EVAL-ADP7158 Datasheet, PDF (6/8 Pages) Analog Devices – Evaluating the ADP7158 Ultralow Noise

UG-794
GROUND CURRENT MEASUREMENTS
VOLTAGE
SOURCE
–
+
EVAL-ADP7158 User Guide
AMMETER
0.004599
–
+
LOAD
Figure 7. Ground Current Measurement Setup for the ADP7158CP-3.3EVALZ
Figure 7 shows the connections to a voltage source and an
ammeter for ground current measurements for the ADP7158CP-
3.3EVALZ. Use a resistor as the load for the regulator. Ensure
the resistor has a power rating that can handle the power dissipated
across it. An electronic load can also be used as an alternative to
using a resistor load. Ensure the voltage source supplies enough
current for the expected load levels.
The steps on how to connect the ADP7158CP-3.3EVALZ to a
voltage source and an ammeter are as follows:
1. Connect the positive terminal of the voltage source to the
VIN pin on the evaluation board.
2. Connect the positive terminal of the ammeter to one of the
GND pins on the evaluation board.
3. Connect the negative terminal of the ammeter to the
negative terminal of the voltage source.
4. Connect a load between the evaluation board VOUT pin
and the negative terminal of the voltage source.
When these steps are completed, turn on the voltage source. If the
JP1 jumper is inserted (connecting the EN pin to the VIN pin
for automatic startup), the regulator powers up.
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