Evaluation Board for Wideband

CMOS 4:1 Mux/SP4T

EVAL-ADG904/ADG904-R

Rev.

A

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FEATURES

Evaluation board for the ADG904/ADG904-R

RF through for evaluation board calibration

INTRODUCTION

This evaluation board document describes the evaluation board

for the ADG904/ADG904-R wideband multiplexers.

The ADG904/ADG904-R are wideband, analog 4:1 multiplexers,

using a CMOS process to provide high isolation and low inser-

tion loss to 1 GHz. The ADG904 is an absorptive/matched mux

having 50 Ω terminated shunt legs, whereas the ADG904-R is a

reflective mux. These devices are designed such that the isolation

is high over the dc to1 GHz frequency range.

The ADG904/ADG904-R switch one of four inputs to a

common output, RFC, as determined by the 3-bit binary

address lines (A0, A1, and EN). A Logic 1 on the EN pin

disables the device.

The ADG904/ADG904-R have on-board CMOS control logic,

thus eliminating the need for external controlling circuitry. The

control inputs are CMOS compatible.

Complete information and specifications for the ADG904 and

ADG904-R are available in the ADG904/ADG904-R data sheet

available from Analog Devices, Inc., and should be consulted in

conjunction with this evaluation board document when using

the evaluation board.

EVAL-ADG904-R/ADG904

C1

VDD

GND

J12

1

J3

K1

HL

EN

J1

K3

HL

A0

J2

K2

HL

A1

RF1

RF3

RFC

J5

J7

J4

RF2

RF4

CAL

CAL

J6

J8

J10

J9

U1

C2 C3

Figure 1. Evaluation Board (Top View)

POWER SUPPLIES

This evaluation board has one analog power supply input,

The A0, A1, and EN control inputs are applied by the SMB

using the links (K1 to K3) on the evaluation board. See Table 1

for details.

Table 1. Link Operation

A1 (K2)

A0 (K3)

EN (K1)

On Switch

X

X

H

None

L

L

L

RF1

L

H

L

RF2

H

L

L

RF3

H

H

L

RF4