Description
ADA-4643 Silicon Bipolar Darlington Amplifier Data Sheet .
Avago Technologies’ ADA-4643 is an economical, easy-touse, general purpose silicon bipolar RFIC gain block amplifiers housed in a 4-lead SC-70 (SOT-34.
Features
* Small Signal gain amplifier
* Operating frequency DC
* 2.5 GHz
* Unconditionally stable
* 50 Ohms input & output
* Flat, Broadband Frequency Response up to 1 GHz
* Operating Current: 20 to 60 mA
* Industry standard SOT-343 package
* Lead-fre
Applications
* Cellular/PCS/WLL base stations
* Wireless data/WLAN
* Fiber-optic systems
* ISM
Typical Biasing Configuration
Rc
=
Vcc
* Id
Vd
VCC = 5 V Rc Cbypass
RFout & Vd
GND
2Tx
GND RFin
RF input
Cblock
2Tx
RFC Cblock
Vd = 3.5 V
RF output
Note: Top View. Packag