Freescale Semiconductor Errata Document Number: SGTL5000ER Rev. 2.0, 6/2013 SGTL5000 Silicon Errata Introduction Device Revision Identification This errata document applies to the following devices: Table 1. Silicon Revision Part Number Package Silicon Revision SGTL5000XNLA3 20QFN 3x3 ALL SGTL5000XNAA3 32QFN 5x5 ALL SGTL5000XNLA3R2 20QFN 3x3 ALL SGTL5000XNAA3R2 32QFN 5x5 ALL General Description This errata document applies to SGTL5000 series. Table 2. Definitions of Errata Severity Errata Level Meaning High Failure mode that severely inhibits the use of the device for all or a majority of intended applications. Medium Failure mode that might restrict or limit the use of the device for all or a majority of intended applications. Low Unexpected behavior that does not cause significant problems for the intended applications of the device. Enhancement Improvement made to the device due to previously found issues on the design. © Freescale Semiconductor, Inc., 2012. All rights reserved. Table 3. Errata for the SGTL5000 Errata No. Erratum System Impact Description Medium Severity Internal VDDD regulator does not Cannot communicate with IC. start up Issue: On some very rare combinations of parts and application boards, and on a very small percentage of those rare part/board combinations, sometimes the VDDD internal regulator does not start up after IC power-up. This can occur at any VDDIO and VDDA voltage level, and on either the QFN20 or QFN32 part. The failure is a function of board design and the slew rates of the power supplies, VDDIO and VDDA. The failure does not occur if an external regulator is used to supply VDDD. Result: The most noticeable symptom is that no IC communication/control occurs, and that the I2C bus lines are held in a low state. Power must be cycled to attempt another power-up, and to attempt to regain IC communication. Note that the same applies for SPI communication. ER1 Workarounds: New Designs Use an external supply in the system or a separate regulator to supply VDDD. This VDDD supply must be between 1.1 V and 2.0 V, and must source at least 11 mA of current. A 0.1 F cap should also be added from VDDD to ground when VDDD is supplied externally. In order to save power, the LINREG_D_POWERUP, LINREG_SIMPLE_POWERUP, and STARTUP_POWERUP bits in register 0x0030/CHIP_ANA_POWER should be cleared after IC power-up, and after the application of the external VDDD voltage. If power savings is not a concern, this software change is not required. The preferred supply sequencing is VDDIO/VDDA (it does not matter which comes first) and then VDDD. Existing Designs For existing designs, if you have not experienced the issue to date, you likely will not. As stated previously, the issue requires the right combination of application board and part, and the right combination is very rare. If you are not planning a new board design, you can decrease the likelihood of seeing the issue by ramping both VDDIO and VDDA up in less than 1.0 ms. If VDDIO and VDDA are separate supplies, ramp VDDIO up first. Any “soft-start” supply mechanisms for VDDIO/VDDA should be disabled, and any large caps on VDDIO/VDDA that are not absolutely necessary should be removed, as long as there is no adverse effect on product performance. If a new board pass is planned, follow the steps in the “New Designs” section and use an external VDDD, as the external VDDD fix is the only solution that is guaranteed to solve the issue 100% of the time. Note that the potential failure rate of an existing design in the field cannot be determined. Fix Plan/Status: No fix scheduled. SGTL5000ER 2 Freescale Semiconductor Revision History Revision Date 1.0 10/2012 • Initial release 2.0 6/2013 • Better clarified the erratum ER1 Freescale Semiconductor Description SGTL5000ER 3 How to Reach Us: Information in this document is provided solely to enable system and software implementers to use Freescale products. Home Page: freescale.com There are no express or implied copyright licenses granted hereunder to design or fabricate any integrated circuits based Web Support: freescale.com/support Freescale reserves the right to make changes without further notice to any products herein. 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