The MAX34417 is a specialized current and voltage monitor used to determine power consumption of portable systems. The device has a very wide dynamic range (20,000:1) that allows for the accurate measurement of power in such systems. The device is configured and monitored with a standard I2C/SMBus serial interface. The unidirectional current sensor offers precision high-side operation with a low full-scale sense voltage. The device automatically collects the current-sense and voltage samples and then multiplies those values to obtain a power value it then accumulates. Upon a command from the host, the device transfers the accumulated power samples, as well as the accumulation count, to a set of registers accessible by the host. This transfer occurs without missing a sample and allows the host to retrieve the data not in real-time, but at any time interval. Watch video: Introducing the MAX34417 Evaluation KitApplicationsServersSmartphonesTabletsUltra Notebooks

The MAX35101 is a time-to-digital converter with built-inamplifier and comparator targeted as a complete analogfront-end (AFE) solution for the ultrasonic heat meter andflow meter markets.With a time measurement accuracy of 20ps and automaticdifferential time-of-flight (TOF) measurement, thisdevice makes for simplified computation of liquid flow.Early edge detection ensures measurements are madewith consistent wave patterns to greatly improve accuracyand eliminate erroneous measurements.Multihit capability with stop-enable windowing allowsthe device to be fine-tuned for the application. Internalanalog switches, an autozero amplifier/comparator, real-timeclock (RTC), and programmable receiver sensitivityprovide the analog interface and control for a minimalelectrical bill of material solution. The RTC provides anevent timing mode that is configurable and runs cyclicalgorithms to minimize microprocessor interactivity andincrease battery life.Built-in arithmetic logic unit provides TOF difference measurements.A programmable receiver hit accumulator canbe utilized to minimize the host microprocessor accessand thus minimize current consumption.For temperature measurement, the MAX35101 supportsup to four (4) 2-wire PT1000/500 platinum resistive temperaturedetectors (RTD).A simple 4-wire SPI interface allows any microcontrollerto effectively configure the device for its intendedmeasurement.On-board 8KB user flash allows the MAX35101 to benonvolatile-configurable and provide nonvolatile energyuse data to be logged. Configuration can be recalled anytimewith a SPI command. ApplicationsUltrasonic Gas MetersUltrasonic Heat MetersUltrasonic Water Meters

The MAX40200 is an ideal diode current-switch that drops so little voltage that it approaches an order of magnitude better than Schottky diodes.When forward-biased and enabled, the MAX40200 conducts with as little as 85mV of voltage drop while carrying currents as high as 1A. Typical voltage drop is 43mV at 500mA, with the voltage drop increasing linearly at higher currents. The MAX40200 thermally protects itself, and any downstream circuitry, from overtemperature conditions.When disabled (EN = low) the MAX40200 blocks voltages up to 6V in either direction, making it suitable for most low-voltage, portable electronic devices. The MAX40200 operates from a supply voltage of 1.5V to 5.5V.The MAX40200 is available in a tiny, 0.73mm X 0.73mm, 4-bump wafer-level package (WLP), with a 0.35mm bump pitch and only 0.5mm high and 5-pin SOT-23 package. The MAX40200 operates over the extended -40°C to +125°C temperature range.Design Solution: Cut Your Losses—With an Ideal Diode ›Design Solution: Design a Cooler, Safer Smart-Home Hub—Using an Ideal Diode ›How to Add a Diode ORing or Battery Backup Circuit Using the MAX40200 Ideal DiodeApplicationsCellular PhonesElectronic ToysNotebook and Tablet ComputersPortable Media PlayersPortable/Wearable Medical DevicesUSB-Powered Peripherals

The DS1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator.Interfacing the DS1302 with a microprocessor is simplified by using synchronous serial communication. Only three wires are required to communicate with the clock/RAM: CE, I/O (data line), and SCLK (serial clock). Data can betransferred to and from the clock/RAM 1 byte at a time or in a burst of up to 31 bytes. The DS1302 is designed to operate on very low power and retain data and clock information on less than 1µW.The DS1302 is the successor to the DS1202. In addition to the basic timekeeping functions of the DS1202, the DS1302 has the additional features of dual power pins for primary and backup power supplies, programmable trickle charger for VCC1, and seven additional bytes of scratchpad memory.

The DS1803 addressable dual digital potentiometer features two independently controlled 256-positionpotentiometers. Device control is achieved through a 2-wire serial interface. Three address pins allow upto 8 DS1803's to share the same 2-wire interface. The exact wiper position of each potentiometer can bewritten or read. The DS1803 is available in a 16-pin DIP, 16-pin SO, and 14-pin TSSOP package. Thedevice is available in three standard resistance values: 10kΩ, 50kΩ, and 100kΩ and is specified over theindustrial temperature range.

The DS1807 consists of two addressable potentiometers having a logarithmic resistor characteristic over the device range. Each potentiometer provides 64 wiper positions with a 1dB-per-step resolution. The device also provides greater than 90dB of attenuation in the mute position. Zero-crossing detection is a primary feature of the DS1807 allowing for pop-free wiper transitions. Wiper positions are read and controlled via a 2-wire interface, which allows up to 8 devices to be controlled on the same 2-wire bus.The DS1802 provides high-performance audio volume and tone control with processor addressability. It replaces mechanical potentiometers with digital accuracy and reliability while its low-power circuits consume very little current.

The MAX1968/MAX1969 are highly integrated and cost-effective, high-efficiency, switch-mode drivers for Peltier thermoelectric cooler (TEC) modules. Both devices utilize direct current control to eliminate current surges in the TEC. On-chip FETs minimize external components while providing high efficiency. A 500kHz/1MHz switching frequency and a unique ripple cancellation scheme reduce component size and noise.The MAX1968 operates from a single supply and provides bipolar ±3A output by biasing the TEC between the outputs of two synchronous buck regulators. Bipolar operation allows for temperature control without 'dead zones' or other nonlinearities at low load currents. This arrangement ensures that the control system does not hunt when the set point is very close to the natural operating point, requiring a small amount of heating or cooling. An analog control signal precisely sets the TEC current. The MAX1969 provides unipolar output up to 6A. Reliability is optimized with settable limits for bothTEC voltage and current, with independently set limits for heating and cooling current. An analog output also monitors TEC current.The MAX1968/MAX1969 are available in a low-profile 28-pin TSSOP-EP package and is specified over the -40°C to +85°C temperature range. The thermally-enhanced TSSOP-EP package with exposed metal pad minimizes operating junction temperature. An evaluation kit is available to speed designs.ApplicationsAutomated Test Equipment (ATE)Biotech Lab EquipmentEDFA Optical AmplifiersFiber Optic Network EquipmentFiber-Optic Laser ModulesTelecom Fiber InterfacesWDM, DWDM Laser Diode Temperature Control

The MAX3311/MAX3313 are low-power, +5V EIA/TIA-232-compatible transceivers. Both devices have one transmitter and one receiver. The transceivers have a proprietary low-dropout transmitter output stage enabling RS-232-compatible operation from a +5V supply with a single inverting charge pump. These devices require only three 0.1µF capacitors and will run at data rates up to 460kbps while maintaining RS-232-compatible output levels.The MAX3311 features a 1µA shutdown mode. In shutdown the device turns off the charge pump, pulls V- to ground, and the transmitter output is disabled. The MAX3313 features an active-low INVALID output that asserts high when an active RS-232 cable signal is connected, signaling to the host that a peripheral is connected to the communication port.ApplicationsCell PhonesDigital Still CamerasDigital Television (Receivers, Set-Top Boxes)Global Positioning Systems (GPS)ModemsPagersPen Entry PalmtopsPoint-of-Sale Terminals

The MAX1602 DC power-switching IC contains a network of low-resistance MOSFET switches that deliver selectable VCC and VPP voltages to a single CardBus or PC Card host socket. Key features include low-resistance switches, small packaging, soft-switching action, and compliance with PCMCIA specifications for 3V/5V switching. 3.3V-only power switching for fast, 32-bit CardBus applications is supported in two ways: low-resistance 3.3V switches allow high 3.3V load currents (up to 1A); and completely independent internal charge pumps let the 3.3V switch operate normally, even if the +5V and +12V supplies are disconnected or turned off to conserve power. The internal charge pumps are regulating types that draw reduced input current when the VCC switches are static. Power consumption is automatically reduced to 11µA max when the outputs are high-Z or GND.Other key features include guaranteed specifications for output current limit level, and guaranteed specifications for output rise/fall times (in compliance with PCMCIA specifications). Reliability is enhanced by thermal-overload protection, accurate current limiting, an overcurrent-fault flag output, and undervoltage lock-outs. The CMOS/TTL-logic interface is flexible, and can tolerate logic input levels in excess of the positive supply rail.The MAX1602 fits a complete CardBus/PCMCIA switch into a space-saving, 16-pin QSOP package.ApplicationsData LoggingDocking StationsHandy TerminalsPCMCIA Read/Write Drives

The MAX5403/MAX5404/MAX5405 is a family of duallinear taper digital potentiometers. Each device has one3-terminal potentiometer and one 2-terminal variableresistor (Figure 1). The MAX5403/MAX5404/MAX5405operate from +2.7V to +5.5V single-supply voltagesand use an ultra-low supply current of 0.1µA. Thesedevices also provide glitchless switching betweenresistors taps as well as a convenient power-on reset(POR) that sets the wiper to the midscale position atpower-up. The potentiometer consists of a fixed resistorwith a wiper contact that is digitally controlled through a3-wire serial interface and has 256-tap points. It performsthe same function as a discrete potentiometer orvariable resistor.These parts are ideal for applications requiring digitallycontrolled resistors. Three resistance values are available:10kΩ (MAX5403), 50kΩ (MAX5404), and 100kΩ(MAX5405). A nominal resistor-temperature coefficientof 35ppm/°C end-to-end and 5ppm/°C ratiometric makethe MAX5403/MAX5404/MAX5405 ideal for applicationsrequiring low temperature-coefficient variable resistors,such as adjustable-gain circuit configurations.The MAX5403/MAX5404/MAX5405 are available in a 10-pin µMAX® package. Each device is guaranteed over theextended industrial temperature range (-40°C to +85°C).ApplicationsAdjustable Voltage ReferenceImpedance MatchingLCD Screen AdjustmentLow-Drift Programmable Gain Amplifier (PGA)Mechanical Potentiometer ReplacementProgrammable Filters, Delays, Time ConstantVolume Control