2762A25 Ver la hoja de datos (PDF) - Maxim Integrated
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2762A25 Datasheet PDF : 25 Pages
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DS2762 High-Precision Li+ Battery Monitor With Alerts
ELECTRICAL CHARACTERISTICS: 1-WIRE INTERFACE
(2.5V £ VDD £ 5.5V, TA = -20°C to +70°C.)
PARAMETER
SYMBOL
CONDITIONS
Time Slot
tSLOT
Recovery Time
tREC
Write 0 Low Time
tLOW0
Write 1 Low Time
tLOW1
Read Data Valid
tRDV
Reset Time High
tRSTH
Reset Time Low
tRSTL
Presence Detect High
tPDH
Presence Detect Low
tPDL
SWAP Timing Pulse Width
SWAP Timing Pulse Falling Edge to DC
Release
SWAP Timing Pulse Rising Edge to DC
Engage
DQ Capacitance
tSWL
tSWOFF
(Note 13)
tSWON
CDQ
(Note 13)
MIN TYP MAX
60
120
1
60
120
1
15
15
480
480
960
15
60
60
240
0.2
120
0
1
0
1
60
UNITS
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
pF
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Note 8:
Note 9:
Note 10:
Note 11:
Note 12:
Note 13:
Note 14:
All voltages are referenced to VSS.
See the Selector Guide section to determine the corresponding part number for each VOV value.
Internal current-sense resistor configuration.
External current-sense resistor configuration.
Test conditions are PLS = 4.1V, VDD = 2.5V. Maximum current for conditions of PLS = 15V, VDD = 0V is 10mA.
Self-heating due to output pin loading and sense resistor power dissipation can alter the reading from ambient conditions.
Voltage offset measurement is with respect to VOV at +25°C.
The current register supports measurement magnitudes up to 2.56A using the internal sense resistor option and 64mV with the
external resistor option. Compensation of the internal sense resistor value for process and temperature variation can reduce the
maximum reportable magnitude to 1.9A.
Current offset error null to ±1LSB typically requires 3.5s in-system calibration by user.
Current gain error specification applies to gain error in converting the voltage difference at IS1 and IS2, and excludes any error
remaining after the DS2762 compensates for the internal sense resistor’s temperature coefficient of 3700ppm/°C to an accuracy
of ±500ppm/°C. The DS2762 does not compensate for external sense resistor characteristics, and any error terms arising from
the use of an external sense resistor should be taken into account when calculating total current measurement error.
Typical value for tERR1 is specified at 3.6V and +25°C, max value is specified for 0°C to +50°C. Max value for tERR2 is specified
for -20°C to +70°C.
Four-year data retention at +70°C.
Typical load capacitance on DC and CC is 1000pF.
Error at time of shipment from Dallas Semiconductor is 3% max. Board mounting processes may cause the current gain error
to widen to as much as 10% for devices with the internal sense resistor option. Contact factory for on-board recalibration
procedure for devices with the internal sense resistor option to improve accuracy.
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