Datasheet > LTC1998

LTC1998

更新时间： 2023-12-20 18:46:07

品牌	Logo	应用领域
亚德诺 - ADI		电池比较器
页数	文件大小	规格书
12页	135K
描述
用于电池监视的 2.5μA、1% 准确度、SOT-23 封装比较器和电压基准

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LTC1998 数据手册

LTC1998

2.5µA, 1% Accurate

SOT-23 Comparator and Voltage

Reference for Battery Monitoring

DESCRIPTION

FEATURES

TheLTC^®1998isamicropowercomparatorandaprecision

adjustable reference in a 6-pin SOT-23 package that is

optimized for lithium-ion low battery detection circuits.

High Accuracy Trip Voltage: 1% Max Error Using

External 1% Resistors

Adjustable Threshold Voltage and Hysteresis

Quiescent Current: 2.5μA Typ

The LTC1998 features a voltage detection circuit with an

adjustablethresholdvoltageandhysteresis.Thethreshold

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.

Output Swings Rail-to-Rail

Thresholds Programmable from 2.5V to 3.25V

Output State Guaranteed for V

≥1.5V

BATT

Low Proﬁle (1mm) ThinSOT™ Package

Aproprietaryinternalarchitecturemaintains1%thresh-

old voltage accuracy over temperature with low cost 1%

external resistors.

APPLICATIONS

Lithium-Ion Battery-Powered Equipment

PDAs

Cell Phones

Handheld Instruments

Battery Packs

Pagers

Palm Top Computers

POS Terminals

Aseparatepowersupplypin,V

allowsthebattery-low

LOGIC,

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.

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.

BLOCK DIAGRAM

Threshold Voltage Error vs Temperature

1.0

BATT

0.9

SET BY 1%

TH.A

LOGIC

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

EXTERNAL R,

THRESHOLD = 3V

1.1R

HYST.A

= 1V

THRESHOLD

ADJUST

TH.A

BATTLO

THRESHOLD = 3V

TH.A

SHORTED

TH.A

TO GROUND,

1.2V

THRESHOLD = 2.5V

1998 BD

TEMPERATURE (°C)

–45 –25

–5

1998 TA02

1998fb

12 3 4 5 6 7...12

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