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TH71111

868/915MHz FSK/FM/ASK Receiver

Melexis Microelectronic Systems  

TH71111

868/915MHz

FSK/FM/ASK Receiver

3.5 AC System Characteristics

all parameters under normal operating conditions, unless otherwise stated;

typical values at TA = 23 °C and VCC = 3 V,

RF at 868.3 MHz; SAW frond-end filter loss and IF at 10.7 MHz;

all parameters based on test circuits as shown in Fig. 2, Fig.3 and Fig. 5

Parameter

Symbol

Condition

Min

Receive Characteristics

Input sensitivity – FSK

(standard)

Input sensitivity – FSK

(narrow band)

Input sensitivity – ASK

Maximum input signal – FSK/FM

Maximum input signal – ASK

Spurious emission

Image rejection

Start-up Parameters

Pmin, ST

Pmin, NB

Pmin, ASK

Pmax, FSK

Pmax, ASK

Pspur

ΔPimag

BIF = 180kHz,

Δf = ±20kHz,

4kbps NRZ,

BER ≤ 3⋅10-3, 6)

BIF = 30kHz,

Δf = ±5kHz,

4kbps NRZ,

BER ≤ 3⋅10-3, 6)

BIF = 180kHz,

4kbps NRZ,

BER ≤ 3⋅10-3, 6)

BER ≤ 3⋅10-3

GAIN_LNA = 1

BER ≤ 3⋅10-3

GAIN_LNA = 1

Crystal start-up time

Receiver start-up time

TXTL ENRX from 0 to 1

TRX ENRX from 0 to 1,

depends on data slicer

time constant,

valid data at output

PLL Parameters

VCO gain

KVCO

Charge pump current

ICP

6) incl. 3 dB loss of front-end SAW filter

Typ Max Unit

-103

dBm

-105

dBm

-109

dBm

0

dBm

-10

dBm

-70

dBm

45

dB

0.9

ms

TXTL

+

R4 · C17

350

MHz/V

60

µA

39010 71111

Rev. 013

Page 11 of 22

Data Sheet

June/07

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