RF2926 Просмотр технического описания (PDF) - RF Micro Devices

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RF2926

UHF DUAL CONVERSION TRANSCEIVER

RF Micro Devices 

RF2926

Pin Function Description

Interface Schematic

46

LVL ADJ This pin is used to vary the transmitter output power. An output level

adjustment range greater than 12dB is provided through analog voltage

control of this pin. DC current of the transmitter power amp is also

reduced with output power. This pin MUST be low when the transmitter

is disabled.

40 kΩ

LVL ADJ

400

4 kΩ

47 PLL ENABL This pin is used to power up or down the VCO and PLL. A logic high

(PLL ENABL>2.0V) powers up the VCO and PLL electronics. A logic

low (PLL ENABL<1.0V) powers down the PLL and VCO.

PLL ENABL

50 kΩ

48 RX ENABL Enable pin for the receiver circuits. RX ENABL>2.0V powers up all

receiver functions. RX ENABL<1.0V turns off all receiver functions

except the PLL functions and the RF mixer.

RX ENABL

50 kΩ

Pin Out

TX ENABL 1

48 47 46 45 44 43 42 41 40 39 38 37

Gain

Control

36 LO-

TX OUT 2

35 VCO OUT

GND2 3

34 MODIN

RX IN 4

33 GND4

GND1 5

32 VCC2

LNA GND 6

31 RESNTR-

LNA GND 7

30 RESNTR+

LNA OUT 8

29 VCC4

GND3 9

28 DEMOD IN

MIX IN 10

RSSI

27 DATA REF

GND5 11

26 FM OUT

MIX OUT+ 12

25 RSSI

13 14 15 16 17 18 19 20 21 22 23 24

11

Rev A5 010404

11-191

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