LM3812 Datasheet Precision Current Gauge-ic

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: LM3812/LM3813 Precision Current Gauge IC with Ultra Low Loss Sense Element and PWM Output June 1999 LM3812/LM3813 Precision Current Gauge IC with Ultra Low Loss Sense Element and PWM.

This datasheet includes multiple variants, all published together in a single manufacturer document.

Datasheet Details

Part number	LM3812
Manufacturer	National Semiconductor (now Texas Instruments)
File Size	258.19 KB
Description	Precision Current Gauge-IC
Datasheet	LM3812 LM3 Datasheet (PDF)

General Description

The LM3812/LM3813 Current Gauges provide easy to use precision current measurement with virtually zero insertion loss (typically 0.004Ω).

The LM3812 is used for high-side sensing and the LM3813 is used for low-side sensing.

A Delta Sigma analog to digital converter is incorporated to precisely measure the current and to provide a current averaging function.

Key Features

n No external sense element required n PWM output indicates the current magnitude and direction n PWM output can be interfaced with microprocessors n Precision ∆Σ current-sense technique n Low temperature sensitivity n Internal filtering rejects false trips n Internal Power-On-Reset (POR).

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