Low Power Consumption:
Active Current: 65μA max
Sleep Current: 1μA max
Applications
Cell Phones
Digital Still Cameras
Portable Entertainment Devices
Smart Battery Packs/Chargers

Specifications
Attribute Value
Battery Type Lithium-Ion, NiMH
Mounting Type Surface Mount
Package Type μMax
Length 3.1mm
Pin Count 8
Typical Operating Supply Voltage 2.7 → 5.5 V
Dimensions 3.1 x 3.1 x 0.95mm
Width 3.1mm
Height 0.95mm
Maximum Operating Temperature +85 °C
Minimum Operating Temperature -40 °C
1000 In stock for delivery within 3 working days
Price Each (In a Tube of 50)
HK$ 20.806
(exc. GST)
units
Per unit
Per Tube*
50 - 200
HK$20.806
HK$1,040.30
250 +
HK$20.437
HK$1,021.85
*price indicative