Agilent Technologies 22A Specifiche Scaricare il pdf (Pagina 9)

Table 2. Multiplexer selection table—specifications and characteristics*

34921A 34922A 34923A 34924A 34925A

Channels/configurations 40 2-wire 70 2-wire 80 1-wire 70 2-wire 80 1-wire

20 4-wire 35 4-wire 40 2-wire 35 4-wire 40 2-wire

4-current 20 4-wire 20 4-wire

Switch type Armature Armature Reed Reed Optically isolated FET

latching latching

Input characteristics (per channel)

Max volts ± 300 V

[1]

± 300 V

[1]

± 150 V peak

[2]

± 150 V peak

[2]

± 80 V peak

[2]

Max current (DC, AC RMS)

Switch current 1 A 1 A 0.5 A 0.5 A 0.02 A

[8]

Carry current 2 A 2 A 1.5 A 1.5 A

Power (W, VA)

[6]

60 W 60 W 10 W 10 W 1.6 W

Volt-Hertz limit 10

General specifications

Offset voltage

[3]

< 3 uV < 3 uV < 50 uV < 50 uV < 3 uV

< 100 uV 1-wire

Initial closed channel res

[3]

< 1.5 Ω < 1.5 Ω < 1.5 Ω

[5]

< 1.5 Ω

[5]

< 700 Ω

Leakage current

[3]

N/A N/A N/A N/A 20nA

[9]

T/C cold junction accuracy

[3, 10]

< 1°C N/A N/A N/A N/A

AC characteristics

Bandwidth at terminal block

[4]

45 MHz 25 MHz 45 MHz 25 MHz 1 MHz

10 MHz 1-wire

Crosstalk at terminal block (ch-ch)

[4]

300 kHz -75 dB -75 dB -75 dB -75 dB N/A

1 MHz -75 dB -75 dB -75 dB -70 dB

20 MHz -50 dB -50 dB -50 dB -45 dB

45 MHz -40 dB -40 dB

Capacitance at terminal block

HI-LO 150 pF 250 pF 130 pF 200 pF 100pF

LO – earth 150 pF 200 pF 120 pF 170 pF 300pF (600pF 1-wire)

General characteristics

Relay life, typical

No load 100 M 100 M 1000 M 1000 M N/A

10 V, 100 ma 10 M 10 M 10 M 10 M N/A

Rated load 100 k 100 k 10 k 10 k N/A

Scanning speeds

[7]

100 ch/sec 100 ch/sec 500 ch/sec 500 ch/sec 1000 ch/sec

Open/ close time, typical 4 ms/4 ms 4 ms/4 ms 0.5 ms/0.5 ms 0.5 ms/0.5 ms 0.25 ms/0.25 ms

Analog bus backplane connection Yes Yes Yes Yes Yes

[1] DC or AC RMS voltage, channel-to-channel

or channel-to-earth

[2] Peak voltage, channel-to-channel or

channel-to-earth

[3] Into analog bus. System errors are included

in the internal DMM measurement accuracy

specifications

[4] 50 Ω source, 50 Ω load, differential

measurements verified with 4-port network

analyzer (Sdd21)

[5] With in-rush resistors bypassed

[6] Limited to 6 W of channel resistance power

loss per module

[7] Speeds are for 4-1/2 digits, delay 0, display

off, autozero off, and within bank

[8] DC or peak AC current

[9] Ambient temperature < 30°C

[10] Includes temperature reference and

temperature gradient from reference to

screw terminal block. Measured under worst

case heat loading of the mainframe. For

remote mount of terminal card accuracy

consult factory.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 25 26

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