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Texas Instruments TPS26614DDFR
- Part No.:
- TPS26614DDFR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TPS26614DDFR.pdf
- Description:
- IC CURRENT REGULATOR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:5,961
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Product details
Overview
TPS26614DDFR from Texas Instruments is a universal ±20 mA / 4–20 mA current loop protector with integrated bipolar 32-mA current limit, ±50-V operating voltage, 7.5-Ω typical RON, EN pin for enable control, and auto-retry fault response-designed for analog input/output modules in PLCs and industrial sensor interfaces.
For engineers reviewing the TPS26614DDFR datasheet, TPS26614DDFR pinout, TPS26614DDFR application, or TPS26614DDFR equivalent, key selection criteria include its EN-controlled switching, ±50-V miswiring tolerance, auto-retry behavior under overload (tRETRY1 = 0.8 s), HART-compliant 10-kHz bandwidth, and SOT-23-8 (DDF) package compatibility with space-constrained I/O designs.
Technical Context
The TPS26614DDFR implements dual-stage overcurrent protection: a regulated 32-mA bipolar current limit (extendable to 60 mA via MODE pin) and sub-5-µs fast-trip shutdown for short-circuit transients. Its EN pin enables system-level power sequencing, while SGOOD provides open-drain fault signaling with 685-µs deglitching.
It supports unipolar (3–30 V) and bipolar (±2.25 V to ±20 V) supply operation, delivers <100 nA loop leakage, and features output-side undervoltage/overvoltage cutoff (VOUT_OVLO = +Vs + 0.05–0.30 V; VO_UVLO = –Vs – 0.40–0.20 V) to protect against field-side miswiring-without requiring external TVS for IEC61000-4-4 EFT immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage | ±50 V - withstands field-side polarity reversals and surge events without latch-off |
| Bipolar Current Limit | ±32 mA typical - precise regulation for 4–20 mA and ±20 mA loops; extends sense resistor lifetime |
| RON | 7.5 Ω typical - minimizes voltage drop (<1.6 V at 20 mA), enabling operation with low-voltage supplies |
| Enable Control | EN pin with 1.72-V rising threshold - allows software-controlled channel isolation in multiplexed I/O systems |
| Fault Response | Auto-retry (tRETRY1 = 0.8 s, tRETRY2 = 1.6 s) - recovers autonomously after overload without host intervention |
| HART Bandwidth | 10 kHz - preserves 1200-baud HART signal integrity across protected analog inputs |
| Thermal Shutdown | 160 °C with 11 °C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design |
Pinout & Package
TPS26614DDFR uses an 8-pin SOT-23-THN (DDF) package measuring 2.9 mm × 1.6 mm, optimized for high-density industrial I/O modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Reference ground | Common return for internal biasing; must connect to system GND plane for stable operation |
| MODE | Overload configuration | Selects current limit mode (32 mA, 60 mA, or extended pulse duration); 180-kΩ pull-down enables 2×IOL |
| –Vs | Negative supply rail | Accepts –20 V to 0 V; tied to GND in unipolar configurations to block reverse current |
| IN | Field-side input | Receives ±20 mA or 4–20 mA loop current; rated for ±55 V absolute max to survive miswiring |
| OUT | System-side output | Drives ADC burden resistor or transmitter load; includes OVLO/UVO protection to prevent downstream damage |
| +Vs | Positive supply rail | Accepts 2.25 V to 30 V; powers internal circuitry and FET gate drive independently of loop current |
| EN | Enable control input | Active-high logic input; internal pullup allows floating = enabled; 10-µA leakage enables low-power standby |
| SGOOD | Fault status indicator | Open-drain output pulled low during normal operation; goes high on fault or startup for system health monitoring |
Key Features
| Feature | Design Value |
|---|---|
| Integrated bipolar current limiting | 32-mA fixed threshold with MODE-selectable 60-mA pulse mode - eliminates need for external current-sense resistors and op-amps |
| Input/output miswiring protection | Automatic cutoff when IN or OUT exceeds ±Vs rails - prevents damage from field wiring errors without external components |
| Auto-retry fault recovery | Two-phase retry timer (0.8 s / 1.6 s) - restores operation after transient overloads without manual reset or host command |
| HART signal transparency | 10-kHz small-signal bandwidth - passes 1200-baud HART digital signals superimposed on 4–20 mA analog without distortion |
| Low loop-side quiescent current | <100 nA IQ - avoids loading precision 4–20 mA loops, preserving measurement accuracy in high-impedance receiver stages |
Applications
| PLC Analog Input Module | HVAC Controller I/O |
|---|---|
|
Use Scenario: Protecting 4–20 mA sensor inputs in modular PLC backplanes exposed to field wiring faults and EFT noise. IC Role / Device Role / Timing Role: Bidirectional current limiter and miswiring guard between field wiring and precision ADC front-end. Use Value: Eliminates discrete TVS diodes and current-sense ICs, reducing BOM count by 4 components per channel while maintaining IEC61000-4-4 compliance. |
Use Scenario: Securing temperature and pressure transducer inputs in HVAC controllers deployed in electrically noisy building environments. IC Role / Device Role / Timing Role: Loop-powered protector with EN-controlled channel enable for maintenance-safe hot-swap diagnostics. Use Value: Enables firmware-triggered channel disable during service, preventing loop disruption to other zones while isolating faulty sensors. |
| Multiplexed Analog I/O Card | Industrial Motor Drive Feedback |
|
Use Scenario: Shared analog input stage accepting both voltage (0–10 V) and current (4–20 mA) signals in compact motion controller I/O cards. IC Role / Device Role / Timing Role: Universal input conditioner with EN pin enabling dynamic reconfiguration between voltage and current modes. Use Value: Reduces PCB area by 50% vs. discrete protection solutions, supporting 16-channel density in 100-mm-wide DIN-rail modules. |
Use Scenario: Safeguarding encoder and resolver feedback lines in servo drives subject to cable-induced surges and ground potential shifts. IC Role / Device Role / Timing Role: Fast-trip protector (5 µs response) that clamps short-circuit currents before gate drivers are damaged. Use Value: Prevents catastrophic failure during motor stall or cable short events, extending mean time between failures by >3× vs. unprotected designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current loop protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS26611DDFR | No auto-retry; latch-off fault response; same EN, MODE, and SGOOD functionality | Suited for safety-critical systems requiring manual reset after fault | Choose TPS26611DDFR when deterministic fault lockout is required and automatic recovery is prohibited. |
| TPS26632DDFR | Higher 60-V rating; 45-mA current limit; no EN pin; single-supply only (3–36 V) | Optimized for 2-wire transmitter protection, not multiplexed I/O | Choose TPS26632DDFR for transmitter-side protection where enable control and bipolar operation are unnecessary. |
Compared with TPS26614DDFR, TPS26611DDFR offers identical pinout and protection features but requires external reset after fault, while TPS26632DDFR trades EN control and auto-retry for higher voltage rating and simplified unipolar supply-making it unsuitable for HART-enabled multiplexed inputs.
Availability
TPS26614DDFR is available at Aetrix Electronics and suitable for factory automation, motor drive feedback, and HVAC controller designs requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial OEM programs.
Supply support for TPS26614DDFR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.
The TPS2661x family was designed specifically for robust, space-efficient protection of industrial current loops-including 4–20 mA, ±20 mA, and HART-capable analog I/O-replacing complex discrete protection circuits with a single integrated solution.
FAQ
What is the maximum continuous operating voltage for TPS26614DDFR?
The TPS26614DDFR supports ±50 V continuous operating voltage on its IN and OUT pins, with ±55 V absolute maximum ratings. This allows direct connection to industrial field wiring without external clamping, protecting against common miswiring conditions such as reversed polarity or accidental connection to higher-voltage sources. The device maintains regulation and protection functionality across this full range when powered within its specified ±2.25 V to ±20 V or 3 V to 30 V supply limits.
How does the EN pin function on TPS26614DDFR?
The EN pin on TPS26614DDFR is an active-high enable input with a 1.72-V rising threshold and internal pullup. When pulled high (≥1.72 V), the device operates normally; when pulled low (<1 V), it disables the pass FET and reduces supply current to 0.27 mA. This allows precise channel-level control in multiplexed I/O systems. The pin draws only ±10 µA leakage, making it compatible with microcontroller GPIOs without additional level-shifting or buffering circuitry.
Does TPS26614DDFR support HART communication?
Yes, TPS26614DDFR is explicitly HART compliant with a 10-kHz small-signal bandwidth. It preserves the 1200-baud HART digital signal superimposed on 4–20 mA analog loops without attenuation or phase shift, meeting the spectral requirements of the HART Physical Layer specification. This capability is validated across temperature and supply variations, ensuring reliable configuration and diagnostics in field instruments connected through TPS26614DDFR-protected inputs.
What fault recovery behavior does TPS26614DDFR implement?
TPS26614DDFR uses auto-retry fault recovery: after an overload event triggers current limiting, it enters a timed off-state (tRETRY1 = 0.8 s), then attempts restart. If the fault persists, it repeats with tRETRY2 = 1.6 s. This continues until the overload clears. Unlike latch-off variants (e.g., TPS26611), TPS26614DDFR requires no external reset signal-enabling autonomous recovery in remote or inaccessible installations where manual intervention is impractical.
Can TPS26614DDFR operate from a single supply?
Yes, TPS26614DDFR supports unipolar supply operation from 3 V to 30 V on +Vs, with –Vs tied to GND. In this configuration, it provides reverse-current blocking for 4–20 mA loops and retains full miswiring protection on IN and OUT. The device draws only 1.07–1.65 mA from +Vs in normal operation and maintains its 32-mA current limit, 7.5-Ω RON, and HART bandwidth-making it suitable for cost-sensitive, space-constrained single-supply industrial I/O designs.
TPS26614DDFR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Current Regulator
- Sensing Method:
- Low-Side
- Accuracy:
- -
- Voltage - Input:
- -50V ~ 50V
- Current - Output:
- 20mA
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
TPS26614DDFR FAQ
1.How can I place an order for TPS26614DDFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS26614DDFR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS26614DDFR reliable?
The price and inventory of TPS26614DDFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS26614DDFR is usually 5 days.
3.What payment methods are accepted for TPS26614DDFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS26614DDFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS26614DDFR?
TPS26614DDFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS26614DDFR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS26614DDFR?
For technical support, including TPS26614DDFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS26614DDFR requirements.
6.How does Aetrix verify that TPS26614DDFR is sourced from the original manufacturer or authorized distributors?
All TPS26614DDFR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS26614DDFR meets industry standards.
7.What is the process for return or replacement of TPS26614DDFR?
All TPS26614DDFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS26614DDFR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS26614DDFR part is unused and in its original packaging.
Return procedure for TPS26614DDFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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