ADM696 Analog Devices, ADM696 Datasheet
ADM696
Specifications of ADM696
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ADM696 Summary of contents
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... These functions include P reset, backup-battery switchover, watchdog timer, CMOS RAM write protection, and power failure warning. The ADM696/ADM697 are available in 16-pin DIP and small outline packages and provide the following functions: 1. Power-On Reset output during power-up, power-down and brownout conditions ...
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... ADM696/ADM697–SPECIFICATIONS P arameter V Operating Voltage Range CC V Operating Voltage Range BATT BATTERY BACKUP SWITCHING (ADM696) V Output Voltage OUT V in Battery Backup Mode OUT Supply Current (Excludes I ) OUT Supply Current in Battery Backup Mode Battery Standby Current (+ = Discharge, – = Charge) Battery Switchover Threshold V – ...
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... ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the ADM696/ADM697 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality ...
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... ADM696/ADM697 Pin No. Mnemonic ADM696 ADM697 — BATT V 2 — OUT GND 4 5 RESET 15 15 WDI 11 11 PFI 9 9 PFO — — 12 OUT BATT ON 5 — LOW LINE 6 6 RESET 16 16 OSC SEL 8 8 OSC WDO ...
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... CMOS RAM or other low power CMOS circuitry. The supply current in battery backup is typi- cally 0.6 A. The ADM696 operates with battery voltages from 2 –0.3 V). High value capacitors, either standard electrolytic or the farad-size double layer capacitors, can also be used for short- term memory backup ...
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... ADM696/ADM697 Table I. ADM696, ADM697 Reset Pulse Width and Watchdog Timeout Selections OSC SEL OSC IN Low External Clock Input Low External Capacitor Floating or High Low Floating or High Floating or High NOTE With the OSC SEL pin low, OSC IN can be driven by an external clock signal external capacitor can be connected between OSC IN and GND. The nominal internal oscillator frequency is 10 ...
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... Logic low. Logic high. The open circuit output voltage is equal OUT Logic low. (ADM696) Logic high. The open circuit voltage is equal OUT WDI is ignored internally disconnected from the internal pullup resistor and does not source or sink current as long as its input voltage is between GND and V ...
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... ADM696/ADM697–Typical Performance Curves 5.00 4.95 4.90 SLOPE = 1.5Ω 4.85 4. – mA OUT Figure 8. V vs. I Normal Operation OUT OUT 2.80 2.79 2.78 SLOPE = 20Ω 2.77 2.76 0 200 400 600 I – µA OUT Figure 9. V vs. Battery Backup OUT 1.303 1.302 1.301 1.300 1.299 TEMPERATURE – Figure 10. PFI Input Threshold vs. Temperature ...
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... If the continuous output current requirements at V 100 lower V –V voltage differential is desired, CC OUT an external PNP pass transistor may be connected in parallel with the internal transistor. The BATT ON output (ADM696) can directly drive the base of the external transistor. PNP TRANSISTOR +5V INPUT 0.1µF POWER ...
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... CC Figure 18a. ADM696 Typical Application Circuit A Figure 18b shows a similar application for the ADM696 but in this case the PFI input monitors the unregulated input to the 7805 voltage regulator. This gives an earlier warning of an im- pending power failure useful with processors operating at low speeds or where there are a significant number of house- keeping tasks to be completed before the power is lost ...
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... REF (0.32) –11– ADM696/ADM697 line drives the Chip Select inputs of the OUT follows CE as long as LL OUT IN IN falls below the reset threshold This prevents IN 0.325 (8.25) 0.300 (7.62) 0.195 (4.95) 0.115 (2.93) 0.015 (0.381) ...
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