Datasheet

ADM691A/ADM693A/ADM800L/M–SPECIFICATIONS
–2–
REV. 0
(V
CC
= 4.75 V to 5.5 V (ADM691A, ADM800L) 4.5 V to 5.5 V (ADM693A, ADM800M) V
BATT
= +2.8 V, T
A
= T
MIN
to T
MAX
unless otherwise noted)
Parameter Min Typ Max Unit Test Conditions/Comments
BATTERY BACKUP SWITCHING
V
CC
, V
BATT
Operating Voltage Range 0 5.5 V
V
OUT
Output Voltage V
CC
– 0.05 V
CC
– 0.02 V I
OUT
= 25 mA
V
CC
– 0.3 V
CC
– 0.2 V I
OUT
= 250 mA
V
CC
to V
OUT
Output Resistance 0.8 1.2 Ω V
CC
= 4.5 V
V
OUT
in Battery Backup Mode V
BATT
– 0.3 V V
BATT
= 4.5 V, I
OUT
= 20 mA
V
BATT
– 0.25 V V
BATT
= 2.8 V, I
OUT
= 10 mA
V
BATT
– 0.15 V V
BATT
= 2.0 V, I
OUT
= 5 mA
V
BATT
to V
OUT
Output Resistance 12 Ω V
BATT
= 4.5 V
20 Ω V
BATT
= 2.8 V
25 Ω V
BATT
= 2.0 V
Supply Current (Excludes I
OUT
) 70 100 µAV
CC
> (V
BATT
– 1 V)
Supply Current in B. Backup (Excludes I
OUT
) 0.04 1 µAV
CC
< (V
BATT
– 1.2 V), V
BATT
= 2.8 V
Battery Standby Current 5.5 V > V
CC
> V
BATT
+ 0.2 V
(+ = Discharge, – = Charge) –0.1 +0.02 µA(V
BATT
+0.2 V) < V
CC
, T
A
= +25°C
–1.0 +0.02 µA(V
BATT
+0.2 V) < V
CC
Battery Switchover Threshold V
BATT
+ 0.03 V Power Up
V
CC
–V
BATT
V
BATT
– 0.03 V Power Down
Battery Switchover Hysteresis 60 mV
BATT ON Output Voltage Low 0.1 0.4 V I
SINK
= 3.2 mA
0.7 1.5 V I
SINK
= 25 mA
BATT ON Output Short Circuit Current 60 mA Sink Current
1 15 100 µA Source Current
RESET AND WATCHDOG TIMER
Reset Voltage Threshold
ADM691A, ADM800L 4.5 4.65 4.75 V
ADM693A, ADM800M 4.25 4.40 4.50 V
ADM800L, V
CC
Falling 4.55 4.70 V T
A
= +25°C
ADM800M, V
CC
Falling 4.3 4.45 V T
A
= +25°C
Reset Threshold Hysteresis 15 mV
V
CC
to RESET Delay 80 µs Power Down
LOW LINE to RESET Delay 800 ns
Reset Timeout Period Internal Oscillator 140 200 280 ms Power Up
Reset Timeout Period External Clock 2048 Cycles Power Up
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 4096 Cycles Long Period
1024 Cycles Short Period
Minimum WDI Input Pulse Width 100 ns V
IL
= 0.4, V
IH
= 0.75 × V
CC
RESET Output Voltage 0.004 0.3 V I
SINK
= 50 µA, V
CC
= 1 V, V
BATT
= 0 V
0.1 0.4 V I
SINK
= 3.2 mA, V
CC
= 4.25 V
3.5 V I
SOURCE
= 1.6 mA, V
CC
= 5 V
RESET Output Short Circuit Current 7 20 mA
RESET Output Voltage Low 0.1 0.4 V I
SINK
= 3.2 mA
LOW LINE Output Voltage 0.4 V I
SINK
= 3.2 mA, V
CC
= 4.25 V
3.5 V I
SOURCE
= 1 µA, V
CC
= 5 V
LOW LINE Short Circuit Source Current 1 15 100 µA
WDO Output Voltage 0.4 V I
SINK
= 3.2 mA, V
CC
= 4.25 V
3.5 V I
SOURCE
= 500 µA, V
CC
= 5 V
WDO Short Circuit Source Current 3 10 mA
WDI Input Threshold
Logic Low 0.8 V
Logic High 0.75 × V
CC
V
WDI Input Current –50 –10 µA WDI = 0 V
20 50 µA WDI = V
OUT
POWER FAIL DETECTOR
PFI Input Threshold ADM69xA 1.2 1.25 1.3 V V
CC
= 5 V
PFI Input Threshold ADM800L/M 1.225 1.25 1.275 V V
CC
= 5 V
PFI Input Current ±0.01 ±25 nA
PFO Output Voltage 0.4 V I
SINK
= 3.2 mA
3.5 I
SOURCE
= 1 µA
PFO Short Circuit Source Current 1 15 100 µA
PFI to PFO Delay 25 µsV
IN
= –20 mV
60 µsV
IN
= 20 mV