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Texas Instruments OPA551FAKTWTG3
- Part No.:
- OPA551FAKTWTG3
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
OPA551FAKTWTG3.pdf
- Description:
- IC OPAMP GP 1 CIRC DDPAK/TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:385
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Product details
Overview
OPA551FAKTWTG3 from Texas Instruments is a unity-gain stable, high-voltage (±30 V), high-current (200 mA continuous) operational amplifier in a 7-pin DDPAK/TO-263 surface-mount package. It delivers 15 V/µs slew rate, 3 MHz bandwidth, and 14 nV/√Hz input voltage noise, with thermal shutdown flag output and rail-to-rail output swing within 2 V of supply rails. It is used in servo drivers, transducer excitation, and test equipment requiring robust output drive and precision at high voltage.
For engineers reviewing the OPA551FAKTWTG3 datasheet, OPA551FAKTWTG3 pinout, OPA551FAKTWTG3 application, or OPA551FAKTWTG3 equivalent, key selection criteria include its ±4 V to ±30 V supply range, 200 mA continuous output current, thermal shutdown indicator functionality, unity-gain stability, and DDPAK-7 thermal performance (RθJA = 22.7 °C/W).
Technical Context
The OPA551FAKTWTG3 integrates a laser-trimmed differential input stage, high-current output stage, and dedicated thermal shutdown circuitry with a current-source flag output. Its internal current limiting (±380 mA short-circuit) and thermal protection (shutdown at ~160 °C, reset at ~140 °C) operate independently of external control.
It features fully differential input architecture with 1013 Ω || 2 pF differential impedance and 92–102 dB CMRR over –27.5 V to +27.5 V common-mode range. The device maintains 110–126 dB open-loop gain (AOL) across temperature and load conditions while delivering full output swing under 200 mA DC load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | ±4 V to ±30 V - supports industrial high-voltage rails without external regulation |
| Output Current | ±200 mA continuous - drives reactive loads, solenoids, and piezoelectric transducers directly |
| Slew Rate | ±15 V/µs - enables fast settling for step-driven test signals and audio transients |
| Bandwidth | 3 MHz gain-bandwidth product - sustains closed-loop stability at unity gain with capacitive loads up to 10 nF |
| Noise Density | 14 nV/√Hz at 1 kHz - preserves signal integrity in low-level sensor excitation and precision measurement |
| Thermal Flag | 0.05–1 µA normal / 80–160 µA shutdown - provides logic-compatible fault signaling without external sensing |
| Output Swing | (V−) + 3 V to (V+) − 3 V at 200 mA - delivers >54 V peak-to-peak swing into 300 Ω with ±30 V supplies |
| Operating Temp | −40 °C to +125 °C - qualified for extended industrial environments including motor control enclosures |
Pinout & Package
The OPA551FAKTWTG3 is housed in a 7-pin DDPAK/TO-263 surface-mount package with exposed thermal tab connected internally to the V− pin. This thermally enhanced construction achieves RθJC(bot) = 0.6 °C/W and RθJA = 22.7 °C/W, enabling high-power operation without external heatsink in moderate airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Tab) | Power Ground / Thermal Path | Internally bonded to V−; must be soldered to PCB copper pour for thermal conduction |
| 1 (Pin) | Inverting Input (−IN) | Differential input node; high-impedance (10¹³ Ω), protected by internal clamp diodes |
| 2 | Noninverting Input (+IN) | Differential input node; matched bias current (±20 pA typ) minimizes offset drift |
| 3 | No Connect (NC) | Unbonded die pad; electrically isolated - leave floating or ground for EMI reduction |
| 4 | Output (OUT) | Class-AB output stage capable of sourcing/sinking 200 mA continuously with <0.0005% THD+N |
| 5 | Positive Supply (V+) | Highest potential rail; requires local 0.1 µF ceramic bypass capacitor adjacent to pin |
| 6 | Flag Output | Open-collector current source; sinks 120 µA (typ) during thermal shutdown for microcontroller interrupt |
| 7 | Negative Supply (V−) | Lowest potential rail; tied internally to exposed tab - forms primary thermal and electrical return path |
Key Features
| Feature | Design Value |
|---|---|
| Unity-Gain Stability | Guaranteed stable at G = 1 with no external compensation - simplifies design for buffer and follower configurations |
| Thermal Shutdown Indicator | Current-source flag pin (80–160 µA) enables direct interface to HCT/CMOS logic without level-shifting components |
| Rail-to-Rail Output Swing | Delivers (V−) + 3 V to (V+) − 3 V at full 200 mA load - maximizes dynamic range in ±15 V and ±30 V systems |
| Input Protection | Internal clamp diodes allow safe operation with inputs up to (V−) − 0.5 V and (V+) + 0.5 V - reduces need for external series resistors |
| Laser-Trimmed Precision | ±1 mV max input offset voltage (25 °C), ±5 mV over −40 °C to +125 °C - ensures accuracy in closed-loop transducer control |
| High PSRR & CMRR | 30 µV/V PSRR and 92–102 dB CMRR - rejects supply ripple and common-mode interference in noisy industrial environments |
Applications
| Audio Amplifier Driver | Servo Motor Excitation |
|---|---|
Use Scenario: Driving high-impedance headphones or line-level analog outputs in professional audio test gear with minimal distortion. IC Role / Device Role / Timing Role: Unity-gain buffer amplifying DAC output while maintaining wide bandwidth and low noise floor. Use Value: Delivers 0.0005% THD+N at 15 VRMS, enabling accurate characterization of downstream audio components. | Use Scenario: Providing precise, high-current excitation to voice coil actuators and torque motors in closed-loop motion control systems. IC Role / Device Role / Timing Role: High-swing current driver translating PWM-filtered control voltage into bidirectional force output. Use Value: Sustains ±200 mA at ±30 V with 15 V/µs slew rate, ensuring fast position response without phase lag in feedback loops. |
| Transducer Excitation | High-Voltage Test Equipment |
Use Scenario: Biasing piezoelectric sensors, ultrasonic transmitters, and MEMS resonators requiring clean, high-voltage AC excitation. IC Role / Device Role / Timing Role: Precision voltage source generating calibrated sine or square waveforms up to 60 VPP. Use Value: Achieves 14 nV/√Hz noise density and ±3 mV offset, preserving SNR in low-amplitude sensor response measurements. | Use Scenario: Generating programmable DC and transient test voltages in automated test equipment (ATE) for power electronics validation. IC Role / Device Role / Timing Role: Programmable high-voltage output stage controlled via DAC and op-amp feedback network. Use Value: Supports ±30 V operation with thermal flag monitoring, enabling safe, unattended long-duration stress testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage, high-current operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA552FAKTWTG3 | Optimized for G ≥ 5; 24 V/µs slew rate, 12 MHz GBW, not unity-gain stable | Preferred in fixed-gain instrumentation where higher speed outweighs stability flexibility | Select OPA552FAKTWTG3 only when gain ≥ 5 is fixed and thermal flag functionality is retained |
| OPA547TP | Higher voltage (±40 V), programmable current limit (10–500 mA), disable pin, TO-220 package | Better suited for variable-current, high-reliability power stages with safety interlocks | Choose OPA547TP when adjustable current limiting, wider supply range, or through-hole mounting is required |
Compared with OPA552FAKTWTG3 and OPA547TP, the OPA551FAKTWTG3 uniquely balances unity-gain stability, integrated thermal flag signaling, and DDPAK-7 thermal efficiency - making it optimal for space-constrained, self-protecting servo and test equipment designs.
Availability
OPA551FAKTWTG3 is available at Aetrix Electronics and suitable for servo drivers, transducer excitation, and high-voltage test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA551FAKTWTG3 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 OPA55x product line was designed specifically for high-voltage, high-current analog output stages in precision test, actuation, and signal conditioning systems - emphasizing thermal resilience, output protection, and laser-trimmed DC accuracy.
FAQ
What is the maximum continuous output current of the OPA551FAKTWTG3?
The OPA551FAKTWTG3 delivers ±200 mA continuous output current into resistive or reactive loads at ±30 V supply, with thermal shutdown activating above ~160 °C junction temperature. This rating is validated across the full −40 °C to +125 °C operating range and remains stable under capacitive loading up to 10 nF when properly compensated.
Does the OPA551FAKTWTG3 require external compensation for unity-gain operation?
No, the OPA551FAKTWTG3 is internally compensated for unity-gain stability and operates stably with G = 1 without external components. Its 3 MHz gain-bandwidth product and 15 V/µs slew rate are specified under unity-gain conditions, and the device maintains phase margin >45° with 100 pF capacitive load per the datasheet small-signal step response data.
How does the thermal shutdown flag pin function on the OPA551FAKTWTG3?
The flag pin on the OPA551FAKTWTG3 is a current-source output that sources 80–160 µA (typical 120 µA) during thermal shutdown, and less than 1 µA during normal operation. It interfaces directly with HCT or CMOS logic using a pull-up resistor (e.g., 27 kΩ for 5 V logic), providing an immediate hardware interrupt signal without ADC conversion or software polling of the OPA551FAKTWTG3 status.
Can the OPA551FAKTWTG3 drive capacitive loads, and what is the recommended approach?
Yes, the OPA551FAKTWTG3 can drive capacitive loads up to 10 nF using the external compensation network shown in Figure 28 of the datasheet: a 1.8 nF capacitor (CS) from output to inverting input and a 220 pF capacitor (CF) from inverting input to ground. This configuration preserves phase margin and eliminates peaking in the small-signal step response, as verified in Figure 19 and Figure 22 of the OPA551FAKTWTG3 datasheet.
What is the input offset voltage specification for the OPA551FAKTWTG3 over temperature?
The OPA551FAKTWTG3 has a maximum input offset voltage of ±3 mV at 25 °C and ±5 mV over the full −40 °C to +125 °C operating range. Its offset drift is ±7 µV/°C maximum, and production distribution shows >95% of units fall within ±1.2 mV at room temperature, as confirmed in Figure 17 of the SBOS100B datasheet.
OPA551FAKTWTG3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 15V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 7mA
- Current - Output / Channel:
- 200 mA
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 60 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263 (DDPAK-7)
OPA551FAKTWTG3 FAQ
1.How can I place an order for OPA551FAKTWTG3 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA551FAKTWTG3 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 OPA551FAKTWTG3 reliable?
The price and inventory of OPA551FAKTWTG3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA551FAKTWTG3 is usually 5 days.
3.What payment methods are accepted for OPA551FAKTWTG3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA551FAKTWTG3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA551FAKTWTG3?
OPA551FAKTWTG3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA551FAKTWTG3 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 OPA551FAKTWTG3?
For technical support, including OPA551FAKTWTG3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA551FAKTWTG3 requirements.
6.How does Aetrix verify that OPA551FAKTWTG3 is sourced from the original manufacturer or authorized distributors?
All OPA551FAKTWTG3 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 OPA551FAKTWTG3 meets industry standards.
7.What is the process for return or replacement of OPA551FAKTWTG3?
All OPA551FAKTWTG3 units undergo pre-shipment inspection (PSI). If there is an issue with OPA551FAKTWTG3, 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 OPA551FAKTWTG3 part is unused and in its original packaging.
Return procedure for OPA551FAKTWTG3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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