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7703
- Model7703
- MakerKeithley
- Description32-Channel High Speed Differential Multiplexer
- Rental문의요망
- Stock문의요망
This module is also similar to the Model 7700. Differences include the number of available channels and the
Model 7703 does support amps measurements. Model 7700 operation is covered in Section 2 of the
Models 2700, 2701, and 2750 User’s Manuals. Channel number designations for the Model 7703 are provided
at the end of this User’s Guide.
Model 7703 – connections and wiring
The Model 7703 is a 32-channel high speed differential multiplexer module with the following features:
• 2-wire or 4-wire ¾ measurement (automatically pairs switches for four wire measurements — n + 16)
• 50-pin D-Shell connectors (2 × DB50)
• Temperature applications (RTD or thermistor)
• High-speed non-latching reed relays (relays go to open state after power is removed or *RST)
• Designed specifically for use with Keithley’s Models 2700, 2701, and 2750 Systems.
klqb The 50-pin D-Shell connector mates with Model 7788.
GENERAL
32 CHANNELS: 32 channels of 2-pole relay input.
All channels configurable to 4-pole.
RELAY TYPE: Reed.
ACTUATION TIME: <1ms.
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): >5×104 operations at max signal level.
>108 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: >109Ω, <200pF.
ISOLATION BETWEEN ANY TERMINAL AND EARTH: >109Ω, <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 40% R.H. at 35°C.
STORAGE ENVIRONMENT: –25°C to 65°C.
WEIGHT: 0.8kg (1.75 lbs).
