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Home ›  LL38 > LM3814M-1.0-LM3814M-7.0-LM3815M-1.0-LM3815M-7.0-LM3815MX-7.0,Fast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output, for Low-Side Sensing
LM3814M-1.0-LM3814M-7.0-LM3815M-1.0-LM3815M-7.0-LM3815MX-7.0 Fast Delivery,Good Price
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Partno Mfg Dc Qty AvailableDescript
LM3814M-1.0 |LM3814M10NSN/a100avaiFast Current Gauge IC with Ultra-Low Loss Sense Element and PWM Output, for High-Side Sensing
LM3814M-7.0 |LM3814M70NSN/a1250avaiFast Current Gauge IC with Ultra-Low Loss Sense Element and PWM Output, for High-Side Sensing
LM3815M-1.0 |LM3815M10NSN/a300avaiFast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output, for Low-Side Sensing
LM3815M-7.0 |LM3815M70NSN/a310avaiFast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output, for Low-Side Sensing
LM3815MX-7.0 |LM3815MX70NSN/a7412avaiFast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output, for Low-Side Sensing


LM3815MX-7.0 ,Fast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output, for Low-Side SensingPin Description (Low-Side, LM3815)Pin Name Function1 SENSE+, GND High side of internal current sens ..
LM381AN ,LM381/LM381A Low Noise Dual PreamplifierPin Description (Low-Side, LM3815)Pin Name Function1 SENSE+, GND High side of internal current sens ..
LM381AN ,LM381/LM381A Low Noise Dual PreamplifierApplicationsn Battery charge/discharge gaugen Motion control diagnosticsn Power supply load monitor ..
LM381N ,LM381/LM381A Low Noise Dual PreamplifierfeaturesincludehighYbLarge output voltage swing (V 2V)p-pCCbgain (112 dB), large output voltage swi ..
LM3820N ,AM RADIO SYSTEMFeatures I Input protection diodes I Good control on sensitivity I Improved sm and tweet ..
LM3822MM-1.0 ,Precision Current Gauge IC with Internal Zero Ohm Sense Element and PWM OutputLM3822 Precision Current Gauge IC with Internal Zero Ohm Sense Element and PWM OutputNovember 2000L ..
LMV712LDX ,Low Power, Low Noise, High Output, RRIO Dual Operational Amplifier with Independent ShutdownLMV712 Low Power, Low Noise, High Output, RRIO Dual Operational Amplifier with IndependentShutdownF ..
LMV712MM ,Low Power, Low Noise, High Output, RRIO Dual Operational Amplifier with Independent ShutdownFeaturesThe LMV712 duals are high performance BiCMOS opera- (Typical Unless Otherwise Noted)tional ..
LMV712MMX ,Low Power, Low Noise, High Output, RRIO Dual Operational Amplifier with Independent Shutdownapplications requiringn 5 MHz GBPRail-to-Rail inputs combined with speed and low noise. Theyn Slew ..
LMV712TLX/NOPB ,Low Pwr, Low Noise, High Output, RRIO Dual Op Amp w/ Independent Shutdown 10-DSBGA -40 to 85Features 3 DescriptionThe LMV712-N devices are high-performance1• Available In Automotive AEC-Q100 ..
LMV715IDBVR ,Single Low-Power RRIO Operational Amplifiers With High Output Current Drive And Shutdown 6-SOT-23 -40 to 85
LMV7219M5 ,7 nsec, 2.7V to 5V Comparator with Rail-to- Rail OutputFeaturesThe LMV7219 is a low-power, high-speed comparator with (V =5V,T = 25˚C, Typical values unle ..


LM3814M-1.0-LM3814M-7.0-LM3815M-1.0-LM3815M-7.0-LM3815MX-7.0
Fast Current Gauge IC with Ultra-Low Loss Sense Element and PWM Output, for High-Side Sensing
LM3814/LM3815
Fast Current Gauge IC with Ultra Low Loss Sense
Element and PWM Output
General Description

The LM3814/LM3815 Current Gauges provide easyto use
precision current measurement with virtually zero insertion
loss (typically 0.004Ω). The LM3814is usedfor high-side
sensing andthe LM3815is usedfor low-side sensing. Delta Sigma analogto digital converteris incorporatedto
precisely measure the current andto providea current av-
eraging function. Currentis averaged over6 msec time
periodsin orderto provide immunityto current spikes. The
ICs havea pulse-width modulated (PWM) output which indi-
catesthe current magnitude and direction. The shutdownpin
canbe usedto inhibit false triggering during start-up,orto
entera low quiescent current mode.
The LM3814 and LM3815 are factory-setin two different
current options. The sense rangeis −1Ato +1Aor −7Ato
+7A. The user specifiesa particular part numberto match
the current rangefora given application. The sampling
intervalfor these partsis 6ms.If larger sampling intervalis
desiredfor better accuracy, please referto the data sheets
forthe part numbers LM3812 and LM3813.
Key Specifications
Ultra low insertion loss (typically 0.004Ω) 2Vto 5.25V supply range ±3.5% accuracyat room temperature (includes
accuracyofthe internal sense element) (LM3814-1.0,
LM3815-1.0) Low quiescent currentin shutdown mode (typically 2.5
µA)6 msec sampling interval
Features
No external sense element required PWM output indicatesthe current magnitude and
direction PWM output canbe interfaced with microprocessors PrecisionΔΣ current-sense technique Low temperature sensitivity Internal filtering rejects false trips Internal Power-On-Reset (POR)
Applications
Battery charge/discharge gauge Motion control diagnostics Power supply load monitoring and management Resettable smart fuse
Connection Diagrams

Top View
LM3814
for High-Side Sensing
Top View
LM3815
for Low-Side Sensing
February 2005
LM3814/LM3815
Fast
Current
Gauge
with
Ultra
Low
Loss
Sense
Element
and
PWM
Output
ic,good price


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