MRF49XAT-I/ST【PDF 81/102 页】IC RF TXRX 433/868/915 16-TSSOP

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MRF49XA

TABLE 5-4:

RECEIVER AC CHARACTERISTICS (1)

433 MHz band

868 MHz band

915 MHz band

Parameters

Receiver Sensitivity

Maximum RF Input

Condition

(2)

(2)

(2)

LNA: High Gain

Min

—

—

—

0

Typ

-112

-110

-109

—

Max

—

—

—

—

Unit

dBm

dBm

dBm

dBm

Power

RF Input Capacitance

Receiver Spurious

—

—

—

—

1

—

—

-60

pF

dBm

Emission

Receiver BW

RSSI Range

RSSI Error

RSSI Power Supply

mode 0

Mode 1

Mode 2

Mode 3

Mode 4

Mode 5

—

—

When input signal level is lower than

—

—

—

—

—

—

—

—

—

67

134

200

270

340

400

46

±6

+35

—

—

—

—

—

—

—

—

—

kHz

kHz

kHz

kHz

kHz

kHz

dB

dB

mV/V

Dependency

-54 dBm and greater than -100 dBm

Filter Capacitor for

—

1

—

—

nF

Analog RSSI

RSSI Programmable

—

—

6

—

dB

Level Steps

Digital RSSI

Response Time

Until the RSSI signal goes high after

the input signal exceeds the

—

500

—

μ s

preprogrammed limit, CARRSI = 4.7

nF

Input IP3

In band interferers in high bands (868

—

-21

—

dBm

MHz, 915 MHz)

IIP3

In band interferers in low band (433

—

-15

—

dBm

(LNA – 6 dB gain)

MHz)

IIP3

Out of band interferers,

—

-12

—

dBm

(LNA – 6 dB gain)

l f-f O l > 4 MHz

FSK Bit Rate

With internal digital filters supported

0.6

—

115.2

kbps

by design

FSK Bit Rate

With internal analog filters supported

—

—

256

kbps

by design

AFC Locking Range

Δ f fsk : FSK deviation in the received

signal

—

0.8 – Δ f fsk

—

—

Note 1:

2:

Typical Values: T A = 25°C, V DD = 3.3V.

BER = 10E – 3, BW = 67 kHz, Δ f = 30 kHz, Baud Rate = 1.2 kbps, digital filter with AFC disabled.

? 2009-2011 Microchip Technology Inc.

Preliminary

DS70590C-page 81

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