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34924A Datasheet(PDF) 10 Page - Agilent(Hewlett-Packard) |
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34924A Datasheet(HTML) 10 Page - Agilent(Hewlett-Packard) |
10 / 32 page 10 Table 3. Multiplexer selection table—specifications and characteristics 34921A 34922A 34923A 34924A 34925A Channels/configurations 402-wire 702-wire 801-wire 702-wire 801-wire 20 4-wire 35 4-wire 40 2-wire 35 4-wire 40 2-wire 4-current 20 4-wire 20 4-wire 1.5 A Fused Switch type Armature Armature Reed Reed Optically latching latching isolated FET Input characteristics (per channel) Max volts ± 300 V [1] ± 300 V [1] ± 150 V peak [2] ± 150 V peak [2] ± 80 V peak [2] Maxcurrent(DC,ACRMS) Switch current 1 A 1 A 0.5 A [5]/ 0.05 A [11] 0.5 A [5]/ 0.05 A [11] 0.02 A [8] Carry current 2 A 2 A 1.5 A [5]/ 0.05 A [11] 1.5 A [5]/ 0.05 A [11] Power (W, VA) [6] 60 W 60 W 10 W 10 W 1.6 W Volt-Hertz limit 108 108 108 108 107 Initial closed channel res [3][12] <1.5Ω <1.5Ω < 1.5 Ω [5]/200 Ω[11] < 1.5 Ω [5]/200 Ω[11] <700Ω nominal nominal General specifications Offset voltage [3] < 3 uV < 3 uV < 50 uV < 50 uV < 3 uV < 100 uV 1-wire DCIsolation(ch-ch,ch-earth) >10GΩ >10GΩ >10GΩ >10GΩ >10GΩ Leakagecurrent[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 Bandwidthatterminalblock[4] 45 MHz 25 MHz 45 MHz [5]/4 MHz 25 MHz [5]/4 MHz[11] 1 MHz 10 MHz 1-wire Crosstalk at terminal block (ch-ch) [4] 300kHz -75dB -75dB -75dB -75dB Notrecommendedfor RFsignalswitching 1MHz -75dB -75dB -75dB -70dB 20MHz -50dB -50dB -50dB -45dB 45MHz -40dB -40dB Capacitance at terminal block HI-LO 150pF 250pF 130pF 200pF 100pF LO–earth 150pF 200pF 120pF 170pF 300pF(600pF1-wire) [1] DCorACRMSvoltage,channel-to-channelorchannel-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] 50Ωsource,50Ωload,differentialmeasurementsverifiedwith4-portnetworkanalyzer(Sdd21) [5] Withinputresistorsbypassed.Bypassingresistorswillreducelifetimeofrelays.Seetheratedloadrelaylifecharacteristics. [6] Limitedto6Wofchannelresistancepowerlosspermodule [7] Speedsarefor2-wireohmsorDCV,41/ 2 digits, delay 0, display off, autozero off, and within bank [8] DC or peak AC current [9] Ambient temperature < 30°C [10] Includes 0.5°C temperature reference sensor and 0.5°C terminal block isothermal gradient error, measured under worst case loading of the mainframe; see User’s Guide for information on supported external reference sensors [11]Withinputprotectionresistors:2x100Ω±5%; 0.5W; TC=±200ppm/°C.Theseriesresistanceofthe34923/24/25limitstheuseofthe100Ωrange. [12]Channelresistanceistypically<1.5Ωbutcangoashighas50Ωwhenachannelisusedinmeasurementapplicationswith<10mAloadcurrent.Increased relay channel resistance for measurements with load currents below 10 mA can occur on cards that have been out of service or following relay inactivity for peri- ods of greater than 1 week. Switching relays for 2K cycles prior to use may reduce the variation in channel resistance. Applies to the 34921A and 34922A. Agilent recommendstheuseof4-wireOhmsforresistancemeasurements.Forhighaccuracyvoltagemeasurements,selecttheDMMinputresistancesettingof>10G ohms to minimize the impact of relay contact resistance. |
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