5-54
RF2850
Rev A0 050616
Pin
Function
Description
Interface Schematic
1GND
Ground connection.
2LO
LO input signal. This pin has an internal DC-blocking capacitor. This
port is voltage-driven so matching at different frequencies is generally
not required.
3LOREF
The reference end of local oscillator.
4GND
Ground connection.
5VCC
Power supply. An external capacitor is required.
6I REF
Reference voltage for the I mixer. The DC voltage should be the same
as the DC supplied to I SIG (pin 7). See pin 7 for more information.
The SIG and REF inputs are inputs of a differential amplifier. Therefore,
the REF and SIG inputs are interchangeable. If swapping the I SIG and
I REF pins, the Q SIG and Q REF also need to be swapped to maintain
the correct phase. It is also possible to drive the SIG and REF inputs in
a differential mode which will increase gain.
7I SIG
Baseband input to the I mixer. This pin is DC-coupled. The input drive
level determines output power and linearity performance. For better
carrier/sideband suppression and dynamic range, the drive level
should be as high as possible to meet the required linearity perfor-
mance. The recommended DC level for this pin is 2.05V.
8GND
Ground connection.
9RFREF
The reference end of RF input.
10
VCC
Power supply. An external capacitor is required.
11
GND
Ground connection.
12
RF OUT
RF Output. This pin has an internal DC-blocking capacitor. At some fre-
quencies, external matching may be needed to optimize output power.
13
GND
Ground connection.
14
Q SIG
Baseband input to the Q mixer. This pin is DC-coupled. The input drive
level determines the output power and linearity performance. For better
carrier/sideband suppression and dynamic range, the drive level
should be as high as possible to meet the required linearity perfor-
mance. The recommended DC level for this pin is 2.05V.
15
Q REF
Reference voltage for the Q mixer. See pin 14 for more information.
16
VCC
Power supply. An external capacitor is required.
Pkg
Base
GND
Ground connection.
LO
2 pF
V
CC
2 pF
V
CC
RF OUT
2 pF
V
CC
2 pF
V
CC
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
