EVAL-ADP7159 Datasheet, PDF (7/9 Pages) Analog Devices – Power supply rejection ratio

EVAL-ADP7159 User Guide
GROUND CURRENT MEASUREMENTS
VOLTAGE
SOURCE
–
+
UG-811
AMMETER
0.004599
–
+
LOAD
Figure 10. Ground Current Measurement Setup, ADP7159CP-04-EVALZ (10-Lead LFCSP)
VOLTAGE
SOURCE
–
+
AMMETER
0.004599
–
+
LOAD
Figure 11. Ground Current Measurement Setup, ADP7159RD-04-EVALZ (8-Lead SOIC)
Figure 10 andFigure 11 showthe connectionsto a voltage
source and an ammeter for ground current measurementsfor
the ADP7159CP-04-EVALZ and ADP7159RD-04-EVALZ. 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 canalso be usedasan alternative to using a resistor
load. Ensure the voltage source suppliesenough current for the
expected load levels.
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 complete,turn onthe voltage source.If the
JP1 jumper is inserted (connecting the EN pin to the VIN pin
for automatic startup), the regulator powers up.
The steps on how to connect either of the ADP7159CP-04-
EVALZ and ADP7159RD-04-EVALZ to a voltage source and an
ammeterare as follows:
1. Connect the positive terminal 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.
Rev. 0 | Page 7 of 9