LM3822, LM3 Datasheet - National Semiconductor

LM3822 Precision Current Gauge-IC

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 f.

LM3822 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-Res

LM3-822.pdf