Silicon Bipolar Darlington Amplifier

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The ADA-4743 is a general purpose Silicon Bipolar Darlington Amplifier housed in an industry standard SOT-343 (4-lead SC70) package. The device is a current driven amplifier that operates on a single current supply. It also exhibits flat gain, high linearity and unconditional stability.


  • At 900MHz, the ADA-4743 delivers gain of 16.5dB, OIP3 of 32.6dBm and P1dB of 17.1dBm at 60mA/3.8V biasing. Internal input and output 50-ohm matching makes it simple to use with little design efforts, making it an excellent choice for IF, buffer and general purpose amplifiers for the wireless communications market.


Substance Compliance

  • RoHS6
    Fully Compliant
Specification Value
Lifecycle Active
Distrib. Inventory Yes
Cur Bias In Ma (mA) 60.0
Freq Max In Ghz 2.5
Gain Ctgn Moderate
Gain In Db 16.5
RoHS6 Compliant Y
Noise Fig In Db 4.2
Pwr Out In Dbm 17.1
Rev Isltn Db 20.0
Test Bias Current (mA) 60.0
Test Bias Voltage (V) 3.8
Vbias In V 3.8
Vo Max In V 4
Vo Min In V 3.5
Frequency (GHz) DC-2.5
Bias Condition (V@mA) 3.8V@60mA
NF (dB) 4.2
Gain (dB) 16.5
P1dB (dBm) 17.1
OIP3 (dBm) 32.6
Package SOT-343
Vo Min In V 3.5
Vo Max In V 4

ADS Model 1 i
Application Note1 i
Data Sheet1 i
Product Change Notice (PCN)5 i
Reliability Data Sheet1 i
S-Parameter3 i


Demostration Circuit Board for ADA-4543, ADA-4643, ADA-4743