Analog Devices Inc./Maxim Integrated

The LT1017/LT1018 are general purpose micropower comparators. The LT1017 is optimized for lowest operating power while the LT1018 operates at higher power and higher speed. Both devices can operate from a single 1.1V cell up to 40V. The output stage includes a class "B" pull-up current source, eliminating the need for an external resistive pull-up and saving power. The output stage is also designed to allow driving loads connected to a supply more positive than the device, as can comparators with open-collector output stages.Input specifications are also excellent. On-chip trimming minimizes offset voltage, while high gain and common mode rejection ratio keep other input referred errors low. Common mode voltage range includes ground. Special circuitry prevents false output states even if the input is overdriven.The LT1017/LT1018 are pin compatible with older dual comparators such as 393 type devices.ApplicationsPower Supply MonitorsRelay DrivingOscillators

The LT1021 is a precision reference with ultralow drift and noise, extremely good long term stability and almost total immunity to input voltage variations. The reference output will both source and sink up to 10mA. Three voltages are available: 5V, 7V and 10V. The 7V and 10V units can be used as shunt regulators (two-terminal zeners) with the same precision characteristics as the three terminal connection. Special care has been taken to minimize thermal regulation effects and temperature induced hysteresis.The LT1021 references are based on a buried zener diode structure that eliminates noise and stability problems associated with surface breakdown devices. Further, a subsurface zener exhibits better temperature drift and time stability than even the best bandgap references.Unique circuit design makes the LT1021 the first IC reference to offer ultralow drift without the use of high power on-chip heaters.The LT1021-7 uses no resistive divider to set output voltage, and therefore exhibits the best long term stability and temperature hysteresis. The LT1021-5 and LT1021- 10 are intended for systems requiring a precise 5V or 10V reference with an initial tolerance as low as ±0.05%.ApplicationsA/D and D/A ConvertersPrecision RegulatorsDigital VoltmetersInertial Navigation SystemsPrecision ScalesPortable Reference Standard

The LT1022 JFET input operational amplifier combines high speed and precision performance.A 26V/µs slew rate and 8.5MHz gain-bandwidth product are simultaneously achieved with offset voltage of typically 80µV, 1.5µV/°C drift, bias currents of 50pA at 70°C, 500pA at 125°C. The output delivers 20mA of load current without gain degradation.The 250µV maximum offset voltage specification represents less than 1/2 least significant bit error in a 14-bit, 10V system.The LT1022A meets or exceeds all OP-16A and OP-16E specifications. It is faster and more accurate without stability problems at cold temperatures.The LT1022 can be used as the output amplifier for 12-bit current output D/A converters, as shown below.For a more accurate, lower power dissipation, but slower JFET input op amp, please refer to the LT1055 data sheet.ApplicationsFast D/A Output Amplifiers (12, 14, 16 Bits)High Speed InstrumentationFast, Precision Sample and HoldVoltage-to-Frequency ConvertersLogarithmic Amplifiers