The ADG7421F is a low voltage, dual single-pole/single-throw (SPST), low on-resistance switch that features overvoltage protection, power-off protection, and overvoltage detection on the source pins.When no power supplies are present, the switch remains in the off condition, and the switch inputs are high impedance. When powered, if the analog input signal levels on the Sx pins exceed VDD or VSS by a threshold voltage, VT, the switch automatically turns off and the digital FF (fault flag) pin drops to a logic low to indicate a fault.Input signal levels up to +60 V or ?60 V relative to ground are blocked, in both the powered and unpowered condition. The switches turn on with a Logic 1 input and conducts equally well in both directions with an analog signal range of VSS + 0.1 V to VDD ? 0.55 V for a 5 V single supply. The digital input is compatible with 1.8 V logic inputs over the full operating supply range.The ADG7421F is ideal for providing overvoltage protection for small signals such as resistance temperature device (RTD) inputs (see Figure 56 in the data sheet) and thermocouple inputs (see Figure 55). The ability to protect against high voltages up to ?60 V coupled with a low voltage supply can enable complete low voltage input stages for industrial applications.APPLICATIONS Analog input/output modules Process control/distributed control systems? Data acquisition? Instrumentation? Avionics? Automatic test equipment? Communication systems Relay replacement

The ADG884 is a low voltage CMOS device containing two independently selectable single-pole, double-throw (SPDT) switches. This device offers ultralow on resistance of 0.41 ? over the full temperature range, making the part an ideal solution for applications that require minimal distortion through the switch. The ADG884 also has the capability of carrying large amounts of current, typically 600 mA at 5 V operation.The ADG884 is available in a 10-ball, 2 mm ? 1.5 mm WLCSP package, a 10-lead LFCSP_WD package, and a 10-lead MSOP package. These tiny packages make the ADG884 the ideal solution for space-constrained applications.When on, each switch conducts equally well in both directions and has an input signal range that extends to the supplies. The ADG884 exhibits break-before-make switching action.Product Highlights Single 1.8 V to 5.5 V operation. High current handling capability (400 mA continuous current). 1.8 V logic compatible. Low THD + N (0.01% typical). Tiny 2 mm ? 1.5 mm WLCSP, 3 mm ? 3 mm 10-lead LFCSP_WD, and 10-lead MSOP packages. ApplicationsCellular phonesPDAsMP3 playersPower routingBattery-powered systemsPCMCIA cardsModemsAudio and video signal routingCommunications systemsData Sheet, Rev. C, 6/08

The ADG888 is a low voltage, dual DPDT (double-pole,double-throw) CMOS device optimized for high performanceaudio switching. With its low power and small physical size, it isideal for portable devices.This device offers ultralow on resistance of less than 0.8 ? overthe full temperature range, making it an ideal solution forapplications requiring minimal distortion through the switch.The ADG888 also has the capability of carrying large amountsof current, typically 400 mA at 5 V operation.When on, each switch conducts equally well in both directionsand has an input signal range that extends to the supplies. TheADG888 exhibits break-before-make switching action.The ADG888 is available in a 16-ball WLCSP, 16-lead LFCSP,and a 16-lead TSSOP. These packages make the ADG888 the ideal solution for space-constrained applications.Product Highlights <0.6 ? over full temperature range of ?40?C to +125?C. High current handling capability (400 mA continuous current at 5 V). Low THD + N (0.008% typical). Tiny 16-ball WLCSP, 16-lead LFCSP, and 16-lead TSSOP. Applications Cellular phones? PDAs? MP3 players? Power routing? Battery-powered systems? PCMCIA cards? Modems? Audio and video signal routing? Communication systems? Data switching

The ADG936 / ADG936-R are wideband analog switches that comprise two independently selectable SPDT switches using a CMOS process to provide high isolation and low insertion loss to 1 GHz. The ADG936 is an absorptive/matched dual SPDT with 50 ? terminated shunt legs; the ADG936-R is a reflective dual SPDT. These devices are designed such that the isolation is high over the dc to 1 GHz frequency range. They have on-board CMOS control logic, eliminating the need for external controlling circuitry. The control inputs are both CMOS and LVTTL compatible. The low power consumption of these CMOS devices makes them ideally suited for wireless applications and general-purpose high frequency switching.

The ADHV4702-1 is a high voltage (220 V), unity-gain stable precision operational amplifier. The ADHV4702-1 offers high input impedance with low input bias current, low input offset voltage, low drift, and low noise for precision demanding applications. The next generation of proprietary semiconductor processes and innovative architecture from Analog Devices, Inc., enable this precision operational amplifier to operate from symmetrical dual supplies of ?110 V, asymmetrical dual supplies, or a single supply of 220 V. The ADHV4702-1?requires a minimum supply voltage of ?12 V from the?reference voltage for normal operation.For precision performance, the ADHV4702-1 has a 170 dB typical open-loop gain (AOL) and a 160 dB typical common-mode rejection ratio (CMRR). The ADHV4702-1 also has a 2 ?V/?C maximum input offset voltage (VOS) drift and an 8 nV/?Hz input voltage noise.The exceptional dc precision of the ADHV4702-1 is complemented by excellent dynamic performance with a small signal bandwidth of 10 MHz and a slew rate of 74 V/?s. The ADHV4702-1 has an output current of 20 mA typical.The ADHV4702-1 offers high voltage input common-mode swing as well as high voltage output swing, enabling precision high voltage use cases such as high-side current sensing. The ADHV4702-1 is also ideally suited for forcing a voltage in precision bias and control applications.The ADHV4702-1 is available in a 12-lead, 7 mm ? 7 mm lead frame chip scale package (LFCSP) with an exposed pad (EPAD) compliant to international electrotechnical commission (IEC) 61010-1 creepage and clearance standards. The copper EPAD provides a low thermal resistance path to improve heat dissipation and features high voltage isolation, allowing it to be safely connected to a 0 V ground plane regardless of VCC or VEE voltages. The ADHV4702-1 operates over the ?40?C to +85?C industrial temperature range.Applications High-side current sensing Automated test equipment High voltage drivers Piezotransducers Digital-to-analog converter (DAC) output buffers Light detecting and ranging (LiDAR), avalanche photodiode (APD), single photon avalanche diode (SPAD) biasing

The ADM1060?is a programmable supervisory/sequencing device that offers a single chip solution for multiple power supply fault detection and sequencing in communications systems.In central offices, servers, and other infrastructure systems, a common backplane dc supply is reduced to multiple board supplies using dc-to-dc converters. These multiple supplies are used to power different sections of the board, such as 3.3 V logic circuits, 5 V logic circuits, DSP core, and DSP I/O circuits. There is usually a requirement that certain sections power up before others; for example, a DSP core may need to power up before the DSP I/O, or vice versa, to avoid damage, miscommunication, or latch-up. The ADM1060 facilitates this, providing supply fault detection and sequencing/combinatorial logic for up to seven independent supplies. The seven supply fault detectors consist of one high voltage detector (up to +14.4 V), two bipolar voltage detectors (up to +6 V or down to ?6 V), and four positive low voltage detectors (up to +6 V). All of the detectors can be programmed to detect undervoltage, overvoltage, or out-ofwindow (undervoltage or overvoltage) conditions. The inputs to these supply fault detectors are via the VH (high voltage) pin, VBn (positive or negative) pins, and VPn (positive only) pins. Either the VH supply or one of the VPn supplies is used to power the ADM1060 (whichever is highest). This ensures that in the event of a supply failure, the ADM1060 is kept alive for as long as possible, thus enabling a reliable fault flag to be asserted and the system to be powered down in an ordered fashion.Other inputs to the ADM1060 include a watchdog detector (WDI) and four general-purpose inputs (GPIn). The watchdog detector can be used to monitor a processor clock. If the clock does not toggle (transition from low to high or from high to low) within a programmable timeout period (up to 18 sec.), a fail flag will assert. The four general-purpose inputs can be configured as logic buffers or to detect positive/negative edges and to generate a logic pulse or level from those edges. Thus, the user can input control signals from other parts of the system (e.g., RESET or POWER_GOOD) to gate the sequencing of the supplies supervised by the ADM1060.The ADM1060 features nine programmable driver outputs (PDOs). All nine outputs can be configured to be logic outputs, which can provide multiple functions for the end user such as RESET generation, POWER_GOOD status, enabling of LDOs, and watchdog timeout assertion. PDOs 1 to 4 have the added feature of being able to provide an internally charge-pumped high voltage for use as the gate drive of an external N-channel FET that could be placed in the path of one of the supplies being supervised.APPLICATIONS Central office systems Servers Infrastructure network boards High density, multivoltage system cards

The ADM1069 Super Sequencer? is a configurable supervisory/sequencing device that offers a single-chip solution for supplymonitoring and sequencing in multiple supply systems. In additionto these functions, the ADM1069 integrates a 12-bit analog-todigitalconverter (ADC) and four 8-bit voltage output digital-toanalogconverters (DACs). These circuits can implement a closedloopmargining system that enables supply adjustment by alteringeither the feedback node or reference of a dc-to-dc converterusing the DAC outputs.For more information about the ADM1069 register map, referto the AN-721 Application Note.Applications Central office systems Servers/routers Multivoltage system line cards DSP/FPGA supply sequencing In-circuit testing of margined supplies

The ADM1073 is a full-feature, negative voltage, hot swap controller that allows boards to be safely inserted and removed from a live ?48 V backplane. The part provides precise and robust current limiting, and protection against both transient and nontransient short circuits in overvoltage and undervoltage conditions. The ADM1073 can operate from a negative voltage of ?18 V to ?80 V and can tolerate transient voltages of up to ?200 V.Inrush current is limited to a programmable value by control-ling the gate drive of an external N-channel FET. The maximum current limit is set by the choice of the sense resistor, RSENSE.A built-in soft start function allows control of the inrush current profile by an external capacitor on the soft start (SS) pin.An external capacitor on the TIMER pin determines the time for which the FET gate is controlled to be high when maximum inrush current flows. The ADM1073 employs a limited consecutive retry scheme, whereby, if the load capacitance is not fully charged within one attempt, the FET gate is pulled low and retries after a cooling period.APPLICATIONS Central office switching Telecommunication and data communication equipment ?48 V distributed power systems Negative power supply control High availability servers ?48 V power supply modules Disk arrays

The ADM1175 is an integrated hot swap controller and current sense amplifier that offers digital current and voltage monitoring via an on-chip, 12-bit analog-to-digital converter (ADC), communicated through an I2C interface.An internal current sense amplifier senses voltage across the sense resistor in the power path via the VCC pin and the SENSE pin.The ADM1175 limits the current through this resistor by controlling the gate voltage of an external N-channel FET in the power path, via the GATE pin. The sense voltage (and, therefore, the inrush current) is kept below a preset maximum.The ADM1175 protects the external FET by limiting the time that it spends with maximum current running through it. This current limit period is set by the choice of capacitor attached to the TIMER pin. Additionally, the device provides protection from overcurrent events that may occur once the hot swap event is complete. In the case of a short-circuit event, the current in the sense resistor exceeds an overcurrent trip threshold, and the FET is switched off immediately by pulling down the GATE pin.A 12-bit ADC can measure the current seen in the sense resistor, as well as the supply voltage on the VCC pin. An industry-standard I2C interface allows a controller to read current and voltage data from the ADC. Measurements can be initiated by an I2C command or via the convert (CONV) pin. The CONV pin is especially useful for synchronizing reads on multiple ADM1175 devices. Alternatively, the ADC can run continuously, and the user can read the latest conversion data whenever it is required. Up to four unique I2C addresses can be created, depending on the way the ADR pin is connected.The ADM1175 is packaged in a 10-lead MSOP.Applications Power monitoring/power budgeting Central office equipment Telecommunication and data communication equipment PCs/servers

The ADM1185 is an integrated, 4-channel, voltage monitoring and sequencing device. A 2.7 V to 5.5 V power supply is required on the VCC pin to power the device.Four precision comparators monitor four voltage rails. All comparators have a 0.6 V reference with a worst-case accuracy of 0.8%. Resistor networks that are external to the VIN1, VIN2, VIN3, and VIN4 pins set the trip points for the monitored supply rails.A digital core interprets the status of the comparator outputs.Internal time delays can be used for sequencing the startup of subsequent power supplies enabled by the outputs. Supplies falling out of range are also detected and, as a result, appropriate outputs are disabled.The ADM1185 has four open-drain outputs. In a typical configuration, OUT1 to OUT3 are used to enable power supplies, while PWRGD is a common power-good output, indicating the status of all monitored supplies.The ADM1185 is available in a 10-lead mini small outline package (MSOP).APPLICATIONS Monitor and alarm functions Power supply sequencing Telecommunication and data communication equipment PCs/servers