Analog Devices ADP121 Evaluation Board ADP121CB-1.8-EVALZ ADP121CB-1.8-EVALZ Fiche De Données
Codes de produits
ADP121CB-1.8-EVALZ
EVAL-ADP121
Rev. A | Page 4 of 8
MEASURING OUTPUT VOLTAGE
GND
GND
ANALOG DEVICES
ADP121-xx-EVALZ
ADP121-xx-EVALZ
VOUT
GND
C2
C1
U1
VIN
GND
EN
J1
VOLTAGE SOURCE
07
140
-00
3
VOLTMETER
LOAD
+
–
+
–
Figure 5. Output Voltage Measurement, TSOT
07
14
0-
01
5
VOLTMETER
+
–
+
–
VOLTAGE SOURCE
LOAD
Figure 6. Output Voltage Measurement, WLCSP
Figure 5 and Figure 6 show how the evaluation board can be
connected to a voltage source and a voltmeter for basic output
voltage accuracy measurements. A resistor can be used as the
load for the regulator. Ensure that the resistor has a power
rating adequate to handle the power expected to be dissipated
across it. An electronic load can also be used as an alternative.
Ensure that the voltage source can supply enough current for
the expected load levels.
connected to a voltage source and a voltmeter for basic output
voltage accuracy measurements. A resistor can be used as the
load for the regulator. Ensure that the resistor has a power
rating adequate to handle the power expected to be dissipated
across it. An electronic load can also be used as an alternative.
Ensure that the voltage source can supply enough current for
the expected load levels.
Use the following steps to connect to a voltage source and
voltmeter:
voltmeter:
1. Connect the negative terminal (−) of the voltage source to
one of the GND pads on the evaluation board.
2. Connect the positive terminal (+) of the voltage source to
the VIN pad of the evaluation board.
3. Connect a load between the VOUT pad and one of the
GND pads.
4. Connect the negative terminal (−) of the voltmeter to one
of the GND pads.
5. Connect the positive terminal (+) of the voltmeter to the
VOUT pad.
The voltage source can now be turned on. If J1 or J2 is inserted
(connecting EN to VIN for automatic startup), the regulator
powers up.
(connecting EN to VIN for automatic startup), the regulator
powers up.
If the load current is large, the user needs to connect the
voltmeter as close as possible to the output capacitor to
reduce the effects of IR drops.
voltmeter as close as possible to the output capacitor to
reduce the effects of IR drops.