SLVSL52 September   2026 XTR100

ADVMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 ESD Protection
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Zero-Drift Clocking
      2. 7.1.2 Basic Functionality in Loop-Powered Transmitters
      3. 7.1.3 Current Consumption
      4. 7.1.4 System Error Estimation
    2. 7.2 Typical Applications
      1. 7.2.1 XTR100 4mA – 20mA Transmitter
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
      2. 7.2.2 XTR100 4mA – 20mA Low Voltage Transmitter
      3. 7.2.3 XTR100 Precision Divider and Adder
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 PSpice® for TI
        2. 8.1.1.2 TINA-TI™ Simulation Software (Free Download)
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

6.1 Overview

The XTR1xx family is a combination of precision amplifiers and highly-matched resistors primarily optimized for precision 2-wire transmitter application, although can still be used in general-purpose precision applications. The amplifiers within XTR1xx have state-of-the-art, proprietary, precision zero-drift technology offering ultra-low input offset voltage and drift. The amplifiers operate from 1.7V to 5.5V, are unity-gain stable, feature 1.0MHz bandwidth, 55nV/√Hz noise spectral density for only 40μA of typical quiescent current per amplifier, and no 1/f noise.

The XTR1xx has two integrated resistors 10kΩ and 40kΩ, creating an ultra-precise ratio of 1:4 with less than 0.05% tolerance, and ±2ppm/°C drift. XTR100 comes in 6-pin DBV package compatible with common 5-pin SOT-23 op amp pinout. XTR102 has an extra resistor of 480kΩ and a dedicated input for HART modulation signal. XTR120 is a super-set of XTR102 in addition to a second zero-drift precision amplifier that can be used to actively filter PWM signals. All XTR1xx family devices are specified over the industrial temperature range from –40°C to +125°C.

The ultra-low amplifier offset drift, and ultra-low resistor ratio drift in addition to low noise enables unprecedented transmitter precision. When combined with ultra-low-power, ultra-low voltage, and small package, these features make the XTR1xx an excellent choice for building precision 4mA – 20mA transmitter. The DBV package offers a smooth transition from discrete implementation to XTR100. The support for HART input and PWM input confirms a wide range of applications. In addition, the wide bandwidth offers high reliability and better EMC features.