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LMX2572: synthesizer

Part Number: LMX2572

Following up on the -40C cold start issue and getting intermittent lock conditions across channels.

No solution noted in original thread, wondering if TI has further inputs on these operating conditions.

Empirically, we have found extending the delay time from applying power to the LMX and driving CS high beyond the recommended 500uS has helped in some cases.

Is there an app note or errata supplement that defines behavior at cold operating temperatures from a power on state?

Thanks,

Jason