The MAX22520 24V line driver for industrial sensors incorporates a one-time programmable (OTP) analog interface for signal conditioning of binary switching sensors. Sensor calibration and configuration settings can be permanently programmed with the inline data interface using one-time programming (OTP). Additionally, an accurate integrated linear regulator provides a programmable (3.3V or 5V) low-noise supply for analog signal sensing circuitry.
The driver output (DO) is configurable using the Maxim® 1-Wire® protocol and an OTP interface to permanently operate in a normally-open or normally-closed state and in a high-side (PNP), low-side (NPN), or push-pull configuration. The maximum driver load current can be programmed to 100mA (min) or 200mA (min).
Configuration and OTP programming are done using VCC, DO, and GND. This use of the standard three-wire interface pins simplifies programming at the end-of-line, when the sensor is already in its final housing.
The MAX22520 also features a programmable comparator, PWM oscillator, and digital potentiometer. These integrated functions further support sensor calibration for analog sensing circuitry. Additionally, an on-board LED driver provides visual feedback of the logic state of the sensor DO output.
Robust protection enables the MAX22520 to function in harsh industrial environments. DO, V
CC, and GND are all protected against hot-plug events, ±1kV/500Ω surge events, reverse-polarity, short circuits, and ESD strikes.
The MAX22520 operates from a wide 4.75V/8V to 36V supply and is available in a 20-bump wafer-level package (WLP) (2mm x 2.5mm, 0.5mm pitch). The device operates over the -40°C to +105°C temperature range.
Applications
- Industrial Binary Sensors
- Proximity Switches
- Inductive and Magnetic Sensors
