MRF49XA-ISLASHT datasheet(81/102 Pages) MICROCHIP

81 / 102 page

Preliminary

DS70590C-page 81

MRF49XA

Note 1: Typical Values: TA = 25°C, VDD = 3.3V.

2: BER = 10E – 3, BW = 67 kHz,

Δf = 30 kHz, Baud Rate = 1.2 kbps, digital filter with AFC disabled.

TABLE 5-4:

RECEIVER AC CHARACTERISTICS(1)

Parameters

Condition

Min

Typ

Max

Unit

Receiver Sensitivity

433 MHz band(2)

—-112—

dBm

868 MHz band(2)

—-110—

dBm

915 MHz band(2)

—

-109

—

dBm

Maximum RF Input

Power

LNA: High Gain

—

dBm

RF Input Capacitance

—

Receiver Spurious

Emission

——

—

-60

dBm

Receiver BW

mode 0

—

kHz

Mode 1

—

134

—

kHz

Mode 2

—

200

—

kHz

Mode 3

—

270

—

kHz

Mode 4

—

340

—

kHz

Mode 5

—

400

—

kHz

RSSI Range

—

RSSI Error

—

±6

—

RSSI Power Supply

Dependency

When input signal level is lower than

-54 dBm and greater than -100 dBm

—+35

—

mV/V

Filter Capacitor for

Analog RSSI

—1

—

RSSI Programmable

Level Steps

——

—

Digital RSSI

Response Time

Until the RSSI signal goes high after

the input signal exceeds the

preprogrammed limit, CARRSI = 4.7

—

500

—

μs

Input IP3

In band interferers in high bands (868

MHz, 915 MHz)

—-21

—

dBm

IIP3

(LNA – 6 dB gain)

In band interferers in low band (433

MHz)

—-15

—

dBm

IIP3

(LNA – 6 dB gain)

Out of band interferers,

l f-fO l > 4 MHz

—-12

—

dBm

FSK Bit Rate

With internal digital filters supported

by design

0.6

—

115.2

kbps

FSK Bit Rate

With internal analog filters supported

by design

——

256

kbps

AFC Locking Range

Δffsk: FSK deviation in the received

signal

—

0.8 –

Δffsk

——

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