Datasheet

Typical Performance Curves–ADM690–ADM695
5.00
4.80
0 100
4.95
4.85
20
4.90
806040
V
CC
= 5V
T
A
= +25°C
SLOPE = 1.5Ω
V
OUT
– V
I
OUT
– mA
Figure 8. V
OUT
vs. I
OUT
Normal
Operation
1.303
1.299
20 120
1.302
1.300
40
1.301
1008060
PFI INPUT THRESHOLD – V
TEMPERATURE – ° C
Figure 11. PFI Input Threshold vs.
Temperature
6
1.25
0
2
0
1
3
4
5
0.80.5 0.60.3 0.4 0.70.20.1
V
PFI
1.3V
30pF
PFO
V
CC
= 5V
T
A
= +25 ° C
1.35
TIME – µs
Figure 14. Power Fail Comparator
Response Time
2.80
2.76
0 1000
2.79
2.77
200
2.78
800600400
I
OUT
– µA
V
OUT
– V
SLOPE = 20Ω
V
CC
= 0V
V
BATT
= +2.8V
T
A
= +25°C
Figure 9. V
OUT
vs. I
OUT
Battery
Backup
53
49
20 120
52
50
40
51
1008060
V
CC
= +5V
TEMPERATURE – ° C
RESET ACTIVE TIME – ms
ADM690
ADM691
ADM692
ADM693
Figure 12. Reset Active Time vs.
Temperature
6
90
1.25
0
1.35
2
0
1
3
4
5
8050 6030 40 702010
V
PFI
1.3V
30pF
PFO
V
CC
= 5V
T
A
= +25 ° C
TIME – µs
Figure 15. Power Fail Comparator
Response Time
10
90
100
0%
3.36 V
500ms
A4
1V1V
Figure 10. Reset Output Voltage vs.
Supply Voltage
4.70
4.62
20 120
4.68
4.64
40
4.66
1008060
TEMPERATURE – °C
RESET VOLTAGE THRESHOLD – V
V
CC
= +5V
POWER-UP
POWER-DOWN
ADM690
ADM691
ADM694
ADM695
Figure 13. Reset Voltage Threshold
vs. Temperature
6
0
1.8
1.25
0
1.35
2
0
1
3
4
5
1.61.0 1.20.6 0.8 1.40.40.2
V
CC
= 5V
T
A
= +25 ° C
V
PFI
1.3V
30pF
PFO
+5V
10k
+5V
TIME – µs
Figure 16. Power Fail Comparator
Response Time with Pull-Up Resistor
REV. A
–9–
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