Datasheet > LTC2942CDCBTRMPBF

LTC2942CDCBTRMPBF

更新时间： 2022-12-26 05:39:05

品牌	Logo	应用领域
凌特 - Linear		电池仪表
页数	文件大小	规格书
16页	174K
描述
Battery Gas Gauge with Temperature, Voltage Measurement

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LTC2942

Battery Gas Gauge

with Temperature,

Voltage Measurement

FEATURES

DESCRIPTION

The LTC^®2942 measures battery charge state, battery

voltage and chip temperature in handheld PC and portable

productapplications.Itsoperatingrangeisperfectlysuited

for single cell Li-Ion batteries. A precision coulomb coun-

ter integrates current through a sense resistor between

the battery’s positive terminal and the load or charger.

Battery voltage and on-chip temperature are measured

with an internal 14-bit No Latency ΔΣ™ ADC. The three

measured quantities (charge, voltage and temperature)

are stored in internal registers accessible via the onboard

Indicates Accumulated Battery Charge and

Discharge

High Accuracy Analog Integration

ADC Measures Battery Voltage and Temperature

Integrated Temperature Sensor

High Side Sense

1% Voltage and Charge Accuracy

±±5mꢀ Sense ꢀoltage Range

SMBus/I C Interface

Conﬁgurable Alert Output/Charge Complete Input

2.7ꢀ to ±.±ꢀ Operating Range

SMBus/I C interface.

Quiescent Current Less than 155μA

TheLTC2942featuresprogrammablehighandlowthresh-

olds for all three measured quantities. If a programmed

threshold is exceeded, the device communicates an alert

using either the SMBus alert protocol or by setting a ﬂag

in the internal status register.

Small 6-Pin 2mm × 3mm DFN package

APPLICATIONS

Low Power Handheld Products

The LTC2942 requires only a single low value sense resis-

tor to set the measured current range.

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. No Latency ΔΣ is a trademark of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

Cellular Phones

MP3 Players

Cameras

GPS

TYPICAL APPLICATION

Total Charge Error vs

Differential Sense Voltage

2.5

ꢀ

+ = 3.6ꢀ

SENSE

1.±

1.5

CHARGER

LOAD

5.1μF

SENSE

LTC2942

AL/CC

5.±

SENSE

155mΩ

I C/SMBus

–

SDA

SCL

SENSE

TO HOST

–5.±

–1.5

–1.±

–2.5

1-CELL

Li-Ion

GND

2942 TA51a

5.1

155

ꢀ

(mꢀ)

SENSE

2942 TA51b

2942f

12 3 4 5 6 7...16

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