LM35
SNIS159C –AUGUST 1999–REVISED JULY 2013
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°F
20 k
67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
7 V
+
20 mF
20 LEDs
18
1
10
9
18
1
10
9
LM3914
LM3914
2
3
4
5
6
7
8
2
3
4
5
6
7
8
NC
7 V
7 V
1.2 k*
+
VA
OUT
LM35
HEAT
FINS
VC
VB
499*
499*
200*
1.5 k*
1 k*
+
RB
1 k
RC
1 k
1.5 k*
1 mF
RA
1 k
*=1% or 2% film resistor
Trim RB for VB = 3.075 V
Trim RC for VC = 1.955 V
Trim RA for VA = 0.075 V + 100 mV/°C ×Tambient
Example, VA = 2.275 V at 22°C
Figure 26. Bar-Graph Temperature Display (Dot Mode)
16
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