TPS26614DDFR

Current Regulation/Management Overview

The TPS26614DDFR is a 50-V universal current loop protector from Texas Instruments, designed for analog input/output, sensor transmitters, HART inputs, and UART IO protection. It supports ±20 mA, 0–20 mA, and 4–20 mA loops with a low RON of 7.5 Ω to minimize voltage drop. The device withstands ±50 V supply voltages and operates on external bipolar supplies from ±2.25 V to ±20 V or single-polar supplies from 3 V to 30 V. It features a MODE pin for 2x current limit support and includes a loop power mode for testing unpowered loops.

Current Regulation/Management Feature Summary

• Provides universal input protection for standard current loop configurations including ±20 mA, 0-20 mA, and 4-20 mA.
• Features a low ON-resistance to minimize voltage drop across the current loop, extending operational range under lower supply voltages.
• Includes flexible MODE pin configuration to support double current limit settings for proper two-wire transmitter startup.
• Supports operation in both bipolar and single-polar power supply environments with dedicated loop power mode for diagnostics.

Current Regulation/Management Applications

• Analog input and output signal conditioning circuits
• Sensor transmitter protection in industrial automation
• HART protocol input interface protection
• UART I/O line protection

Current Regulation/Management Procurement Notes

Verify the specific suffix DDFFR indicates the SOT-23-THN package variant when ordering. Confirm that the required operating temperature range covers -40°C to 125°C TJ for your application environment. Ensure the design accommodates the 8-pin surface mount footprint. Cross-reference the datasheet revision date to ensure compatibility with latest electrical specifications before finalizing procurement.

Current Regulation/Management Selection Notes

Select this component when protecting current loops against miswiring and overvoltage up to 50 V. It is suitable for applications requiring low voltage drop in the signal path. Consider the MODE pin functionality if dual current limit thresholds are needed for transmitter startup. Verify that the available supply rails match the specified bipolar or single-polar ranges for optimal performance.

Current Regulation/Management Part Context

This part belongs to the TPS2661x family of current loop protectors. It shares functional similarities with other members like TPS26612 and TPS26613 but differs in package and specific pinout configurations. The DDFR suffix denotes the thin SOT-23 package variant optimized for space-constrained designs within the broader Texas Instruments protection portfolio.

Current Regulation/Management Replacement Considerations

Potential substitutes include TPS26612DDFR and TPS26613DDFR from the same family. Verify pin-to-pin compatibility and identical electrical characteristics such as the 7.5 Ω RON and 50 V rating before substitution. Other series like TPS2660 or TPS2663 may offer similar protection but require schematic review due to potential functional differences.

Current Regulation/Management FAQ

What is the maximum voltage the TPS26614DDFR can withstand?

The device is rated to withstand and protect loads from positive and negative supply voltages up to ±50 V.

Can the TPS26614DDFR operate with a single power supply?

Yes, it can be powered by a single-polar supply ranging from 3 V to 30 V, in addition to bipolar supplies.

What is the purpose of the MODE pin?

The MODE pin allows flexible configuration to achieve a 2x current limit setting, which facilitates proper startup for two-wire transmitters.