This document describes the known exceptions to the functional and performance specifications to TI CMOS Radar Devices (IWR2243).
To designate the stages in the product development cycle, TI assigns prefixes to the part numbers of Radar / milli-meter Wave sensor devices. Each of the Radar devices has one of the two prefixes: XAx or IWR2x (for example: IWR2243APBGABLRQ1). These prefixes represent evolutionary stages of product development from engineering prototypes (XAx) through fully qualified production devices (IWR2x).
Device development evolutionary flow:
XAx — | Experimental device that is not necessarily representative of the final device's electrical specifications and may not use production assembly flow. |
IWR2x — | Production version of the silicon die that is fully qualified. |
XAx devices are shipped with the following disclaimer:
"Developmental product is intended for internal evaluation purposes."
Texas Instruments recommends that these devices not to be used in any production system as their expected end –use failure rate is still undefined.
Figure 3-1 shows an example of the IWR2243 Radar Device's package symbolization.
This identifying number contains the following information:
ADVISORY NUMBER | ADVISORY TITLE | IWR2243 | |
---|---|---|---|
ES1.0 | ES1.1 | ||
MASTER SUBSYSTEM | |||
MSS#37 | DCC Module Frequency Comparison can Report Erroneous Results | X | X |
ANALOG / MILLIMETER WAVE | |||
ANA#08A | Doppler Spur Observed at Certain RF Frequencies | X | X |
ANA#11 | TX, RX Calibrations Sensitive to Large External Interference | X | X |
ANA#12 | Second Harmonic (HD2) is Present in the Receiver | X | X |
ANA#13 | TX1 to TX3 Phase Mismatch Variation over Temperature is Double that of TX2/TX1 and TX3/TX2 Combinations | X | X |
ANA#18A | Spurs Caused due to Digital Activity Coupling to XTAL | X | X |
ANA#21 | Out of Band Radiated Spectral Emission | X | X |
ANA#22A | Overshoot and Undershoot During Inter-Chirp Idle Time | X | X |
ANA#23 | MIPI CSI2 HS Data TX Differential Voltage Mismatch (Pulse) Marginality | X | X |
ANA#24 | 40-MHz OSC CLKOUT Causing Spurs in 2D FFT Spectrum | X | X |
ANA#25 | High-Speed Data System Coupling to the Clock System | X | X |
ANA#27 | Digital Temperature Sensor Having Higher Error | X | X |
ANA#28 | 20GHz FM_CW_SYNCOUT/CLKOUT to FM_CW_SYNCIN Coupling in Cascade Use Case | X | X |
DCC Module Frequency Comparison can Report Erroneous Results
IWR2243 ES1.0, ES1.1
The Dual-clock Comparator module, which is used to monitor a clock frequency while comparing with a known clock reference, could stop earlier than expected, and, thus, indicating the measured clock frequency to be lower. This is due to a clock domain crossing issue causing the error detection logic to get triggered. This incorrect reporting, can cause a rare failure in the DCC monitor used to monitor internal clock frequencies.
Multiple measurements can be taken for the same clock pairs, and the median of the frequencies reported can be used for detecting failure.