(China (Mainland))
Product Summary
The LM3822MMX-2.0 is a Precision Current Gauge IC with Internal Zero Ohm Sense Element and PWM Output, which provides easy to use precision current measurement with virtually zero insertion loss (typically 0.003Ω). The LM3822MMX-2.0 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. The shutdown pin can be used to inhibit false triggering during start-up, or to enter a low quiescent current mode. The LM3822MMX-2.0 is factory-set in two different current options. The sense range is -1.0A to +1.0A or -2.0A to +2.0A. The sampling interval for this part is 50ms.
Parametrics
LM3822MMX-2.0 absolute maximum ratings: (1)Absolute Maximum Supply Voltage: 5.5V; (2)Power Dissipation ESD Susceptibility: 1.5 kV; (3)Sense Current (peak, for 200 msec): 10A; (4)Sink Current for PWM pin: 1mA; (5)Maximum Junction Temperature: 150℃; (6)Storage Temperature: -65℃ to +150℃; (7)Lead Temperature (Soldering, 10 sec): 260℃.
Features
LM3822MMX-2.0 features: (1)No external sense element required; (2)PWM output indicates the current magnitude and direction; (3)PWM output is easily interfaced with microprocessors and controllers; (4)Precision ΔΣ current-sense technique; (5)Low temperature sensitivity; (6)Internal filtering rejects false trips; (7)Internal Power-On-Reset (POR); (8)DC Offset is less than 1 mA for 1A part.
Diagrams
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IC CURRENT GAUGE PRECISION 8MSOP |
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