RF2609 RF Micro Devices, RF2609 Datasheet - Page 3

• Manufacturer Part Number: RF2609
• Description: CDMA/FM TRANSMIT AGC AMPLIFIER
• Manufacturer: RF Micro Devices

Rev B3 000822
Pin
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
Function
CDMA+
CDMA-
OUT+
GND
GND
GND
GND
GND
OUT-
GND
GND
VCC
VCC
VCC
GC
NC
Description
CDMA Balanced Input Pin. This pin is internally DC biased and should
be DC blocked if connected to a device with a DC level, other than V
present. A DC to connection to V
input operation, one pin is used as an input and the other CDMA input
is AC coupled to ground. The balanced input impedance is 1k , while
the single-ended input impedance is 500 .
Same as pin 2, except complementary input.
Ground connection. Keep traces physically short and connect immedi-
ately to ground plane for best performance.
Same as pin 3.
Same as pin 3.
Same as pin 3.
Same as pin 3.
No Connection pin. This pin is internally biased and should not be con-
nected to any external circuitry, including ground or V
Balanced Output pin. This is an open-collector output, designed to
operate into a 500
ance, but an external choke or matching inductor to V
supplied in order to correctly bias this output. This bias inductor is typi-
cally incorporated in the matching network between the output and next
stage. Because this pin is biased to V
be used if the next stage’s input has a DC path to ground.
Same as pin 9, except complementary output.
Same as pin 3.
Same as pin 3.
Supply Voltage pin. External bypassing is required. The trace length
between the pin and the bypass capacitors should be minimized. The
ground side of the bypass capacitors should connect immediately to
ground plane. Pins 13, 14, and 15 may share one bypass capacitor if
trace lengths are kept minimal.
Same as pin 13.
Same as pin 13.
Analog gain adjustment for all amplifiers. Valid control ranges are from
0V to 3.0V. Maximum gain is selected with 3.0V. Minimum gain is
selected with 0V. These voltages are valid only for a 3.3k
impedance.
balanced load. The load sets the operating imped-
CC
is acceptable. For single-ended
CC
, a DC blocking capacitor must
CC
CC
.
must also be
DC source
CC
,
Interface Schematic
See pin 1 schematic.
See pin 9 schematic.
CDMA+
OUT+
RF2609
580
23.5 k
V
CC
V
CC
12.7 k
15 k
OUT-
580
CDMA-
10-11
10