Analog Devices

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

The LT1026 is a switched capacitor voltage doubler and inverter on a single monolithic die. Capable of operating from a 4V to 10V input, it provides ±7V to ±18V output.Output currents of over 10mA are available. Two charge pumps first double the input voltage then invert the doubled voltage. Manufactured in bipolar technology, the LT1026 is not susceptible to latchup and generates up to36V.The LT1026 offers a convenient way of generating additional system voltages without using inductors. Powering interface circuits, op amps or data acquisition circuitry off logic supplies is simplified.ApplicationsLine DriversOp Amp SuppliesBattery SplittersRS232 Power

The LT1028 (gain of –1 stable)/LT1128(gain of +1 stable) achieve a new standard of excellence in noise performance with 0.85nV/√Hz1kHz noise, 1.0nV/√Hz10Hz noise. This ultralow noise is combined with excellent high speed specifications (gain-bandwidth product is 75MHz for LT1028, 20MHz for LT1128), distortion-free output, and true precision parameters (0.1µV/°C drift, 10µV offset voltage, 30 million voltage gain). Although the LT1028/LT1128 input stage operates at nearly 1mA of collector current to achieve low voltage noise, input bias current is only 25nA.The LT1028/LT1128’s voltage noise is less than the noise of a 50Ω resistor. Therefore, even in very low source impedance transducer or audio amplifier applications, the LT1028/LT1128’s contribution to total system noise will be negligible.ApplicationsLow Noise Frequency SynthesizersHigh Quality AudioInfrared DetectorsAccelerometer and Gyro Amplifiers350 ohms Bridge Signal ConditioningMagnetic Search Coil AmplifiersHydrophone Amplifiers

The LT1029 is a 5V bandgap reference intended for use in the shunt or "Zener" mode, allowing it to be used as either a positive or negative reference. The output is pretrimmed to ± 0.2% accuracy with 20ppm/°C maximum temperature drift. A trim pin allows additional output adjustment for even more precise output voltage.Operating current range for the LT1029 is 700μA to 10mA. Extremely low dynamic impedance allows excellent output regulation even with fluctuating operating current.The LT1029 will replace an LM136-5 or LM336-5 and simplify circuits using the "minimum temperature coefficient" trim network. The LT1029 does not require this special network to meet its temperature drift specification; these application network components are simply removed. If output trimming is required for initial accuracy, the diodes in the trim network should be replaced with jumpers.ApplicationsA-to-D and D-to-A ConvertersPrecision RegulatorsPrecision Current SourcesV to F and F to V Converters

The LT1031 is a precision 10V 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 and can be used as a shunt regulator (two terminal Zener) 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 LT1031 reference is based on a buried Zener diode structure which 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 band-gap references.Unique circuit design makes the LT1031 the first three terminal IC reference to offer ultralow drift without the use of high power on-chip heaters. Output voltage is pre-trimmed to 0.05% accuracy.The LT1031 can be used as a plug-in replacement for the AD581 and LH0070*, with improved electrical and thermal performance.ApplicationsA to D and D to A ConvertersPrecision RegulatorsDigital VoltmetersInertial Navigation SystemsPrecision ScalesPortable Reference Standard