Agilent 44727A

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The HP 44727A (as well as the 44727B and 44727C)  is one of the 4-channel Voltage/Current DAC plug-in accessories for the 3852A mainframe.

The 44727A has all four channels configured for voltage outputs. Each channel has remote sense capability for accurate outputs at the test point. The channels can float up to 170 volts peak above ground.

The 44727A consists of a component module and a terminal module. The component module contains both analog and digital sections. The digital section consists of a local controller to interface with the backplane and channel drivers. The analog section is identical for each channel and consists of error amplifiers, sense amplifiers, output buffers, and potentiometers for calibration. The terminal module contains jumpers to configure and calibrate the output channels. The module also contains terminal strips for user connections and calibration resistors for current.

An important feature of the 44727A is monotonicity, which guarantees that the output will never change in a direction other than that programmed. For example, if a voltage channel is set for 5 mV output and then programmed for a 10 mV output, the actual output will never be less than 5 mV.

Because the 44727A consumes a relatively large amount of power, a limited number of accessories can be installed in the 3852A.

• Channels 0-3: Voltage output
• Maximum number of DACs: four per mainframe or extender
• Voltage ranges: 0 to +10.235 V, -10.235 to +10.235 V
• Resolution: 2.5 mV
• Protection: 170 Vpeak or 120 Vdc channel to channel or channel to chassis
• Maximum output current: ≤20 mA
• Load regulation: <0.6 mV
• Max IR drop allowed for source leads: <1.5 V
• Ripple and noise: <2.5 mVrms
• Maximum wire size: 16 AWG