Overview

Features and Benefits

  • Gain Error: 0.04% Max
  • Gain Non-Linearity: 0.0008% (8ppm) Max
  • Gain Drift: 4ppm/°C Max
  • Supply Current: 105µA Max
  • Offset Voltage: 160µV Max
  • Offset Voltage Drift: 0.4µV/°C Typ
  • Offset Current: 600pA Max
  • CMRR, G = 100: 100dB Min
  • 0.1Hz to 10Hz Noise:
    • 0.9µVP-P: Typ
    • 2.3pAP-P Typ
  • Gain Bandwidth Product: 250kHz Min
  • Single or Dual Supply Operation
  • Surface Mount Package Available

Product Details

The LT1101 establishes the following milestones: (1) It is the first micropower instrumentation amplifier, (2) It is the first single supply instrumentation amplifier, (3) It is the first instrumentation amplifier to feature fixed gains of 10 and/or 100 in low cost, space-saving 8-lead packages.

The LT1101 is completely self-contained: no external gain setting resistor is required. The LT1101 combines its micropower operation (75µA supply current) with again error of 0.008%, gain linearity of 3ppm, gain drift of 1ppm/°C. The output is guaranteed to drive a 2k load to ±10V with excellent gain accuracy.

Other precision specifications are also outstanding: 50µV input offset voltage, 130pA input offset current, and low drift (0.4µV/°C and 0.7pA/°C). In addition, unlike other instrumentation amplifiers, there is no output offset voltage contribution to total error.

A full set of specifications are provided with ±15V dual supplies and for single 5V supply operation. The LT1101 can be operated from a single lithium cell or two Ni-Cad batteries. Battery voltage can drop as low as 1.8V, yet the LT1101 still maintains its gain accuracy. In single supply applications, both input and output voltages swing to within a few millivolts of ground. The output sinks current while swinging to ground—no external, power consuming pull down resistors are needed.

Applications

  • Differential Signal Amplification in Presence of Common Mode Voltage
  • Micropower Bridge Transducer Amplifier
    • Thermocouples
    • Strain Gauges
    • Thermistors
  • Differential Voltage-to-Current Converter
  • Transformer Coupled Amplifier
  • 4mA to 20mA Bridge Transmitter

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Tools & Simulations

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

LTspice

Models for the following parts are available in LTspice:

LT1101
LT1101A

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


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