Analog Devices Inc./Maxim Integrated

The LTC1745 is a 25Msps, sampling 12-bit A/D converter designed for digitizing high frequency, wide dynamic range signals. Pin selectable input ranges of ±1V and ±1.6V along with a resistor programmable mode allow the LTC1745’s input range to be optimized for a wide variety of applications.The LTC1745 is perfect for demanding communications applications with AC performance that includes 72.5dB SNR and 91dB spurious free dynamic range. Ultralow jitter of 0.3psRMSallows undersampling with excellent noise performance. DC specs include ±1LSB INL maximum and ±0.75LSB DNL over temperature.The digital interface is compatible with 5V, 3V and 2V logic systems. The ENC andENCinputs may be driven differentially from PECL, GTL and other low swing logic families or from single-ended TTL or CMOS. The low noise, high gainENCand ENC inputs may also be driven by a sinusoidal signal without degrading performance. A separate digital output power supply can be operated from 0.5V to 5V, making it easy to connect directly to low voltage DSPs or FIFOs.The TSSOP package with a flow-through pinout simplifies the board layout.ApplicationsTelecommunicationsMedical ImagingReceiversCellular Base StationsSpectrum AnalysisImaging Systems

The LTC1746 is a 25Msps, sampling 14-bit A/D converter designed for digitizing high frequency, wide dynamic range signals. Pin selectable input ranges of ±1V and ±1.6V along with a resistor programmable mode allow the LTC1746’s input range to be optimized for a wide variety of applications.The LTC1746 is perfect for demanding communications applications with AC performance that includes 77.5dB SNR and 91dB spurious free dynamic range. Ultralow jitter of 0.3psRMSallows undersampling with excellent noise performance. DC specs include ±3LSB INL maximum and no missing codes over temperature.The digital interface is compatible with 5V, 3V and 2V logic systems. The ENC andENCinputs may be driven differentially from PECL, GTL and other low swing logic families or from single-ended TTL or CMOS. The low noise, high gainENCand ENC inputs may also be driven by a sinusoidal signal without degrading performance. A separate digital output power supply can be operated from 0.5V to 5V, making it easy to connect directly to low voltage DSPs or FIFOs.The TSSOP package with a flow-through pinout simplifies the board layout.ApplicationsTelecommunicationsMedical ImagingReceiversCellular Base StationsSpectrum AnalysisImaging Systems

The LTC1747 is an 80Msps, sampling 12-bit A/D converter designed for digitizing high frequency, wide dynamic range signals. Pin selectable input ranges of ±1V and ±1.6V along with a resistor programmable mode allow the LTC1747’s input range to be optimized for a wide variety of applications.The LTC1747 is perfect for demanding communications applications with AC performance that includes 72dB SNR and 85dB spurious free dynamic range. Ultralow jitter of 0.15psRMSallows undersampling of IF frequencies with excellent noise performance. DC specs include ±1.5 LSB INL and ±0.8LSB DNL over temperature.The digital interface is compatible with 5V, 3V, 2V and LVDS logic systems. TheENCand ENC inputs may be driven differentially from PECL, GTL and other low swing logic families or from single-ended TTL or CMOS. The low noise, high gainENCand ENC inputs may also be driven by a sinusoidal signal without degrading performance. A separate output power supply can be operated from 0.5V to 5V, making it easy to connect directly to any low voltage DSPs or FIFOs.The TSSOP package with a flow-through pinout simplifies the board layout.ApplicationsTelecommunicationsReceiversCellular Base StationsSpectrum AnalysisImaging Systems

The LTC1749 is an 80Msps, 12-bit A/D converter designed for digitizing wide dynamic range signals up to frequencies of 500MHz. The input range of the ADC can be optimized with the on-chip PGA sample-and-hold circuit and flexible reference circuitry.The LTC1749 has a highly linear sample-and-hold circuit with a bandwidth of 500MHz. The SFDR is 80dB with an input frequency of 250MHz. Ultralow jitter of 0.15psRMSallows undersampling of IF frequencies with minimal degradation in SNR. DC specs include ±1LSB INL and no missing codes.The digital interface is compatible with 5V, 3V, 2V and LVDS logic systems. TheENCand ENC inputs may be driven differentially from PECL, GTL and other low swing logic families or from single-ended TTL or CMOS. The low noise, high gainENCand ENC inputs may also be driven by a sinusoidal signal without degrading performance. A separate output power supply can be operated from 0.5V to 5V, making it easy to connect directly to low voltage DSPs or FIFOs.The 48-pin TSSOP package with a flow-through pinout simplifies the board layout.ApplicationsDirect IF SamplingTelecommunicationsReceiversCellular Base StationsSpectrum AnalysisCommunications Test EquipmentUndersampling

The LTC1750 is an 80Msps, 14-bit A/D converter designed for digitizing wide dynamic range signals up to frequencies of 500MHz. The input range of the ADC can be optimized with the on-chip PGA sample-and-hold circuit and flexible reference circuitry.The LTC1750 has a highly linear sample-and-hold circuit with a bandwidth of 500MHz. The SFDR is 82dB with an input frequency of 250MHz. Ultralow jitter of 0.12psRMSallows undersampling of IF frequencies with minimal degradation in SNR. DC specs include ±3LSB INL and no missing codes.The digital interface is compatible with 5V, 3V, 2V and LVDS logic systems. TheENCand ENC inputs may be driven differentially from PECL, GTL and other low swing logic families or from single-ended TTL or CMOS. The low noise, high gainENCand ENC inputs may also be driven by a sinusoidal signal without degrading performance. A separate output power supply can be operated from 0.5V to 5V, making it easy to connect directly to any low voltage DSPs or FIFOs.The 48-pin TSSOP package with a flow-through pinout simplifies the board layout.ApplicationsTelecommunicationsReceiversCellular Base StationsSpectrum AnalysisImaging SystemsMRITomography

The LTC1753 is a high power, high efficiency switching regulator controller optimized for 5V input to a digitally programmable 1.3V-3.5V output. The internal 5-bit DAC programs the output voltage from 1.3V to 2.05V in 50mV increments and from 2.1V to 3.5V in 100mV increments. The precision internal reference and an internal feedback system provide an output accuracy of ±1.5% at room temperature and typically ±2% over temperature, load current and line voltage shifts. The LTC1753 uses a synchronous switching architecture with two external N-channel output devices, providing high efficiency and eliminating the need for a high power, high cost P-channel device. Additionally, it senses the output current across the on-resistance of the upper N-channel FET, providing an adjustable current limit without an external low value sense resistor.The LTC1753 free-runs at 300kHz and can be synchronized to a faster external clock if desired. It provides a phase lead compensation scheme and under harsh loading conditions, the PWM duty cycle can be momentarily forced to 0% or 100% to reduce the output voltage recovery time.ApplicationsPower Supply for Pentium®III, AMD-K6®-2, SPARC, ALPHA and PA-RISC MicroprocessorsHigh Power 5V to 1.3V-3.5V Regulators

The LTC1754 is a micropower charge pump DC/DC converter that produces a regulated output. The input voltage range is 2V to 4.4V for 3.3V output and 2.7V to 5.5V for 5V output. Extremely low operating current and a low external parts count (one flying capacitor and two small bypass capacitors at VINand VOUT) make the LTC1754 ideally suited for small, battery-powered applications. The total component area of the application circuit shown below is only 0.052 inch².The LTC1754 operates as a Burst Mode™switched capacitor voltage doubler to produce a regulated output. It has thermal shutdown capability and can survive a continuous short circuit from VOUTto GND.The LTC1754 is available in a 6-pin SOT-23 package.ApplicationsSIM Interface Supplies for GSM Cellular TelephonesWhite LED Power SuppliesLi-Ion Battery Backup SuppliesHandheld ComputersSmart Card ReadersPCMCIA Local 5V Supplies