ML2722 datasheet(5/28 Pages) MICRO-LINEAR

Nome de Peças	ML2722

Descrição Electrónicos	900MHz Low-IF 1.5Mbps FSK Transceiver

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Fabricante Electrônico	MICRO-LINEAR [Micro Linear Corporation]

Página de início	http://www.microlinear.com

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ML2722

DS2722-F-06

FINAL DATASHEET

DECEMBER 2005 5

RECEIVER

ZIN

Receiver RF impedance

fc=915MHz

17-j50

Ω

NF

Receiver RF noise figure

fc=915MHz

9

dB

DRRX

Data Rate

FSK modulation, fdev=+/-460kHz

1.536

Mbps

S

Input Sensitivity

For better than 12.5% CER

-95

dBm

BWRX

Bandwidth

3dB nominal

770

kHz

PIMAX

Maximum RX RF input

<12.5% CER at 1.536Mchip/s

8

dBm

IIP3

Receiver input IP3

Test tones 2 and 4 channels away

-12

dBm

LO Leakage at RXI

-80

dBm

IRR

Receive RF mixer image

rejection

Measured at 3.5MHz offset

35

dB

Adjacent channel rejection

-80dBm wanted signal <12.5% CER

(a single interferer with 2GFSK

modulation to give a

-20dBc bandwidth of 1.5MHz)

1 channel

2 channels

3 or more channels

15

40

45

dB

Receiver settling time

RXON high to valid data

120

μs

IF FILTERS

fIFC

IF filter center frequency

After Automatic Filter Alignment

1.024

MHz

BWIF

IF filter 3dB bandwidth

After Automatic Filter Alignment

1405

kHz

LIMITER, AGC, AND FM DEMODULATOR

tOVLD

Recovery from overload

From 0dBm at input

5

12

μs

Eb/No

For 12.5% CER

3

dB

Co-Channel rejection, 12.5%

CER

-80dBm, modulated with 1.536Mbps

GFSK, BT=0.5, PRBS data

4

dB

AM tolerance for 12.5% or better

CER

-80dBm wanted signal, AM

modulation depth at 100kHz rate

90

%

RSSI PERFORMANCE

tRRSSI

RSSI rise time: < -100dBm to

-15dBm into the IF mixer

20pF load, 20% to 80%

1

5.3

10

μs

tFRSSI

RSSI fall time: <-15dBm to

<-100dBm into the IF mixer

20pF load, 20% to 80%

1

4.4

10

μs

VRSMX

RSSI maximum voltage

-15dBm in

2.2

2.8

V

VRSMN

RSSI minimum voltage

No signal

0.05

V

GRSMID

RSSI sensitivity, mid range

28

35

42

mV/dB

PRSMX

RSSI maximum signal

Sensitivity is >50% mid range

-20

dBm

PRSMN

RSSI minimum signal

Sensitivity is >50% mid range

-95

dBm

RSSI accuracy

Measured at -40dBm input power

1.5

1.9

2.1

V

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