DS2760 Dallas Semiconducotr, DS2760 Datasheet - Page 25

• Manufacturer Part Number: DS2760
• Description: High Precision Li-Ion Battery Monitor
• Manufacturer: Dallas Semiconducotr

ELECTRICAL CHARACTERISTICS:
1-WIRE INTERFACE
NOTES
1. All voltages are referenced to VSS.
2. See “Ordering Information” section of datasheet to determine corresponding part number for each
3. Internal current sense resistor configuration.
4. External current sense resistor configuration.
5. Self heating due to output pin loading and sense resistor power dissipation can alter the reading from
6. Voltage offset measurement is with respect to V
7. Although the Current Register is large enough to report values higher than 1.8A, internal
8. Requires in-system calibration by user.
9. This spec excludes the effects of temperature on the sense resistor. The DS2760 compensates for the
10. Typical value for t
11. 4 year data retention at 70 C.
12. Typical load capacitance on DC and CC is 100 pF.
PARAMETER
Time Slot
Recovery Time
Write 0 Low Time
Write 1 Low Time
Read Data Valid
Reset Time High
Reset Time Low
Presence Detect High
Presence Detect Low
SWAP timing pulse width
SWAP timing pulse
falling edge to DC release
SWAP timing pulse rising
edge to DC engage
DQ Capacitance
V
ambient conditions.
compensation for sense resistor process variation and temperature effects can reduce the maximum
reportable current to as low as 1.8A.
internal sense resistor’s temperature coefficient of 4000 ppm/ C to an accuracy of 500 ppm/ C. The
DS2760 does not attempt to compensate for the characteristics of an external sense resistor. Error
terms arising from the use of an external sense resistor should be taken into account when calculating
total current measurement error.
OV
value.
ERR
is at 3.6V and 25 C.
SYMBOL
t
t
t
t
t
t
t
SWOFF
t
t
t
SWON
C
t
LOW0
LOW1
t
RSTH
SLOT
RSTL
RDV
SWL
REC
PDH
PDL
DQ
MIN
480
480
0.2
60
60
15
60
1
1
0
0
25 of 25
OV
at 25°C.
TYP
(-20 C to 70 C; 2.5V
MAX
480
120
120
960
240
15
15
60
25
1
1
UNITS
pF
s
s
s
s
s
s
s
s
s
s
s
s
VDD
NOTES
12
12
5.5V)
DS2760