Ordering information, Pin description (high-side, lm3822) – Rainbow Electronics LM3822 User 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
www.national.com
2