EVAL-ADP8860
Rev. 0 | Page 17 of 24
Kelvin Measurements
The input and output voltages are routed to Connector J1
(VIN_SENSE) and Connector J2 (VOUT_SENSE) using Kelvin
connections (the point of measurement is directly on the
capacitor pads). This minimizes the measurement error due to
the IR drop of the trace resistance. Table 2 and Table 3 show the
signals available on Connector J1 and Connector J2.
Table 2. Measurement Signals for J1
Signal Pin
No.
Description
VIN
1, 2, 3
ADP8860 supply input
VIN_SENSE
4
Kelvin measurement at VIN
nRST
6
Reset line to ADP8860
nINT
8
Interrupt line from ADP8860
SDA 10
I
2
C bidirectional line
SCL 12
I
2
C clock line
VDDIO
14
Logic level reference voltage
I_PHS1
16
External Phototransistor 1
I_PHS2
18
External Phototransistor 2
+VS
20
Phototransistors supply voltage
GND
5, 7, 9, 11, 13,
15, 17, 19
Ground
Table 3. Measurement Signals for J2
Signal Pin
No. Description
VOUT
1, 2, 4
Charge-pump output voltage
VOUT_SENSE
3
Kelvin measurement at VOUT
Sink 1
5
Output Sink 1
Sink 2
7
Output Sink 2
Sink 3
9
Output Sink 3
Sink 4
11
Output Sink 4
Sink 5
13
Output Sink 5
Sink 6
15
Output Sink 6
Sink 7
17, 19
Output Sink 7
GND
6, 8, 10, 12, 14,
16, 18, 20
Ground
Power Board from USB Port Only
To power the board via the USB without using an external
supply, short Jumper LK1 to Jumper LK3 on the motherboard
(USB position). Avoid exceeding the 500 mA current limit of
the USB.
