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50 MHz to 6 GHz
RF/IF Gain Blocks
Preliminary Technical Data
ADL5541/ADL5542
Rev. PrD 5/07
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FEATURES
Fixed gain of 15 dB ADL5541
Fixed gain of 20 dB ADL5542
Operation up to 6 GHz
40.9 dBm Output Third-Order Intercept at 900 MHz ADL5541
40 dBm Output Third-Order Intercept at 900 MHz ADL5542
3.5 dB noise figure at 900 MHz ADL5541
3.0 dB noise figure at 900 MHz ADL5542
Input/output internally matched to 50 Ω
Stable vs. temperature and power supply
5 V power supply
92 mA power supply current
1000 V ESD (Class 1C)
FUNCTIONAL BLOCK DIAGRAM
ADL5541/2
5 VPOS
GND 2
RFIN 1
8RFOUT
GND 3
CB 4
6 GND
7 GND
15/20 dB
Figure 1.
GENERAL DESCRIPTION
The ADL5541 and ADL5542 are broadband 15 dB and 20 dB
linear amplifiers respectively that operate at frequencies up to 6
GHz. The devices can be used in a wide variety of wired and
wireless devices including cellular, GSM and WCDMA, and
broadband applications.
The ADL5541 provides a gain of 15 dB, which is stable over
frequency, temperature, power supply, and from device to
device. It achieves an OIP3 of 40.9 dBm with an output
compression point of 18.2 dBm and a noise figure of 3.5 dB at
900 MHz.
The ADL5542 provides a gain of 20 dB. It achieves an OIP3 of
40 dBm with an output compression point of 20.6 dBm and a
noise figure of 3.0 dB at 900 MHz.
Both amplifiers are internally matched to 50 Ω with an input
return loss of 10 dB or better up to 6 GHz. Only input/output
ac-coupling capacitors, power supply decoupling capacitors,
and an external inductor are required for operation.
The devices operate with a supply voltage of 5 V with a supply
current of 92 mA.
The ADL5541 and ADL5542 are fabricated on an InGaP HBT
process and have an ESD rating of 1000 V (Class 1C). The devices
are packaged in a 3 mm × 3 mm LFCSP that uses an exposed
paddle for excellent thermal impedance. They operate from
40°C to +85°C. A fully populated evaluation board is available.