Texas Instruments ESD224, Руководство пользователя

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1 SLVUBE1A – February 2018 – Revised April 2018
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ESD224 Evaluation Module User's Guide
User's Guide
SLVUBE1A – February 2018 – Revised April 2018
ESD224 Evaluation Module User's Guide
This user's guide describes the characteristics, operation, and use of the ESD224EVM evaluation module
(EVM). This EVM includes four ESD224’s, two to test the characteristics of the ESD224 and two in HDMI
pass-through mode. One ESD224 is used to measure bandwidth, one ESD224 is used to measure the
clamping voltage during an IEC61000-4-2 ESD strike and two ESD224's are configured to pass-through
HDMI 2.0 signals using an HDMI Type A female and male header. This user's guide includes setup
instructions, schematic diagrams, a bill of materials, and a printed-circuit board layout drawing of the EVM.
Trademarks
1 Introduction
Texas Instrument’s ESD224 evaluation module helps designers evaluate the operation and performance
of the ESD224 device. The ESD224 is a quad-channel ESD protection device in a small DQA package
which offers IEC61000-4-2 Level 4 compliant ESD protection. The 0.5-pF line capacitance is suitable for
high speed applications. The ESD224 is characterized for operation over an ambient air temperature
range of –40°C to 125°C.
The EVM contains four ESD224’s, two for electrical characterization of the device and two sitting on the
TMDS Data and Clock Lines with an HDMI female header on one side and a HDMI male header on the
other. The HDMI 2.0 pass-through portion of the board can be snapped off to be used by itself. This
allows the EVM to be connected to an HDMI port via a HDMI cable and pass HDMI 2.0 signals through.
The other portion of the board allows the device to be characterized.
Table 1. EVM Configuration
Reference Designator TI Part Number Configuration
U1 ESD224 S-Parameters
U2 ESD224 ESD Clamping waveforms
U3 – U4 ESD224 HDMI 2.0 Pass-Through
2 Definitions
Contact Discharge — a method of testing in which the electrode of the ESD simulator is held in contact
with the device-under-test (DUT).
Air Discharge — a method of testing in which the charged electrode of the ESD simulator approaches
the DUT, and a spark to the DUT actuates the discharge.
ESD simulator — a device that generates IEC61000-4-2 compliance ESD waveforms shown in Figure 1
with adjustable ranges shown in Table 2 and Table 3 .
IEC61000-4-2 has 4 classes of protection levels. Classes 1 – 4 are shown in Table 2 . Stress tests
should be incrementally tested to level 4 as shown in Table 3 until the point of failure. If the DUT
does not fail at 8 kV, testing can continue in 2 kV increments until failure.
Table 2. IEC61000-4-2 Test Levels
Contact Discharge Air Discharge
Class Test Voltage [± kV] Class Test Voltage [± kV]
1 2 1 2
2 4 2 4