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PCB 298B is similar to the standard sample daughterboard, except that it provides a
footprint for a Toshiba TLP2366 in a 5-lead “SO6” SMT package. The DUT must be
soldered to the daughterboard. (A DUT socket is not practical for these tests, since the
extra parasitic capacitance introduced by a socket would severely degrade the
measured CMTI.)
Installation is similar to the standard daughterboards. For positive pulse mode, the
“AMP1” front-panel setting must be set to a positive value
AND
the daughterboard must
be installed in the socket so that it is in the left-most position (when viewed from the
DUT area door opening), closest to the socket lever.
For negative pulse mode, the “AMP1” front-panel setting must be set to a negative
value
AND
the daughterboard must be installed in the socket so that it is in the right-
most position (when viewed from the DUT area door opening), farthest from the socket
lever.
No configuration resistors are installed on this daughterboard by default, to provide
maximum flexibility for the user. Some resistors must be installed before they can be
used for test purposes.
Typically, R6 = 0 (to connect the DUT pin 5 to the logic output connector), and either
R8=0 (for 0 mA bias) or R1 = 560Ω (for 6 mA of bias).
To obtain the sample waveforms below, a Toshiba TLP2366 was tested using VCC2 =
+5V, and the following daughterboard configuration (including a rise time degradation
capacitance):
Reference
Value
Typical Function
C6
Not used
Load capacitance
R1
Not used for 0 mA tests,
560 Ω for 6 mA tests.
Resistance to connect DUT pin 1 to VCC1.
Non-zero resistance for current-drive inputs.
R2
Not used
Output pullup
R6
0 Ω
Zero-Ohm Jumper for DUT pin 6 as logic output
R8
Not used for 6 mA tests,
0 Ω for 0 mA tests.
Zero-Ohm Jumper to connect DUT pin 1 to GND1
P1, P2
150 pF
Rise-time capacitance added between the CAP pads
BT1
One A23-type 12V battery
One user-installed A23-type 12V battery, prime power for VCC1.
(Please note that A23 batteries have a limited mA·hr rating – typically
30 mA·hr when operating at 15 mA – so the battery should be removed
immediately after testing, and its output should verified to be between
6V and 12V before each test.)
With the daughterboard installed in the ZIF socket in the positive position (silkscreen
arrows pointing same direction, daughterboard is as close as possible to the ZIF lever),
and AMP1 set to +1.5 kV and AMP2 set to +5V, these waveforms were obtained:
54
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 ...