Analog Devices Inc. MAX14906 Industrial Digital Output/Digital Input
Analog Devices Inc. MAX14906 Industrial Digital Output/Digital Input is an IEC 61131-2 compliant, high-speed, four-channel industrial digital output digital input device. The device can be configured per channel as a high-side (HS) switch, push-pull (PP) driver, or a Type 1/3 or Type 2 digital input. The Analog Devices MAX14906 is specified for operation with a supply voltage of up to 40V and is tolerant to 65V. The high-side switch current limiting is settable from 130mA to 1.2A with an option for 2x load inrush current. The high-side driver on-resistance is 120mΩ (typical) at a +25°C ambient temperature. The optional push-pull operation allows for the high-speed driving of cables and fast discharge of load capacitance. Current sinks for 2.3mA (Type 1 and 3) or 7mA (Type 2) are provided for digital input operation.
The SPI interface has a built-in chip addressing decoder, allowing communication with multiple MAX14906 devices utilizing a shared SPI with a standard chip select active-low CS. The SPI interface provides flexibility for global and per-channel configuration and diagnostics, including supply over- and under-voltage detection, wire-break or open-wire detection, thermal overload, current limit reporting, and more. For high-speed operation, the digital input and output states can be monitored and changed directly using pins for increased system speed and throughput.
Open-wire detection monitors open-wire/open-load conditions with switches in the off state. LED drivers indicate a per-channel fault, status, and supply under-voltage conditions. Internal active clamps allow for a fast turn-off of inductive loads. Integrated line-to-ground and line-to-line surge protection only requires a TVS on VDD. The Analog Devices MAX14906 is available in a compact 48-pin 7mm x 7mm QFN package.
Features
- Per-channel configurability enables a wide range of applications
- High-side (HS) switch or push-pull (PP) driver digital output
- Software-selectable type 1 and 3, or type 2 digital input
- Current limit settable from 130mA to 1.2A
- Serial (SPI) or direct operation using pins
- Independent channel powering
- Fault-tolerant with built-in diagnostics
- Per-channel diagnostics
- Integrated voltage supply monitoring and short-to-VDD detection
- Open-wire/-load detection
- Thermal shutdown protection
- Watchdog timer
- 5-bit CRC code generation and checking for SPI error detection
- High integration reduces BOM count and PCB space
- Integrated LDO compatible with 5V logic devices
- Internal active clamps for fast inductive load turn-off
- 0.6μs (typical) DO and 1μs (typical) DI propagation delays
- Addressable SPI
- 7mm x 7mm TQFN package
- Reduced power and heat dissipation
- Low RDSON for high-side switches, 120mΩ (typical)
- Accurate output current limiting
- Accurate input current sinks, Type 1 and 3, or Type 2
- Robust design
- 10V to 40V operating supply range, 65V tolerant
- SafeDemag™ allows fast turn-off of unlimited inductance
- ±16kV air-gap ESD and ±8kV contact ESD
- ±1kV surge tolerant using TVS protection on VDD to GND
- -40°C to +125°C operating temperature range
Applications
- Industrial digital output and input module
- Configurable digital input/output
- Motor control
- PLC systems
- Distributed Control Systems (DCS)
Videos
Functional Diagram
Related Development Tools
Analog Devices Inc. MAX14906EVKIT Sensor Evaluation Kit
Designed to evaluate the MAX14906, a four-channel industrial digital-output, digital-input device.
Analog Devices Inc. AD-SWIOT1L-SL Evaluation & Development Platform
Offers a complete solution for prototyping intelligent, secure, network-capable field devices.