LM3814M-7.0/NOPB National Semiconductor, LM3814M-7.0/NOPB Datasheet - Page 12
LM3814M-7.0/NOPB
Manufacturer Part Number
LM3814M-7.0/NOPB
Description
IC CURRENT GAUGE 6% 8SOIC
Manufacturer
National Semiconductor
Type
Gas Gauger
Datasheet
1.LM3814M-7.0NOPB.pdf
(14 pages)
Specifications of LM3814M-7.0/NOPB
Function
Current Gauge
Sensing Method
High-Side
Accuracy
±6%
Voltage - Input
2 ~ 5.25 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Operating Supply Voltage (min)
2V
Operating Supply Voltage (max)
5.25V
Operating Temp Range
-40C to 125C
Package Type
SOIC N
Mounting
Surface Mount
Pin Count
8
Operating Temperature Classification
Automotive
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Current - Output
-
Lead Free Status / Rohs Status
Compliant
Other names
*LM3814M-7.0
*LM3814M-7.0/NOPB
LM3814M-7.0
*LM3814M-7.0/NOPB
LM3814M-7.0
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LM3814M-7.0/NOPB
Manufacturer:
MOT
Quantity:
1 001
www.national.com
Look-Up Tables
The following tables show how to convert the duty cycle of
the PWM output to a current value, and vice versa. The
*Maximum Sense Current = 1.0 Amps for LM3814-1.0 and LM3815-1.0
The sense current should be multiplied by 10 for LM3814-7.0 and LM3815-7.0.
Sense Current
(Amps)*
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.00
TABLE 1. CURRENT TO DUTY CYCLE CONVERSION TABLE
Duty Cycle
95.5
93.2
90.9
88.6
86.4
84.1
81.8
79.5
77.3
75.0
72.7
70.5
68.2
65.9
63.6
61.4
59.1
56.8
54.5
52.3
50.0
(%)
12
quantization error of
Please see the "PWM Output and Current Accuracy" section
for more details.
Sense Current
(Amps)*
-1.00
-0.95
-0.90
-0.85
-0.80
-0.75
-0.70
-0.65
-0.60
-0.55
-0.50
-0.45
-0.40
-0.35
-0.30
-0.25
-0.20
-0.15
-0.10
-0.05
-0.00
1
⁄
2
bit is not shown in these tables.
Duty Cycle
13.6
15.9
18.2
20.5
22.7
25.0
27.3
29.5
31.8
34.1
36.4
38.6
40.9
43.2
45.5
47.7
50.0
11.4
(%)
4.5
6.8
9.1