EVAL-ADG904_15 Datasheet, PDF (3/8 Pages) Analog Devices – Evaluation Board for Wideband CMOS 4 1 Mux/SP4T

ADG904/ADG904-R
The ADG904/ADG904-R evaluation board allows designers to
evaluate the high performance, wideband switches with
minimum effort. To test these devices to ensure that they meet
the user’s requirements, the user needs only a power supply and
a network analyzer to use this evaluation board.
The RFC port is connected through a 50 Ω transmission line to
the bottom left SMA Connector J4. RF1, RF2, RF3, and RF4 are
connected through 50 Ω transmission lines to the SMA connectors
(J5, J6, J7, and J8, respectively). A through transmission line
connects J9 and J10, and this transmission line is used to estimate
the loss of the PCB over the environmental conditions being
evaluated (see Figure 2).
The board is constructed of a 4-layer, FR4 material with a
dielectric constant of 4.3 and an overall thickness of 0.062 inches.
Two ground layers with grounded planes provide ground for
the RF transmission lines. The design of the transmission lines
incorporates a coplanar wave guide with a ground plane model
using a trace width of 0.024 inches, clearance to a ground plane
of 0.008 inches, dielectric thickness of 0.02 inches, and a metal
thickness of 0.0021 inches.
EVAL-ADG904/ADG904-R
Two 10 μF surface-mount, tantalum decoupling capacitors are
provided on the VDD line, one placed close to the DUT along
with a 100 pF ceramic capacitor on the VDD line.
GND VDD
J12
1
EN
J3
A0
J1
A1
J2
C1
J5
RF1
J7
RF3
H
LH
LH
L
K1
K3
K2
C2 _C3
U1
J6
RF2
J8
RF4
J4
RFC
EVAL-ADG904-R/ADG904
CAL
J9
J10
CAL
Figure 2. ADG904/ADG904-R Evaluation Board (Top View)
Rev. A | Page 3 of 8