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LTC1998CS6#TRPBF

P1-P3P4-P6P7-P9P10-P12
LTC1998
4
1998fb
TYPICAL PERFORMANCE CHARACTERISTICS
Quiescent Supply Current
vs Supply Voltage
Quiescent Supply Current
vs Temperature
Threshold Voltage
vs T hreshold Adjust Voltage
Available Hysteresis
vs Threshold Voltage
Threshold Voltage Error
vs Temperature Input Current vs Temperature
SUPPLY VOLTAGE (V)
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY CURRENT (μA)
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
1998 G01
T
A
= 25°C
V
LOGIC
= V
BATT
V
TH.A
= 0V
V
TH.A
= 1.5V
TEMPERATURE (°C)
–50 –30 –10 10 30 50 70 90
SUPPLY CURRENT (μA)
1998 G02
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
V
BATT
= V
LOGIC
= 3V
V
TH.A
= 1.5V
THRESHOLD ADJUST VOLTAGE (V)
0
THRESHOLD VOLTAGE (V)
3.5
3.0
2.5
1998 G03
0.5 1.0
1.5
LOW BATTERY THRESHOLD VOLTAGE (V)
2.5
AVAILABLE HYSTERESIS (mV)
750
500
250
0
1998 G04
2.75 3.0
3.25
TEMPERATURE (°C)
–45 15 55
1998 G05
–25 –5
35 75 95
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
% ERROR
V
TH.A
SET BY 1%
EXTERNAL R,
THRESHOLD = 3V
V
TH.A
=1V
THRESHOLD = 3V
V
TH.A
SHORTED
TO GROUND,
THRESHOLD = 2.5V
TEMPERATURE (°C)
35
0.1
INPUT CURRENT V
TH.A
, V
H.A
(pA)
1
100
1000
10000
55
75
85 125
1998 G06
10
45 65
95
105
115
V
IN
= 1.5V
V
IN
= 0.5V
V
IN
= 1V
LTC1998
5
1998fb
Output Low Voltage
vs Load Current
Output High Voltage
vs Load Current
Output Short-Circuit Current
vs Supply Voltage
OUTPUT SINK CURRENT (mA)
1
OUTPUT VOLTAGE (V)
1998 G07
234
5
0.6
0.4
0.2
0
T
A
= 25°C
V
LOGIC
= V
BATT
= 3V
T
A
= –40°C
T
A
= 85°C
T
A
= 25°C
OUTPUT SOURCE CURRENT (mA)
1
OUTPUT VOLTAGE RELATIVE TO V
BATT
(mV)
1998 G08
234
5
0
–50
–100
–150
–200
–250
T
A
= 25°C
V
LOGIC
= V
BATT
T
A
= 85°C
T
A
= –40°C
BATT = 3V
BATT = 5V
T
A
= 25°C
T
A
= –40°C
T
A
= 85°C
T
A
= 25°C
SUPPLY VOLTAGE (V)
1.0 1.5 2.5 3.5 4.5 5.5
CURRENT (mA)
120
100
80
60
40
20
0
2.0 3.0 4.0 5.0
1998 G09
6.0
SOURCE CURRENT,
BATTLO SHORTED TO GND
SINK CURRENT,
BATTLO SHORTED
TO V
LOGIC
T
A
= 25°C
V
BATT
= V
LOGIC
TYPICAL PERFORMANCE CHARACTERISTICS
LTC1998
6
1998fb
PIN FUNCTIONS
BATT (Pin 1): Battery Voltage to be monitored. Supply
current is also drawn from this pin. Board layout should
connect this pin to the battery(+) terminal, through a trace
that does not conduct load current.
GND (Pin 2): Ground should be connected to the battery
(–) terminal through a trace that does not conduct load
return current.
V
TH.A
(Pin 3): Threshold Adjust Pin. Adjusts the low battery
threshold voltage, V
BATT.Th
= 2.5V + (V
TH.A
/2). V
TH.A
can be
supplied by a voltage source or a resistor divider.
V
H.A
(Pin 4): Hysteresis Adjust. Hysteresis threshold
voltage V
TH2
= 2.5V + (V
H.A
/2). V
H.A
can be supplied by
a voltage source or resistor divider. V
H.A
must always be
programmed to a higher potential than V
TH.A
. Hysteresis
voltage, V
HYST
= V
TH2
– V
BATT.Th
.
V
LOGIC
(Pin 5): Positive Supply Voltage for Output Driver.
This voltage can be driven from an external logic supply
or tied to BATT.
BATTLO (Pin 6): Output of Comparator. Low for BATT
< V
BATT.Th
(low battery threshold voltage). Output state
guaranteed for V
BATT
≥ 1.5V.
P1-P3P4-P6P7-P9P10-P12

LTC1998CS6#TRPBF

Mfr. #:
Buy LTC1998CS6#TRPBF
Manufacturer:
Analog Devices Inc.
Description:
Analog Comparators Li-Ion Low Battery Voltage Detector
Lifecycle:
New from this manufacturer.
Delivery:
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