MAX14916 no-OS Example Project

See projects/max14916 (doxygen) for the Doxygen documentation.

Supported Evaluation Boards

Overview

The MAX14916 is a compact industrial octal high-side switch with integrated diagnostics. Each of the eight channels features an on-resistance of only 120 mOhm (typ) and handles up to 1.1 A of continuous current. Two adjacent channels can be combined to form four 2.4 A switches. The device is controlled via SPI with built-in chip addressing for up to four devices on a common chip select.

The SPI interface provides per-channel configuration and diagnostics including undervoltage detection, open-wire detection (in both on and off states), overload and current limiting reporting, and thermal shutdown protection. Integrated surge protection (IEC61000-4-5) requires only a single external TVS on VDD. The device operates from -40 C to +125 C and is available in a compact 48-pin 6 mm x 6 mm QFN package.

Applications

  • Industrial digital outputs

  • PLC systems

Hardware Specifications

Power Supply Requirements

  • Absolute maximum VDD: 65 V

  • Supply current: 2 mA (typ)

  • On-resistance: 250 mOhm (max) at 125 C ambient

  • Logic voltage interface: 2.5 V to 5.5 V

No-OS Supported Examples

The initialization data used in the examples is taken out from the Project Common Data Path.

The macros used in Common Data are defined in platform specific files found in the Project Platform Configuration Path.

Basic example

The basic example initializes the MAX14916 device via SPI and demonstrates LED control by cycling the status LEDs on each channel. It also configures device parameters such as the flash LED time, watchdog timer, open-wire OFF current source, and short-to-VDD threshold, then reads back the configuration registers for verification.

IIO example

The IIO example initializes the MAX14916 device and configures the IIO application descriptor with output channels, enabling users to interact with the device using IIO-based tools.

If you are not familiar with ADI IIO Application, please take a look at: IIO No-OS

If you are not familiar with ADI IIO Oscilloscope Client, please take a look at: IIO Oscilloscope

No-OS Supported Platforms

Maxim

Used Hardware

Connections

The MAX14916EVKIT communicates via SPI. Connect the SPI signals (SCLK, SDI, SDO, CS) and GND between the MAX14916EVKIT and the target microcontroller board.

SPI Parameter

AD-APARD32690-SL

MAX32666FTHR

SPI Device ID

4

1

SPI Chip Select

0

0

SPI Baudrate

100000

100000

Build Command

For toolchain setup and prerequisites, see the Maxim CMake build guide.

Available variants: basic, iio_example. Available boards: ad-apard32690-sl, max32666fthr. Replace --variant / --board accordingly.

# point at the Maxim SDK libraries (only if not auto-detected)
export MAXIM_LIBRARIES=</path/to/MaximSDK/Libraries>
# Windows (PowerShell): $env:MAXIM_LIBRARIES = "C:\MaximSDK\Libraries"

cd no-OS

# build the project (basic example on the ad-apard32690-sl board)
python tools/scripts/no_os_build.py build \
   --project max14916 --variant basic --board ad-apard32690-sl

# build and flash (requires a connected debug probe)
python tools/scripts/no_os_build.py build \
   --project max14916 --variant basic --board ad-apard32690-sl \
   --probe openocd --flash

Linux

Used Hardware

Build Command

For the make-based build flow and prerequisites, see the No-OS Build Guide.

In order to build the basic example, make sure you have the following configuration in the Makefile:

# Select the example you want to enable by choosing y for enabling and n for disabling
BASIC_EXAMPLE = y
IIO_EXAMPLE = n

In order to build the IIO example, make sure you have the following configuration in the Makefile:

# Select the example you want to enable by choosing y for enabling and n for disabling
BASIC_EXAMPLE = n
IIO_EXAMPLE = y

# to delete current build
make reset
# to build the project
make PLATFORM=linux
# to flash the code
make run