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Summit Microelectronics, Inc

Tech Support: Applications Note 42
Obtaining Optimum Performance with Summit's ADOC™/Marginer Family



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Obtaining Optimum Performance with Summit's ADOC™/Marginer Family

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Overshoot can also occur on the devices using a START pin (SMM105, SMM205 & SMM605) to begin the ADOC event. Make certain this pin is de-asserted for a short delay time (2-5mS) after powering the marginer to ensure the TRIM_CAPX is fully charged before the ADOC is started.
  

Figure 8: The input to the device's ADC lags the converter according to the time constant of the internal 25k and the CAPX value. Choosing a time constant of 2mS per µF of TRIMCAPX guarantees the device to be ready (TRIMCAPX fully charged) before ADOC is engaged.

Figure 8: The input to the device's ADC lags the converter according to the time constant of the internal 25k and the CAPX value. Choosing a time constant of 2mS per µF of TRIMCAPX guarantees the device to be ready (TRIMCAPX fully charged) before ADOC is engaged.


 
Figure 9: Last Sequence Position Overshoot:UV1 = 0.6V, CAPF=0.01µF
Figure 9: Last Sequence Position Overshoot:
UV1 = 0.6V, CAPF=0.01µF

Figure 10: Last Sequence Position Overshoot:UV1 = 1.15V, CAPF = 0.01µF
Figure 10: Last Sequence Position Overshoot:
UV1 = 1.15V, CAPF = 0.01µF
 

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SUMMIT Microelectronics, Inc. reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. SUMMIT Microelectronics, Inc. assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement. Charts and schedules contained herein reflect representative operating parameters, and may vary depending upon a user's specific application. While the information in this publication has been carefully checked, SUMMIT Microelectronics, Inc. shall not be liable for any damages arising as a result of any error or omission.

SUMMIT Microelectronics, Inc. does not recommend the use of any of its products in life support or aviation applications where the failure or malfunction of the product can reasonably be expected to cause any failure of either system or to significantly affect their safety or effectiveness. Products are not authorized for use in such applications unless SUMMIT Microelectronics, Inc. receives written assurances, to its satisfaction, that: (a) the risk of injury or damage has been minimized; (b) the user assumes all such risks; and (c) potential liability of SUMMIT Microelectronics, Inc. is adequately protected under the circumstances.

Revision 1.0 - This document supersedes all previous versions. Please check the Summit Microelectronics, Inc. web site at
www.summitmicro.com for updates.
 
ADOC™ is a registered trademark of Summit Microelectronics Inc., I2C is a trademark of Philips Corporation.
 

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