4500-CQIV-* Cable Set
Keithley Instruments, Inc.
28775 Aurora Road
Cleveland, Ohio 44139
(440) 248-0400
www.keithley.com
User’s Guide
Introduction
This document contains information on the 4500-CQIV-* cable set. This cable set is used to make signal connections to a
451x-QIVC card for LIV test and measurements of a DUT (device under test).
Connection precautions
WARNING Read all safety precautions listed at the beginning of the 4500-MTS Mainframe
manual and included with the CD-ROM. The following safety practices must be
used to protect operators and other users of this product from potential exposure
to electrical hazards:
• Operators must be protected from electrical hazards at all times.
• The interlock is required for safe operation. The test fixtures must ensure that
the interlock circuit is disabled (source outputs inhibited) so that an operator is
not exposed to any harmful conditions.
• Maximum isolation from earth ground is ±20V. Exceeding this value may result
in a shock hazard.
• When making connections, do not leave any exposed connections. Be sure that
all external circuits are properly insulated.
Handling precautions
To avoid possible contamination that could degrade measurement performance, observe these precautions:
• Operate the card and cable set only in a clean environment.
• Do not touch cable or card connector pins.
• If the connectors become contaminated, they can be cleaned with clean methanol and then blown dry with
dry nitrogen gas. Allow the cable connectors to dry for several hours at 50°C before use.
Description
Cable configuration
The overall configuration of the 4500-CQIV-* cable set is shown in Figure 1. The cable includes a 40-pin connector that
mates with the 451x-QIVC card signal connector on one end. It separates into a 15 pin D-Sub connector for each of the
four channels, A to D. Each 15-pin connector provides voltage bias, current source, and voltage measure connections to
the DUT.
PA-871 Rev. B / 12-03
Figure 1
4500-CQIV-* cable configuration
451x-QIVC card
signal connector
DUT signal
connectors for
channels A-D
Cable lengths
As summarized in Table 1 below, the 4500-CQIV-* cable set is available in four different lengths. The 2 meter length
cable (4500-CQIV-2) is supplied with the 451x-QIVC card.
Table 1
4500-CQIV-* cable lengths
Model
4500-CQIV-0.5 0.5
4500-CQIV-1 1
4500-CQIV-2* 2
4500-CQIV-3 3
* Cable supplied with 451x-QIVC card
** 0.5 to 2 meter cables are recommended for
use with the 4511-QIVC. 3 meter cables
are recommended for use with the 4510-QIVC.
Length
(meters)**
2
Connections
Card connections
To connect the cable to the card, connect the 40-pin cable connector to the signal connector on the 451x-QIVC card
(Figure 2).
Figure 2
451x-QIVC card signal connector
DUT signal
connector
DUT connections
Connector terminal designations
Table 2 lists card connector terminal designations for each of the four channels.
Typical DUT connections
Typical DUT connections for each of the four channels are shown in Figure 3.
Mating connector
To facilitate DUT connections, the following 15-pin solder cup mating connector for each of the four channel DUT
connectors on the 4500-CQIV-* cable is available: Keithley part number 4500-CIV-KIT-1.
3
Figure 3
DUT signal connections
Table 2
Connector terminal designations (each channel)
Signal Connector pin(s)
I-SOURCE HI
V-MEASURE HI
V-MEASURE LO
I-SOURCE LO
V-BIAS H I
GUARD
V-BIAS SENSE LO
V-BIAS LO
1. I-Source subchannel connections
2. V-Source subchannel connections
1
1
1
1
2
2
2
2
3 and 11
4
12
5 and 13
1
2
10
9
451x-QIVC card
I-READBACK
I-SOURCE
NOTE: The I-SOURCE circuit is bi-polar. It can source positive or negative current.
I-MEASURE
V-SOURCE
NOTE: The V-SOURCE circuit is bi-polar.
It can source positive or negative voltage.
V-MEASURE &
V-COMPLIANCE
High impedance pathways. Negligible
current flow.
V-READBACK
X1
Output
control
relays
Output
control
relays
Pin 3 & 11 : I-SOURCE HI
Pin 4: V-MEASURE HI
Pin 12: V-MEASURE LO
Pin 5 & 13: I-SOURCE LO
QIVC cable pin-out
(Channel A-D)
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15
Pin 1: V-SOURCE HI
Pin 2: GUARD
Pin 10: V-SOURCE SENSE LO
Pin 9: V-SOURCE LO
4
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