NRF7002-QFAA-R7 datasheet(13/61 Pages) NORDIC

No. de pieza	NRF7002-QFAA-R7

Descripción Electrónicos	nRF7002

PDF	61 Pages

Scroll/Zoom	100%

Fabricante Electrónico	NORDIC [Nordic Semiconductor]

Página de inicio	https://www.nordicsemi.com/

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13 / 61 page

Power and clock management

over temperature. The crystal tolerance (that is, accuracy at room temperature) is less important since this

will be trimmed out by the crystal oscillator trim function (up to ± 20 ppm). The crystal oscillator/crystal is

typically trimmed by transmitting Wi-Fi packets through the antenna connector and using a Vector Signal

Analyzer (VSA) to measure the frequency offset. Alternatively, a generic spectrum analyser can be used to

measure the frequency offset on a transmitted Carrier Wave (CW).

The RTC is automatically calibrated against the trimmed 40 MHz crystal oscillator reference at runtime,

and as such nothing needs to be done on the production line. During sleep, the RTC clocked wakeup

timer is used to time wakeup intervals (since the last Delivery Traffic Indication Message (DTIM) beacon in

regular Wi-Fi Power Save), and as such any residual inaccuracy is not accumulated.

4486_184 v1.0

NRF7002-QFAA-R7 Datasheet(PDF) 13 Page - Nordic Semiconductor