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Switch Modules
DAQM900A DAQM901A DAQM902A DAQM903A DAQM904A DAQM905A DAQM908A
General
Number of channels 20 20 + 2 16 20 (SPDT) 4x8 (2 wire) Dual 1x4(50
ohm)
40 (1 wire)
Scanning speed 450 Ch/s 80 ch/s 250 ch/s 100 ch/s
Open/close speed 120 ch/s 120 ch/s 120 Ch/s 120 ch/s 60 ch/s 70 ch/s
Internal DMM measurement functions supported
Voltage AC/DC Yes
3, 4
Yes Yes No No No Yes
Current AC/DC No Yes No No No No No
Frequency/period Yes Yes Yes No No No Yes
Ohms - 2 wire Yes
2
Yes Yes
5
No No No Yes
Ohms - 4 wire Yes
2
Yes Yes
5
No No No No
Thermocouple Yes Yes Yes No No No No
RTD 2-wire No Yes Yes No No No Yes
RTD 4-wire No Yes Yes No No No No
Thermistor No Yes Yes No No No Yes
Capacitance No Yes Yes No No No Yes
Characteristics - typical: Input
Max voltage (dc, ac rms) 120V 300V 300 V 300 V 300 V 42 V 300 V
Max current (dc, ac rms) .02 A 1 A 50 mA 1 A 1 A .7 A 1 A
Power (W, VA) 2.4 W
50 W 2 W 50 W 50 W 50 W 50 W
Characteristics - typical: DC
Offset voltage
(incremental to DMM specs)
< 4 uV 0 uV
7
< 4 uV < 1 uV < 1 uV < 4 uV < 1 uV
Offset resistance (4-wire)
(incremental to the DMM specs)
< 4 mΩ 0 mΩ
7
< 4 mΩ
Initial closed channel R < 50 ohms < 1.0 ohms < 1.0 ohms < 0.2 ohms < 1.0 ohms < .5 ohms < 1.0 ohms
Isolation Ch-Ch, Ch-Earth > 10 G ohm > 10 G ohm > 10 G ohm > 10 G ohm > 10 G ohm > 1 G ohm > 10 G ohm
Characteristics - typical: AC
Ch-Ch crosstalk (@ 1 Mhz) NA - 50 db - 55 db - 60db - 50 db -110 db - 25 db
Capacitance (Hi-Lo) NA < 50 pF < 65 pF 10 pF < 50 pF < 20 pF < 50 pF
Capacitance (Lo-Earth) NA < 150 pF < 135 pF < 80 pF < 80 pF NA < 80 pF
Volt-Hertz limit 10^8 10^8 10^8 10^8 10^8 10^10 10^8
Characteristics - typical: Other
T/C CRJ accuracy
Switch life (no load) Unlimited within
FET Banks
6
100 M 100 M 100 M 100 M 5 M 100 M
Switch life (rated load) Unlimited within
FET Banks
6
100 K 100 K 100 K 100 K 100 K 100 K
DAQM905A: Characteristics - Nominal
10 MHz 100 MHz 500 MHz 1 GHz 1.5 GHz 2 GHz
AC
Insertion loss (db) -0.1 -0.4 -0.6 -1 -1.2 -3
SWR 1.02 1.05 1.2 1.2 1.3 1.4
1. DMM accuracy assumes measurement with DAQM901A. For 900 module Ohms measurements - see note 2.
2. The series resistance of the DAQM900A limits the use of the 100 ohm and 1kohm resistance range. The precision of 2 W ohms is limited by this on resistance. Keysight
recommends the use of 4-wire ohms for these 2 ranges. Maximum resistance range of DAQM900A is 1 Mohm The 10M ohm and above ranges are not specified on this
module.
3. For AC Volts - The input impedance of this module decreases with frequency. A source impedance of 5 ohms or less will maintain specifications over the full frequency range.
A source impedance of 50 ohms or less will maintain specifications to 5 KHz.
4. For DC Volts - Additional settling time may be needed for short integration time and higher source impedance.
5. Resistancerange≥1MΩisTypical
6. This module has an Armature backplane & 2 W/4 W relays with 100 M operational life (FET life within banks is unlimited). Limiting backplane & 2 W/4 W relay cycling is
recommended.
7. Absolute Offset is <2uV. Incremental Offset to 901 = 0 uV. 2uV included in DCV’s % of range specs.
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