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Model 3724 Dual 1x30 FET Multiplexer Specifications


Document number: SPEC-3724A

Specifications are subject to change without notice.

DUAL 1 × 30 FET MULTIPLEXER CARD

60 differential channels, automatic CJC with 3724-ST

MULTIPLEXER CONFIGURATION: Two independent 1 × 30 2-pole Multiplexers. Banks can be connected together via relay creating a single 1 x 60 Multiplexer. Banks can be isolated from the backplane by relays. Card can be configured for 2 wire and 4 wire.

CONTACT CONFIGURATION: 2 pole form A.

CONNECTOR TYPE: Two 78 pin male D-shells.

MODEL 3724-ST SCREW TERMINAL OPTION: #22 AWG typical wire size with 0.062 inch O.D. 124 conductors maximum. 16 AWG maximum wire size with 0.092 inch O.D. 36 conductor per card maximum.

MAXIMUM SIGNAL LEVEL: 200 V DC or 141 V RMS between any terminal, 0.1A switched (0.1A carry), 800mW.

COMMON MODE VOLTAGE: 300 V DC or RMS between any terminal and chassis.

VOLT-HERTZ LIMIT : 107.

CONTACT LIFE:
Solid State > unlimited
EMR (Backplane) > 1×10operations @ 5V, 10mA
1×10operations @ maximum signal level

  Dual 1 × 301  Single 1 × 601, 2 
Channel Resistance (HI and LOW Path)   <62Ω (54Ω@23ºC)  <64Ω (58Ω @23ºC) 
 Contact Potential (differential)   <±2μV   <±2.5μV
Offset Current   <10nA (<±100pA@23ºC/60% R.H.)  <10nA (<±100pA@23ºC/60% R.H.)
Isolation    
  Differential  109Ω, 500pF 109Ω, 1100pF
  Bank-Bank     109Ω, 100pF  —
  CH –CH   109Ω, 125pF  109Ω, 125pF 
  Common mode  109Ω, 150pF   109Ω, 700pF 
Crosstalk CH-CH (50Ω Source, 50 Ω Load)
300KHz:
1MHz:
 
−40 dB
−30 dB

−40 dB
−30 dB 
Bandwidth (50 Ω Source, 50 Ω Load)  2MHz 1MHz 

1 Connections made using 3724-ST.

2 3706 mainframe with all DMM backplane relays disconnected. Maximum two card backplane relays closed.

GENERAL:

ACTUATION TIME: <0.2ms.

TEMPERATURE ACCURACY USING AUTOMATIC CJC WITH 3724-ST ACCESSORY: 1°C for J, K, T, and E type (see mainframe specification for details).

RELAY TYPE: Optically isolated FET.

RELAY DRIVE SCHEME: Direct.

INTERLOCK: Backplane relays disabled when interlock connection removed.

RELAY DRIVE CURRENT: 4mA.

OPERATING ENVIRONMENT:
Specified for 0°C to 50°C.
Specified to 70% R.H. at 35°C.

STORAGE ENVIRONMENT: −25°C to 65°C.

WEIGHT: 2.5lb.

FIRMWARE: Requires main revision to be 1.20 or above (applies to all 3706 series mainframes).

SAFETY: Conforms to European Union Directive 73/23/EEC, EN61010-1.

EMC: Conforms to European Union Directive 2004/108/EC, EN61326-1.

TYPICAL SCANNING SPEEDS, SWITCH ONLY3

  Ch/Sec
Sequential scanning, single channel, Immediate Trigger Advance   > 1250

 TYPICAL SCANNING SPEEDS, WITH MEASUREMENTS INTO MEMORY4

  Ch/Sec
DCV (10V range) or 2W Ohms (1KΩ range)   >1000
 Thermocouple  >1000
 3 or 4 Wire RTD   >450
 4 Wire Ohms (1KΩ range)  >450 
 ACV (10V, 400Hz range )  >1000

3 Scanning script local to mainframe, within same bank, break before make.
4 3706 mainframe with autorange off, limits off, dmm.autodelay=0, dmm.autozero=0, 4½ digits (NPLC=.006), for ACV dmm.detectorbandwidth=300, for OHMs dmm.offsetcompensation=off, dmm.opendetector=off. Scanning script local to mainframe, sequential scan within same bank (2 pole) or card (4 pole), and break before make switching. 

 Power Budget Information:

Quiescent Power (milliwatts): 1150
Channel Relay Power (milliwatts) each: 20
Backplane Relay Power Consumption (milliwatts) each: 100
See Chapter 8 of the series 3700 user’s manual for more detailed information.

ACCESSORIES AVAILABLE:

3791-KIT78-R 78 pin female D-sub connector kit (contains 2 female D-sub connectors and 156 solder cups).
3720-MTC-3 78 pin D-sub female to male cable, 3m.
3720-MTC-1.5 78 pin D-sub female to male cable, 1.5m.
3724-ST screw terminal block.
3791-CIT Contact insertion and extraction tool.

60 differential channels, Automatic CJC w/3724-ST

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Copyright © Tektronix. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Specification and price change privileges reserved. TEKTRONIX and TEK are registered trademarks of Tektronix, Inc. All other trade names referenced are the service marks, trademarks or registered trademarks of their respective companies.

SPEC-3724 July 2008