Datasheet

LTC1760
6
1760fa
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Thermistor
Thermistor Trip
COLD-RANGE to OVER-RANGE
C
LOAD(MAX)
= 300pF (Note 9)
R1A = R2A = 1130Ω ±1%
R1B = R2B = 54900Ω ±1%
l
95 100 105 kΩ
Thermistor Trip
IDEAL-RANGE to COLD-RANGE
C
LOAD(MAX)
= 300pF (Note 9)
R1A = R2A = 1130Ω ±1%
R1B = R2B = 54900Ω ±1%
l
28.5 30 32.5 kΩ
Thermistor Trip
HOT-RANGE to IDEAL-RANGE
C
LOAD(MAX)
= 300pF (Note 9)
R1A = R2A = 1130Ω ±1%
R1B = R2B = 54900Ω ±1%
C-Grade (Note 6)
I-Grade (Note 6)
l
l
2.85
2.83
3
3
3.15
3.15
kΩ
kΩ
Thermistor Trip
UNDER-RANGE to HOT-RANGE
C
LOAD(MAX)
= 300pF (Note 9)
R1A = R2A = 1130Ω ±1%
R1B = R2B = 54900Ω ±1%
l
425 500 575 Ω
Logic Levels
SCL/SCL1/SCL2/SDA/SDA1/
SDA2 Input Low Voltage (V
IL
)
l
0.8 v
SCL/SCL1/SCL2/SDA/SDA1/
SDA2 Input High Voltage (V
IH
)
l
2.1 v
SCL/SCL1/SCL2/SDA/SDA1/
SDA2 Input Leakage Current
V
SDA
, V
SCL
, V
SDA1
, V
SCL1
,
V
SDA2
, V
SCL2
= 0.8V
l
–5 5 μA
SCL/SCL1/SCL2/SDA/SDA1/
SDA2 Input Leakage Current
V
SDA
, V
SCL
, V
SDA1
, V
SCL1
, V
SDA2
,
V
SCL2
= 2.1V
l
–5 5 μA
I
PULLUP
SCL1/SDA1/SCL2/SDA2 Pull-Up
Current When Not Connected to
SMBus Host
V
SCL1
, V
SDA1
, V
SCL2
, V
SDA2
= 0.4V
V
VCC2
= 4.85V and 5.55V (Current is Through
Internal Series Resistor and Schottky to V
CC2
)
165 220 350 μA
SCL1/SDA1/SCL2/SDA2
Series Impedance to Host SMBus
V
SDA1
, V
SCL1
, V
SDA2
, V
SCL2
= 0.8V
l
300 Ω
SCL/SDA Output Low Voltage (V
OL
).
LTC1760 Driving the Pin
I
PULLUP
= 350μA
l
0.4 V
SCL1/SDA1/SCL2/SDA2 Pullup
Output Low Voltage (V
OL
).
LTC1760 Driving the Pin with Battery
SMBus not Connected to Host SMBus
I
PULLUP
Internal to LTC1760
l
0.4 V
SCL1/SDA1/SCL2/SDA2
Output Low Voltage (V
OL
).
LTC1760 Driving the Pin with Battery
SMBus Connected to Host SMBus
I
PULLUP
= 350μA on Host Side
l
0.4 V
SCL/SCL1/SCL2/SDA/SDA1/ SDA2/
SMBALERT Power Down Leakage
V
VCC2
= 0V, V
VDDS
= 0V,
V
SCL
, V
SCL1
, V
SCL2
, V
SDA
,
V
SDA1
, V
SDA2
, V
SMBALERT
= 5.5V
l
2μA
SMBALERT Output Low Voltage (V
OL
)I
PULLUP
= 500μA
l
0.4 V
SMBALERT Output Pull-Up Current V
SMBALERT
= 0.4V 3.5 10 17.5 μA
V
IL_VDDS
V
IH_VDDS
V
DDS
Input Low Voltage (V
IL
)
V
DDS
Input High Voltage (V
IH
)
V
DDS
Operating Voltage
V
DDS
Operating Current
V
SCL
, V
SDA
= V
VDDS
, V
VDDS
= 5V
l
l
l
2.6
3
1.5
5.5
18
V
V
V
μA
V
IL_MODE
MODE Input Low Voltage (V
IL
)V
VCC2
= 4.85V
l
V
VCC2
• 0.3 V
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
junction temperature range, otherwise specifi cations are at T
A
= 25°C (Note 6). V
DCIN
= 20V, V
BAT1
= 12V, V
BAT2
= 12V, V
VDDS
= 3.3V,
V
VCC2
= 5.2V unless otherwise noted.