RF2494 RF Micro Devices, RF2494 Datasheet - Page 4

• Manufacturer Part Number: RF2494
• Description: HIGH FREQUENCY LNA/MIXER
• Manufacturer: RF Micro Devices

8
8-56
Pin
13
14
15
16
RF2494
LNA OUT
Function
LNA IN
VCC4
GS
Description
RF signal output for external 50
optional but does provide for lower noise floor and better out-of-band
rejection.
Supply voltage for the LNA. This pin should be bypassed with a 10 pF
capacitor to ground as close to the pin as possible. The shunt induc-
tance from this pin to ground via the supply decoupling must be tuned
to match the LNA output to 50
LNA gain control. When GAIN SEL is >V
dB. When GAIN SEL is <300mV, the LNA gain is -6dB.
This pin is NOT internally DC blocked. An external blocking capacitor
must be provided if the pin is connected to a device with DC present. If
a blocking capacitor is required, a value of 2pF is recommended.
at the desired operating frequency.
filtering.The use of a filter here is
CC
- 300mV, LNA gain is at 10
Interface Schematic
See pin 14.
See pin 14.
See pin 14.
LNA IN
P2
BIAS
Preliminary
VCC4
Microstrip
GAIN SEL
Rev A0 010730
-16 dB
P1
DECOUPLING
EXTERNAL
LNA OUT
P15