MAXIM Manuals (Others)

The DS28EA00 is a digital thermometer with 9-bit (0.5°C) to 12-bit (1/16°C) resolution and alarm function with nonvolatile (NV), user-programmable upper and lower trigger points. Each DS28EA00 has its unique 64-bit registration number that is factory-programmed into the chip. Data is transferred serially through the 1-Wire protocol, which requires only one data line and a ground for communication. The improved 1-Wire front end with hysteresis and glitch filter enables the DS28EA00 to perform reliably in large 1-Wire networks. Unlike other 1-Wire thermometers, the DS28EA00 has two additional pins to implement a sequence detect function. This feature allows the user to discover the registration numbers according to the physical device location in a chain, e.g., to measure the temperature in a storage tower at different height. If the sequence detect function is not needed, these pins can be used as general-purpose input or output. The DS28EA00 can derive the power for its operation directly from the data line (“parasite power”), eliminating the need for an external power supply.

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The MAX5033 is an easy-to-use, high-efficiency, high-voltage, step-down DC-DC converter that operates from an input voltage up to 76V and consumes only 270µA quiescent current at no load. It operates as a pulse-width modulated (PWM) converter at a fixed 125kHz switching frequency under heavy loads, and automatically switches to pulse-skipping mode to provide low quiescent current and high efficiency under light loads. The MAX5033 includes internal frequency compensation to simplify circuit implementation. It utilizes an internal low-on-resistance, high-voltage, DMOS transistor to achieve high efficiency and reduce overall system cost. The device incorporates undervoltage lockout, cycle-by-cycle current limit, hiccup-mode output short-circuit protection, and thermal shutdown. The MAX5033 can deliver up to 500mA output current, which may be limited by the package's maximum power dissipation capability. It features external shutdown with a 10µA (typical) shutdown current. The MAX5033A/B/C versions have fixed output voltages of 3.3V, 5V, and 12V, respectively, while the MAX5033D features an adjustable output voltage ranging from 1.25V to 13.2V. The MAX5033 is available in space-saving 8-pin SO and 8-pin plastic DIP packages and operates over the automotive (-40°C to +125°C) temperature range.

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The MAX253 is a monolithic oscillator/power-driver, specifically designed to provide isolated power for an isolated RS-485 or RS-232 data interface. It drives a center-tapped transformer primary from a 5V or 3.3V DC power supply. The secondary can be wound to provide any isolated voltage needed at power levels up to 1W. The MAX253 consists of a CMOS oscillator driving a pair of N-channel power switches. The oscillator runs at double the output frequency, driving a toggle flip-flop to ensure 50% duty cycle to each of the switches. Internal delays are arranged to ensure break-before-make action between the two switches. The SD pin puts the entire device into a low-power shutdown state, disabling both the power switches and oscillator.

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This document introduces the features and characteristics of the DS1844 quad digital potentiometer, including four independent, digitally controlled 64-position potentiometers, two interface control options, standard resistance values, mixed resistor value combinations, and operating temperature range.

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MAX1811 USB powered Li+ charger

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The MAX9505 is a low-power integrated audio/video decoder that filters and amplifies standard-definition video signals.

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The MAX536/MAX537 combine four 12-bit voltage-output digital-to-analog converters (DACs) and four precision output amplifiers in a space-saving 16-pin package. Offset, gain, and linearity are factory calibrated to provide the MAX536’s ±1LSB total unadjusted error. The MAX537 operates with ±5V supplies, while the MAX536 uses -5V and +12V to +15V supplies. Each DAC has a double-buffered input, organized as an input register followed by a DAC register. A 16-bit serial word is used to load data into each input/DAC register. The serial interface is compatible with either SPI/QSPI™ or Microwire™, and allows the input and DAC registers to be updated independently or simultaneously with a single software command. The DAC registers can be simultaneously updated with a hardware LDAC pin. All logic inputs are TTL/CMOS compatible.

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The MAX5820 is a dual, 8-bit voltage-output, digital-to-analog converter (DAC) with an I2C-compatible, 2-wire interface that operates at clock rates up to 400kHz. It operates from a single 2.7V to 5.5V supply (115µA at VDD = 3.6V). The device features three software-selectable power-down output impedances: 100kΩ, 1kΩ, and high impedance. Other features include internal precision rail-to-rail output buffers and a power-on reset (POR) circuit that powers up the DAC in the 100kΩ power-down mode. The MAX5820 features a double-buffered I2C-compatible serial interface that allows multiple devices to share a single bus. All logic inputs are CMOS-logic compatible and buffered with Schmitt triggers, allowing direct interfacing to optocoupled and transformer-isolated interfaces. It minimizes digital noise feedthrough by disconnecting the clock (SCL) signal from the rest of the device when an address mismatch is detected. The MAX5820 is specified over the extended (-40°C to +85°C) temperature range and is available in a small 8-pin µMAX® package. Refer to the MAX5822 data sheet for the 12-bit version and to the MAX5821 data sheet for a 10-bit version.

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The MAX202E–MAX213E, MAX232E/MAX241E line drivers/receivers are designed for RS-232 and V.28 communications in harsh environments. Each transmitter output and receiver input is protected against ±15kV electrostatic discharge (ESD) shocks, without latchup.

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The MAX1226/MAX1228/MAX1230 are serial 12-bit analog-to-digital converters (ADCs) with an internal reference and an internal temperature sensor. These devices feature on-chip FIFO, scan mode, internal clock mode, internal averaging, and AutoShutdown™. The maximum sampling rate is 300ksps using an external clock. The MAX1230 has 16 input channels, the MAX1228 has 12 input channels, and the MAX1226 has 8 input channels. All input channels are configurable for single-ended or differential inputs in unipolar or bipolar mode. All three devices operate from a +5V supply and contain a 10MHz SPI™/QSPI™/MICROWIRE™-compatible serial port. The MAX1230 is available in 28-pin 5mm x 5mm thin QFN with exposed pad and 24-pin QSOP packages. The MAX1226/MAX1228 are only available in QSOP packages. All three devices are specified over the extended -40°C to +85°C temperature range.

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The DS2480 is a universal, common-ground serial port to 1-Wire line driver for MicroLAN applications. It works with all iButtons™ and MicroLAN-compatible 1-Wire slave devices, and communicates at regular and Overdrive 1-Wire speed and serial port data rates of 9600 (default), 19200, 57600 and 115200 bps. It also supports 12V EPROM programming and stiff 5V pull-up for Crypto iButton, sensors and EEPROM.

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This data sheet details the features and functions of the MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E +3.0V powered EIA/TIA-232 and V.28/V.24 communication interface devices. These devices feature low power consumption, high data rates, and enhanced electrostatic discharge (ESD) protection.

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The MAX4358 is a 32 ✕ 16 highly integrated video crosspoint switch matrix with input and output buffers and On-Screen Display (OSD) Insertion. This device operates from dual ±3V to ±5V supplies or from a sin- gle +5V supply. Digital logic is supplied from an inde- pendent single +2.7V to +5.5V supply. Individual outputs can be switched between an input video signal source and OSD information through an internal, dedi- cated fast 2:1 mux (40ns switching times) located before the output buffer. All inputs and outputs are buffered, with all outputs able to drive standard 75Ω reverse-terminated video loads. The switch matrix configuration and output buffer gain are programmed through an SPI/QSPI™-compatible, three-wire serial interface and initialized with a single update signal. The unique serial interface operates in two modes facilitating both fast updates and initializa- tion. On power-up, all outputs are initialized in the dis- abled state to avoid output conflicts in large-array configurations. Superior flexibility, high integration, and space-saving packaging make this nonblocking switch matrix ideal for routing video signals in security and video-on- demand systems. The MAX4358 is available in a 144-pin TQFP package and specified over an extended -40°C to +85°C tem- perature range. The MAX4358 evaluation kit is available to speed designs.

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The MAX7219/MAX7221 are compact, serial input/output common-cathode display drivers that interface microprocessors (µPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph displays, or 64 individual LEDs.

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The MAX11504/MAX11505 integrated filters offer four channels of 5th order filters for standard-definition video and include +6dB output buffers on each channel. These video filters are ideal for anti-aliasing and DAC smoothing in applications such as set-top boxes, security systems, digital video recorders (DVRs), DVD players, and personal video recorders. The MAX11504/MAX11505 video inputs feature a transparent clamp compatible with AC- and DC-coupled input signals and allow DAC outputs to be directly coupled. The 5th order filters provide a bandwidth of 8.6MHz (typical). The MAX11504 offers a flat passband response on all channels. The MAX11505 offers a 0.8dB peaking passband response on Channel 1, resulting in a bandwidth of 8.9MHz (typical) and a flat passband response on all other channels. Each channel includes an output buffer with a gain of +6dB capable of driving a full 2VP-P video signal into two standard 150Ω (75Ω back terminated) video loads. The buffers drive either AC- or DC-coupled loads and assure a blanking level below 1V after the back-match resistor. The MAX11504/MAX11505 operate from a single +5V supply and are available in the 0°C to +70°C commercial temperature range. These devices are available in small 10-pin µMAX® packages.

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The MAX5100 is a parallel-input, voltage-output, quad 8-bit digital-to-analog converter (DAC) that operates from a single +2.7V to +5.5V supply. It comes in a space-saving 20-pin TSSOP package. The internal precision buffers swing Rail-to-Rail®, and the reference input range includes both ground and the positive rail. All four DACs share a common reference input. The MAX5100 features double-buffered logic inputs, with four 8-bit buffer registers followed by four 8-bit DAC registers. This ensures that the DAC outputs do not change during the write operation. An asynchronous control pin, LDAC, allows for simultaneous updating of the DAC registers. The MAX5100 also includes a shutdown mode that reduces current to 1nA and a power-on reset mode that resets all registers to code 00 hex on power-up. Applications for the MAX5100 include digital gain and offset adjustments, programmable attenuators, portable instruments, and power-amplifier bias control.

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The DS1631, DS1631A, and DS1731 digital thermometers provide 9, 10, 11, or 12-bit temperature readings over a -55°C to +125°C range. The DS1631 and DS1631A thermometer accuracy is �0.5°C from 0°C to +70°C with 3.0V � VDD � 5.5V, and the DS1731 accuracy is �1°C from -10°C to +85°C with 3.0V � VDD � 5.5V. The thermostat on all three devices provides custom hysteresis with user-defined trip points (TH and TL).

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The DS2482-100 is an I2C to 1-Wire bridge device that interfaces directly to standard (100kHz max) or fast (400kHz max) I2C masters to perform bidirectional protocol conversion between the I2C master and any downstream 1-Wire slave devices.

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The MAX941/MAX942/MAX944 are single/dual/quad high-speed comparators optimized for systems powered from a 3V or 5V supply. These devices combine high speed, low power, and rail-to-rail inputs. Propagation delay is 80ns, while supply current is only 350µA per comparator. The input common-mode range of the MAX941/ MAX942/MAX944 extends beyond both power-supply rails. The outputs pull to within 0.4V of either supply rail without external pullup circuitry, making these devices ideal for interface with both CMOS and TTL logic. All input and output pins can tolerate a continuous short- circuit fault condition to either rail. Internal hysteresis ensures clean output switching, even with slow-moving input signals. The MAX941 features latch enable and device shutdown. The single MAX941 and dual MAX942 are offered in a tiny µMAX package. Both the single and dual MAX942 are available in 8-pin DIP and SO packages. The quad MAX944 comes in 14-pin DIP and narrow SO packages.

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This document introduces the MAXIM DS2782 battery monitor chip, which can measure battery voltage, temperature and current, and estimate available capacity.

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