HCPL-7721 RESULTS
The HP / Agilent / Avago HCPL-7721 is a slower, older device. It 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
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
P1, P2
150 pF
No 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:
Top = Logic output for 0V input
Bottom = high voltage pulse
Top = Logic output for 5V input
Bottom = high voltage pulse
50
Summary of Contents for AVRQ-5-B
Page 52: ...Bottom side 52 ...
Page 57: ...PCB 299B FOR ADUM241E0BRWZ 57 ...
Page 82: ...PCB 158R2 LOW VOLTAGE POWER SUPPLY ...
Page 87: ...DUT WIRING ON STANDARD DAUGHTERBOARD PCB 267C ...
Page 88: ...DUT WIRING ON CUSTOMIZED TLP2366 DAUGHTERBOARD PCB 298B ...
Page 89: ...DUT WIRING ON CUSTOMIZED ADUM241E0BRWZ DAUGHTERBOARD PCB 299B ...
Page 91: ...PERFORMANCE CHECK SHEET 91 ...