ADM8690 Analog Devices, ADM8690 Datasheet - Page 4

• Manufacturer Part Number: ADM8690
• Description: µP Supervisory Circuit, 8-Pin DIP
• Manufacturer: Analog Devices

Specifications of ADM8690

• Batt-backup-flg: Yes
• Product Description: uP Supv Ckt, Watchdog Timer, Backup Battery Switching, 4.65V Reset Trip Voltage, 8-Pin DIP & SOIC
• Reset Threshold (v): 4.65
• Min Reset Timeout (ms): 35
• Reset Output-stage: Active-Low/Push-Pull
• Backup-battery Switch: Yes
• Chip Enable Gating: ---
• Typ Watchdog Timeout (ms): 100,1600
• Package: DIP,SOIC
• Us Price 1000-4999: n/a

ADM8690/ADM8691/ADM8695
SPECIFICATIONS
V
Table 2.
Parameter
BATTERY BACKUP SWITCHING
RESET AND WATCHDOG TIMER
POWER-FAIL DETECTOR
CC
V
V
V
V
Supply Current (Excludes I
Supply Current in Battery Backup Mode
Battery Standby Current
Battery Switchover Threshold
V
Battery Switchover Hysteresis
BATT ON Output Voltage
BATT ON Output Short-Circuit Current
Reset Voltage Threshold
Reset Threshold Hysteresis
Reset Timeout Delay
Watchdog Timeout Period, Internal
Watchdog Timeout Period, External Clock
Minimum WDI Input Pulse Width
RESET Output Voltage at V
RESET, LOW LINE Output Voltage
RESET, WDO Output Voltage
Output Short-Circuit Source Current
Output Short-Circuit Sink Current
WDI Input Threshold
WDI Input Current
PFI Input Threshold
PFI Input Current
PFO Output Voltage
PFO Short-Circuit Source Current
PFO Short-Circuit Sink Current
CC
BATT
OUT
OUT
CC
= full operating range, V
+ = Discharge, − = Charge
ADM8690
ADM8695
Oscillator
Logic Low
Logic High
Operating Voltage Range
− V
Output Voltage
in Battery Backup Mode
Operating Voltage Range
BATT
and
ADM8691
1
OUT
CC
BATT
= 1 V
)
= 2.8 V, T
A
= T
MIN
Min
4.75
2.0
V
V
V
−0.1
0.5
4.5
35
140
1.0
70
3840
768
50
3.5
3.5
1
3.5
−10
1.25
−25
3.5
1
CC
CC
BATT
to T
− 0.005
− 0.2
− 0.005
MAX
, unless otherwise noted.
Rev. C | Page 4 of 24
Typ
V
V
V
140
0.4
70
50
20
55
2.5
4.65
40
50
200
1.6
100
4064
1011
4
0.05
10
25
1
−1
1.3
±0.01
3
25
CC
CC
BATT
− 0.0025
− 0.125
− 0.002
Max
5.5
4.25
200
1
+0.02
0.3
25
4.73
70
280
2.25
140
4097
1025
20
0.4
0.4
25
0.8
10
1.35
+25
0.4
25
Unit
V
V
V
V
V
μA
μA
μA
mV
mV
mV
V
mA
μA
V
mV
ms
ms
Seconds
ms
Cycles
Cycles
ns
mV
V
V
V
V
μA
mA
V
V
μA
μA
V
nA
V
V
μA
mA
Test Conditions/Comments
I
I
I
I
V
5.5 V > V
T
Power-down
I
BATT ON = V
BATT ON = 0 V, source current
OSC SEL = high
OSC SEL = high
Long period
Short period
Short period
V
I
I
I
I
I
WDI = V
WDI = 0 V
V
I
I
PFI = low, PFO = 0 V
PFI = high, PFO = V
Power-up
Long period
OUT
OUT
OUT
OUT
SINK
SINK
SINK
SOURCE
SINK
SOURCE
SINK
SOURCE
A
CC
IL
CC
= 25°C
= 0.4 V, V
= 0 V, V
= 5 V
= 1 mA
≤ 100 mA
= 250 μA, V
= 100 μA
= 3.2 mA
= 10 μA, V
= 1.6 mA, V
= 1.6 mA
= 3.2 mA
= 1 μA
= 1 μA
= 1 μA
OUT
CC
BATT
> V
IH
OUT
= 3.5 V
BATT
CC
= 2.8 V
CC
CC
= 4.5 V, sink current
= 1 V
< V
= 4.25 V
+ 0.2 V
OUT
Data Sheet
BATT
− 0.2 V