Datasheet

ADM8696/ADM8697–SPECIFICATIONS
P
arameter Min Typ Max Units Test Conditions/Comments
V
CC
Operating Voltage Range 3.0 5.5 V
V
BATT
Operating Voltage Range 2.0 V
CC
– 0 3 V
BATTERY BACKUP SWITCHING (ADM8696)
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, V
CC
< V
BATT
– 0.2 V
Supply Current (Excludes I
OUT
) 115 200 µAI
OUT
= 100 mA
Supply Current in Battery Backup Mode 0.4 1 µAV
CC
= 0 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
Battery Switchover Threshold 70 mV Power-Up
V
CC
– V
BATT
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 30 mA BATT ON = V
OUT
= 2.4 V Sink Current
0.5 2.5 25 µA BATT ON = V
OUT
, V
CC
= 0 V, Source Current
RESET AND WATCHDOG TIMER
Low Line Threshold (LL
IN
) 1.25 1.3 1.35 V
Reset Timeout Delay 35 50 70 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 4032 4063 4097 Cycles Long Period
960 1011 1025 Cycles Short Period
Minimum WDI Input Pulse Width 50 ns V
IL
= 0.8, V
IH
= 3.75 V, V
CC
= 5 V
100 ns V
IL
= 0.8, V
IH
= 3.5 V, V
CC
= 5 V
100 ns V
IL
= 0.8, V
IH
= 2.6 V, V
CC
= 3 V
RESET Output Voltage @ V
CC
= +1 V 4 20 mV I
SINK
= 10 µA, V
CC
= 1 V
RESET, RESET Output Voltage 0.1 0.4 V I
SINK
= 400 µA, V
CC
= 2 V, V
BATT
= 0 V
0.1 0.4 V I
SINK
= 3.2 mA, 3 V < V
CC
< 5.5 V
3.5 V I
SOURCE
= 1 µA, V
CC
= 5 V
2.7 V I
SOURCE
= 1 µA, V
CC
= 3 V
LOW LINE, WDO Output Voltage 0.4 V I
SINK
= 3.2 mA,
3.5 V I
SOURCE
= 1 µA, V
CC
= 5 V
2.7 V I
SOURCE
= 1 µA, V
CC
= 3 V
Output Short Circuit Source Current 1 10 25 µAV
CC
= 5 V
WDI Input Threshold
1
Logic Low 0.8 V
Logic High 3.5 V V
CC
= 5 V
1.2 V V
CC
= 3 V
WDI Input Current 1 10 µA WD1 = V
OUT
, (V
CC
)
–10 –1 µA WD1 = 0 V
POWER FAIL DETECTOR
PFI Input Threshold 1.2 1.3 1.4 V
PFI–LL
IN
Threshold Difference –50 ± 15 +50 mV
PFI Input Current –25 ± 0.01 +25 nA
LL
IN
Input Current –50 ± 0.01 +50 nA
PFO Output Voltage 0.4 V I
SINK
= 3.2 mA
3.5 V I
SOURCE
= 1 µA
2.7 V I
SOURCE
= 1 µA, V
CC
= 3 V
PFO Short Circuit Source Current 1 10 25 µA PFI = Low, PFO = 0 V
CHIP ENABLE GATING (ADM8697)
CE
IN
Threshold 0.8 V V
IL
3.0 V V
IH
1.2 V V
CC
= 3 V
CE
IN
Pull-Up Current 3 µA
CE
OUT
Output Voltage 0.4 V I
SINK
= 3.2 mA
V
CC
– 0.5 V I
SOURCE
= 800 µA
CE Propagation Delay 2 7 ns V
CC
= 5.0 V
4nsV
CC
= 3.0 V
OSCILLATOR
OSC IN Input Current ± 2 µA
OSC SEL Input Pull-Up Current 5 µA
OSC IN Frequency Range 0 500 kHz OSC SEL = 0 V
OSC IN Frequency with Ext. Capacitor 4 kHz OSC SEL = 0 V, C
OSC
= 47 pF
NOTE
1
WDI is a three-level input internally biased to 38% of V
CC
and has an input impedance of approximately 5 M.
Specifications subject to change without notice.
–2–
(V
CC
= Full Operating Range, V
BATT
= +2.8 V, T
A
= T
MIN
to T
MAX
unless otherwise noted.)
REV. A