34905A AGILENT TECHNOLOGIES, 34905A Datasheet - Page 21

• Manufacturer Part Number: 34905A
• Description: Computers, Data Switches
• Manufacturer: AGILENT TECHNOLOGIES

Specifications of 34905A

• Frequency Range: 45Hz To 66Hz
• Bandwidth: 2GHz
• Isolation: -35dB
• Insertion Loss: -3dB
• Lead Free Status / RoHS Status: na

Multiplexer selection guide
Choose between the broad functionality of the 34901A, the
high speed scanning of the 34902A, or the single-ended
density of the 34908A. These three modules are the only
way to connect to the 34970A/34972A internal DMM. They
can be used to scan with external instruments as well.
All multiplexer modules employ break-before-make
scanning, ensuring only one closed channel (or channel
pair) at a time. Multiple channel closures are allowed on
the 34901A and 34902A modules when not configured
for scanning.
The 34908A does not allow multiple channel closures
at any time.
34901A
20-Channel General Purpose Multiplexer
• 60 ch/s scanning
• Two- and four-wire scanning
• Built-in thermocouple reference
• 300 V switching
The Agilent 34901A is the most
versatile multiplexer for general
purpose scanning. It combines
dense, multifunction switching with
60-channel/second scan rates to
address a broad spectrum of data
acquisition applications.
Two- and four-wire channels can
be mixed on the same module. Two
additional fused inputs (22 channels
total) route up to 1 A of current to
the internal DMM, allowing ac and dc
current measurements without the
need for external shunt resistors.
junction
Internal
DMM input
Reference
junction
sensor
Internal
DMM input
(4W sense)
Internal
DMM input
(Current)
Backplane switches
Number of channels
Max scan speed
Number of contacts
Temperature
Thermocouple
dc Volts
ac Volts
2-wire Ohms
4-wire Ohms
Frequency
Period
dc current
ac current
H
L
H
L
I
L
2-wire RTD
4-wire RTD
Thermistor
T
Bank switch
Shunt switches
Channel switches
60 ch/s
34901A
20 + 2
2 or 4
●
●
●
●
●
●
●
●
●
●
●
●
Fuse
Fuse
250 ch/s
34902A
2 or 4
16
●
●
●
●
●
●
●
●
●
●
H
L
H
L
H
L
H
L
H
L
H
L
I
L
I
L
I
L
01
10
Com
Com
(4W sense)
11
20
21
Current
channels
22
Com
(Current)
60 ch/s
34908A
40
●
●
●
●
●
●
●
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1
21