MAXIM Manuals

The MAX1482 and MAX1483 are low-power transceivers for RS-485 and RS-422 communication. Both feature slew-rate-limited drivers that minimize EMI and reduce reflections caused by improperly terminated cables. Data rates are guaranteed up to 250kbps. The MAX1482/MAX1483 draw only 20µA of supply current. Additionally, they have a low-current shutdown mode that consumes only 0.1µA. Both parts operate from a single +5V supply. Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit. The MAX1482 is full duplex and the MAX1483 is half duplex. Both parts have a 1⁄8-unit-load input impedance that guarantees up to 256 transceivers on the bus.

MAX4249-MAX4257 are low-noise, low-distortion operational amplifiers with wide supply voltage range (2.4 V), large output swing (near supply voltage), and low power consumption (400 μA). These features make them ideal for mobile and battery-powered applications that require low distortion and/or low noise.

The MAX9503 is a low-power, high-gain video amplifier that filters and amplifies standard-definition video signals. The MAX9503 internally integrates a reconstruction filter to smooth the DAC output video signal steps and spikes. The MAX9503 uses Maxim's DirectDrive technology, which uses an integrated charge pump and a linear regulator to generate a clean negative power supply to drive the sync below ground. The MAX9503 provides +6dB and +12dB gain options. The device operates from a 2.7V to 3.6V single supply and features a 10nA low-power shutdown mode. The MAX9503 is offered in space-saving 16-pin QSOP and 16-pin TQFN packages and is specified over the -40°C to +85°C extended temperature range.

The MAX1492/MAX1494 are low-power, 3.5- and 4.5-digit analog-to-digital converters (ADCs) with integrated liquid crystal display (LCD) drivers that operate from a single 2.7V to 5.25V power supply. They include an internal reference, a high-accuracy on-chip oscillator, and a triplexed LCD driver. An internal charge pump generates the negative supply needed for single-supply operation. The ADC can be configured for either a ±2V or ±200mV input range and outputs its conversion results to an LCD and/or to a microcontroller (µC). µC communication is facilitated through an SPI™-/QSPI™-/MICROWIRE™-compatible serial interface. The MAX1492 is a 3.5-digit (±1999 count) device, and the MAX1494 is a 4.5-digit (±19,999 count) device. The MAX1492/MAX1494 do not require external precision integrating capacitors, autozero capacitors, crystal oscillators, charge pumps, or other circuitry required with dual-slope ADCs commonly used in panel meter circuits. These devices also feature on-chip buffers for the differential signal and reference inputs, allowing direct interface with high-impedance signal sources. In addition, they use continuous internal-offset calibration and offer >100dB simultaneous rejection of 50Hz and 60Hz line noise. Other features include data hold and peak hold, overrange and underrange detection, and a low-battery monitor.

The DS1803 is a dual digital potentiometer from MAXIM that features two independently controlled 256-position potentiometers. Device control is achieved through a 2-wire serial interface. Three address pins allow up to 8 DS1803s to share the same 2-wire interface. The exact wiper position of each potentiometer can be written or read. The DS1803 is available in a 16-pin DIP, 16-pin SO, and 14-pin TSSOP package. The device is available in three standard resistance values: 10kΩ, 50kΩ, and 100kΩ and is specified over the industrial temperature range.

The DS3065W is a combination of static RAM and nonvolatile controller, with a year 2000-compliant real-time clock and an internal rechargeable manganese lithium battery. It has a 256-ball BGA footprint and internal rechargeable function. When powered by an external power source, it can recharge the manganese lithium battery, power the clock and SRAM, and allow modification of the clock registers or SRAM contents. When the external power is powered down or out-of-tolerance, the controller write-protects the memory contents and powers the clock and SRAM from the battery. The DS3065W also contains a power-supply monitor output and a user-programmable interrupt output.

This document introduces the evaluation system of MAX1454 circuit, including master board and evaluation board. The evaluation system can be expanded to 15 positions.

This document provides a detailed introduction to the iButton Starter Kit, including its appearance, uses, and usage methods.

The MAX66040 is a secure memory that complies with the ISO/IEC 14443 Type B standard. It combines 1024 bits of user EEPROM, SHA-1 challenge-and-response authentication, a 64-bit unique identifier (UID), and a 13.56MHz RF interface. The memory is organized into 16 blocks of 8 bytes, with one block for the secret key and two blocks for data and control registers. The integrated SHA-1 engine provides a message authentication code (MAC) using data from the EEPROM and the 64-bit secret key, ensuring secure symmetric authentication for reading and writing to the device. Memory protection features include write protection and EPROM emulation, which can be set for each individual memory page.

This manual provides a detailed description of the features and characteristics of the MAX31782 battery monitor. The manual includes an overview of the battery monitor, architecture, system register descriptions, peripheral register modules, interrupts, analog-to-digital converter (ADC), I2C-compatible slave interface, and I2C-compatible master interface.

This issue of Electronic Engineering Times includes: News Brief, In-Depth, Precision Timing, Using USB to Charge Batteries, Design Idea, Using a Digital Potentiometer for Voltage-to-Resistance Conversion, Building a Charge Pump Using GPIO Expanders to Drive a Blue LED, and Using the High-Power USB Port to Charge a Single 2100mAh NiMH Battery.

This article introduces Maxim's sensor products, including temperature sensors, light sensors, and acceleration sensors. The application scenarios and system diagrams of sensors are also introduced.

The MAX11835 is an efficient, high-voltage, TacTouch™ haptic actuator controller with I2C interface. It provides a complete solution to drive actuators to add haptic feedback to products featuring user-touch interfaces.

MAX5977A evaluation board is a hot swap controller board to control the turn on of large power and large capacitance loads to avoid spikes in the power supply. The evaluation circuit uses MAX5977A fault-locked, 20-pin TQFN surface-mount package (with bare solder pads) hot swap controller IC. The evaluation board operates in the 1V to 16V input power range, and the power is connected to the VIN and GND connectors. The IC controls two n-channel MOSFETs, and provides up to 40A of output current. The evaluation board circuit ensures that the output voltage is stable and within the undervoltage (UV) and overvoltage (OV) threshold range. The circuit continuously monitors the load current to ensure that it does not exceed the programmable fast and slow current limiting thresholds. The evaluation board provides a buffered output for the IC's current sensing amplifier, including a precision current source. When the IC calibration mode function is enabled, a 2.5V output is provided. By replacing U1, the evaluation board can also be used to evaluate the MAX5977B auto-retry hot swap controller.