ADM9690 Analog Devices, ADM9690 Datasheet - Page 4

• Manufacturer Part Number: ADM9690
• Description: Power Supply and Watchdog Timer Monitoring Circuit
• Manufacturer: Analog Devices

Specifications of ADM9690

• Batt-backup-flg: No
• Manual Reset Capability: No
• Package: SOIC
• Power Fail Indicator: No
• Reset Threshold Summary: 4.31V
• Reset Output-stage: Active-Low/Push-Pull
• Min Reset Timeout (ms): 10,50
• Typ Watchdog Timeout (ms): 0.75,1.5,12.5,25
• Watchdog Timer: Yes

ADM9690
Figure 2. Reset Voltage Threshold vs. Temperature
4.412
4.410
4.408
4.406
4.404
4.402
4.400
4.398
4.396
Figure 1. Reset Output Voltage vs. Supply
–60
CH1
–Typical Performance Curves
1.0V
–30
CH2
0
TEMPERATURE – C
1.0V
+5V
30
V
OSC SEL1
OSC SEL2
MON
M 500ms
60
4.31V
ADM9690
WATCHDOG
CH1
TIMEBASE
90
Figure 5. Typical Application Circuit
380mV
120
GND
V
CC
V
RESET
CC
RESET(2)
RESET(1)
WATCHDOG
TRANSITION
TIMER
TIMER
DETECTOR
–4–
Figure 3. Watchdog and Reset Timeout Period vs. Supply
@ –40 ° C
WATCHDOG
INPUT (WDI)
RESET(2)
RESET(1)
72.0
71.6
71.2
70.8
70.4
70.0
69.6
69.2
68.8
Figure 4. Supply Current vs. Temperature
100
10
–60
2.5
3.0
–30
RESET2/TIMEOUT
WATCHDOG TIMEOUT
3.5
RESET1/TIMEOUT
RESET
RESET
I/O LINE
AUXILIARY
CIRCUITRY
PERIOD
0
TEMPERATURE – C
4.0
P
V
CC
4.5
30
– Volts
5.0
60
5.5
90
6.0
120
6.5
REV. A