Datasheet4U Logo Datasheet4U.com

LM3822 - Precision Current Gauge-IC

This page provides the datasheet information for the LM3822, a member of the LM3 Precision Current Gauge-IC family.

Datasheet Summary

Description

The LM3822 Current Gauge provides easy to use precision current measurement with virtually zero insertion loss (typically 0.003Ω).

The LM3822 is used for high-side sensing.

Features

  • n No external sense element required n PWM output indicates the current magnitude and direction n PWM output is easily interfaced with microprocessors and controllers n Precision ∆Σ current-sense technique n Low temperature sensitivity n Internal filtering rejects false trips n Internal Power-On-Reset (POR) n DC Offset is less than 1 mA for 1A part.

📥 Download Datasheet

Datasheet preview – LM3822

Datasheet Details

Part number LM3822
Manufacturer National Semiconductor
File Size 265.20 KB
Description Precision Current Gauge-IC
Datasheet download datasheet LM3822 Datasheet
Additional preview pages of the LM3822 datasheet.

📁 Similar Datasheet

  • LM380 - 2.5W Audio Power Amplifier (Texas Instruments)
  • LM380 - 2.5W Audio Power Amplifier (Texas Instruments)
  • LM384 - 5W Audio Power Amplifier (Texas Instruments)
  • LM3842 - step-down constant current LED driver (ETC)
  • LM3842A - CURRENT MODE PWM CONTROLLER (HTC)
  • LM3843A - CURRENT MODE PWM CONTROLLER (HTC)
  • LM3844A - CURRENT MODE PWM CONTROLLER (HTC)
  • LM3845A - CURRENT MODE PWM CONTROLLER (HTC)
  • LM385 - Adjustable Micropower Voltage Reference (Analog Integrations Corporation)
  • LM385 - 1.2 & 2.5V MICROPOWER VOLTAGE REFERENCE (LINFINITY)
Other Datasheets by National Semiconductor
  • LM382 - Low Noise Dual Preamplifier
  • LM3820 - AM RADIO SYSTEM
  • LM3824 - Precision Current Gauge-IC
  • LM380 - Audio Power Amplifier
  • LM381 - LM381/LM381A Low Noise Dual Preamplifier
  • LM3812 - Precision Current Gauge-IC
  • LM3813 - Precision Current Gauge-IC
  • LM3814 - Fast Current Gauge-IC

Full PDF Text Transcription

Click to expand full text
LM3822 Precision Current Gauge IC with Internal Zero Ohm Sense Element and PWM Output July 2000 LM3822 Precision Current Gauge IC with Internal Zero Ohm Sense Element and PWM Output General Description The LM3822 Current Gauge provides easy to use precision current measurement with virtually zero insertion loss (typically 0.003Ω). The LM3822 is used for high-side sensing. A Delta Sigma analog to digital converter is incorporated to precisely measure the current and to provide a current averaging function. Current is averaged over 50 msec time periods in order to provide immunity to current spikes. The ICs have a pulse-width modulated (PWM) output which indicates the current magnitude and direction.
Published: |