adl5562 Analog Devices, Inc., adl5562 Datasheet - Page 20

• Manufacturer Part Number: adl5562
• Description: 3.3 Ghz Ultralow Distortion Rf/if Differential Amplifier
• Manufacturer: Analog Devices, Inc.

ADL5562
Table 14. Evaluation Board Configuration Options
Component
VPOS, GND
C3, C4, C5,
C6, C7, C11
J1, R1, R2, R3,
R4, R5, R6,
C1, C2, C12
J3, R7, R8, R9,
R10, R11, C9,
C10, C13
ENBL, P1, C8
Figure 44. Layout of Evaluation Board, Component Side
Description
Ground and supply vector pins.
Power supply decoupling. The supply decoupling consists of a 10 μF capacitor (C3) to
ground. C4 to C7 are bypass capacitors.
Input interface. The SMA labeled J1 is the input. T1 is a 1-to-1 impedance ratio balun to
transform a single-ended input into a balanced differential signal. C1 and C2 provide
ac-coupling. C12 is a bypass capacitor. R1 and R2 provide a differential 50 Ω input
termination. R3 to R6 are used to select the input for the pin-strappable gain.
Maximum gain: R3, R4, R5, R6 = 0 Ω; R1, R2 = 40.2 Ω
Middle gain: R5, R6 = 0 Ω; R3, R4 = open; R1, R2 = 33 Ω
Minimum gain: R3, R4 = 0 Ω; R5, R6 = open; R1, R2 = 29 Ω
Output interface. The SMA labeled J3 is the output. T2 is a 1-to-1 impedance ratio balun to
transform a balanced differential signal to a single-ended signal. C13 is a bypass capacitor.
R7, R8, R9, and R10 are provided for generic placement of matching components. The
evaluation board is configured to provide a 200 Ω to 50 Ω impedance transformation with
an insertion loss of 17 dB. C9 and C10 provide ac-coupling.
Device enable. C8 is a bypass capacitor. When the P1 jumper is set toward the VPOS label,
the ENBL pin is connected to the supply, enabling the device. In the opposite direction,
toward the GND label, the ENBL pin is grounded, putting the device in power-down mode.
Rev. 0 | Page 20 of 24
Figure 45. Layout of Evaluation Board, Circuit Side
Default Condition
VPOS, GND = installed
C3 = 10 μF (Size D)
C4, C5, C6, C7, Cll = 0.1 μF
(Size 0402)
J1 = installed
R1, R2 = 40.2 Ω (Size 0402)
R3, R4, R5, R6 = 0 Ω (Size 0402)
C1, C2 = 0.01 μF (Size 0402)
C12 = 0.1 μF (Size 0402)
J3 = installed
R7, R8 = 84.5 Ω (Size 0402)
R9, R10 = 34.8 Ω (Size 0402)
R11 = open (Size 0402)
C9, C10 = 0.01 μF (Size 0402)
C13 = 0.1 μF (Size 0402)
ENBL, P1= installed
C8 = 0.1 μF (Size 0402)