CN0186

Phase Coherent FSK Modulator

Schematic PCB

CN0185

New Analog/Analog Isolator Using Isolated Σ-Δ Modulator, Isolated DC/DC Converter and Active Filter

Schematic PCB

CN0146

Construct a low-cost programmable gain instrumentation amplifier circuit using the four-channel single-pole single-throw switch ADG1611 and the instrumentation amplifier AD620

Schematic PCB

Overcurrent monitor operates up to 26V

Using a current-sense amplifier, a high-side MOSFET driver, and a latching voltage monitor a circuit can be easily constructed that protects from overcurrent conditions and operates at voltages as high as 26V.

Complete solution for low-cost electrical equipment including 12V buck converter

The MAX5953A provides a simple and inexpensive, yet complete, nonisolated power solution for a powered device (PD) in a Power-over-Ethernet (PoE) system. The circuit provides the PD with detection and classification signatures in compliance with the IEEE^SM 802.3af standard, plus programmable inrush-current control, an integrated power switch, a PWM controller, and integrated high- and low-side switches. The buck step-down converter is capable of > 80% conversion efficiency while delivering 12V at 0.85A.

Optimize the load switching function of DS2715 battery charger

Integrating a battery-load switch function into a smart-charger IC greatly benefits low-cost applications. The DS2715 battery-charger IC intelligently senses battery loading after removal of the charge source to seamlessly maintain power to connected loads. This application note details examples of several application circuits that optimize the performance of the DS2715. Specifically, it presents a circuit for applications in which the DS2715 is connected to noncontinuous loads, and a circuit for powering the load directly from batteries.

5-channel (3 +V and 2 -V) hot-swap reference design

This article presents a five-channel hot-swap circuit that handles both positive and negative input voltages with sequential turn-on. The unique configuration allows two negative-voltage channels not protected by circuit breakers, in addition to three positive-voltage channels, to be controlled by a single MAX5927A positive-voltage hot-swap controller. The included test data verifies that the circuit meets the described load and power-sequencing requirements of the five channels.

1-Wire Bidirectional Level Translator (1.8V to 5V) Reference Design

Designers need open-drain logic to run at 1.8V at the 1-Wire master IO. Most 1-Wire slave devices cannot run at 1.8V. This application note presents an RD (reference design) of a circuit that translates from a 1.8V 1-Wire master to a 5V 1-Wire slave device. The RD is used for driving typical 1-Wire slave devices. The MAX3394E voltage-level translator is featured in the design.

OCEANSIDE (MAXREFDES9#): 3.3V to 15V input, ±15V (±12V) output, isolated power supply

This document details the Oceanside (MAXREFDES9#) subsystem reference design, a 3.3V to 15V input, ±15V (±12V) output, isolated power supply. The Oceanside design includes a high-efficiency step-up controller, a 36V H-bridge transformer driver for isolated supplies, a wide input range, and a pair of adjustable output low dropout (LDO) linear regulator. Test results and hardware files are included.

Schematic PCB

Lakewood (MAXREFDES7#): 3.3V input, ±12V (±15V) output isolated power supply

This document details the Lakewood (MAXREFDES7#) subsystem reference design, a 3.3V input, ±12V (±15V) output, isolated power supply. The Lakewood reference design includes a 3W primary-side transformer H-bridge driver for isolated supplies, and two wide input range and adjustable output low dropout (LDO) linear regulators. Test results and hardware files are included.

Schematic PCB

Isolated power supply with 3.3V input and 12V (15V) output

This document details the Riverside (MAXREFDES8#) subsystem reference design, a 3.3V input, 12V (15V) output isolated power supply. The Riverside reference design includes a 3W primary-side transformer H-bridge driver for isolated supplies, and one wide input range and adjustable output low dropout (LDO) linear regulator. Test results and hardware files are included.

Schematic PCB

Corona (MAXREFDES12#): Isolated, eight-channel, industrial digital input level translator/serializer

This document explains how the Corona (MAXREFDES12#) subsystem reference design provides a compact and simple isolated digital input interface for industrial control and automation applications. Hardware and firmware design files are provided.

Schematic PCB

SANTA CRUZ (MAXREFDES23#): IO-LINK light sensor

Maxim's Santa Cruz (MAXREFDES23#) reference design is the world's smallest IO-Link® light sensor compliant with IEC 61131-9. The Santa Cruz has six different types of sensors: ambient light (clear), red, green, blue, infrared, and is also a temperature sensor. The entire design fits onto a 6.5mm x 25mm printed circuit board (PCB).

Schematic PCB

MAXREFDES62#: RS-485 communication micro PLC card

The MAXREFDES62# reference design ushers in the era of Industry 4.0. With dual RS-485 communication channels for the next generation of ultra-small programmable logic controllers, this design meets the data rate and higher voltage needs of industrial control and industrial automation applications, while consuming minimal power and space. This high-performance system features one half-duplex RS-485 transceiver, one full-duplex RS-485 transceiver, a complete, efficient power-supply system and on-board processing. Hardware and firmware design files as well as results of lab measurements are provided.

MAXREFDES63#: 8-channel digital output micro PLC card

The MAXREFDES63# reference design ushers in the era of Industry 4.0. This design meets the higher voltage needs of industrial control and industrial automation applications, while consuming minimal power and space. This high-performance system features eight channels of digital outputs and a complete, efficient power-supply system. Hardware and firmware design files are provided.

MAXREFDES64#: 8-channel digital input micro PLC card

The MAXREFDES64# reference design ushers in the era of Industry 4.0. This design meets the higher voltage needs of industrial control and industrial automation applications while consuming minimal power and space. This high-performance system features eight channels of digital inputs and a complete, efficient power-supply system. Hardware and firmware design files are provided.

MAXREFDES79#: 4-port IO-LINK host

Maxim Integrated's MAXREFDES79# reference design is a fully compliant IO-Link version 1.1, 4-port IO-Link Master using a TEConcept software stack. The system contains four IO-Link master transceivers, a standard ARM® Cortex® M3 processor, and efficient industrial step-down DC-DC converters. The MAXREFDES79# comes preprogrammed and ready to connect with any compliant IO-Link device using a simple-to-use graphical user interface (GUI) program. Design files including schematic, PCB, BOM, GUI software, and compliance report are available for download.

Schematic PCB

MAXREFDES37#: IO-LINK four-channel servo driver

Maxim Integrated's MAXREFDES37# reference design is a fully IO-Link ver1.1 compliant, four-channel servo driver using a TMG TE IO-Link device stack. The system contains an IO-Link device transceiver, a low-power RL78 processor, and efficient industrial step-down DC-DC converter. The MAXREFDES37# comes preprogrammed and ready to connect with any compliant IO-Link master such as the MAXREFDES79# IO-Link master with a simple-to-use graphical user interface (GUI) program. Design files including schematic, PCB, BOM, and IODD firmware files are available for download.

Schematic PCB

MAXREFDES43#: I2C SHA-256 security authentication design

The MAXREFDES43# subsystem provides an I2C-based reference design for securing Xilinx FPGAs to protect IP and prevent attached peripheral counterfeiting. The system implements an I2C SHA-256 challenge-response between the FPGA and a DS28C22 secure authenticator with on-board memory. Boards for purchase, hardware, and firmware design files provide complete system information for rapid prototyping and development.

Schematic PCB

MAXREFDES44#: Safety-certified design with 1-WIRE ECDSA and XILINX ZYNQ SOC

The MAXREFDES44# subsystem provides a 1-Wire-based reference design for securing a Xilinx system-on-chip (SoC) to protect IP and prevent attached peripheral counterfeiting. The system implements a Public/Private Key 1-Wire ECDSA challenge-response between the SoC and a DS28E35 secure authenticator with on board memory. Boards for purchase, hardware, and firmware design files provide complete system information for rapid prototyping and development.

Schematic PCB