Analog Devices

TheADM3202/ ADM3222 /ADM1385are high speed, 2-channel RS232/V.28 interface devices which operate from a single +3.3 V power supply. Low power consumption and a shutdown facility (ADM3222 / ADM1385) makes them ideal for battery powered portable instruments.The ADM3202 / ADM3222 / ADM1385 conform to the EIA-232E and CCITT V.28 specifications and operate at data rates up to 230 kbps. Four external 0.1 µF charge pump capacitors are used for the voltage doubler/inverter permitting operation from a single +3.3 V supply.The ADM3222 / ADM1385 contain additional enable and shutdown circuitry. TheENinput may be used to three-state the receiver outputs. TheSDinput is used to power down the charge pump and transmitter outputs reducing the quiescent current to less than 1 µA. The receivers remain enabled during shutdown unless disabled usingEN.The ADM3202 is available in a 16-lead DIP, narrow and wide SO as well as a space saving TSSOP package. The ADM3222 is available in 18 lead DIP , SO and in 20 lead SSOP and TSSOP. The ADM1385 is available in a 20 lead SSOP package and is pin compatible with the LTC1385 CG.

The ADM3232E transceiver is a high speed, 2-channel RS-232/V.28 interface device that operates from a single 3.3 V power supply. Low power consumption makes it ideal for battery-powered portable instruments. The ADM3232E conforms to the EIA-232E and CCITT V.28 specifications and operates at data rates up to 460 kbps.All RS-232 (TxOUTand RxIN) and TTL/CMOS (TxINand RxOUT) inputs and outputs are protected against electrostatic discharges (up to ±15 kV ESD protection). This ensures compliance with IEC 1000-4-2 requirements.This device is ideally suited for operation in electrically harsh environments or where RS-232 cables are frequently plugged/ unplugged, with the ±15 kV ESD protection of the ADM3232E input/output pins.Emissions are also controlled to within very strict limits. CMOS technology is used to keep the power dissipation to an absolute minimum, allowing maximum battery life in portable applications.Four external 0.1 μF charge pump capacitors are used for the voltage doubler/inverter, permitting operation from a single 3.3 V supply.The ADM3232E is available in a 16-lead narrow SOIC package, as well as a space-saving 16-lead TSSOP.APPLICATIONSGeneral-purpose RS-232 data linkPortable instrumentsHandsetsIndustrial/telecom diagnostic ports

The ADM3251E is a high speed, 2.5 kV fully isolated, single- channel RS-232/V.28 transceiver device that operates from a single 5 V power supply. Due to the high ESD protection on the RINand TOUTpins, the device is ideally suited for operation in electrically harsh environments or where RS-232 cables are frequently being plugged and unplugged.The ADM3251E incorporates dual-channel digital isolators withisoPower™ integrated, isolated power. There is no requirement to use a separate isolated dc-to-dc converter. Chip-scale transformeriCoupler®technology from Analog Devices, Inc., is used both for the isolation of the logic signals as well as for the integrated dc-to-dc converter. The result is a total isolation solution.The ADM3251E containsisoPower technology that uses high frequency switching elements to transfer power through the transformer. Special care must be taken during printed circuit board (PCB) layout to meet emissions standards. Refer to Application Note AN-0971,Control of Radiated Emissions withisoPower Devices, for details on board layout considerations. The ADM3251E conforms to the EIA/TIA-232E and ITU-T V. 28 specifications and operates at data rates up to 460 kbps. Four external 0.1 μF charge pump capacitors are used for the voltage doubler/inverter, permitting operation from a single 5 V supply.The ADM3251E is available in a 20-lead, wide body SOIC package and is specified over the −40°C to +85°C temperature range.ApplicationsHigh noise data communicationsIndustrial communicationsGeneral-purpose RS-232 data linksIndustrial/telecommunications diagnostic portsMedical equipment

Based on theiCoupler®andisoPower®chip scale transformer technology, the ADM3260 is a hot swappable digital and power isolator with two nonlatching, bidirectional communication channels, supporting a complete isolated I2C interface, and an integrated isolated dc-to-dc converter, supporting up to 150 mW of isolated power conversion.iCoupler is a chip scale transformer technology with functional, performance, size, and power consumption advantages as compared to optocouplers. The bidirectional I2C channels eliminate the need for splitting I2C signals into separate transmit and receive signals for use with standalone optocouplers.Based on the Analog Devices, Inc.,isoPower technology, the on-chip isolated dc-to-dc converter provides a regulated, isolated voltage of 3.15 V to 5.25 V with up to 150 mW of output power.With the ADM3260, theiCoupler andisoPower channels, along with the I2C transceivers, can be integrated with semiconductor circuitry, which enables a complete isolated I2C interface and allows the power converter to be implemented in a small form factor. The ADM3260 is available in 20-lead SSOP package and has an operating temperature range of −40°C to+105°C.isoPower uses high frequency switching elements to transfer power through its transformer. Special care must be taken during printed circuit board (PCB) layout to meet emissions standards. See the AN-0971 Application Note for board layout recommendationsApplicationsIsolated I2C, SMBus, and PMBus interfacesMultilevel I2C interfacesCentral office switchingTelecommunication and data communication equipment−48 V distributed power systems−48 V power supply modulesNetworking

Operating from a single supply as low as +2.7 V, the ADM3307E is a five-driver/three-receiver serial port transceiver, and fully meets full EIA-232 standards. It features an on-board, charge pump dc-to-dc converter, which eliminates the need for dual power supplies. This dc-to-dc converter also contains a voltage tripler and voltage inverter for internally generating positive and negative supplies from the power supply. It operates in Green Idle Mode, where the charge pump oscillator is gated on and off to maintain output voltage to +/-7.25 V, regardless of the load conditions. It has the added benefit of having +15kV ESD protection on both the RS-232 I/O pins and the TTL pins, making it ideal for harsh environments. It also operates at speeds of up to 1Mbps. The ADM3307E is available in a 28-pin TSSOP package as well as a space-saving 32-pin LFCSP package.APPLICATIONSMobile phone handsets/data cablesLaptop and notebook computersPrintersPeripheralsModemsPDAs/Hand-Held Devices/Palmtop Computers

The ADM3310E is a three-driver/five-receiver serial port transceiver, which meets EIA-232 standards while operating from a single power supply as low as +2.7V. It is similar to the ADM3311E but with two of the Receivers remain Active during Shutdown. It features an on-board, charge pump dc-to-dc converter, which eliminates the need for dual power supplies.This dc-to-dc converter also contains a voltage tripler and voltage inverter for internally generating positive and negative supplies from the power supply. It operates in Green Idle Mode, where the charge pump oscillator is gated on and off to maintain output voltage to +/-6 V, regardless of the load conditions. Another key feature is its ESD protection: up to +/−15kV on all I/O lines. The ADM3310E is available in a 28-pin TSSOP package as well as a space-saving 5×5mm 32-pin LFCSP package.APPLICATIONSMobile phone handsets/data cablesLaptop and notebook computersPrintersPeripheralsModemsPDAs/Hand-Held Devices/Palmtop Computers

The ADM3311E is a three driver/five receiver product designed to fully meet the EIA-232 standard while operating with a single +2.7 to 3.6V power supply. The devices feature an on-chip DC to DC converter, eliminating the need for dual power supplies. This DC-DC converter contains a voltage tripler and voltage inverter which internally generates a regulated ±7.5V from the input 3V power supply. An internal voltage monitoring circuit continually adjusts the oscillator frequency to maintain the desired output voltage levels. In an unloaded state, the oscillator idles at a minimum frequency (Green-Idle Mode™) thereby minimizing the power consumption. This makes these products ideal for battery powered portable devices.APPLICATIONSMobile phone handsets/data cablesLaptop and notebook computersPrintersPeripheralsModemsPDAs/Hand-Held Devices/Palmtop Computers

The ADM3312E is a three-driver/three-receiver serial port transceiver, which meets full EIA-232 standards while operating from a single power supply as low as +2.7V. It features an on-board, charge pump dc-to-dc converter, which eliminates the need for dual power supplies. This dc-to-dc converter also contains a voltage tripler and voltage inverter for internally generating positive and negative supplies from the power supply. It operates in Green Idle Mode, where the charge pump oscillator is gated on and off to maintain output voltage to +/-7.25 V, regardless of the load conditions. Another key feature is its ESD protection: up to +/-15kV on all I/O lines. The ADM3312E is available in a 24-pin TSSOP package as well as a space-saving 32-pin LFCSP package.APPLICATIONSMobile phone handsets/data cablesLaptop and notebook computersPrintersPeripheralsModemsPDAs/Hand-Held Devices/Palmtop Computers

Operating from a single supply as low as +2.7 V, the ADM3315E is a three-driver/three-receiver serial port transceiver, and fully meets full EIA-232 standards. It is similar to the ADM3312E but with the Power Supply Current reduced by up to 50%. It features an on-board, charge pump dc-to-dc converter, which eliminates the need for dual power supplies. This dc-to-dc converter also contains a voltage tripler and voltage inverter for internally generating positive and negative supplies from the power supply. It operates in Green Idle Mode, where the charge pump oscillator is gated on and off to maintain output voltage to +/-6 V, regardless of the load conditions. Another key feature is its ESD protection: up to +/-15kV on all I/O lines. The ADM3315E is available in a 24-pin TSSOP package as well as a space-saving 5×5mm 32-pin LFCSP package.APPLICATIONSMobile phone handsets/data cablesLaptop and notebook computersPrintersPeripheralsModemsPDAs/Hand-Held Devices/Palmtop Computers