ADM690A/ADM692A/ADM802L/M/ADM805L/M
–3–
REV. 0
ABSOLUTE MAXIMUM RATINGS*
(T
A
= +25°C unless otherwise noted)
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V
V
BATT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V
All Other Inputs . . . . . . . . . . . . . . . . . .–0.3 V to V
CC
+ 0.3 V
Input Current
V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200 mA
V
BATT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA
GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Digital Output Current . . . . . . . . . . . . . . . . . . . . . . . . 20 mA
Power Dissipation, N-8 DIP . . . . . . . . . . . . . . . . . . . 400 mW
θ
JA
Thermal Impedance . . . . . . . . . . . . . . . . . . . . 120°C/W
Power Dissipation, SO-8 SOIC . . . . . . . . . . . . . . . . . 500 mW
θ
JA
Thermal Impedance . . . . . . . . . . . . . . . . . . . . 110°C/W
Operating Temperature Range
Industrial (A Version) . . . . . . . . . . . . . . . . –40°C to +85°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . .+300°C
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . .+215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . .+220°C
Storage Temperature Range . . . . . . . . . . . . –65°C to +150°C
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >4 kV
*Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those listed in the
operational sections of this specification is not implied. Exposure to absolute
maximum ratings for extended periods of time may affect device reliability.
ORDERING GUIDE
Temperature Package
Model Range Option
ADM690AAN –40°C to +85°C N-8
ADM690AARN –40°C to +85°C SO-8
ADM690AARM –40°C to +85°C RM-8
ADM692AAN –40°C to +85°C N-8
ADM692AARN –40°C to +85°C SO-8
ADM802LAN –40°C to +85°C N-8
ADM802LARN –40°C to +85°C SO-8
ADM802MAN –40°C to +85°C N-8
ADM802MARN –40°C to +85°C SO-8
ADM805LAN –40°C to +85°C N-8
ADM805LARN –40°C to +85°C SO-8
ADM805MAN –40°C to +85°C N-8
ADM805MARN –40°C to +85°C SO-8
PIN CONFIGURATIONS
PIN FUNCTION DESCRIPTION
Mnemonic Function
V
CC
Power Supply Input: +5 V Nominal.
V
BATT
Backup Battery Input. As V
CC
falls below the reset threshold and below V
BATT
by 20 mV, V
BATT
will be switched
to V
OUT
. On power-up as V
CC
rises to 20 mV above V
BATT
, V
OUT
will be switched back to V
CC
.
V
OUT
Output Voltage. When V
CC
is above the reset threshold, V
OUT
is connected to V
CC
through an on chip switch.
When V
CC
is below the reset threshold, the higher of V
CC
or V
BATT
is connected to V
OUT
.
GND 0 V. Ground reference for all signals.
PFI Power Fail Comparator Input. If PFI is less than 1.25 V, the power fail output
PFO goes low. If unused, PFI
should be connected to V
CC
or GND.
PFO Power Fail Comparator Output. If PFI is less than 1.25 V, the power fail output PFO goes low.
RESET Logic Output. RESET goes low if
1. V
CC
falls below the Reset Threshold
2. The watchdog timer is not serviced within its timeout period (1.6 seconds)
The reset threshold is typically 4.65 V for the ADM690A/ADM802L/ADM805L and 4.4 V for the ADM692A/
ADM802M/ADM805M.
RESET remains low for 200 ms after V
CC
returns above the threshold. RESET also
goes low for 200 ms if the watchdog timer is enabled but not serviced within its timeout period.
RESET Active high RESET output (ADM805L/M only). This is the inverse of
RESET. The asserted (high) level is V
CC
or V
BATT
whichever is higher.
WDI Watchdog Input. WDI is a three level input. If WDI remains either high or low for longer than 1.6 s, (RESET)
(RESET) is activated. The timer resets with each transition on the WDI line. The watchdog timer may be
disabled if WDI is left floating or is connected to a high impedance three stated logic output.
1
2
3
4
8
7
6
5
TOP VIEW
(Not to Scale)
ADM690A
ADM692A
ADM802L
ADM802M
ADM805L
ADM805M
PFO
WDI
RESET (RESET)
V
BATT
V
OUT
V
CC
GND
PFI