NRF51822-CFAB-R datasheet(55/130 Pages) NORDIC

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Page 55

nRF51822 Product Specification v3.3

8.5.6

Radio timing parameters

Table 40 Radio timing

8.5.7

Antenna matching network requirements

Table 41 Optimum differential load impedance

8.6

Received Signal Strength Indicator (RSSI) specifications

Table 42 RSSI specifications

Symbol

Description

250 k

1 M

2 M

BLE

Jitter

Units

tTXEN

Time between TXEN task and READY event.

132

140

μs

tTXDISABLE

Time between DISABLE task and DISABLED

event when the radio was in TX.

μs

tRXEN

Time between the RXEN task and READY event.

130

138

μs

tRXDISABLE

Time between DISABLE task and DISABLED

event when the radio was in RX.

μs

tTXCHAIN

TX chain delay.

0.5

μs

tRXCHAIN

RX chain delay.

12.5

μs

Symbol

Description

Min.

Typ.

Max.

Units

Test

level

ZQFN48,ANT1,2

Optimum differential impedance at 2.4 GHz seen

into the matching network from pin ANT1 and

ANT2 on the QFN48 packet.

15 + j85

ZWLCSP,ANT1,2

Optimum differential impedance at 2.4 GHz seen

into the matching network from pin ANT1 and

ANT2 on the WLCSP packet.

12.6 + j106

Symbol

Description

Note

Min.

Typ.

Max.

Units

Test

level

RSSIACC

RSSI accuracy.

Valid range

-50 dBm to -80 dBm.

±6

RSSIRESOLUTION

RSSI resolution.

RSSIPERIOD

Sample period.

8.8

μs

RSSICURRENT

Current consumption in

addition to IRX.

250

μA

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