ISO7420_15 Datasheet, PDF (12/28 Pages) Texas Instruments – ISO742x Low-Power Dual-Channel Digital Isolators

ISO7420, ISO7420M, ISO7421
SLLS984I – JUNE 2009 – REVISED JULY 2015
6.14 Typical Characteristics
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14
1.6
12
V_CC1, V_CC2 at 3.3 V
10
8
V_CC1, V_CC2 at 5 V
6
4
2
1.5
VIT+, 5 V
1.4
1.3
VIT+, 3.3 V
1.2
1.1
VIT−, 5 V
1.0
VIT−, 3.3 V
0.9
0
−55 −35 −15 5
25 45 65 85 105 125
T_A − Free-Air Temperature − °C
G004
Figure 1. Propagation Delay Time vs Free-Air Temperature
2.62
2.61
2.60
FS+
2.59
2.58
2.57
2.56
2.55
FS−
2.54
2.53
2.52
−55 −35 −15 5
25 45 65 85 105 125
0.8
−55 −35 −15 5
25 45 65 85 105 125
T_A − Free-Air Temperature − °C
G005
Figure 2. Input Voltage Switching Threshold vs Free-Air
Temperature
0
−10 ^{TA = 25°C}
−20
−30
−40
−50
V_CC1, V_CC2 at 3.3 V
−60
−70
V_CC1, V_CC2 at 5 V
−80
−90
0
1
2
3
4
5
6
T_A − Free-Air Temperature − °C
G006
Figure 3. Fail-Safe Voltage Threshold vs Free-Air
Temperature
80
T_A = 25°C
70
V_OH − High-Level Output Voltage − V
G007
Figure 4. High-Level Output Current vs High-Level Output
Voltage
60
V_CC1, V_CC2 at 5 V
50
40
30
V_CC1, V_CC2 at 3.3 V
20
10
0
0
1
2
3
4
5
6
V_OL − Low-Level Output Voltage − V
G008
Figure 5. Low-Level Output Current vs Low-Level Output Voltage
12
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