Analog Devices Inc./Maxim Integrated

The LTC6605-7 contains two independent, fully differential amplifiers configured as matched 2nd order lowpass filters. The f–3dBof the filters is adjustable in the range of 6.5MHz to 10MHz.The internal op amps are fully differential, feature very low noise and distortion, and are compatible with 16-bit dynamic range systems. The inputs can accept single ended or differential signals. An input pin is provided for each amplifier to set the common mode level of the differential outputs.Internal laser-trimmed resistors and capacitors determine a precise, very well matched (in gain and phase) 7MHz 2nd order filter response. A single optional external resistor per channel can tailor the frequency response for each amplifier.Three-state BIAS pins determine each amplifier’s power consumption, allowing a choice between shutdown, medium power or full power.The LTC6605-7 is available in a compact 6mm × 3mm 22-pin leadless DFN package and operates over a –40°C to 85°C temperature range.ApplicationsWCDMA ADC Driver/FilterAntialiasing FilterSingle-Ended to Differential ConversionDAC Smoothing FilterZero-IF Direct Conversion Receivers

The LTC6702 is an extremely small dual comparator designed to maximize battery life while providing both speed and low voltage operation in applications where board space is a premium.These comparators operate on supplies between 1.7V and 5.5V, and have a maximum guaranteed propagation delay of 500ns while drawing only 30µA maximum quiescent current. Internal hysteresis desensitizes the LTC6702 to input noise and makes it easy to use, even with slow moving signals. CMOS inputs allow the use of large source impedances.The LTC6702 is available in the 8-pin SOT-23 and the tiny 2mm × 2mm DFN package.ApplicationsBattery Powered SystemsWindow ComparatorsThreshold Detectors/DiscriminatorsClock RegenerationAutomotive Sensing and Controls

The LTC6800 is a precision instrumentation amplifier. The CMRR is typically 116dB with a single 5V supply and is independent of gain. The input offset voltage is guaranteed below 100μV with a temperature drift of less than 250nV/°C. The LTC6800 is easy to use; the gain is adjustable with two external resistors, like a traditional op amp.The LTC6800 uses charge balanced sampled data techniques to convert a differential input voltage into a single ended signal that is in turn amplified by a zero-drift operational amplifier.The differential inputs operate from rail-to-rail and the single ended output swings from rail-to-rail. The LTC6800 is available in an MS8 surface mount package. For space limited applications, the LTC6800 is available in a 3mm × 3mm × 0.8mm dual fine pitch leadless package (DFN).ApplicationsThermocouple AmplifiersElectronic ScalesMedical InstrumentationStrain Gauge AmplifiersHigh Resolution Data Acquisition

The LTC6801 is a multicell battery monitoring IC incorporating a 12-bit ADC, a precision voltage reference, sampled comparator, and a high voltage input multiplexer. The LTC6801 can monitor as many as 12 series connected battery cells for overvoltage, undervoltage, and overtemperature conditions, indicating whether the cells are within specified parameters. The LTC6801 generates a clock output when no fault conditions exist. Differential clocking provides high noise immunity and ensures that battery stack fault conditions cannot be hidden by frozen bits or short circuit conditions.Each LTC6801 can operate with a battery stack voltage up to 60V and multiple LTC6801 devices can be stacked to monitor each individual cell in a long battery string. When multiple devices are stacked, the status signal of each LTC6801 can be daisy-chained, without opto-couplers or isolators, providing a single status output for the entire battery string.The LTC6801 is configurable by external pin strapping. Adjustable overvoltage and undervoltage thresholds support various Li-Ion chemistries. Selectable measurement times allow users to save power.ApplicationsRedundant Battery MonitorHybrid Electric VehiclesBattery Backup SystemsPower Systems Using Multiple Battery Cells

The LTC6802-2 is a complete battery monitoring IC that includes a 12-bit ADC, a precision voltage reference, a high voltage input multiplexer and a serial interface. Each LTC6802-2 can measure 12 series connected battery cells, with a total input voltage up to 60V. The voltage on all 12 input channels can be measured within 13ms.Many LTC6802-2 devices can be stacked to measure the voltage of each cell in a long battery string. Each LTC6802-2 has an individually addressable serial interface, allowing up to 16 LTC6802-2 devices to interface to one control processor and operate simultaneously.To minimize power, the LTC6802-2 offers a measure mode to monitor each cell for overvoltage and undervoltage conditions. A standby mode is also provided to reduce supply current to 50µA.Each cell input has an associated MOSFET switch that can discharge any overcharged cell.The related LTC6802-1 offers a serial interface that allows the serial ports of multiple LTC6802-1 devices to be daisy chained without opto-couplers or isolators.SPI InterfaceFeaturesLTC6802-1Daisy ChainMultiple devices can be connected in serial fashion without digital isolation.LTC6802-2AddressableParallel addressed SPI interface - each device in a chain communicates with a control processor in parallel via external digital isolators.ApplicationsElectric and Hybrid Electric VehiclesHigh Power Portable EquipmentBackup Battery SystemsHigh Voltage Data Acquisition Systems

The LTC6802-1 is a complete battery monitoring IC that includes a 12-bit ADC, a precision voltage reference, a high voltage input multiplexer and a serial interface. Each LTC6802-1 can measure up to 12 series connected battery cells with an input common mode voltage up to 60V. In addition, multiple LTC6802-1 devices can be placed in series to monitor the voltage of each cell in a long battery string. The unique level-shifting serial interface allows the serial ports of these devices to be daisy-chained without optocouplers or isolators.When multiple LTC6802-1 devices are connected in series they can operate simultaneously, permitting all cell voltages in the stack to be measured within 13ms.To minimize power, the LTC6802-1 offers a measure mode, which simply monitors each cell for overvoltage and undervoltage conditions. A standby mode is also provided.Each cell input has an associated MOSFET switch for discharging overcharged cells.For large battery stack applications requiring individually addressable serial communications, see the LTC6802-2.SPI InterfaceFeaturesLTC6802-1Daisy ChainMultiple devices can be connected in serial fashion without digital isolationLTC6802-2AddressableParallel addressed SPI interface - each device in a chain communicates with a control processor in parallel via external digital isolatorsApplicationsElectric and Hybrid Electric VehiclesHigh Power Portable EquipmentBackup Battery SystemsHigh Voltage Data Acquisition Systems