Datasheet

JUMPER SHUNT POSITION DESCRIPTION
JU1
1-2*
Connects the CS signal of the on-board microcontroller to the CS pin of IC U1.
2-3 Do not install.
Not installed
User-supplied CS. Apply an appropriate signal at header pin H1-1.
JU2
1-2*
Connects the SCLK signal of the on-board microcontroller to the CS pin of IC U1.
2-3 Do not install.
Not installed User-supplied SCLK. Apply an appropriate signal at header pin H1-3.
JU3
1-2 Do not install.
1-3* Connects the DIN signal of the on-board microcontroller to the DIN pin of IC U1.
1-4 Do not install.
JU4
1-2 Do not install.
1-3* Connects the DOUT signal of the on-board microcontroller to the DOUT pin of IC U1.
1-4 Do not install.
JU5
1-2
Connects the LDAC pin of IC U1 to VDDIO.
1-3*
Connects the LDAC signal of the on-board microcontroller to the LDAC pin of IC U1.
1-4
Connects the LDAC pin of IC U1 to GND.
JU6
Installed*
Connects the CLR signal of the on-board microcontroller to the CLR pin of IC U1.
Not installed
User-supplied CLR. Apply an appropriate signal at header pin H1-15.
JU7
Installed Do not install.
Not installed*
Disconnects pullup resistor R1 from the CS pin of IC U1.
JU8
Installed Do not install.
Not installed* Disconnects pullup resistor R2 from the SCLK pin of IC U1.
JU9
1-2* Connects the VDDIO pin of IC U1 to the on-board 3.3V supply.
2-3
Connects the VDDIO pin of IC U1 to a user-supplied power supply between 1.7V and 5.5V
(VDDIO_EXT).
JU10
1-2* Connects the VDD pin of IC U1 to the on-board +3.3V supply.
2-3
Connects the VDD pin of IC U1 to a user-supplied power supply between 2.7V and
5.5V (VDD_EXT).
JU11
1-2 User-supplied REF. The user must apply a voltage reference at the REF_EXT PCB pad.
2-3* Connects the on-board voltage reference IC (U7) to the REF pin of IC U1.
JU12
Installed*
Connects the M/Z pin of IC U1 to VDD.
Not installed
Connects the M/Z pin of IC U1 to 100kI pulldown resistor.
JU13
1-2* Powers IC U7 using the USB supply.
2-3 Powers IC U7 using the user-supplied power supply.
JU14
Installed* Connects additional bypass capacitor C36 on the REF pin of IC U1.
Not installed Disconnect additional bypass capacitor C36 on the REF pin of IC U1.
________________________________________________________________ Maxim Integrated Products 10
Evaluates: MAX5723/MAX5724/
MAX5725A/MAX5725B
MAX5725A Evaluation Kit
Table 1. Jumper Settings (JU1–JU14)
*Default position.