NRF52811-QCAA-R7 datasheet(423/444 Pages) NORDIC

423 / 444 page

Hardware and layout

7.1.4 GPIO pins located near the radio

Radio performance parameters, such as sensitivity, may be affected by high frequency digital I/O with

large sink/source current close to the radio power supply and antenna pins.

GPIO recommended usage on page 423 identifies some GPIO pins that have recommended usage

guidelines for maximizing radio performance in an application.

GPIO

QFN48 pin

QFN32 pin

Recommended usage

P0.25

P0.26

P0.27

P0.28

P0.29

Low drive, low frequency I/O only.

Table 123: GPIO recommended usage

7.2 Mechanical specifications

The mechanical specifications for the packages show the dimensions in millimeters.

7.2.1 QFN48 6 x 6 mm package

Dimensions in millimeters for the nRF52811 QFN48 6 x 6 mm package.

Figure 154: QFN48 6 x 6 mm package

D, E

D2, E2

Min.

0.80

0.00

0.15

4.50

0.20

0.35

Nom.

0.85

0.04

0.20

6.00

4.60

0.40

Max.

0.90

0.05

0.25

4.70

0.45

Table 124: QFN48 dimensions in millimeters

4454_140 v1.0

423

NRF52811-QCAA-R7 Datasheet(PDF) 423 Page - Nordic Semiconductor

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