ADM6825 Analog Devices, ADM6825 Datasheet
ADM6825
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ADM6825 Summary of contents
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... Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. Low Voltage Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SOT-23 ADM6821/ADM6822/ADM6823/ADM6824/ADM6825 FUNCTIONAL BLOCK DIAGRAM ADM6823 V CC ...
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... ADM6821/ADM6822/ADM6823/ADM6824/ADM6825 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 ESD Caution.................................................................................. 5 Pin Configurations and Function Descriptions ........................... 6 Typical Performance Characteristics ............................................. 7 Circuit Description........................................................................... 9 Reset Output ................................................................................. 9 Manual Reset Input ...................................................................... 9 REVISION HISTORY 6/05—Revision 0: Initial Version Watchdog Input .............................................................................9 Application Information................................................................ 10 Watchdog Input Current ........................................................... 10 Negative-Going V Transients ................................................ 10 CC Ensuring Reset Valid to V Watchdog Software Considerations ...
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... RESET OUTPUT LEAKAGE CURRENT (Open-Drain Only) RESET OUTPUT VOLTAGE (Push-Pull Only MANUAL RESET INPUT (ADM6821/ADM6822/ADM6823/ADM6825) MR Input Threshold Input Pulse Width MR Glitch Rejection MR to Reset Delay MR Pull-Up Resistance ADM6821/ADM6822/ADM6823/ADM6824/ADM6825 = 2 3.6 V for ADM682_T/S/ Min Typ Max 1 5 4.50 4.63 4.75 4.25 4.38 4.50 3 ...
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... ADM6821/ADM6822/ADM6823/ADM6824/ADM6825 Parameter WATCHDOG INPUT (ADM6821/ADM6822/ADM6823/ADM6824) Watchdog Timeout Period WDI Pulse Width WDI Input Threshold WDI Input Current Min Typ Max Unit 1.12 1.6 2.40 sec 50 ns 0.3 × 0.7 × 120 160 μA μA −20 −15 Rev Page Test Conditions/Comments WDI ...
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... 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. ADM6821/ADM6822/ADM6823/ADM6824/ADM6825 Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress Rating rating only ...
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... WDI Description Active-Low Reset Output. Asserted whenever V Open-Drain Output Stage for the ADM6822. Push-Pull Output Stage for the ADM6823/ADM6824/ADM6825. Active-High Push-Pull Reset Output. Ground. Manual Reset Input. This is an active-low input, which, when forced low for at least 1 μs, generates a reset. It features a 50 kΩ internal pull-up. ...
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... TEMPERATURE (°C) Figure 7. Normalized RESET Timeout Period vs. Temperature 100 –40 – TEMPERATURE (°C) Figure RESET Output Delay vs. Temperature CC ADM6821/ADM6822/ADM6823/ADM6824/ADM6825 1.20 1.15 1.10 1.05 1.00 0.95 0.90 80 100 120 –40 Figure 9. Normalized Watchdog Timeout Period vs. Temperature 1.05 1.04 1.03 1.02 1.01 1.00 0.99 0.98 0.97 0.96 0.95 80 100 120 –40 ...
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... ADM6821/ADM6822/ADM6823/ADM6824/ADM6825 0. 2.9V CC 0.15 0.10 0. (mA) SINK Figure 12. Voltage Output Low vs. I 2.92 2.90 2.88 2.86 2.84 2. SINK Rev Page 2. 0.2 0.4 0.6 0.8 I (mA) SOURCE Figure 13. Voltage Output High vs. I SOURCE 1.0 ...
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... If the user detects a problem with the system’s operation, a manual reset input is available (ADM6821/ADM6822/ ADM6823/ADM6825) to reset the microprocessor by means of an external push-button, for example. RESET OUTPUT The ADM6821 features an active-high push-pull reset output. ...
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... ADM6821/ RESET ADM6823/ ADM6824/ ADM6824/ 100kΩ ADM6825 ADM6825 GND Figure 16. Ensuring Reset Valid to V WATCHDOG SOFTWARE CONSIDERATIONS In implementing the microprocessor’s watchdog strobe code, quickly switching WDI low-high and then high-low (minimizing WDI high time) is desirable for current consumption reasons. However, a more effective way of using the watchdog function can be considered ...
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... ADM6823TYRJZ-RL7 3.08 2 ADM6824TYRJZ-R7 3.08 ADM6825TYRJZ- ordering nonstandard models, complete the ordering code shown in Figure 20 by inserting the part number and reset threshold suffixes. Contact Sales for availability of nonstandard models Pb-free part. ADM6821/ADM6822/ADM6823/ADM6824/ADM6825 2.90 BSC 5 4 2.80 BSC 1.60 BSC PIN 1 0.95 BSC 1.90 BSC 1.45 MAX ...
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... ADM6821/ADM6822/ADM6823/ADM6824/ADM6825 NOTES © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04535–0–6/05(0) Rev Page ...