The ICL7109 is a monolithic 12 bit A/D converter designed for easy interface with microprocessors and UARTs. The 12 bit binary plus polarity and over-range outputs can be directly interfaced to a microprocessor bus. In this mode the ICL7109 is controlled by the microprocessor through the chip select and tow byte enable inputs. For remote data logging applications the ICL7109 outputs are easily converted to a UART handshake mode, working with industry standard UARTs to provide serial data transmission.This device offers high accuracy by lowering rollover error to less than 1 count and zero reading drift to less than 1μV/ °C. In many data acquisition systems the ICL7109 is an attractive, low cost, one-per-channel alternative to analog multiplexing due to its low power consumption and input bias current.Maxim has added a zero-integrator phase to the ICL7109, eliminating overrange hangover, 'crosstalk' and hysteresis effects. Maxim has also increased the current sourcing capabilities of the ICL7109, enabling it to rapidly drive the large capacitances often found on microprocessor busses.ApplicationsCurrentFlowPowerPressureResistanceSpeedTemperatureVoltageWeight

The ICL7109 is a monolithic 12 bit A/D converter designed for easy interface with microprocessors and UARTs. The 12 bit binary plus polarity and over-range outputs can be directly interfaced to a microprocessor bus. In this mode the ICL7109 is controlled by the microprocessor through the chip select and tow byte enable inputs. For remote data logging applications the ICL7109 outputs are easily converted to a UART handshake mode, working with industry standard UARTs to provide serial data transmission.This device offers high accuracy by lowering rollover error to less than 1 count and zero reading drift to less than 1μV/ °C. In many data acquisition systems the ICL7109 is an attractive, low cost, one-per-channel alternative to analog multiplexing due to its low power consumption and input bias current.Maxim has added a zero-integrator phase to the ICL7109, eliminating overrange hangover, 'crosstalk' and hysteresis effects. Maxim has also increased the current sourcing capabilities of the ICL7109, enabling it to rapidly drive the large capacitances often found on microprocessor busses.ApplicationsCurrentFlowPowerPressureResistanceSpeedTemperatureVoltageWeight

The Maxim ICL7135 is a high precision monolithic41/2 digit A/D converter. Dual slope conversion reliabilityis combined with ±1 in 20,000 count accuracy anda 2.0000V full scale capability. It features high impedancedifferential inputs, nearly ideal differential linearity,true ratiometric operation, auto zero and auto-polarity.The multiplexed BCD outputs and digit drivers provideeasy interface to external display drivers like the MaximICM7211A. The only other external components neededto make precision DVM/DPMs are a reference and aclock. For more complex systems the BCD outputs areenhanced by Active-Low STROBE, OVERRANGE, UNDERRANGE,RUN/Active-Low HOLD and BUSY lines providing easy interface tomicroprocessors and UARTs. This interfacing capabilitymakes the ICL7135 an ideal device for use in microprocessorbased data acquisition and control systems.The ICL7135 has auto-zero accuracy better than 10µV,zero drift of 0.5µV/°C, input bias current of 10pA max. androllover error of less than 1 count.ApplicationsCurrentMaterial ThicknessPressureResistanceSpeedTemperatureVoltageWeight

The ICL761X–ICL764X family of monolithic CMOS op amps combine ultra-low input current with low-power operation over a wide supply voltage range. With pinselectable quiescent currents of 10µA, 100µA, or 1000µA per amplifier, these op amps will operate from ±1V to ±8V power supplies, or from single supplies from 2V to 16V. The CMOS outputs swing to within millivolts of the supply voltages.The ultra-low bias current of 1pA makes this family of op amps ideal for long time constant integrators, picoammeters, low droop rate sample/hold amplifiers and other applications where input bias and offset currents are critical. A low noise current of 0.01pA and an input impedance of 1012Ω ensure optimum performance with very high source impedances in such applications as pH meters and photodiode amplifiers.ApplicationsBattery-Powered InstrumentsHearing Aids and Microphone AmplifiersLong-Time Constant IntegratorsLow Droop Rate Sample/Hold AmplifiersLow-Frequency Active FiltersLow-Leakage AmplifiersPicoammeters

The ICL761X–ICL764X family of monolithic CMOS op amps combine ultra-low input current with low-power operation over a wide supply voltage range. With pinselectable quiescent currents of 10µA, 100µA, or 1000µA per amplifier, these op amps will operate from ±1V to ±8V power supplies, or from single supplies from 2V to 16V. The CMOS outputs swing to within millivolts of the supply voltages.The ultra-low bias current of 1pA makes this family of op amps ideal for long time constant integrators, picoammeters, low droop rate sample/hold amplifiers and other applications where input bias and offset currents are critical. A low noise current of 0.01pA and an input impedance of 1012Ω ensure optimum performance with very high source impedances in such applications as pH meters and photodiode amplifiers.ApplicationsBattery-Powered InstrumentsHearing Aids and Microphone AmplifiersLong-Time Constant IntegratorsLow Droop Rate Sample/Hold AmplifiersLow-Frequency Active FiltersLow-Leakage AmplifiersPicoammeters

The ICL761X–ICL764X family of monolithic CMOS op amps combine ultra-low input current with low-power operation over a wide supply voltage range. With pinselectable quiescent currents of 10µA, 100µA, or 1000µA per amplifier, these op amps will operate from ±1V to ±8V power supplies, or from single supplies from 2V to 16V. The CMOS outputs swing to within millivolts of the supply voltages.The ultra-low bias current of 1pA makes this family of op amps ideal for long time constant integrators, picoammeters, low droop rate sample/hold amplifiers and other applications where input bias and offset currents are critical. A low noise current of 0.01pA and an input impedance of 1012Ω ensure optimum performance with very high source impedances in such applications as pH meters and photodiode amplifiers.ApplicationsBattery-Powered InstrumentsHearing Aids and Microphone AmplifiersLong-Time Constant IntegratorsLow Droop Rate Sample/Hold AmplifiersLow-Frequency Active FiltersLow-Leakage AmplifiersPicoammeters

The ICL761X–ICL764X family of monolithic CMOS op amps combine ultra-low input current with low-power operation over a wide supply voltage range. With pinselectable quiescent currents of 10µA, 100µA, or 1000µA per amplifier, these op amps will operate from ±1V to ±8V power supplies, or from single supplies from 2V to 16V. The CMOS outputs swing to within millivolts of the supply voltages.The ultra-low bias current of 1pA makes this family of op amps ideal for long time constant integrators, picoammeters, low droop rate sample/hold amplifiers and other applications where input bias and offset currents are critical. A low noise current of 0.01pA and an input impedance of 1012Ω ensure optimum performance with very high source impedances in such applications as pH meters and photodiode amplifiers.ApplicationsBattery-Powered InstrumentsHearing Aids and Microphone AmplifiersLong-Time Constant IntegratorsLow Droop Rate Sample/Hold AmplifiersLow-Frequency Active FiltersLow-Leakage AmplifiersPicoammeters

The ICL761X–ICL764X family of monolithic CMOS op amps combine ultra-low input current with low-power operation over a wide supply voltage range. With pinselectable quiescent currents of 10µA, 100µA, or 1000µA per amplifier, these op amps will operate from ±1V to ±8V power supplies, or from single supplies from 2V to 16V. The CMOS outputs swing to within millivolts of the supply voltages.The ultra-low bias current of 1pA makes this family of op amps ideal for long time constant integrators, picoammeters, low droop rate sample/hold amplifiers and other applications where input bias and offset currents are critical. A low noise current of 0.01pA and an input impedance of 1012Ω ensure optimum performance with very high source impedances in such applications as pH meters and photodiode amplifiers.ApplicationsBattery-Powered InstrumentsHearing Aids and Microphone AmplifiersLong-Time Constant IntegratorsLow Droop Rate Sample/Hold AmplifiersLow-Frequency Active FiltersLow-Leakage AmplifiersPicoammeters

The ICL761X–ICL764X family of monolithic CMOS op amps combine ultra-low input current with low-power operation over a wide supply voltage range. With pinselectable quiescent currents of 10µA, 100µA, or 1000µA per amplifier, these op amps will operate from ±1V to ±8V power supplies, or from single supplies from 2V to 16V. The CMOS outputs swing to within millivolts of the supply voltages.The ultra-low bias current of 1pA makes this family of op amps ideal for long time constant integrators, picoammeters, low droop rate sample/hold amplifiers and other applications where input bias and offset currents are critical. A low noise current of 0.01pA and an input impedance of 1012Ω ensure optimum performance with very high source impedances in such applications as pH meters and photodiode amplifiers.ApplicationsBattery-Powered InstrumentsHearing Aids and Microphone AmplifiersLong-Time Constant IntegratorsLow Droop Rate Sample/Hold AmplifiersLow-Frequency Active FiltersLow-Leakage AmplifiersPicoammeters

The ICL7665 warns microprocessors (µPs) of overvoltage and undervoltage conditions. It draws a typical operating current of only 3µA. The trip points and hysteresis of the two voltage detectors are individually programmed via external resistors to any voltage greater than 1.3V. The ICL7665 will operate from any supply voltage in the 1.6V to 16V range, while monitoring voltages from 1.3V to several hundred volts. The Maxim ICL7665A is an improved version with a 2%-accurate VSET1 threshold and guaranteed performance over temperature.The 3µA quiescent current of the ICL7665 makes it ideal for voltage monitoring in battery-powered systems. In both battery- and line-powered systems, the unique combination of a reference, two comparators, and hysteresis outputs reduces the size and component count of many circuits.ApplicationsµP Voltage MonitoringBattery-Backup SwitchingHigh/Low Temperature, Pressure, Voltage AlarmsLow-Battery DetectionOver/Undervoltage ProtectionPower Supply Fault MonitoringPower-Fail and Brownout Detection