RF6509 Datasheet, PDF (5/12 Pages) RF Micro Devices – 2.7V TO 3.6V MODULE FOR INTEGRATION WITH 900MHz SMART ENERGY AMI

RF6509
Pin Function Description
1
GND
Ground.
2
RX Filter ^{RF output to enter the Rx filter (if used), 50 nominal impedance.}
Input
3
V2S2
Logic input to the Tx Switch arm 2 , selects/deselects thru path if Logic high/low respectively, see truth table.
4
V1S2
Logic input to the Tx Switch arm 1, selects/deselects Low Noise Amplifier if Logic high/low respectively, see
truth table.
5
GND
Ground.
6
ANT
RF output to Antenna for the Tx/thru path and RF input from Antenna for the Rx/thru path, 50 nominal imped-
ance.
7
GND
Ground.
8
V3S2
Logic input to the Tx Switch arm 3, selects/deselects PA if Logic high/low respectively, see truth table.
9
NC
Not connected.
10
GND
Ground.
11
PA VCC2 ^{Collector power supply for Power Amplifier. Nominal 3.6V.}
12
GND
Ground.
13
NC
Not connected.
14
PA BIAS ^{Power supply for the PA Bias Network. Nominal 3.6V.}
15
GND
Ground.
16
PA VREG ^{Voltage set to PA Bias Level. Nomial 2.85V.}
17
PA VCC1 ^{Collector power supply for PA driver stage. Nominal 3.6V.}
18
NC
Not connected.
19
NC
Not connected.
20
PA IN
RF Input to the PA, 50 nominal impedance, needs to be connected externally to PA IN to SWITCH PIN through
as short as possible 50 transmission line.
21
PA IN to ^{PA input to be connected to the Rx Switch through this pin, 50 nominal Impedance.}
SWITCH
22
V2S1
Logic input to the Rx switch arm 2, selects/deselects Thru path if Logic high/low respectively, see truth table.
23
V1S1
Logic input to the Rx switch arm 1, selects/deselects PA if Logic high/low respectively, see truth table.
24
GND
Ground.
25 RX OUT/TX IN ^{Transceiver IN/OUT.}
26
GND
Ground.
27
V3S1
Logic input to the Rx switch arm 3, selects/deselects LNA if Logic high/low respectively, see truth table.
28
NC
Not connected.
29
LNA VCC ^{Collector power cupply for LNA. Nominal 3.0V.}
30
LNA VSEL ^{A logic low selects the high gain mode of the LNA, logic high selects the low gain mode.}
31
LNA VREF ^{Voltage to set the bias of the LNA, nominal 3.0V, can be adjusted to shut the LNA off or set the quiescent current}
of the LNA to desired level.
32
LNA IN
RF input to LNA, nominal impedance 50, the Rx filter output should be connected to this pin, If Rx filter is
bypassed, pin 2 should be connected to this pin htough an external 50 transmission line as short as possible.
DS121128
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
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