ADM8691 Ver la hoja de datos (PDF) - Analog Devices
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ADM8691 Datasheet PDF : 24 Pages
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ADM8690/ADM8691/ADM8695
Data Sheet
SPECIFICATIONS
VCC = full operating range, VBATT = 2.8 V, TA = TMIN to TMAX, unless otherwise noted.
Table 2.
Parameter
BATTERY BACKUP SWITCHING
VCC Operating Voltage Range
VBATT Operating Voltage Range
VOUT Output Voltage
VOUT in Battery Backup Mode
Supply Current (Excludes IOUT)
Supply Current in Battery Backup Mode
Battery Standby Current
+ = Discharge, − = Charge
Battery Switchover Threshold
VCC − VBATT
Battery Switchover Hysteresis
BATT ON Output Voltage
BATT ON Output Short-Circuit Current
RESET AND WATCHDOG TIMER
Reset Voltage Threshold
Reset Threshold Hysteresis
Reset Timeout Delay
ADM8690 and ADM8691
ADM8695
Watchdog Timeout Period, Internal
Oscillator
Watchdog Timeout Period, External Clock
Minimum WDI Input Pulse Width
RESET Output Voltage at VCC = 1 V
RESET, LOW LINE Output Voltage
RESET, WDO Output Voltage
Output Short-Circuit Source Current
Output Short-Circuit Sink Current
WDI Input Threshold1
Logic Low
Logic High
WDI Input Current
POWER-FAIL DETECTOR
PFI Input Threshold
PFI Input Current
PFO Output Voltage
PFO Short-Circuit Source Current
PFO Short-Circuit Sink Current
Min
Typ
Max
4.75
5.5
2.0
4.25
VCC − 0.005 VCC − 0.0025
VCC − 0.2
VCC − 0.125
VBATT − 0.005 VBATT − 0.002
140
200
0.4
1
−0.1
70
50
20
55
0.5
2.5
+0.02
0.3
25
4.5
4.65
4.73
40
35
140
1.0
70
3840
768
50
3.5
3.5
1
50
200
1.6
100
4064
1011
4
0.05
10
25
70
280
2.25
140
4097
1025
20
0.4
0.4
25
0.8
3.5
1
10
−10
−1
1.25
1.3
1.35
−25
±0.01
+25
0.4
3.5
1
3
25
25
Unit
Test Conditions/Comments
V
V
V
IOUT = 1 mA
V
IOUT ≤ 100 mA
V
IOUT = 250 μA, VCC < VBATT − 0.2 V
μA
IOUT = 100 μA
μA
VCC = 0 V, VBATT = 2.8 V
5.5 V > VCC > VBATT + 0.2 V
μA
TA = 25°C
mV
Power-up
mV
Power-down
mV
V
ISINK = 3.2 mA
mA
BATT ON = VOUT = 4.5 V, sink current
μA
BATT ON = 0 V, source current
V
mV
ms
OSC SEL = high
ms
OSC SEL = high
Seconds Long period
ms
Cycles
Cycles
ns
mV
V
V
V
V
μA
mA
Short period
Long period
Short period
VIL = 0.4 V, VIH = 3.5 V
ISINK = 10 μA, VCC = 1 V
ISINK = 1.6 mA, VCC = 4.25 V
ISOURCE = 1 μA
ISINK = 1.6 mA
ISOURCE = 1 μA
V
V
μA
WDI = VOUT
μA
WDI = 0 V
V
VCC = 5 V
nA
V
ISINK = 3.2 mA
V
ISOURCE = 1 μA
μA
PFI = low, PFO = 0 V
mA
PFI = high, PFO = VOUT
Rev. C | Page 4 of 24
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