Datasheet

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1.888.KEITHLEY (U.S. only)
A GREATER MEASURE OF CONFIDENCE
Model 7703 Specifications
SWITCH/MEASURE SYSTEMS
27
Integra Series Multimeter/Switch Systems
Modules
7703 32-CHANNEL HIGH SPEED DIFFERENTIAL
MULTIPLEXER
FEATURES
• There are 32 channels for general purpose measurement.
• Relay actuation time of less than 1ms for high-speed scanning.
•2 or 4 wire measurement.
•Two 50-pin female “D-sub” connectors are standard for secure hook-up and
quick teardown.
• Configurable as two independent banks of multiplexers.
• Reed relay based design with 300 volt, 500mA; 10VA.
•Two mating connector with solder cup (Model 7788) are supplied.
• Relay closures stored in on-board memory.
GENERAL
32 CHANNELS: 32 channels of 2-pole relay input.
All channels configurable to 4-pole.
RELAY TYPE: Reed.
ACTUATION TIME: <1ms.
FIRMWARE: Specified for Model 2700 rev. A01, 2701 rev. A01, and 2750 rev. A01
or higher.
CAPABILITIES
CHANNELS 1-32: Multiplex one of 32 2-pole or one of 16 4-pole signals into DMM.
INPUTS
MAXIMUM SIGNAL LEVEL:
Channels (1-32): 300V DC or rms, 0.5A switched, 10W maximum.
Contact Life (typ): >5×10
4
operations at max signal level.
>10
8
operations cold switching.
CONTACT RESISTANCE: <1Ω at end of contact life.
CONTACT POTENTIAL: <±3µV typical per contact, 6µV max.
<±3µV typical per contact pair, 6µV max.
OFFSET CURRENT: <100pA.
CONNECTOR TYPE: 50 pin D-sub×2.
RELAY DRIVE CURRENT: 20mA per channel.
ISOLATION BETWEEN ANY TWO TERMINALS: >10
9
Ω, <200pF.
ISOLATION BETWEEN ANY TERMINAL AND EARTH: >10
9
Ω, <400pF.
CROSS TALK (1 MHz, 50Ω Load): <–40dB.
INSERTION LOSS (50Ω Source, 50Ω Load): <0.35dB below 1MHz.
<3dB below 2MHz.
COMMON MODE VOLTAGE: 300V between any terminal and chassis.
ENVIRONMENTAL
OPERATING ENVIRONMENT: Specified for 0°C to 50°C.
Specified to 80% R.H. at 35°C.
STORAGE ENVIRONMENT: –25°C to 65°C.
WEIGHT: 0.8kg (1.75 lbs).
ACCESSORIES AVAILABLE:
Model 7705-MTC-2 50 Pin Male to Female DSUB Cable, 2m (6.6 ft).
Channel 1
HI
LO
Channel 16
HI
LO
(Channels 2–15)
Channel 17
HI
LO
Channel 32
HI
LO
(Channels 18–31)
Backplane
isolation
HI
LO
Sense
Backplane
isolation
HI
LO
Input
Channel 35
2-Pole (Closed)
4-Pole (Open)
(see Note)
To Model 2700,
2701, or 2750
Backplane
NOTE Channels 33–35 in this schematic
refer to the designations used for
control and not actual available channels.
For more information, refer to the
ROUTE:MULT command section
in the Model 2700, 2701, or 2750 User’s Manual.
Channel 33
(see Note)
Channel 34
(see Note)
Card Sense
HI
LO
Card Input
HI
LO