IP3253_IP3254-TTL

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© NXP B.V. 2011. All rights reserved.

Product data sheet

Rev. 1 — 5 May 2011

5 of 13

NXP Semiconductors

IP3253/IP3254-TTL

Integrated 4-, 6- and 8-channel passive EMI-filter network

6.

Application information

6.1 Insertion loss

The devices are specifically designed as EMI/RFI filters for multichannel interfaces.

The block schematic for measuring insertion loss in a 50

Ω system is shown in Figure 1.

An example of the measurement curves for all channels is shown in Figure 2.

Test Printed-Circuit Board (PCB) utilizes laser-drilled micro-via holes which connect the ground

plane to the device ground pins.

Fig 1.

Frequency response setup

018aaa016

50 Ω

Vgen

50 Ω

DUT

OUT

IN

TEST BOARD

(1) Channel 1 (pin 1 to pin 8)

(2) Channel 4 (pin 4 to pin 5)

(1) Channel 3 (pin 3 to pin 6)

(2) Channel 2 (pin 2 to pin 7)

Fig 2.

IP3253CZ8-4-TTL measured insertion loss magnitudes

001aak301

−30

−20

−40

−10

0

(dB)

−50

f (MHz)

10

(1)

(2)

001aak302

−30

−20

−40

−10

0

(dB)

−50

f (MHz)

10

(1)

(2)