Rainbow Electronics DS2740 - Manual

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FEATURES
§ 15-Bit Bidirectional Current Measurement
(DS2740)
§ 1.56mV LSB and ±51.2mV Dynamic
Range
§ 78mA LSB and ±2.56A Dynamic
Range with External 20m W Sense
Resistor (R
SNS
)
§ 156mA LSB and ±5.12A Dynamic
Range with External 10m W Sense
Resistor (R
SNS
)
§ 13-Bit Bidirectional Current Measurement
(DS2740B)
§ 6.25mV LSB and ±51.2mV Dynamic
Range
§ 312mA LSB and ±2.56A Dynamic
Range with External 20m W Sense
Resistor (R
SNS
)
§ 625mA LSB and ±5.12A Dynamic
Range with External 10m W Sense
Resistor (R
SNS
)
§ Analog Input Filter (IS1, IS2) Extends
Dynamic Range for Pulse-Load
Applications
§ Current Accumulation Register
Resolution
§ 6.25mVhr (Both DS2740 and
DS2740B)
§ 0.3125mAhr with External 20mW
R
SNS
§ 0.6250mAhr with External 10mW
R
SNS
§ Dallas 1-Wire ® Interface
§ Unique 64-Bit Device Address
§ Standard and Overdrive Timings
(OVD)
§ Low Power Consumption:
§ Active Current: 65mA max
§ Sleep Current: 1mA max
PIN CONFIGURATION
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
V
SS
- Device Ground, Current-Sense Resistor
Return
DQ - Data Input/Output
V
DD
- Power-Supply Input (2.7V to 5.5V)
DS2740
High-Precision Coulomb Counter
www.maxim-ic.com
mMAX
(DS2740U, DS2740BU)
PIO
V
DD
DQ
V
SS
IS1 IS2
SNS
OVD
6
8
7
5
3
1
2
4
See Table 1 for Ordering Information.
See Table 2 for Detailed Pin Descriptions.
1-Wire is a registered trademark of Dallas Semiconductor.