Specifications

71
The APS power supplies feature
advanced and fast protection capa-
bilities fully integrated including:
• Fast CC/CV mode crossover as
well as user-settable voltage and
current priority modes to reduce
unwanted voltage or current
overshoots
• Smart triggering
• Over- and under-voltage and
current protection
• Fast reaction to error conditions
• Output disconnect relays
• User-configurable watchdog timer
• Brokenandshortedsense
line detection
Generate voltage and current transients
DUTs that are operated in rugged
environments, such as automotive
electronics and avionics, can often
experience transient behavior from
the power source, such as voltage
dropouts or surges. To ensure your
DUT can stand up to these real-
world transients, you must simulate
worst-case power transient condi-
tions in the test process. The APS
power supplies provide three dif-
ferent functionalities for simulating
either voltage or current transients
for testing:
Step: One-time event that steps
the output voltage or current up
or down in response to a triggered
event.
Arbitrary waveforms: An arbitrary
waveform generator (arb) allows you
to generate complex user-defined
voltage or current waveforms of up
to 65,535 data points.
Single Output: 1 & 2 KW GPIB, LAN (LXI Core), USB
(Continued)
Specifications
(at 0° to 55°C unless
otherwise specified)
More detailed specifications at www.agilent.com/find/N7900
Advanced Power System DC power supplies overcome the toughest power test challenges
N7950A N7951A N7952A N7953A N7954A
Supplemental Characteristics (Non-warranted characteristics determined by design
that are useful in applying the product)
Output-on delay time
Voltage priority 12 ms 12 ms 12 ms 12 ms 12 ms
Voltage priority (with relay on) 38 ms 38 ms 38 ms 38 ms 38 ms
Current priority 14 ms 14 ms 14 ms 14 ms 14 ms
Current priority (with relay on) 46 ms 46 ms 46 ms 46 ms 46 ms
Line regulation
8
Voltage <10 µV <10 µV <10 µV <10 µV <10 µV
Current <10 µA <10 µA <10 µA <10 µA <10 µA
Small signal bandwidth
Voltage programming
9
DC to 1 kHz (-1dB); DC to 2 kHz (-3dB)
Current programming
10
DC to 70 Hz (-1dB); DC to 120 Hz (-3dB)
Voltage measurement DC to 14 kHz (-1dB); DC to 25 kHz (-3dB)
Current measurement DC to 14 kHz (-1dB); DC to 25 kHz (-3dB)
Notes:
8
Line regulation is guaranteed by design
9
With High Bandwidth setting, resistive load condition
10
With resistive load condition
List: A list can consist of up to
512 steps. Each step in the list can
have a unique dwell time associated
with it, which specifies the time in
seconds that the list will remain at
that step before moving on to the
next step. Lists can also be trigger-
paced, in which case the list advances
one step for each trigger received.
To demonstrate the APS’s arb capa-
bility an example “interrupt” pulse
was generated with the N7951A
into a resistive load.
The captured interrupt pulse
(figure 4) goes from 20 V to 2 V
for 10 ms and then returns to 20 V.
The measured fall time of the pulse
(figure 5) was less than 200 µs.
Figure 4. Voltage interrupt pulse
Figure 5. Pulse fall time of < 200 us