Manual
DS2741
Current Monitor and Accumulator with
Integrated Sense Resistor
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
RECOMMENDED OPERATING CONDITIONS
(T
A
= -20°C to +70°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Voltage Range on V
CC
Relative to GND ...............-0.5V to +6.0V
Voltage Range on SDA, SCL,
RS+, RS-, SLP Relative to GND.....-0.5V to (V
CC
+ 0.5V), not to
exceed +6.0V
Continuous Internal Sense Resistor Current ......................±2.7A
Pulsed Internal Sense Resistor
Current ..................................±10A for <100µs/s, <1000 pulses
Operating Temperature Range ...........................-20°C to +70°C
Storage Temperature Range .............................-55°C to +125°C
Soldering Temperature...........................Refer to the IPC/JEDEC
J-STD-020 Specification.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
CC
(Note 1) 2.5 4.5 V
Input Logic-High: SCL, SDA V
IH
1.5 V
Input Logic-Low: SCL, SDA V
IL
0.4 V
Input Logic-High: SLP V
IH
0.7 x
V
CC
V
Input Logic-Low: SLP V
IL
0.3 x
V
CC
V
Power-Up Ramp Time from
0V to V
CCMIN
t
RAMP
25 ms
DC ELECTRICAL CHARACTERISTICS
(2.5V ≤ V
CC
≤ 4.5V, T
A
= -20°C to +70°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Active Current I
ACTIVE
SLP = SCL = SDA = V
CC
60 90 μA
Sleep-Mode Current I
SLEEP
SLP = 0V 1 2 μA
Output Logic-Low: SDA V
OL
I
OL
= 4mA (Note 1) 0.4 V
Internal Current-Sense Resistor
Value
R
SNS
+25°C 38 45 m
Current Resolution I
LSB
2.64 mA
Current Full-Scale Magnitude I
FS
(Note 2) 2.54 2.7 A
Current-Sense Accuracy at +25°C A
TL
I
SENSE
at 1.5A ±1 ±2 %
Current-Sense Accuracy from
0°C to +70°C
A
TL
I
SENSE
at 1.5A ±2 ±4 %
Current Sampling Rate t
CSR
(Note 3) 200 μs
Accumulator Resolution q
CA
0.247 mAh
t
ERR1
(Note 4) ±1 ±3
Internal Time-Base Accuracy
t
ERR2
(Note 4) ±6.5
%
Current-Sense Offset Measured with RS+ and RS- shorted -10 +10 mA