RF112 datasheet(20/45 Pages) NXP

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Table 4. Receiver specification (continued)

Parameter

Conditions

Min

Typ

Max

Unit

Resolution of RX

DC offset comp. at

output

Maximum

baseband gain

± 5

DC offset at output

after calibration

Maximum gain

Measurement

bandwidth ≤ 10 kHz

-50

Rx image rejection

ratio

Uncalibrated

RSSI

RSSI thresholds

referred to the 1dB compression point (CP1dB)

High threshold

-6

dBc

Middle threshold

-15

dBc

Low threshold

-24

dBc

RSSI accuracy

+/-3.2

RSSI sample rate

Configurable

10/20

MSps

General

EVM degradation

due to Rx spurious

signal

Degradation

compared to

neighboring

channel.

RF level chosen to

give -30dB EVM

with maximum gain

for neighboring

channel.

40 MHz channel

bandwidth.

Rx RF pin isolation See Table 6

3.4 Transmitter specification

The transmitter consists of a high band and a low band RF chain with shared baseband

reconstruction filter, see figure below.

A fifth order Butterworth reconstruction filter suppresses the DAC alias signals, the filter

bandwidth needs to be calibrated by the baseband chip. The baseband signal is then up-

converted and amplified. The LO leakage depends on the DC offset and needs to be

minimized by DC offset compensation of the digital signal in the baseband. The TX gain

can be adjusted at several places and most of the gain control is done at RF to ensure that

the LO leakage remains low for all output power levels.

Electrical characteristics

RF112 Transceiver Data Sheet, Rev. 1 Draft B, 05/2024

NXP Semiconductors

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