ADL5571-EVALZ AD [Analog Devices], ADL5571-EVALZ Datasheet - Page 13
![no-image](/images/no-image-200.jpg)
ADL5571-EVALZ
Manufacturer Part Number
ADL5571-EVALZ
Description
2.5 GHz to 2.7 GHz WiMAX Power Amplifier
Manufacturer
AD [Analog Devices]
Datasheet
1.ADL5571-EVALZ.pdf
(16 pages)
EVALUATION BOARD
The ADL5571 performance data was taken on a FR4 board
layout. Care should be taken to ensure 50 Ω impedance for
all RF traces. For optimal performance in linearity, gain, and
efficiency, the output matching capacitor, C3, should be placed
35 mils from the edge of the package.
Table 6. Evaluation Board Configuration Options
Component
VPOS, VPOS1, GND
TP1 (STBY/PWDN)
TP2 (VREG)
L3
C3, C4
C2, C10
C7, C8, C9, C11, C12
L1, C6, L2, C5
RFIN, RFOUT
Figure 25. Evaluation Board Top Layer
Function
Supply and Ground Connections.
Transmit/Standby Mode. When STBY is low (0 V), the device operates in transmit mode.
When the radio is receiving data, STBY can be taken high (2.5 V), reducing the supply
current to 9 mA.
Normal/Sleep Mode. When VREG is low, the device goes into sleep mode, reducing
the supply current to 10 μA. When VREG is high (2.85 V), the device operates in its
normal transmit mode and the VREG pin draws a bias current of approximately 9 mA.
Input Interface. L3 matches the input to 50 Ω.
Output Interface. C4 provides dc blocking. C3 matches the output to 50 Ω.
Filter Interface. A ground-referenced capacitor should be connected to this node to
reduce bias line noise.
Power Supply Decoupling. Capacitors C7 through C12 are used for power supply
decoupling. They should be placed as close as possible to the DUT.
RF Trap. L1, C6 and L2, C5 form tank circuits and prevent RF from propagating on
the dc supply lines
RF Input and Output SMA Connections.
Rev. 0 | Page 13 of 16
Figure 26. Evaluation Board Bottom Layer
Default Value
W1 = installed
Not applicable
Not applicable
L3 = 2.7 nH (Size 0402)
C3 = 2.7 pF (Size 0402)
(C3 value for 2.5 GHz to
2.7 GHz operation, tight
tolerance recommended)
C4 = 39 pF (Size 0402)
C2 = 2.2 pF (Size 0402)
C10 = 0.01 μF (Size 0402)
C7 = 0.01 μF (Size 0402)
C8 = 0.01 μF (Size 0402)
C9 = 0.01 μF (Size 0402)
C11 = 1 μF (Size 0402)
C12 = 1 μF (Size 0402)
L1 = 1 nH (Size 0402)
C6 = 3.3 pF (Size 0402)
L2 = 11 nH (Size 0402)
C5 = Open
ADL5571