Datasheet

03 | Keysight | N2820A/21A High-Sensitivity, High Dynamic Range Current Probes - Data Sheet
This N2820A current probe comes with two parallel amplifiers
possessing different gain settings. The low gain side allows you to
see the entire waveform (or the ‘zoomed out’ view) and the high
gain amplifier provides a ‘zoomed in’ view.
The precision sense resistor is positioned in the interchangeable
Rsense head that is plugged into the probe body. The probe body
can be found at the same location as the differential amplifier.
On the ‘user-defined’ sense head, there is no resistor, which
allows the probe to be used with the user’s sense resistor on the
target. The user will need to enter the sense resistor value into
the scope.
The supplied Make-Before-Break (MBB) connectors allow you to
quickly probe multiple locations on your DUT without having to
solder or unsolder the leads. The MBB header may be mounted
on the user’s target board. It fits into standard 0.1” spacing
for 0.025” square pins. Users should plan their PCB layouts
accordingly. The MBB can be used with all sense resistor probe
heads including the user-defined probe head. The MBBs are
a great way to easily connect and disconnect across multiple
locations on the target board without interrupting the circuit
under test.
Figure 3. Probing with the MBB connector.
Figure 2. Types of sense resistor heads.
– 500 mW
– 250 μA to 5 A
– ± 1% tolerance
– For s maller voltage drop
or lower burden on your
circuit
– Order N2822A for
replacement head
20 mΩ
– 500 mW
– 50 μA to 2.2 A
– ± 1% tolerance
– For higher sensitivity,
bandwidth and lower
noise
– Order N2824A for
replacement head
100 mΩ
– Use your own sense R on
your target
– Choose between 1 mΩ to
1 MΩ
– Check the resistor power
rating (P = I
2
R)
– Order N2825A for
replacement head
User-defined
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