LTC2941CDCB-TRPBF View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC2941CDCB-TRPBF' PDF : 16 Pages View PDF
LTC2941
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
Digital Inputs and Digital Outputs
VITH
Logic Input Threshold, AL/CC, SCL,
SDA
VOL
Low Level Output Voltage, AL/CC, SDA
IIN
Input Leakage, AL/CC, SCL, SDA
CIN
Input Capacitance, AL/CC, SCL, SDA
tPCC
Minimum Charge Complete (CC) Pulse
Width
I2C Timing Characteristics
I = 3mA
VIN = VSENSE+/2
(Note 7)
l 0.3 •
VSENSE+
l
l
l
0.7 •
V
VSENSE+
0.4
V
1
μA
10
pF
1
μs
fSCL(MAX)
tBUF(MIN)
tSU,STA(MIN)
tHD,STA(MIN)
Maximum SCL Clock Frequency
Bus Free Time Between Stop/Start
Minimum Repeated Start Setup Time
Minimum Hold Time (Repeated)
Start Condition
l 400
900
kHz
l
1.3
μs
l
600
ns
l
600
ns
tSU,STO(MIN) Minimum Setup Time for Stop
Condition
l
600
ns
tSU,DAT(MIN) Minimum Data Setup Time Input
tHD,DATI(MIN) Minimum Data Hold Time Input
l
100
ns
l
0
μs
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All currents into pins are positive, all voltages are referenced to
GND unless otherwise specified
Note 3: ISUPPLY = ISENSE+ + ISENSE–
Note 4: The equivalent charge of an LSB in the accumulated charge
registers (C,D) depends on the value of RSENSE and the setting of the
internal pre-scaling factor M. It is calculated by:
qLSB
= 0.085mAh • 50mΩ
RSENSE
•M
128
See Choosing RSENSE and Coulomb Counter Prescaler M section for more
information.
1mAh = 3.6A • s = 3.6C (Coulomb), 0.085mAh = 306mC.
Note 5: Deviation of qLSB from its nominal value.
Note 6: CB = capacitance of one bus line in pF (10pF ≤ CB ≤ 400pF).
Note 7: Guaranteed by design, not subject to test.
TIMING DIAGRAM
SDA
SCL
tHD, STA
tSU, DAT
tHD, DATO,
tHD, DATI
tof
tSU, STA
tHD, STA
tSU, STO
tBUF
2941 F01
START
CONDITION
REPEATED START
CONDITION
Figure 1. Definition of Timing on I2C Bus
STOP
CONDITION
START
CONDITION
2941f
3
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