OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

LTC1998CS6#TRPBF

P1-P3P4-P6P7-P9P10-P12
LTC1998
1
1998fb
BLOCK DIAGRAM
FEATURES
APPLICATIONS
DESCRIPTION
2.5µA, 1% Accurate
SOT-23 Comparator and Voltage
Reference for Battery Monitoring
The LTC
®
1998 is a micropower comparator and a precision
adjustable reference in a 6-pin SOT-23 package that is
optimized for lithium-ion low battery detection circuits.
The LTC1998 features a voltage detection circuit with an
adjustable threshold voltage and hysteresis. The threshold
voltage can be programmed from 2.5V to 3.25V with two
external resistors. A 10mV to 750mV hysteresis can be
added with a third external resistor.
A proprietary internal architecture maintains 1% thresh-
old voltage accuracy over temperature with low cost 1%
external resistors.
A separate power supply pin, V
LOGIC,
allows the battery-low
logic output to operate below the battery voltage, allowing
compatibility with low voltage microprocessors without a
pull-up resistor. Power supply glitches are eliminated by
preventing the cross-conducting current which occurs
when the output changes state.
The LTC1998 operates with battery or supply voltages
up to 5.5V and its battery-low output is valid for battery
voltages above 1.5V.
Threshold Voltage Error vs Temperature
n
High Accuracy Trip Voltage: 1% Max Error Using
External 1% Resistors
n
Adjustable Threshold Voltage and Hysteresis
n
Quiescent Current: 2.5μA Typ
n
Output Swings Rail-to-Rail
n
Thresholds Programmable from 2.5V to 3.25V
n
Output State Guaranteed for V
BATT
≥1.5V
n
Low Profi le (1mm) ThinSOT™ Package
n
Lithium-Ion Battery-Powered Equipment
PDAs
Cell Phones
Handheld Instruments
Battery Packs
Pagers
Palm Top Computers
POS Terminals
1998 BD
THRESHOLD
ADJUST
V
HYST.A
V
TH.A
BATT
V
LOGIC
BATTL
O
1.1R
R
1.2V
TEMPERATURE (°C)
–45 15 55
1998 TA02
–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
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
LTC1998
2
1998fb
PIN CONFIGURATION ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (BATT or V
LOGIC
to GND) ............6V
Voltage
V
TH.A
, V
H.A
....................... BATT + 0.3V to GND – 0.3V
BATTLO ..........................V
LOGIC
+ 0.3V to GND – 0.3V
Operating Temperature Range (Note 3).... –40°C to 85°C
Specifi ed Temperature Range (Note 4)
LTC1998C ............................................ –40°C to 85°C
LTC1998I.............................................. –40°C to 85°C
Storage Temperature Range ................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) .................. 300°C
(Note 1)
6 BATTL
O
5 V
LOGIC
4 V
H.A
BATT 1
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
GND 2
V
TH.A
3
T
JMAX
= 150°C, θ
JA
= 250°C/W
ORDER INFORMATION
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LTC1998CS6#PBF LTC1998CS6#TRPBF LTTY 6-Lead Plastic TSOT-23 –40°C to 85°C
LTC1998IS6#PBF LTC1998IS6#TRPBF LTTY 6-Lead Plastic TSOT-23 –40°C to 85°C
LEAD BASED FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE
LTC1998CS6 LTC1998CS6#TR LTTY 6-Lead Plastic TSOT-23 –40°C to 85°C
LTC1998IS6 LTC1998IS6#TR LTTY 6-Lead Plastic TSOT-23 –40°C to 85°C
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed by a label on the shipping container.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifi cations, go to:
http://www.linear.com/tapeandreel/
LTC1998
3
1998fb
ELECTRICAL CHARACTERISTICS
PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply
Supply Voltage Range-BATT
l
1.5 5.5 V
Supply Voltage Range-V
LOGIC
l
1V
BATT
V
Supply Current, V
BATT
= 3V,
V
TH.A
= 1.5V
T
A
= 25°C
LTC1998CS6
LTC1998IS6
l
l
2.5 3.5
4.2
4.5
μA
μA
μA
Supply Current, V
BATT
= 5.5V,
V
TH.A
= 1.5V
T
A
= 25°C
LTC1998CS6
LTC1998IS6
l
l
3 4.3
5.2
5.5
μA
μA
μA
Monitor
Threshold Accuracy V
BATT.Th
= 2.5V, Pin 3 Shorted to Ground
l
0.6
0.8
0.85
1
%
%
V
BATT.Th
= 3V, Pin 3 Driven by Precision Voltage Source to 1V
LTC1998C
LTC1998I
l
l
0.5
0.6
0.61
0.71
%
%
V
BATT.Th
= 3V, V
TH.A
= 1V (Note 5)
Programmed with 1% Max External Resistors
LTC1998C
LTC1998I
l
l
0.8
0.9
1
1.1
%
%
V
BATT.Th
= 3.25V, Pin 3 Driven by Precision Voltage Source to 1.5V
LTC1998C
LTC1998I
l
l
0.6
0.7
0.65
0.85
%
%
V
BATT.Th
= 3.25V, V
TH.A
= 1.5V (Note 5)
Programmed with 1% Max External Resistors
LTC1998C
LTC1998I
l
l
0.9
1
1.1
1.3
%
%
Hysteresis Accuracy V
HYST
≤ 250mV
250mV ≤ V
HYST
≤ 750mV
l
l
–5
±5
5mV
mV
Allowable Hysteresis Range (Note 2)
l
10 750 mV
Propagation Delay C
OUT
= 100pF
Overdrive = 10mV
Overdrive = 100mV
350
150
μs
μs
Threshold Adjust Pin Leakage, I
TH.A
V
TH.A
≤ 1.5V
l
0.01 1 nA
Hysteresis Adjust Pin Leakage, I
H.A
V
H.A
≤ 1.5V
l
0.01 1 nA
Output
BATTLO High Voltage I
OUT
= –1mA, V
LOGIC
≥ 1.5V
l
V
LOGIC
– 0.3 V
BATTLO Low Voltage I
OUT
= 1mA, V
BATT
≥ 2V
l
0.2 V
BATTLO Low Voltage I
OUT
= 0.25mA, V
BATT
= 1V
l
0.3 V
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
GND
= 0V, unless otherwise noted.
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: Maximum allowable hysteresis depends on desired trip voltages.
See application notes for details.
Note 3: LTC1998C and LTC1998I are guaranteed functional over the
operating temperature range of –40°C to 85°C.
Note 4: The LTC1998C is guaranteed to meet specifi ed performance from
0°C to 70°C. The LTC1998C is designed, characterized and expected to
meet specifi ed performance from –40°C to 85°C but is not tested or QA
sampled at these temperatures. The LTC1998I is guaranteed to meet
specifi ed performance from –40°C to 85°C.
Note 5: This parameter is not 100% tested.
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:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet