AOZ8040 Datasheet, PDF (1/7 Pages) Alpha Industries – 8-Line EMI Filter with Integrated ESD Protection

AOZ8040
8-Line EMI Filter with Integrated ESD Protection
General Description
The AOZ8040 is an 8-line device integrating EMI filtering
with ESD protection for each line. It is designed to
suppress unwanted EMI/RFI signals and provide electro-
static discharge (ESD) protection in portable electronic
equipment. This state-of-the-art device utilizes AOS
leading edge Trench Vertical Structure [TVS]² ™
technology for superior clamping performance and filter
attenuation over the full operating display range. The
AOZ8040 has been optimized for protection of color LCD
displays and CCD camera lines in cellular phones and
other portable consumer electronic devices.
The AOZ8040 consists of eight identical circuits
comprised of TVS diodes for ESD protection, and a
resistor–capacitor network for EMI/RFI filtering.
A series resistor value of 100Ω and a capacitance
value of 9pF are used to achieve -20dB minimum
attenuation from 1.0GHz to 3.0GHz. The TVS diodes
provide effective suppression of ESD voltages in excess
of ±20kV (air discharge) and ±20kV (contact discharge).
This exceeds IEC 61000-4-2, level 4 ESD immunity test.
The AOZ8040 comes in an RoHS compliant, 1.2mm x
3.5mm, 0.4mm pitch DFN package and is rated over a
-40°C to +85°C ambient temperature range.
Features
● 8 lines for EMI filtering and ESD protection:
– Exceeds IEC 61000-4-2, level 4 (ESD) immunity test
– ±20kV (air discharge) and ±20kV (contact discharge)
● Trench Vertical Structure [TVS]² ™ based technology
used to achieve excellent ESD clamping & filter
performance over the full operating display range
● Filter performance: -20db attenuation from 1.0GHz to
3.0GHz
● Low operating voltage: 5.0V
● Capacitance stability over wide range of voltages and
temperatures
● DFN package: 1.2mm x 3.5mm, 0.4mm pitch
● Pb-Free device
● Green product
Applications
● EMI filtering and ESD protection for data lines
● LCD displays, camera interface, I/O interface
● Portable handheld devices, cell phones,
PDA phones
Typical Application
D0
CH1
100Ω
9pF
9pF
D1
CH2
100Ω
9pF
9pF
LCD/Camera
Module
D7
CH8
Rev. 1.2 March 2010
100Ω
9pF
9pF
Figure 1.
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