ISO106B

Overview

The ISO106B is a hermetic, capacitive-coupled isolation buffer amplifier manufactured by Texas Instruments (originally Burr-Brown). It operates within an ambient temperature range of -25°C to +85°C and utilizes a 40-pin ceramic DIP package. The device provides a rated continuous isolation voltage of 3500 Vrms at 60Hz and withstands up to 8000 Vpk for 10 seconds. Key electrical specifications include a small-signal bandwidth of 70 kHz, a slew rate of 0.5 V/µs, and a nominal gain of 1 V/V. It features a wide input voltage range of ±10V and includes integrated ±5V DC voltage references.

Feature Summary

• Hermetically sealed hybrid construction utilizing rugged barrier and high-voltage ceramic capacitors
• Digital encoding mechanism ensures accurate signal isolation without galvanic connection between stages
• Integrated dual voltage reference outputs facilitate bipolar offset point setting
• Capacitive coupling barrier provides immunity to severe ground noise and high transient voltages

Applications

• Transducer channel isolation for thermocouples, RTDs, pressure bridges, and flow meters
• Isolation for 4mA to 20mA industrial control loops
• Motor and SCR control systems requiring fault protection
• Ground loop elimination in data acquisition and test equipment
• Biomedical and analytical measurements involving high voltage potentials

Procurement Notes

Verify the specific ordering suffix 'B' against the manufacturer's datasheet to confirm the exact accuracy class and initial error specifications. Confirm that the required package type matches the 40-pin ceramic DIP format. Ensure the application environment remains within the specified operating temperature limits of -25°C to +85°C. Check for any RoHS compliance requirements as this component may be classified under older manufacturing standards.

Selection Notes

Select the ISO106B when high-level analog signals near ±10V require precise isolation with minimal external components. This model is suitable for applications demanding superior common-mode rejection and high transient immunity. Consider the available optional gain and offset adjustment pins if factory-trimmed parameters do not meet system calibration needs. Evaluate the need for bandwidth modification using external capacitors on the designated filter pins.

Part Context

The ISO106B belongs to the ISO102/ISO106 series of isolation buffer amplifiers developed by Burr-Brown, now part of Texas Instruments. These devices utilize a unique three-chip hybrid design contained within a single ceramic package. The series distinguishes itself through industry-standard dimensions and side-brazed DIP construction, facilitating automatic insertion techniques during production assembly.

Replacement Considerations

The ISO102 serves as a lower isolation rating alternative within the same family. Verify pin compatibility and package dimensions before substitution. No direct modern equivalents are listed in the provided documentation.