MAX5432EVKIT+ Maxim Integrated Products, MAX5432EVKIT+ Datasheet - Page 7

• Manufacturer Part Number: MAX5432EVKIT+
• Description: KIT EVAL FOR MAX5432
• Manufacturer: Maxim Integrated Products

Specifications of MAX5432EVKIT+

• Main Purpose: Digital Potentiometer
• Utilized Ic / Part: MAX5432
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The MAX5432 EV kit is an assembled and tested PCB
that evaluates the MAX5432 linear digital potentiometer.
The MAX5432 has an end-to-end resistance of 50kΩ and
the wiper can be programmed among 32 tap positions.
The MAX5432 features an internal nonvolatile memory
(EEPROM) used to store the wiper position for initializa-
tion during power-up. The on-board I
al interface can communicate at rates up to 400kbps to
program the MAX5432.
The EV kit uses a MAX5432 IC in an 8-pin TDFN pack-
age on a proven 2-layer PCB design. The MAX5432 EV
kit provides two options to power the MAX5432 IC. It can
operate from the 3.3V supply generated from the USB
interface circuit, or from a user-supplied 2.7V to 5.25V
external DC power supply. The MAX1840 logic level
translators (U7, U8) provide proper I
tion when using a 2.7V to 5.25V external power supply.
The MAX5432 EV kit can be powered by an external
2.7V to 5.25V DC power supply. The EV kit can still be
programmed through the USB interface using the soft-
ware GUI. To connect the EV kit to an external power
supply, disconnect the USB cable and install a shunt
on pins 2-3 of jumper JU1. Turn off the power supply
and connect the power-supply ground terminal to the
Table 2. JU1 Jumper Functions (VDD)
*Default position.
Table 4. JU4 Jumper Functions (A0)
*Default position.
POSITION
SHUNT POSITION
SHUNT
Detailed Description of Hardware
Open
1-2*
2-3
Not installed
Not installed
Installed*
Installed
CONNECTED TO
Not connected
VDD PIN
Using an External DC Power Supply
3.3V
VIN
_______________________________________________________________________________________
VDD (through resistor R12)
VDD (through resistor R12)
A0 PIN CONNECTED TO
Do not use (EV kit will not be
External power supply (2.7V
EV KIT POWERED FROM
Jumper Selection
USB interface circuit
2
2
GND
GND
C-compatible seri-
C-interface opera-
powered)
to 5.25V)
MAX5432 Evaluation Kit
EV kit GND pad; connect the power-supply positive ter-
minal to the VIN pad. Table 2 lists the various options
for powering the MAX5432 EV kit.
The MAX5432 features clock and data input pins for
I
wiper position. The clock and data input pins are driven
by the on-board USB interface circuit or the PCB pads,
along with the user-supplied external I
controller. An external I
connected to the SCL, SDA, and GND pads to commu-
nicate with the MAX5432 IC.
Jumpers JU2 and JU3 select the I
signal-control sources for the MAX5432 IC. Table 3 lists the
various options for configuring I
The MAX5432 EV kit circuit features a jumper that pulls
the MAX5432 A0 address pin to VDD or GND to set the
slave address. Table 4 shows four possible slave
addresses for the MAX5432. The first 4 bits (MSBs) of
the slave addresses are always 0101. Bits A2 and A1 are
factory programmed (refer to the MAX5432/MAX5433 IC
data sheet). Connect the A0 input to either GND or VDD
to select the I
using multiple devices, each device must have a unique
address to share the I
devices can concurrently share the same bus.
Table 3. JU2 and JU3 Jumper Functions
(SCL, SDA)
*Default position.
2
POSITION
Installed*
C-compatible communication to control the MAX5432
installed
010100A
010100A
010110A
010110A
SHUNT
BINARY
Not
0
0
0
0
Y
Y
Y
Y
ADDRESS
CONTROL SIGNALS
USB interface circuit
2
CONNECTED TO
C device address for the MAX5432. When
I
2
C INTERFACE
PCB pads
0x5A
0x50
0x52
0x58
HEX
2
C-compatible controller can be
2
C bus. A maximum of four
I
2
C Clock and Data Inputs
2
Address Selection (A0)
C input signal controls.
USB interface circuit and
User-supplied external
I
CONTROLLED BY
2
2
C interface signals
MAX5432META or
I
MAX5432LETA or
C serial-interface
2
EV kit software
C INTERFACE
MAX5433META
MAX5433LETA
SIGNALS
2
C-compatible
PART
7