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LM3814M-1.0 Datasheet(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM3814M-1.0
Description  Fast Current Gauge IC with Ultra Low Loss Sense Element and PWM Output
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3814M-1.0 Datasheet(HTML) 2 Page - National Semiconductor (TI)

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Ordering Information
Order No.
#
Sense
Range
Sampling
Interval*
Sensing
Method
NS
Package
Number
Package
Type
Supplied As:
LM3814M-1.0
±1A
6 ms
High-side
M08A
SO-8
95 units in Rails
LM3814MX-1.0
±1A
6 ms
High-side
M08A
SO-8
2.5k units on Tape and Reel
LM3814M-7.0
±7A
6 ms
High-side
M08A
SO-8
95 units in Rails
LM3814MX-7.0
±7A
6 ms
High-side
M08A
SO-8
2.5k units on Tape and Reel
LM3815M-1.0
±1A
6 ms
Low-side
M08A
SO-8
95 units in Rails
LM3815MX-1.0
±1A
6 ms
Low-side
M08A
SO-8
2.5k units on Tape and Reel
LM3815M-7.0
±7A
6 ms
Low-side
M08A
SO-8
95 units in Rails
LM3815MX-7.0
±7A
6 ms
Low-side
M08A
SO-8
2.5k units on Tape and Reel
# Suffix M indicates that the part is available in Surface Mount package. Suffix X indicates that the part is available in 2.5k units
on Tape and 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.
The Package code M08A is internal to National Semiconductor and indicates an 8-lead surface mount package, SO-8.
Pin Description (High-Side, LM3814)
Pin
Name
Function
1
SENSE+, V
DD
High side of internal current sense, also supply voltage.
2
SENSE−
Low side of internal current sense.
3
FLTR+
Filter input — provides anti-aliasing for delta sigma modulator.
4
FLTR−
Filter input.
5SD
Shutdown pin. Connected to V
DD through a pull up resistor for normal operation.
When low, the IC goes into a low current mode (typically 3 µA).
6
PWM
PWM output indicates the current magnitude and direction.
7
GND
Ground
8
GND
Ground
Pin Description (Low-Side, LM3815)
Pin
Name
Function
1
SENSE+, GND
High side of internal current sense, also ground.
2
SENSE−
Low side of internal current sense.
3
FLTR+
Filter input – provides anti-aliasing for delta sigma modulator.
4
FLTR−
Filter input.
5SD
Shutdown pin. Connected to V
DD through a pull up resistor for normal operation.
When low, the IC goes into a low current mode (typically 3 µA).
6
PWM
PWM output indicates the current magnitude and direction.
7
GND
Ground
8V
DD
V
DD (supply)
www.national.com
2


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