LM3822 National Semiconductor, LM3822 Datasheet - Page 2
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LM3822
Manufacturer Part Number
LM3822
Description
Precision Current Gauge IC with Internal Zero Ohm Sense Element and PWM Output
Manufacturer
National Semiconductor
Datasheet
1.LM3822.pdf
(12 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM3822MM-1.0
Manufacturer:
NS
Quantity:
1 334
Company:
Part Number:
LM3822MM-2.0
Manufacturer:
NSC
Quantity:
400
www.national.com
Ordering Information
*
during next interval.
Pin Description (High-Side, LM3822)
LM3822MM-1.0
LM3822MMX-1.0
LM3822MM-2.0
LM3822MMX-2.0
Pin
Current is sampled over a fixed interval. The average current during this interval is indicated by the duty cycle of the PWM output
1
2
3
4
5
6
7
8
Order No.
SENSE+, V
GND
FLTR+
FLTR−
SD
TEST
PWM
SENSE−
*
Name
DD
Range
Sense
±
±
±
±
1.0A
1.0A
2.0A
2.0A
Sampling
Interval
50 ms
50 ms
50 ms
50 ms
High side of internal current sense, also supply voltage.
Supply Ground.
Filter input — provides anti-aliasing for delta sigma modulator.
Filter input.
Shutdown input. Connected to V
When low, the LM3822 is put into a low current mode.
Connect to GND for normal operation.
Digital output indicates the current magnitude and direction.
Low side of internal current sense.
*
High-side
High-side
High-side
High-side
Sensing
Method
2
Package
MUA08A
MUA08A
MUA08A
MUA08A
Number
NS
DD
through a pull-up resistor for normal operation.
Package
MSOP-8
MSOP-8
MSOP-8
MSOP-8
Function
Type
Tape and Reel
(1000 units/reel)
Tape and Reel
(3500 units/reel)
Tape and Reel
(1000 units/reel)
Tape and Reel
(3500 units/reel)
Supplied As: