ADT7421
TYPICAL CHARACTERISTICS
1.00
80
0.75
60
0.50
40
D+ to GND
0.25
20
0
0
−0.25
−0.50
−20
D+ to Vcc
−40
−0.75
−1.00
1
10
100
1000
CAPACITANCE (pF)
Figure 3. Temperature Error vs. D+, D−
Capacitance
10,000
−60
−80
0 10 20 30 40 50 60 70 80 90 100
LEAKAGE RESISTANCE (MW)
Figure 4. Temperature Error vs. PCB Leakage
Resistance
5
4
3
2
1
0
−1
−2
−3
−4
−5
−50 −25 0 25 50 75 100 125 150
TA & TD OIL BATH TEMPERATURE (°C)
Figure 5. Local Temperature Error vs.
Temperature
5
4
3
2
1
0
−1
−2
−3
−4
−5
−50 −25 0 25 50 75 100 125 150
TA & TD OIL BATH TEMPERATURE (°C)
Figure 6. Remote Temperature Error vs.
Temperature
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
20
40
60
80
100 120
RS (W)
Figure 7. Temperature Error vs. Series
Resistance on D+, D−
6
4
2
250 mV
0
100 mV
−2
−4
−6
0 1E+08 2E+08 3E+08 4E+08 5E+08 6E+08
NOISE FREQUENCY
Figure 8. External Temp Error vs. Power
Supply Noise
http://onsemi.com
5