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ADM8690 Datasheet(PDF) 4 Page - Analog Devices

Part # ADM8690
Description  Microprocessor Supervisory Circuits
PDF  20 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADM8690 Datasheet(HTML) 4 Page - Analog Devices

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ADM8690/ADM8691/ADM8692/ADM8693/ADM8695
Rev. B | Page 4 of 20
SPECIFICATIONS
VCC = full operating range, VBATT = 2.8 V, TA = TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
Min
Typ
Max
Unit
Test Conditions/Comments
BATTERY BACKUP SWITCHING
V
CC Operating Voltage Range
ADM8690, ADM8691, ADM8695
4.75
5.5
V
ADM8692, ADM8693
4.5
5.5
V
V
BATT Operating Voltage Range
ADM8690, ADM8691, ADM8695
2.0
4.25
V
ADM8692, ADM8693
2.0
4.0
V
V
OUT Output Voltage
V
CC − 0.005
V
CC − 0.0025
V
I
OUT = 1 mA
V
CC − 0.2
V
CC − 0.125
V
I
OUT ≤ 100 mA
V
OUT in Battery Backup Mode
V
BATT − 0.005
V
BATT − 0.002
V
I
OUT = 250 µA, VCC < VBATT − 0.2 V
Supply Current (Excludes I
OUT)
140
200
µA
I
OUT = 100 µA
Supply Current in Battery Backup Mode
0.4
1
µA
V
CC = 0 V, VBATT = 2.8 V
Battery Standby Current
5.5 V > V
CC > VBATT + 0.2 V
+ = Discharge, − = Charge
−0.1
+0.02
µA
T
A = 25°C
Battery Switchover Threshold
70
mV
Power-up
V
CC – VBATT
50
mV
Power-down
Battery Switchover Hysteresis
20
mV
BATT ON Output Voltage
0.3
V
I
SINK = 3.2 mA
BATT ON Output Short-Circuit Current
55
mA
BATT ON = V
OUT = 4.5 V sink current
0.5
2.5
25
µA
BATT ON = 0 V source current
RESET AND WATCHDOG TIMER
Reset Voltage Threshold
ADM8690, ADM8691, ADM8695
4.5
4.65
4.73
V
ADM8692, ADM8693
4.25
4.4
4.48
V
Reset Threshold Hysteresis
40
mV
Reset Timeout Delay
ADM8690, ADM8691, ADM8692,
ADM8693,
35
50
70
ms
OSC SEL = high
ADM8695
140
200
280
ms
OSC SEL = high
Watchdog Timeout Period, Internal Oscillator
1.0
1.6
2.25
s
Long period
70
100
140
ms
Short period
Watchdog Timeout Period, External Clock
3840
4064
4097
cycles
Long period
768
1011
1025
cycles
Short period
Minimum WDI Input Pulse Width
50
ns
V
IL = 0.4, VIH = 3.5 V
RESET Output Voltage @ VCC = 1 V
4
20
mV
I
SINK = 10 µA, VCC = 1 V
RESET, LOW LINE Output Voltage
0.05
0.4
V
I
SINK = 1.6 mA, VCC = 4.25 V
3.5
V
I
SOURCE = 1 µA
RESET, WDO Output Voltage
0.4
V
I
SINK = 1.6 mA
3.5
V
I
SOURCE = 1 µA
Output Short-Circuit Source Current
1
10
25
µA
Output Short-Circuit Sink Current
25
mA
WDI Input Threshold1
Logic Low
0.8
V
Logic High
3.5
V
WDI Input Current
1
10
µA
WDI = V
OUT
−10
−1
µA
WDI = 0 V



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