Datasheet

LTC6431-15
9
643115f
block DiagraM
pin FuncTions
GND (Pins 8, 17, 23, Exposed Pad Pin 25): Ground. For
best RF performance, all ground pins should be connected
to the printed circuit board ground plane. The exposed pad
should have multiple via holes to an underlying ground
plane for low inductance and good thermal dissipation.
IN (Pin 24): Signal Input Pin. This pin has an internally
generated 2V DC bias. A DC blocking capacitor is required.
See the Applications Information section for specific
recommendations.
V
CC
(Pins 9, 22): Positive Power Supply. Either V
CC
pin
should be connected to the 5V supply. Bypass the V
CC
pin
with 1000pF and 0.1µF capacitors. The 1000pF capacitor
should be physically close to Pin 22.
OUT (Pin 18): Amplifier Output Pin. A choke inductor is
necessary to provide power from the 5V supply and to
provide RF isolation. For best performance select a choke
with low loss and high self-resonant frequency (SRF). A
DC blocking capacitor is also required. See the Applica-
tions Information section for specific recommendations.
DNC (Pins 1 to 7, 10 to 15, 19 to 21): Do Not Connect.
Do not connect these pins; allow them to float. Failure to
float these pins may impair operation of the LTC6431-15.
T_DIODE (Pin 16): Optional Diode. The T_DIODE can be
forward-biased to ground with 1mA of current. The meas-
ured voltage will be an indicator of chip temperature.
643115 BD
V
CC
9, 22
IN
BIAS AND TEMPERATURE
COMPENSATION
24
OUT
T_DIODE
18
16
GND
8, 17, 23, 25 (EXPOSED PAD)
15dB
GAIN