3650KG

Overview

The Texas Instruments 3650KG is an optically coupled linear isolation amplifier housed in a 32-pin ceramic DIP package. It provides a continuous rated isolation voltage of 2000V and withstands a minimum test voltage of 5000V for 10 seconds. The device features a bandwidth of 15kHz, a slew rate of 1.2V/µs, and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Optical coupling mechanism utilizing DC analog modulation to eliminate electromagnetic interference issues associated with carrier-type techniques.
• High common-mode rejection capability of 140dB at DC and 120dB at 60Hz with source unbalance.
• Ultra-low leakage characteristics including 0.35µA maximum current at 240V/60Hz and 1.8pF isolation capacitance.

Applications

• Industrial process control
• Data acquisition systems
• Biomedical measurements and patient monitoring
• Current shunt measurement

Procurement Notes

Verify the specific suffix 'KG' against the manufacturer's latest documentation to confirm pinout compatibility and electrical tolerances. Confirm that the component meets all necessary safety certifications required for the intended isolation barrier application before finalizing procurement.

Selection Notes

Select this component when high linearity and low drift are critical requirements. The 3650KG offers superior gain accuracy compared to transformer-coupled alternatives. Ensure the design accommodates the ±15V supply requirement and utilizes external gain-setting resistors for the desired transfer function.

Part Context

This part belongs to the Burr-Brown 3650 family of isolation amplifiers, now managed by Texas Instruments. It represents a transition from modular rack-mounted designs to integrated circuit reliability. The device is classified as Not Recommended for New Designs (NRND) in official catalogs.

Replacement Considerations

The 3650JG serves as a direct substitute within the same series. Verify that the replacement maintains the required 32-pin CDIP package dimensions and matches the specific offset voltage and gain error specifications needed for the circuit design.