Product Specification

SP43204

Page 5 of 7

│

Evaluation Kit

The 2-bit DSA EK Board was designed to ease

customer evaluation of SIPAT’s SP43204.

For automated programming, connect the test

harness provided with the EVK to the parallel port

of the PC and to the 6-pin header of the

PCB.

Connect the loose wire of the supplied

cable to a power supply set at 3.3V DC.

Set the

SP3T switches S1 and S2 to the ‘MIDDLE’ toggle

position.

After downloading and installing the

DSA EVK software from www.psemi.com, run the

software and select ‘SP43204’ from the drop down

menu. Using the software, enable or disable

each setting to the desired attenuation state. The

software automatically programs the DSA each

time an attenuation state is enabled or disabled.

For manual programming, disconnect the test

harness provided with the EVK. Apply 3.3V to

the Vdd header pin and Ground to the GND

header pin. The DUT can be controlled two ways:

1. The mechanical switches in conjunction with

the VCTL pin can be used. Apply desired control

voltage to VCTL header pin. The top mechanical

switch controls the 6dB stage, the bottom

mechanical switch controls the 12dB stage. For

each switch, the left position is the 0V condition,

while the right position is the Vctrl condition. The

middle position leaves the control pin floating.

2. The CTL1 and CTL2 pins on the header can be

used. Each pin directly controls the 6dB and 12dB

stage respectively. The VCTL pin on the header is

left open. The mechanical switches may be left

uninstalled or must be kept in the middle position.

Note: To minimize switching time, C3 and C4 can

be removed.

Power-up Control Settings

The SP43204 will always power up into the state

determined by the voltages on the 2 control pins.

The DSA can be preset to any state within the 18

dB range by pre-setting the parallel control pins

prior to power-up. There is a 10

µs delay between

the time the DSA is powered-up to the time the

desired state is set. If the control pins are left

floating during power-up, the device will default to

the minimum attenuation setting (insertion loss

state).

Figure 14. Evaluation Board Layouts

Figure 15. Evaluation Board Schematic

SIPAT Specification 102/0416

SIPAT Specification 101/0344

Z=50 Ohm

De-embeding trace

Z=50 Ohm

Z=50 Ohm

CENTER GND PAD

3

1

2

4

S1

SS14MDP2

1

J2

SMASM

1

J5

SMASM

1

J4

SMASM

1

J3

SMASM

3

1

2

4

S2

SS14MDP2

1

1

3

3

5

5

2

2

4

4

6

6

J1

HEADER 3X2

RF2

RF2

RF1

RF1

NC

NC

1

2

8

9

7

3

13

U1

SP43204

C1

0.1µF

C2

100pF

C3

10PF

C4

10PF

VCTL

CTL2

VDD

CTL1

Tel: +86-23-62808818

Fax: +86-23-62805284

www.sipatsaw.com / sawmkt@sipat.com