HCPL-7721 RESULTS
The HP / Agilent / Avago / Broadcom HCPL-7721 is a slower, older device (date code:
1214). It was tested using VCC2 = +5V, and the following daughterboard configuration:
Reference
Value
Typical Function
C6
Not used
Load capacitance
R1
0 Ω
Zero-Ohm Jumper to connect DUT pin 1 to VCC1
R2
Not used
Output pullup
R3
0 Ω for +5V input tests,
not used for 0V input tests.
Resistance to connect DUT pin 2 to VCC1.
Non-zero resistance for current-drive inputs.
R4
Not used
Zero-Ohm Jumper for DUT pin 7 as logic output
R5
Not used
Resistance to connect DUT pin 3 to VCC1
R6
0 Ω
Zero-Ohm Jumper for DUT pin 6 as logic output
R7
Not used
Resistance to connect DUT pin 4 to VCC1
R8
Not used
Zero-Ohm Jumper to connect DUT pin 1 to GND1
R9
Not used for +5V input tests,
0 Ω for 0V input tests.
Zero-Ohm Jumper to connect DUT pin 2 to GND1
R10
Not used
Zero-Ohm Jumper to connect DUT pin 3 to GND1
R11
0 Ω
Zero-Ohm Jumper to connect DUT pin 4 to GND1
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 socketing in the positive position, and AMP1 set
to +1.5 kV and AMP2 set to +5V, these waveforms were obtained:
Top = high voltage pulse
Bottom = Logic output for 0V input
Top = high voltage pulse
Bottom = Logic output for 5V input
With the daughterboard installed in the socketing in the negative position, and AMP1
set to -1.5 kV and AMP2 set to +5V, these waveforms were obtained:
49
Summary of Contents for AVRQ-4-B
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Page 51: ...Bottom side 51...
Page 67: ...PCB 158R5 LOW VOLTAGE POWER SUPPLY...
Page 68: ...PCB 104G KEYPAD DISPLAY BOARD...
Page 69: ...PCB 228C OP AMPS AHV AND XHV UNITS...
Page 71: ...DUT WIRING ON STANDARD DAUGHTERBOARD PCB 267D...
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Page 75: ...PERFORMANCE CHECK SHEET 75...