Datasheet

MAX5392 Evaluation System
Evaluates: MAX5387/MAX5392
10 _____________________________________________________________________________________
MAX5392 U3 VDD Input Configuration
Jumper JU10 selects the power source for U3 VDD input.
Install a shunt across pins 1-2 of JU10 to operate the
MAX5392 extended VDD input power-supply rail to 1.7V.
Install a shunt across pins 2-3 to operate the MAX5392M
VDD input from the VPOWER rail. See Table 5 for proper
jumper configuration for U3 VDD power-supply input.
MAX5392 U4 VDD Input Configuration
Jumper JU22 selects the power source for U4 VDD
input. Install a shunt across pins 1-2 of JU22 to connect
U4 VDD to U3 VDD input voltage. Install a shunt across
pins 2-3 to operate the U4 VDD input from the VPOWER
rail. See Table 6 for proper JU22 configuration.
Address Selection for the MAX5392 (U3)
The EV kit circuit features three jumpers that pull the
MAX5392 (U3) A2, A1, and A0 address pins to VDD or
GND to set the MAX5392 slave address. See Table 7 for
jumpers JU15 (A2), JU16 (A1), and JU17 (A0) settings to
set the U3 slave address.
Note: The first 7 bits shown are the address. The Y bit
in Table 7 is the I
2
C read/write bit. The I
2
C protocol
states that this bit is a 1 for a read operation or a 0 for a
write operation. The Y bit is always set to 0 (write only)
because these digital potentiometers do not transmit
data to the master device.
Table 5. MAX5392 U3 VDD Input (JU10, JU2, JU1)
Table 7. Device Address Configuration (JU15, JU16, JU17)
Table 6. MAX5392 U4 VDD Power Source (JU22)
*Default position.
X = Don’t care.
Note: If U2 or U4 is installed on the EV kit, the U3 device address should not be set to 0x52 or 0x5A, respectively.
SHUNT POSITION U4 VDD POWER SOURCE U4 VDD PIN
1-2 Connected to U3 VDD power source Connected to U3 VDD (see Table 5)
2-3 Dependent on jumper JU1 configuration See Table 3
SHUNT POSITION MAX5392 ADDRESS
JU15 JU16 JU17 BINARY HEXADECIMAL
2-3 2-3 2-3 0101 000Y 0x50
2-3 2-3 1-2 0101 001Y 0x52
2-3 1-2 2-3 0101 010Y 0x54
2-3 1-2 1-2 0101 011Y 0x56
1-2 2-3 2-3 0101 100Y 0x58
1-2 2-3 1-2 0101 101Y 0x5A
1-2 1-2 2-3 0101 110Y 0x5C
1-2 1-2 1-2 0101 111Y 0x5E
SHUNT POSITION
U3 VDD PIN
JU10 JU2 JU1
1-2*
Installed* X 1.7V
Not installed X Not powered
2-3 X
1-2 5V
1-3 3.3V
1-4 2.6V
Not installed External source applied at the EV kit VDD and GND PCB pads