LTC2162 datasheet(9/16 Pages) LINER

9 / 16 page

LTC6431-15

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.

VCC (Pins 9, 22): Positive Power Supply. Either VCC pin

should be connected to the 5V supply. Bypass the VCC 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

floatthesepinsmayimpairoperationoftheLTC6431-15.

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

VCC

9, 22

BIAS AND TEMPERATURE

COMPENSATION

OUT

T_DIODE

GND

8, 17, 23, 25 (EXPOSED PAD)

15dB

GAIN

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