Analog Devices Inc./Maxim Integrated

The MAX20091 is a 35-channel automotive contact monitor for automotive applications. Ten contact monitor inputs can be used with either ground- or battery-connected switches; the other 25 inputs are for use with ground-connected switches.The IC operates over a 5.5V to 28V voltage range and withstands voltages up to 42V. It protects low-voltage circuitry from high voltages and reverse-battery conditions. The IC’s low-current operation under all operating conditions makes it suitable for use in electronic control units (ECUs) that are connected directly to the automotive battery. The IC has an adjustable scan mode that reduces the current drawn in key-off while maintaining polling capability.The IC features an SPI interface to monitor the switch status and set the device configuration. An interrupt output allows the device to wake a local microcontroller when a switch status change is detected. In addition, a switch status change turns on the internal regulator.The MAX20091 is available in a compact 48-pin TQFN package and operates over the -40°C to +125°C temperature range.ApplicationsAutomotive Body ComputersDoor ModulesSmart Junction Boxes

The MAX20092 12-switch matrix manager IC for automotive lighting applications includes a 12-switch array for bypassing individual LEDs in a single- or dual-string application. It features 12 individually controlled n-channel MOSFET switches rated for 10V with on-resistance of 0.100Ω. A single current source can be used to power all the LEDs connected in series. Individual LEDs can be dimmed by turning on and off the bypass switches across each LED, and can also be configured in 2 strings with 6 switches in series per string and 4 strings with 3 switches per string. A separate current source powers each string. Each switch can be connected across 1 or 2 LEDs in series. The IC also includes an internal charge pump that provides power for the gate drive of each of the LED bypass switches. The low on-resistance of the switches minimizes conduction loss and power dissipation.The IC features a serial peripheral interface (SPI) for serial communication. The MAX20092 is a slave device that uses the SPI to communicate with an external microcontroller (µC), which is the master device. Each of the 12 switches can be independently programmed to bypass the LEDs across each of the switches in the string. Each switch can be turned fully on, fully off, or dimmed with or without fade-transition mode. The PWM frequency can be set by an internal oscillator or set to an external clock source. The IC features open-LED protection as well as open- and short-LED fault reporting through the SPI. The MAX20092 is available in a 32-pin (5mm x 5mm) side-wettable TQFN (SWTQFN) package with a thermally enhanced exposed pad.ApplicationsAutomotive Front-Light SystemsAutomotive Matrix-Lighting SystemsAutomotive Tail-Light Systems

The MAX20098 is an automotive 2.2MHz synchronous step-down controller IC with 3.5µA IQ. This IC operates with an input-voltage supply from 3.5V to 42V and can operate in dropout condition by running at 99% duty cycle. It is intended for applications with mid- to high-power requirements that operate at a wide input voltage range such as during automotive cold-crank or engine stop-start conditions.The step-down controller operates at up to 2.2MHz frequency to allow small external components, reduced output ripple, and to guarantee no AM band interference. The switching frequency is resistor adjustable (220kHz to 2.2MHz). FSYNC input programmability enables three frequency modes for optimized performance: forced fixed-frequency operation, skip mode with ultra-low quiescent current, and synchronization to an external clock. The IC also provides a SYNC output to enable two controllers to operate in parallel. The IC has a factory-programmable spread-spectrum option for frequency modulation to minimize EMI interference.The PGOOD output indicates when the voltage is within regulation range. Protection features include cycle-by-cycle current limit and thermal shutdown. The MAX20098 is specified for operation over the -40°C to +125°C automotive temperature range.ApplicationsGeneral-Purpose Point-of-Load (POL)Infotainment SystemsUSB Hub

The MAX2015 complete multistage logarithmic amplifier is designed to accurately convert radio-frequency (RF) signal power in the 0.1GHz to 3GHz frequency range to an equivalent DC voltage. The outstanding dynamic range and precision over temperature of this log amplifier make it particularly useful for a variety of base station and other wireless applications, including automatic gain control (AGC), transmitter power measurements, and received signal strength indication (RSSI) for terminal devices.The MAX2015 can also be operated in a controller mode where it measures, compares, and controls the output power of a variable-gain amplifier as part of a fully integrated AGC loop.This logarithmic amplifier provides much wider measurement range and superior accuracy compared to controllers based on diode detectors, while achieving excellent temperature stability over the full -40°C to +85°C operating range.ApplicationsAGC Measurement and ControlCellular Base Station, WLAN, Microwave Link, Radar, and other Military ApplicationsRF Transmitter Power MeasurementRSSI Measurements

The MAX2010 adjustable RF predistorter is designed to improve power amplifier (PA) adjacent-channel power rejection (ACPR) by introducing gain and phase expansion in a PA chain to compensate for the PA's gain and phase compression. With its +23dBm maximum input power level and wide adjustable range, the MAX2010 can provide up to 12dB of ACPR improvement for power amplifiers operating in the 500MHz to 1100MHz frequency band. Higher frequencies of operation can be achieved with this IC's counterpart, the MAX2009.The MAX2010 is unique in that it provides up to 6dB of gain expansion and 21° of phase expansion as the input power is increased. The amount of expansion is configurable through two independent sets of control: one set adjusts the gain expansion breakpoint and slope, while the second set controls the same parameters for phase. With these settings in place, the linearization circuit can be run in either a static set-and-forget mode, or a more sophisticated closed-loop implementation can be employed with real-time software-controlled distortion correction. Hybrid correction modes are also possible using simple lookup tables to compensate for factors such as PA temperature drift or PA loading.The MAX2010 comes in a 28-pin thin QFN exposed pad (EP) package (5mm x 5mm) and is specified for the extended (-40°C to +85°C) temperature range.Applicationscdma2000®, GSM/EDGE, and iDEN® Base StationsDigital Baseband Predistortion ArchitecturesFeed-Forward PA ArchitecturesMilitary Applications