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Texas Instruments TPS26611DDFR
- Part No.:
- TPS26611DDFR
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
TPS26611DDFR.pdf
- Description:
- IC CURRENT REGULATOR TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:7,968
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Product details
Overview
TPS26611DDFR from Texas Instruments is a universal ±20 mA / 4–20 mA current loop protector IC with integrated bipolar 32-mA current limit, ±50-V operating voltage, 7.5-Ω typical RON, EN pin control, and SGOOD fault indicator-designed for analog input/output modules in PLCs and industrial sensor transmitters.
For engineers reviewing the TPS26611DDFR datasheet, TPS26611DDFR pinout, TPS26611DDFR application, or TPS26611DDFR equivalent, this device delivers verified miswiring protection on both IN and OUT terminals, HART-compliant bandwidth (10 kHz), fast-trip response (5 µs), and configurable overload timing via MODE pin-critical for multiplexed current/voltage I/O and analog output protection.
Technical Context
The TPS26611DDFR implements dual-stage overcurrent protection: a precision 32-mA bidirectional current limiter with MODE-selectable 2× startup limit (±64 mA) and extended expiry (5 s), plus a dedicated fast-trip comparator triggering within 5 µs at ±140–275 mA. It supports unipolar (3–30 V) and bipolar (±2.25–20 V) supply operation while drawing <100 nA from the loop when externally powered.
Its functional architecture integrates independent IN/OUT undervoltage/overvoltage cutoff (e.g., OUT UVLO at –Vs – 0.2 V, OVLO at +Vs + 0.3 V), thermal shutdown (160 °C), and robust EFT/surge immunity (IEC61000-4-4/4-5 with external TVS). The EN pin enables system-level power sequencing, and SGOOD provides active-low health monitoring with 6.3-kΩ pull-down impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Voltage | ±50 V continuous; ±55 V absolute max - withstands field-side transients without latch-off |
| Bipolar Current Limit | ±32 mA typical - precise regulation for 4–20 mA and ±20 mA loops, minimizing burden resistor heating |
| RON | 7.5 Ω typical - limits voltage drop to ≤1.5 V at 20 mA, extending usable supply headroom |
| EN Control Threshold | VENR = 1.72 V, VENF = 1.0 V - compatible with 1.8-V/3.3-V logic for clean enable/disable sequencing |
| SGOOD Output | Active-low open-drain with 6.3-kΩ internal pull-down - drives LED or microcontroller interrupt directly |
| HART Bandwidth | 10 kHz - preserves 1200-baud HART signal integrity across protected loop path |
| Fast-Trip Response | 5 µs - shuts off FET before destructive energy accumulates during short-circuit or hot-plug events |
Pinout & Package
TPS26611DDFR is housed in an 8-pin SOT-23-THN (DDF) package measuring 2.9 mm × 1.6 mm - enabling high-density placement in space-constrained analog I/O modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Reference ground | Common return for all internal biasing; must connect to system GND, not floating |
| MODE | Overload configuration | Selects 32 mA / 64 mA limit and 100 ms / 5 s expiry via resistor or direct tie; determines auto-retry behavior |
| –Vs | Negative supply rail | Required for bipolar operation; tied to GND for unipolar 4–20 mA use cases |
| IN | Field-side input | Accepts ±50 V signals; blocks reverse current when –Vs = GND and IN goes negative |
| OUT | System-side output | Drives ADC or transmitter; cuts off if voltage exceeds +Vs + 0.3 V or falls below –Vs – 0.2 V |
| +Vs | Positive supply rail | Accepts 3–30 V unipolar or ±2.25–20 V bipolar; powers internal circuitry and FET gate drive |
| EN | Enable control | Pull low to disable pass FET; internal pull-up allows floating = enabled; supports dynamic channel gating |
| SGOOD | Fault status indicator | Low = normal operation; high = fault (overload, UV/OV, thermal); debounced with 685 µs/1.3 ms deglitch |
Key Features
| Feature | Design Value |
|---|---|
| Miswiring protection on IN and OUT | Automatically disables current path if IN or OUT exceeds ±Vs rails - prevents damage from reversed field wiring |
| Configurable overload timing | MODE pin selects 100-ms or 5-s overload expiry and latch-off vs. auto-retry recovery - matches transmitter startup profiles |
| Loop-powered operation support | Draws <100 nA from loop when externally powered - eliminates measurement error from parasitic loop current |
| IEC61000-4-4/4-5 transient resilience | With external TVS, sustains 4-kV surge (line-earth) and 4-kV EFT bursts - reduces need for board-level protection components |
| HART signal transparency | 10-kHz small-signal bandwidth preserves 1200-baud digital overlay on 4–20 mA analog - no protocol interference |
Applications
| PLC Analog Input Module | Multiplexed Voltage/Current Input |
|---|---|
|
Use Scenario: Protecting 4–20 mA sensor inputs in modular I/O cards where field wiring polarity is uncontrolled. IC Role / Device Role / Timing Role: Bidirectional current limiter and miswiring detector placed between field connector and precision burden resistor/ADC. Use Value: Eliminates need for discrete diode bridges and TVS arrays; maintains ±0.1% current accuracy with 7.5-Ω RON. |
Use Scenario: Shared input channel accepting either 0–10 V or 4–20 mA signals in compact industrial controllers. IC Role / Device Role / Timing Role: EN-controlled protection switch enabling software-selectable signal path routing and fault isolation. Use Value: Enables single-channel hardware reuse; EN pin allows dynamic switching without mechanical relays or extra mux ICs. |
| Analog Output Protection | HART Input Interface |
|
Use Scenario: Safeguarding 4–20 mA outputs driving remote actuators subject to cable shorts or reverse connections. IC Role / Device Role / Timing Role: Output-side protector that monitors OUT voltage and disables FET if it exceeds +Vs + 0.3 V or drops below –Vs – 0.2 V. Use Value: Prevents output stage destruction during field faults; SGOOD provides real-time diagnostics to host controller. |
Use Scenario: Conditioning HART signals entering a smart transmitter or field device interface. IC Role / Device Role / Timing Role: Low-distortion current path with 10-kHz bandwidth and <100-nA loop leakage - preserving HART modulation fidelity. Use Value: Ensures reliable digital communication over analog loop without signal attenuation or harmonic distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current loop protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS26612DDFR | Supports extended 5-s overload expiry and auto-retry; lacks EN pin; optimized for 2-wire transmitter supply protection | Targeted at power supply side of transmitters rather than signal I/O; no enable control for channel gating | Choose TPS26612DDFR when protecting transmitter power rails with long-duration overload tolerance is required |
| TPS26614DDFR | Includes EN pin and auto-retry; same pinout and RON; differs in UVLO behavior (OUT-only UV detection) | Designed for multiplexed I/O where output-side undervoltage is critical but input-side UV is not monitored | Choose TPS26614DDFR when system requires auto-retry recovery and only output-rail undervoltage protection is needed |
Compared with TPS26611DDFR, TPS26612DDFR trades EN control for extended overload timing and latch-off behavior, while TPS26614DDFR retains EN and adds auto-retry but omits input-side undervoltage detection - making TPS26611DDFR optimal for EN-gated multiplexed I/O with full IN/OUT fault coverage.
Availability
TPS26611DDFR is available at Aetrix Electronics and suitable for factory automation PLCs, motor drive analog I/O, and HVAC controller designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TPS26611DDFR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The TPS2661x family was engineered specifically for robust current-loop protection in process automation - integrating miswiring resilience, HART compatibility, and programmable overload response into a space-efficient 8-pin SOT-23 package.
FAQ
What is the maximum continuous operating voltage for TPS26611DDFR?
The TPS26611DDFR supports ±50 V continuous operating voltage on its IN and OUT pins, with ±55 V listed as absolute maximum rating. This enables direct interfacing with industrial field wiring without external clamping, provided external TVS devices are used for IEC61000-4-5 surge compliance. The ±50-V rating is validated across –40 °C to +125 °C junction temperature range.
How does the MODE pin affect overload behavior in TPS26611DDFR?
The MODE pin on TPS26611DDFR configures three key overload parameters: (1) nominal current limit (32 mA or 64 mA), (2) overload expiry time (100 ms or 5 s), and (3) recovery mode (latch-off or auto-retry). When tied to GND, it sets 32 mA / 100 ms / latch-off; when open or pulled to 180 kΩ, it enables 64 mA / 5 s / auto-retry - matching two-wire transmitter startup requirements.
Can TPS26611DDFR be used in unipolar 4–20 mA systems?
Yes, TPS26611DDFR operates in unipolar mode by connecting –Vs to GND and applying +Vs between 3 V and 30 V. In this configuration, it blocks reverse current flow (OUT → IN) when IN goes negative, supports 4–20 mA loop integrity, draws <100 nA from the loop, and maintains HART signal transparency up to 10 kHz - making it ideal for analog input modules with shared power domains.
What is the purpose of the SGOOD pin on TPS26611DDFR?
The SGOOD pin on TPS26611DDFR is an active-low open-drain fault indicator that asserts high during any fault condition - including overload, input/output overvoltage/undervoltage, thermal shutdown, or startup inrush. With a 6.3-kΩ internal pull-down, it can directly drive an LED or microcontroller GPIO. Its 685-µs assertion and 1.3-ms de-assertion deglitch filters noise while ensuring reliable system health monitoring.
Does TPS26611DDFR support HART communication?
Yes, TPS26611DDFR is explicitly HART compliant with a 10-kHz small-signal bandwidth, verified under ±25 mA conditions with 1-mApp excitation at 1-kΩ load. Its <100-nA loop leakage and 7.5-Ω RON ensure minimal amplitude attenuation and phase shift - preserving the 1200-baud digital overlay on 4–20 mA analog signals without requiring recalibration or additional signal conditioning.
TPS26611DDFR 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:
- -
- Accuracy:
- -
- Voltage - Input:
- -50V ~ 50V
- Current - Output:
- -
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
TPS26611DDFR FAQ
1.How can I place an order for TPS26611DDFR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS26611DDFR 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 TPS26611DDFR reliable?
The price and inventory of TPS26611DDFR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS26611DDFR is usually 5 days.
3.What payment methods are accepted for TPS26611DDFR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS26611DDFR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS26611DDFR?
TPS26611DDFR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS26611DDFR 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 TPS26611DDFR?
For technical support, including TPS26611DDFR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS26611DDFR requirements.
6.How does Aetrix verify that TPS26611DDFR is sourced from the original manufacturer or authorized distributors?
All TPS26611DDFR 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 TPS26611DDFR meets industry standards.
7.What is the process for return or replacement of TPS26611DDFR?
All TPS26611DDFR units undergo pre-shipment inspection (PSI). If there is an issue with TPS26611DDFR, 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 TPS26611DDFR part is unused and in its original packaging.
Return procedure for TPS26611DDFR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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