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INTRODUCTION
The AVRQ-5-B is designed to test the common mode transient immunity (CMTI) of
optocouplers.
The standard AVRQ-5-B can generate -1.5 or +1.5 kV pulses. The unloaded switching
time (10%-90%) is fixed at ≤ 10 ns. The transition time may be increased to at least 50
ns by adding high-voltage capacitors across the device under test (by soldering it to the
DUT daughterboard). This corresponds to transition rates of < 24 to > 120 kV/us.
The -AHV option provides greater flexibility in the amplitude setting, permitting
adjustment from 1.0 to 1.5 kV (+ or -) in ≤ 1V steps.
The -XHV option provides a different amplitude range of 1.5 to 2.0 kV (+ or -) in ≤ 1V
steps, but the minimum switching time increases to 15 ns.
A daughterboard arrangement is used to accommodate difference device packages
and bias conditions. A zero-insertion force (ZIF) socket accepts these daughterboards.
Eight daughterboards suitable for use with typical 5V DIP8 packages are included with
the AVRQ-5-B. The CAD/CAM files for these sample boards are available for download
at https://www.avtechpulse.com/semiconductor/avrq-5/#support_files. Users may
design their own daughterboards to accommodate other package styles.
The AVRQ-5-B mainframe provides the high-voltage common mode pulse (which is tied
to GND1), and VCC2 / GND2 (the non-floating output-side power supply). The user is
responsible for configuring the daughterboards to implement the correct input side
power (VCC1), biasing, filtering, loading, socketing, and glitch measurement. The
included sample boards implement these requirements for common DIP8 devices,
using configurable jumpers/resistors/capacitors. A probe point is provided on the main
circuit board for observation of the device logic output with a user-provided probe and
oscilloscope.
The ground-referenced output-side power (VCC2) is generated by the mainframe, and
is adjustable (+3V to +43V, 150 mA maximum). The floating input-side power is not
provided by the mainframe. Instead, an A23-type 12V battery should be installed on the
DUT daughterboard to provide a floating power source, along with a basic regulator
circuit to provide the necessary reg5V power (VCC1). A isolated battery
arrangement is used to ensure that the VCC1 power supply is not the source of any
glitches observed in the operation of the DUT.
The high-voltage pulse and the logic output of the DUT must be measured by the user,
using suitable high-impedance oscilloscope probes. Coaxial cabling should not be
used, because it will introduce too much parasitic capacitance.
The AVRQ-5-B features front panel keyboard and adjust knob control of the output
pulse parameters along with a four line by 40-character backlit LCD display of the rise
time, pulse width, pulse delay, and pulse repetition frequency. The instrument includes
6
Содержание AVRQ-5-B
Страница 52: ...Bottom side 52 ...
Страница 56: ...Top side Bottom side A P6246 differential probe was used to observe the logic outputs in the TLP2366 tests 56 ...
Страница 57: ...PCB 299B FOR ADUM241E0BRWZ 57 ...
Страница 82: ...PCB 158R2 LOW VOLTAGE POWER SUPPLY ...
Страница 87: ...DUT WIRING ON STANDARD DAUGHTERBOARD PCB 267C ...
Страница 88: ...DUT WIRING ON CUSTOMIZED TLP2366 DAUGHTERBOARD PCB 298B ...
Страница 89: ...DUT WIRING ON CUSTOMIZED ADUM241E0BRWZ DAUGHTERBOARD PCB 299B ...
Страница 91: ...PERFORMANCE CHECK SHEET 91 ...