Intersil ISL54059EVAL1Z, ISL54061EVAL1Z, ISL54060EVAL1Z, ISL54062EVAL1Z, ISL54063EVAL1Z User Manual

®

ISL54059EVAL1Z Through ISL54064EVAL1Z

Evaluation Board User’s Manual

Application Note February 3, 2009

Description

The ISL54059EVAL1Z, ISL54060EVAL1Z,
ISL54061EVAL1Z, ISL54062EVAL1Z, ISL54063EVAL1Z
and ISL54064EVAL1Z evaluation board is designed to
provide a quick and easy method for evaluating the
ISL54059 through ISL54064 ICs.

The ISL54059 and ISL54062 ICs are a single supply Dual
Single-Pole Double Throw (SPDT) analog switches while the
ISL54060, ISL54061, ISL54063 and ISL54064 IC’s are
single supply Dual Single-Pole Single Throw (SPST) analog
switches. All devices feature negative swing capability,
sub-

Ω ON-resistance, and low power dissipation. The ICs

are designed for applications that require an analog switch
that may see voltages below ground at the switch terminals,
such as audio and video. The evaluation board is developed
to evaluate the ISL540XX ICs, integrating many features for
ease of use in examining the performance of the device
under various operating conditions. To help understand the
operation of the ISL540XX IC and the ISL540XXEV AL1Z
evaluation board, it is recommended to study the evaluation
board schematic found on page 4 of this document and the
datasheet for the IC under evaluation.

The ICs are analog switches that are capable of swinging
down to 6.5V below the positive supply rail. For example, if
the supply is at +1.8V, the switch terminal analog operating
range is from -4.3V to +1.8V. The ISL54062, ISL54063, and
ISL54064 also integrate Click and Pop Elimination Circuitry
to remove transient noises at th e speaker during power
ON/OFF of an audio system. The evaluation board contains
standard RCA/BNC connectors and a single headphone jack
to allow the user to easily interface with the IC to evaluate its
functions, features, and performance.

This application note will guide the user through the process
of configuring and using the evaluation board to evaluate the
ISL540XX devices.

Key Features

• RCA Audio Input/Output Jacks, Stereo Headphone Output
Jack and BNC Connectors

• Convenient Test Points and Connections for Test
Equipment

• Click and Pop Elimination Circuitry (ISL54062, ISL54063,
and ISL54064)

• Manual or External Logic Input Control

AN1369.0

Picture of Evaluation Board (Top View)

FIGURE 1. ISL54059EVAL1Z THROUGH ISL54064EV AL1Z

EVALUATION BOARD

Board Architecture/Layout

Basic Layout of Evaluation Board

A picture of the evaluation board is located in Figure 1. The
ISL540XX IC is located inside socket U1 located at the
center of the evaluation board. The IC needs to be
orientated inside the socket such that the pin 1 indicator on
the IC is aligned with the pin 1 indicator dot inside the
socket. The evaluation board integrates the necessary
connections and components to interface with the ICs for
ease of operation.

Power Supply

The ISL540XX IC requires a supply voltage in the range of
+1.8V to +6.5V for proper operation. Banana jacks for V
(J1) and GND (J2) are located at the top of the board. The
evaluation board contains a 10µF bulk capacitor and a 0.1µF
high frequency decoupling capacitor at the supply lines.

Logic Control

The evaluation board contains two types of logic control to
the digital logic inputs of the IC available to the user. The
logic pins can be controlled either through manual or
external operation. The logic control pins are manually
toggled by the SPST switches mounted on the evaluation
board (S1-S2). When the switch is in the up position (H), the
associated logic pin is pulled to V
the switch is in the down position (L), the associated logic
pin is pulled to GND for logic LOW. For manual operation,
the jumpers JP6-JP7 need to be in the 2-3 position.

for logic HIGH. When

CC

CC

1

For external control via a function generator or switch ed
source, set the jumpers JP6-JP7 in the 1-2 position. This
by-passes the SPST switches and routes the logic control to

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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Copyright Intersil Americas Inc. 2009. All Rights Reserved

Application Note 1369

the BNC connectors J13-J14 located on the bottom right side
of the board.

Note: There are 500k

Ω logic pull-down resistors on the INx

control pins. In external control mode when the digital logic
input lines are left in a floating state, these pull-down resistors
bias the logic inputs to ground.

Switch Terminals

The evaluation board contains components to interface with
all six terminals of the Dual SPDT switch (four terminals for
the SPST switches). The common (COM) terminals of the
switch are located on the right side of the evaluation board.
The Normally Open (NO) and Normally Closed (NC) terminals
of the switch are located on the left side of the evaluation
board. All switch terminals include both RCA jacks and BNC
connectors. The COM terminals also include a headphone
jack (HJ1) for connecting a stereo headphone or li ne level
plug.

Note: There are 10kΩ pull-down resistors on the NCx and
NOx pins of the evaluation board (R21, R22, R23, and R26).
They will need to be depopulated if the user does not desire to
have them.

Refer to Table 1 for a list of the connections on the
ISL540XXEV AL1Z and the associated pin of the IC. The
evaluation board also includes Test Points for convenient
locations to probe specific pins on the IC.

TABLE 1. BOARD COMPONENT TABLE

DEVICE

PIN

V

CC

GND J2 TP2 All

IN1 S2, J13 TP8 All
IN2 S1, J14 TP9 All

NO1 J11, J12 TP7 ISL54059,

NC1 J5, J6 TP4 ISL54059,

COM1 J3, J4, HJ1 TP3 All

NO2 J15, J16 TP10 ISL54059,

NC2 J7, J8 TP5 ISL54059,

COM2 J9, J10, HJ1 TP6 All

EVAL UA TION BOARD

CONNECTION

J1 TP1 All

TEST

POINT

APPLICABLE

IC

ISL54060,
ISL54062,
ISL54063

ISL54061,
ISL54062,
ISL54064

ISL54060,
ISL54062,
ISL54063

ISL54061,
ISL54062,
ISL54064

Note: All switch terminals on the evaluation board have
place holders that can have surface mounted components
placed either in series with the switch path or shunted to
ground. Jumpers on these components allow flexible
configurations. Refer to the Evaluation Board Schematics
located on page 4 for clarification.

Power Supply

The DC power supply connected at banana jacks J1 (VCC)
and J2 (GND) provides power to the evaluation board. The
evaluation board requires a +1.8V to +6.5V DC power
supply for proper operation. The power supply should be
capable of delivering 100µ

A of current.

Logic Control

The state of the ISL540XX IC is determined by the Truth
Table as defined in their respective datasheet. When in
manual operation mode, the logic being toggled by the
SPST switches (S1-S2) will always drive the voltage of the
logic pin to V

for a HIGH and GND for a LOW. In external

CC

control mode, the voltages being driven by an external
source must meet appropriate V

and VIL levels as defined

IH

in the datasheet.
The control pins are 1.8V logic compatible up to a +3.3V

supply, which allows for control via a standard µcontroller.
Logic “0” (LOW) when ≤ 0.5V (or floating)
Logic “1” (HIGH) when ≥1.4V

When operating above +3.3V supply, refer to the datasheet
for appropriate logic levels to drive the logic pins. It is always
recommended to drive the logic pins to the positive supply
rail (V

) and GND to minimize power consumption.

CC

Logic States

INPUT SELECT (INX) PINS

If the INx Pins are logic “HIGH”, then the NOx switches are
turned ON and the NCx switches are turned OFF. If the INx
Pins are logic “LOW”, then the NCx switches are turned ON
and the NCx switches are turned OFF.

CLICK AND POP OPERATION (ISL54062, ISL54063,
ISL54064 ONLY)

Single supply audio sources are biased at a DC offset that
generates transients during power ON/OFF of the audio
source. This DC offset is coupled through a blocking
capacitor that is need to remove the DC bias to the speaker,
causing a transient voltage at the load. For example, when
the source is OFF and suddenly turned ON with a DC offset,
the capacitor will develop a voltage equal to the DC offset.
This voltage gets discharged by the speaker causing a click
and pop noise. The ISL54062, ISL54063, and ISL54064 ICs
integrate circuitry to eliminate click and pop noises to the
speaker.

For proper operation of Click and Pop elimination, the switch
terminal that is being connected to the speaker should be
connected through the integrated shunt resistor before

2

AN1369.0

February 3, 2009