Rainbow Electronics LM3822 - Manual (Page 2)

Ordering Information
Order No. *
Sense
Range
Sampling
Interval*
Sensing
Method
NS
Package
Number
Package
Type
Supplied As:
LM3822MM-1.0 ± 1.0A 50 ms High-side MUA08A MSOP-8 Tape and Reel
(1000 units/reel)
LM3822MMX-1.0 ± 1.0A 50 ms High-side MUA08A MSOP-8 Tape and Reel
(3500 units/reel)
LM3822MM-2.0 ± 2.0A 50 ms High-side MUA08A MSOP-8 Tape and Reel
(1000 units/reel)
LM3822MMX-2.0 ± 2.0A 50 ms High-side MUA08A MSOP-8 Tape and Reel
(3500 units/reel)
* Current is sampled over a fixed interval. The average current during this interval is indicated by the duty cycle of the PWM output during next interval.
Pin Description (High-Side, LM3822)
Pin Name Function
1 SENSE+, V
DD
High side of internal current sense, also supply voltage.
2 GND Supply Ground.
3 FLTR+ Filter input — provides anti-aliasing for delta sigma modulator.
4 FLTR− Filter input.
5 SD Shutdown input. Connected to V
DD
through a pull-up resistor for normal operation.
When low, the LM3822 is put into a low current mode.
6 TEST Connect to GND for normal operation.
7 PWM Digital output indicates the current magnitude and direction.
8 SENSE− Low side of internal current sense.
LM3822
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