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ADM805LARN Datasheet(PDF) 3 Page - Analog Devices |
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ADM805LARN Datasheet(HTML) 3 Page - Analog Devices |
3 / 8 page ADM690A/ADM692A/ADM802L/M/ADM805L/M –3– REV. 0 ABSOLUTE MAXIMUM RATINGS* (TA = +25 °C unless otherwise noted) VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V VBATT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V All Other Inputs . . . . . . . . . . . . . . . . . . –0.3 V to VCC + 0.3 V Input Current VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200 mA VBATT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 VCC Power Supply Input: +5 V Nominal. VBATT Backup Battery Input. As VCC falls below the reset threshold and below VBATT by 20 mV, VBATT will be switched to VOUT. On power-up as VCC rises to 20 mV above VBATT, VOUT will be switched back to VCC. VOUT Output Voltage. When VCC is above the reset threshold, VOUT is connected to VCC through an on chip switch. When VCC is below the reset threshold, the higher of VCC or VBATT is connected to VOUT. 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 VCC 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. VCC 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 VCC 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 VCC or VBATT 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) VBATT VOUT VCC GND PFI |
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