ADA-4743 Datasheet, PDF (1/9 Pages) Agilent(Hewlett-Packard) – Silicon Bipolar Darlington Amplifier

ADA-4743
Silicon Bipolar Darlington Amplifier
Data Sheet
Description
Avago Technologies’ ADA-4743 is an economical, easy-to-
use, general purpose silicon bipolar RFIC gain block am-
plifiers housed in a 4-lead SC-70 (SOT-343) surface mount
plastic package which requires only half the board space
of a SOT-143 package.
The Darlington feedback structure provides inherent
broad bandwidth performance, resulting in useful oper-
ating frequency up to 2.5 GHz. This is an ideal device for
small-signal gain cascades or IF amplification.
ADA-4743 is fabricated using Avago’s HP25 silicon bi-
polar process, which employs a double-diffused single
polysilicon process with self-aligned submicron emitter
geometry. The process is capable of simultaneous high fT
and high NPN breakdown (25 GHz fT at 6V BVCEO). The
process utilizes industry standard device oxide isolation
technologies and submicron aluminum multilayer inter-
connect to achieve superior performance, high uniformi-
ty, and proven reliability.
SOT-343 Surface Mount Package
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: 40 to 80 mA
• Industry standard SOT-343 package
• Lead-free option available
Specifications
900 MHz, 3.8V, 60 mA (typ.)
• 16.5 dB associated gain
• 17.1 dBm P_1dB
• 32.6 dBm OIP₃
• 4.2 dB noise figure
• VSWR < 2 throughput operating frequency
• Single supply, typical I_d = 60 mA
Pin Connections and Package Marking
RFout
& Vd
GND
GND
RFin
Applications
• Cellular/PCS/WLL base stations
• Wireless data/WLAN
• Fiber-optic systems
• ISM
Attention:
Observe precautions for handling
electrostatic sensitive devices.
ESD Machine Model (Class A)
ESD Human Body Model (Class 1B)
Refer to Avago Application Note A004R:
Electrostatic Discharge Damage and Control.
Note:
Top View. Package marking provides orientation and identification.
“3T” = Device Code
“x” = Date code character
identifies month of manufacture.
Typical Biasing Configuration
Rc =
Vcc -
Id
Vd
V_CC = 5 V
R_c
C _bypass
RF
3Tx
input
C _block
RFC
V_d = 3.8 V
C _block
RF
output