Datasheet ADIS16203 (Analog Devices)

Programmable 360° Inclinometer Silicon Anomaly ADIS16203 ADIS16203 ANOMALIES
This anomaly list describes the known bugs, anomalies, and workarounds for the ADIS16203. Analog Devices, Inc., is committed, through future silicon revisions, to continuously improve silicon functionality. Analog Devices tries to ensure that these future silicon revisions remain compatible with your present software/systems by implementing the recommended workarounds outlined here.
ANOMALY STATUS Reference Number Description Status
er001 Manual Flash®/EE memory update failures Fixed er002 ALM_SMPL1/ALM_SMPL2 write causes device failure Fixed er003 Invalid orientation bit not active No fix
MANUAL FLASH/EE MEMORY UPDATE FAILURES [er001] Background
The ADIS16203 uses a dual memory structure to maintain its operational configuration. The RAM register structure controls the operation of the device, and the Flash/EE memory contents determine what is loaded into the RAM at startup and during reset recovery events. The Flash/EE memory is updated by using a control bit in the COMMAND register of this part.
Issue
Flash/EE memory update fails at a rate of approximately 5%.
Workaround
Date Code 0722 and older can exhibit this behavior. Verification: Check lower four bits of Address 0x52. If > 3, then the update is validated. If the updates cannot be verified using the above criteria, the STATUS register’s Flash Memory error flag can be used to check for this condition. If the error flag indicates a failure, perform another Flash/EE update (COMMAND register) and then verify using the STATUS register again. Given the lower failure rate, two attempts should be sufficient.
Related Issues
None.
ALM_SMPL1/ALM_SMPL2 WRITE CAUSES DEVICE FAILURE [er002] Background
The ALM_SMPL1 and ALM_SMPL2 registers provide critical timing configuration data for rate-of-change alarm settings, which are limited to the lower byte of each register. The upper bytes of these registers are documented as not used.
Issue
Writing to the upper byte of these registers causes a device failure.
Workaround
Date Code 0805 and older can exhibit this behavior. Verification: Check lower four bits of Address 0x52. If > 4, then the update is validated. If the updates cannot be verified using the above criteria, do not write to Address 0x25 and Address 0x27. If they are accidentally written to, then a power cycle or reset is required to restore normal operation.
Related Issues
None.
INVALID ORIENTATION BIT NOT ACTIVE [er003] Background
In the ADIS16203 data sheet, Revision 0, Table 19 describes Bit 6 in the STATUS register as an error flag for invalid orientation. The original purpose of this function was to validate the vertical position of the ADIS16203. The ADIS16203 accuracy specifications are dependent on vertical alignment.
Issue
This function is not supported in the current device configuration.
Workaround
Do not use this function in the ADIS16203. The next generation product in this family (ADIS16209) will provide the necessary features to support vertical alignment verification.
Related Issues
None.
Rev. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 www.analog.com Trademarks and registered trademarks are the property of their respective owners. Fax: 781.461.3113 ©2008 Analog Devices, Inc. All rights reserved.
Document Outline ADIS16203 ANOMALIES ANOMALY STATUS MANUAL FLASH/EE MEMORY UPDATE FAILURES [er001] ALM_SMPL1/ALM_SMPL2 WRITE CAUSES DEVICE FAILURE [er002] INVALID ORIENTATION BIT NOT ACTIVE [er003]