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LM3814 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM3814
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)

LM3814 Datasheet(HTML) 3 Page - National Semiconductor (TI)

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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Absolute Maximum Supply Voltage
5.5V
Power Dissipation
(Note 2)
ESD Susceptibility (Note 3)
1.5 kV
Sense Current (peak, for 200 msec) (Note 4)
10A
Sink Current for PWM pin
1 mA
Voltage on Pin 5
5.25V
Maximum Junction Temperature
150˚C
Storage Temperature
−65˚C to +150˚C
Lead Temperature (Soldering, 10 sec)
260˚C
Operating Ratings (Note 1)
Input Voltage
2.0V to 5.25V
Sense Current (continuous) (Note 4)
7A
Junction Temperature Range
−40˚C to +125˚C
Electrical Characteristics
LM3814-1.0, LM3815-1.0
V
DD = 5.0V for the following specifications. Supply bypass capacitor is 1µF and filter capacitor is 0.1µF.
Symbol
Parameter
Conditions
Typ
(Note 5)
Limit
(Note 6)
Units
I
ACC
Average Current Accuracy
(Note 7)
at 0.9A current
0.9
A
0.868 / 0.850
A (min)
0.932 / 0.950
A (max)
e
n
Effective Output Noise (rms)
12
mA
LM3814-7.0, LM3815-7.0
V
DD = 5.0V for the following specifications. Supply bypass capacitor is 1µF and filter capacitor is 0.1µF.
Symbol
Parameter
Conditions
Typ
(Note 5)
Limit
(Note 6)
Units
I
ACC
Average Current Accuracy
(Note 7)
at 2.5A current (Note 8)
2.5
A
2.350 / 2.288
A (min)
2.650 / 2.712
A (max)
e
n
Effective Output Noise (rms)
120
mA
Common Device Parameters
Unless otherwise specified, V
DD = 5.0V for the following specifications. Supply bypass capacitor is 1µF and filter capacitor is
0.1µF.
Symbol
Parameter
Conditions
Typ
(Note 5)
Limit
(Note 6)
Units
I
Q1
Quiescent Current
Normal Mode, SD = high
100
µA
160
µA (max)
I
Q2
Quiescent Current
Shutdown Mode, SD = low
2.5
µA
10
µA (max)
D
RES
PWM Resolution
0.8
%
t
S
Sampling Time
6
ms
4
ms (min)
10
ms (max)
f
P
Frequency of PWM Waveform
160
Hz
100
Hz (min)
250
Hz (max)
V
TH
Threshold High Level for SD
1.2
V
1.8
V (min)
V
TL
Threshold Low Level for SD
1.3
V
0.7
V (max)
V
OH
Logic High Level for PWM
Load current = 1mA, 2V
≤ V
DD
5.25V
V
DD − 0.05
V
DD − 0.2
V
V (min)
www.national.com
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