The ADP2138 and ADP2139 are high efficiency, low quiescent current, synchronous step-down dc-to-dc converters. The ADP2139 has the additional feature of an internal discharge switch. The total solution requires only three tiny external components. When the MODE pin is set high, the buck regulator operates in forced PWM mode, which provides low peak-to-peak ripple for power supply noise sensitive loads at the expense of light load efficiency. When the MODE pin is set low, the buck regulator automatically switches operating modes, depending on the load current level. At higher output loads, the buck regulator operates in PWM mode. When the load current falls below a predefined threshold, the regulator operates in power save mode (PSM), improving light load efficiency.The ADP2138/ADP2139 operate on input voltages of 2.3 V to 5.5 V, which allows for single lithium or lithium polymer cell, multiple alkaline or NiMH cell, PCMCIA, USB, and other standard power sources. The maximum load current of 800 mA is achievable across the input voltage range.The ADP2138/ADP2139 are available in fixed output voltages of 3.3 V, 3.0 V, 2.8 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, 1.0 V, and 0.8 V. All versions include an internal power switch and synchronous rectifier for minimal external part count and high efficiency. The ADP2138/ADP2139 have internal soft start and they are internally compensated. During logic controlled shutdown, the input is disconnected from the output and the ADP2138/ADP2139 draw 0.2 ?A (typical) from the input source.Other key features include undervoltage lockout to prevent deep battery discharge, and soft start to prevent input current overshoot at startup. The ADP2138/ADP2139 are available in a 6-ball wafer level chip scale package (WLCSP).Applications PDAs and palmtop computers Wireless handsets Digital audio, portable media players Digital cameras, GPS navigation units

The LTC2311-16 is a low noise, high speed 16-bit successive approximation register (SAR) ADC with differential inputs and wide input common mode range. Operating from a single 3.3V or 5V supply, the LTC2311- 16 has an 8VP-P differential input range, making it ideal for applications which require a wide dynamic range with high common mode rejection. The LTC2311-16 achieves ?3LSB INL typical, no missing codes at 16 bits and 81dB SNR typical.The LTC2311-16 has an onboard low drift (20ppm/?C max) 2.048V or 4.096V temperature-compensated reference and provides an external 1.25V buffered reference input. The LTC2311-16 also has a high speed SPI-compatible serial interface that supports CMOS or LVDS. The fast 5Msps throughput with one-cycle latency makes the LTC2311-16 ideally suited for a wide variety of high speed applications. The LTC2311-16 dissipates only 50mW with a 5V supply and offers nap and sleep modes to reduce the power consumption to 5?W for further power savings during inactive periods.Applications High Speed Data Acquisition Systems Communications Remote Data Acquisition Imaging Optical Networking Automotive Multiphase Motor Control

DC1316A: Demo Board for LT1913 25V, 3.5A, 2.4MHz Step-Down Switching Regulator.

The AD5593R has eight input/output (I/O) pins, which can beindependently configured as digital-to-analog converter (DAC)outputs, analog-to-digital converter (ADC) inputs, digital outputs,or digital inputs. When an I/O pin is configured as an analogoutput, it is driven by a 12-bit DAC. The output range of theDAC is 0 V to VREF or 0 V to 2 ? VREF. When an I/O pin isconfigured as an analog input, it is connected to a 12-bit ADCvia an analog multiplexer. The input range of the ADC is 0 V toVREF or 0 V to 2 ? VREF. The I/O pins can also be configured tobe general-purpose, digital input or output (GPIO) pins. Thestate of the GPIO pins can be set or read back by accessing theGPIO write data register and GPIO read configuration registers,respectively, via an I2C write or read operation.The AD5593R has an integrated 2.5 V, 20 ppm/?C reference thatis turned off by default and an integrated temperature indicatorthat gives an indication of the die temperature. The temperaturevalue is read back as part of an ADC read sequence.The AD5593R is available in 16-lead TSSOP and LFCSP, as wellas a 16-ball WLCSP, and operates over a temperature range of?40?C to +105?C.Applications Control and monitoring General-purpose analog and digital I/O

The ADL5375 is a broadband quadrature modulator designed for operation from 400 MHz to 6 GHz. Its excellent phase accuracy and amplitude balance enable high performance intermediate frequency or direct radio frequency modulation for communication systems.The ADL5375 features a broad baseband bandwidth, along with an output gain flatness that varies no more than 1 dB from 450 MHz to 3.8 GHz. These features, coupled with a broadband output return loss of