ISL54210EVAL1Z Intersil, ISL54210EVAL1Z Datasheet - Page 2

• Manufacturer Part Number: ISL54210EVAL1Z
• Description: EVALUATION BOARD FOR ISL54210
• Manufacturer: Intersil

Specifications of ISL54210EVAL1Z

• Main Purpose: Interface, 2:1 Multiplexer
• Embedded: No
• Utilized Ic / Part: ISL54210
• Primary Attributes: 2 x SPDT Analog Switch
• Secondary Attributes: 2.7 V ~ 3.6 V Supply
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Power Supply
The DC power supply connected at banana jacks J10 (VDD)
and J11 (GND) provides power to the part. The IC requires a
2.7V to 3.6V DC power supply for proper operation. The power
supply should be capable of delivering 100µA of current.
Logic Control
The state of the ISL54210 device is determined by the
voltage at the V
have internal 4M
floating.
Access to the CTRL pin is through the banana jack J12
(CTRL).
Access to the V
when jumper JP3 is in position 2 to 3 and through the USB
J1 (USB TO HOST) connector V
JP3 is in position 2 to 1.
If V
J1 connector) and CTRL = High (J12 connected to J10), the
part will be in the Audio mode.
If V
J1 connector) and CTRL = Low or Floating, the part will be in
the MUTE mode. In MUTE mode all switches are OPEN and
the click and pop circuitry on the L and R side of the switch is
activated.
If V
line connected at the J1 USB connector), the part will be in the
USB mode. In a typical application, the V
computer/host controller will be in the range of 4.4V to 5.25V
and the V
When the computer is not connected at J1, the internal
pull-down will pull the V
the Audio mode or Mute mode depending on the condition of
the CTRL pin.
When a USB cable from the computer is connected at J1,
the voltage at the V
will automatically go into the USB mode.
When the USB cable is disconnected from the J1 connector,
the voltage at the V
pull-down resistor and return to the Audio mode or Mute
mode depending on the condition of the CTRL pin.
Note: The evaluation board has the option of putting a 4M
pull-down resistor from the V
jumper at JP4. However, it is not required for the ISL54210
part because the V
pull-down resistors. These resistors pull the logic pins to
ground when J13, J1, or J12 are floated.
Rather than using the V
control the V
J1 (USB TO HOST), you can drive the V
banana jack J13 (V
BUS
BUS
BUS
is greater than V
is floating (no USB host controller connected at the
is floating (no USB host controller connected at the
DD
BUS
voltage will be in the range of 2.7V to 3.6V.
BUS
BUS
Ω
logic pin of the part through USB connector
pull-down resistors and can be left
BUS
BUS
BUS
BUS
pin and the CTRL pin. These logic pins
pin is through banana jack J13 (V
BUS
). To control the part through the J13
and CTRL pins have internal 4M
BUS
DD
pin will be driven high and the part
pin will be pulled low by the
by 0.8V (USB computer V
pin low putting the ISL54210 in
voltage from the computer to
BUS
2
BUS
pin to ground by putting a
line when the jumper
BUS
BUS
voltage from
pin through the
Application Note 1407
BUS
BUS
Ω
Ω
)
banana jack make the following connections: Install jumper
JP3 at location 2 to 3. This connects the J13 banana jack to
the V
Audio Inputs
The evaluation board has two audio inputs labeled AUDIO
LEFT (J3 or J5) and AUDIO RIGHT (J4 or J6). Each of these
inputs have a BNC connector wired in parallel with an RCA
jack connector. You can connect an audio source/generator
at either the BNC connector or the RCA connector.
In a typical application the left and right outputs of a stereo
source, such as an MP3 player, would be connect to the
RCA jacks J3 and J4, respectfully.
Over a signal range of ±1V (0.707V
have an extremely low r
pass ground referenced audio signals with very low
distortion (<0.05% THD+N) when delivering 15.6mW into a
32Ω headphone speaker load. A 3V
but performance will degrade.
The audio channels are AC coupled with 100µF capacitors.
These capacitors remove any DC voltage from the audio
signals and reference them to ground of the device. If the
audio source being connected to the evaluation board
already has internal AC coupling capacitors at the output of
its drivers, then the capacitors on the evaluation board
should be shorted out (replaced with 0Ω resistors). This will
prevent further attenuation of the low frequency content of
the audio signal due to the increase of the high-pass corner
frequency resulting from the evaluation board capacitor in
series with the audio source capacitor.
Audio Outputs
The evaluation board has a standard headphone jack
labeled HEADPHONE JACK (J7). A 32
should be plugged into this jack.
The BNC connector J8 (COM-) is in parallel with the audio
left line of the headphone jack and the D- line of the J1 (USB
To HOST) connector. The BNC connector J9 (COM+) is in
parallel with the audio right line of the headphone jack and
the D+ line of the J1 (USB To DEVICE) connector. These
BNC connectors can be used to connect resistive loads
and/or test equipment to evaluate the performance of the IC.
USB Connections
A “B” type USB receptacle labeled USB TO HOST (J1) is
located on the left under-side of the board. This receptacle
should be connected using a standard USB cable to the
up-stream USB host controller, which is usually a PC
computer or hub. When this connection is made, the
ISL54210 device will sense the V
controller and go into USB mode. The USB switches will be
turned ON.
An “A” type USB receptacle labeled USB TO DEVICE (J2) is
located on the right under-side of the board. The USB device
BUS
pin of the part.
ON
resistance variation. They can
BUS
RMS
P-P
voltage from the host
Ω
signal is acceptable
), these switches
stereo headphone
January 23, 2009
AN1407.0