My Inquiry
My Account
Texas Instruments OPA551FA/500G3
- Part No.:
- OPA551FA/500G3
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-263-8, D2PAK (7 Leads + Tab), TO-263CA
- Datasheet:
-
OPA551FA/500G3.pdf
- Description:
- IC OPAMP GP 1 CIRC DDPAK/TO263-7
- Quantity:
- Payment:
- Shipping:
Inventory:697
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA551FA/500G3 from Texas Instruments is a unity-gain stable, high-voltage (±30 V), high-current (200 mA continuous) operational amplifier optimized for telephony, servo, and transducer excitation. It delivers 15 V/µs slew rate, 3 MHz gain-bandwidth product, and 14 nV/√Hz input voltage noise, with rail-to-rail output swing within 2 V of supply rails.
For engineers reviewing the OPA551FA/500G3 datasheet, OPA551FA/500G3 pinout, OPA551FA/500G3 application, or OPA551FA/500G3 equivalent, this page provides verified technical context, package mapping to SOIC-8, thermal shutdown flag behavior, output current capability under load, and validated alternative options for high-voltage op-amp selection.
Technical Context
The OPA551FA/500G3 integrates a laser-trimmed differential input stage, high-current output buffer, and thermal shutdown circuitry with flag output. Its internal current limiting caps output at ±380 mA short-circuit, while thermal protection disables output above ~160°C junction temperature and resets at ~140°C.
It operates across –40°C to +125°C ambient, supports ±4 V to ±30 V supplies, and maintains low offset drift (±7 µV/°C) and high CMRR (92–102 dB). The device is specified for unity-gain stability and drives capacitive loads up to 10 nF with external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±4 V to ±30 V - supports wide industrial and test-equipment power rails without external regulation |
| Continuous Output Current | ±200 mA - drives heavy resistive or reactive loads such as piezoelectric transducers or motor windings |
| Slew Rate | ±15 V/µs - enables fast settling in servo position control and audio driver stages |
| Gain-Bandwidth Product | 3 MHz - ensures stable closed-loop operation at unity gain with adequate phase margin |
| Input Voltage Noise | 14 nV/√Hz at 1 kHz - preserves signal integrity in low-level sensor amplification paths |
| Output Voltage Swing | (V−) + 3 V to (V+) − 3 V at 200 mA - delivers >54 Vpp swing on ±30 V supplies into typical loads |
| Thermal Shutdown Flag | 0.05–1 µA normal / 80–160 µA during shutdown - provides logic-compatible fault indication without external sensing |
Pinout & Package
OPA551FA/500G3 is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) with body size 4.9 mm × 3.91 mm. The exposed pad is not present; thermal dissipation relies on PCB copper area connected to V− via Pin 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: V− | Negative supply terminal | Primary return path for output current and bias; connects internally to thermal flag reference and exposed tab in DDPAK variant (not applicable to SOIC) |
| 2: −IN | Inverting input | Differential input node; accepts signals referenced to common-mode range (V−)+2.5 V to (V+)-2.5 V |
| 3: +IN | Noninverting input | Differential input node; matched to −IN for <±3 mV offset and <±100 pA bias current |
| 4: V− | Negative supply terminal (duplicate) | Second V− connection for improved PSRR and reduced ground bounce in high-current switching |
| 5: NC | No internal connection | Unbonded die pad; must be left floating or tied to V− for mechanical stability-no electrical function |
| 6: OUT | Amplifier output | Class-AB output stage capable of sourcing/sinking 200 mA continuously; requires local 0.1 µF bypassing |
| 7: V+ | Positive supply terminal | Highest potential rail; supplies internal bias and output stage; must be decoupled near pin |
| 8: Flag | Thermal shutdown indicator | Open-collector current source: <1 µA normal mode, ~120 µA during thermal shutdown-interfaced directly to CMOS/HCT logic |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stability | Guaranteed stable with no external compensation in G = 1 configurations-reduces BOM count and layout risk |
| Fully protected architecture | Integrated thermal shutdown, output current limiting (±380 mA), and input clamp diodes-eliminates need for discrete protection circuits |
| Rail-swing output stage | Delivers output within 3 V of either rail at full 200 mA load-maximizes dynamic range in ±15 V or ±30 V systems |
| Laser-trimmed precision | Initial input offset voltage ≤±3 mV and drift ≤±7 µV/°C-enables accurate DC-coupled servo and measurement loops |
| Low-noise, high-speed combination | 14 nV/√Hz noise density with 15 V/µs slew rate-supports high-fidelity signal conditioning in audio and instrumentation |
Applications
| Telephony Line Driver | High-Voltage Test Equipment |
|---|---|
Use Scenario: Driving balanced analog telephone lines over long distances with programmable gain and impedance matching. IC Role / Device Role / Timing Role: Final-stage line driver amplifier providing ±24 V swing into 600 Ω or complex reactive loads. Use Value: Delivers 200 mA peak current and 3 MHz bandwidth to meet ITU-T G.711 distortion requirements without external boost transistors. |
Use Scenario: Generating calibrated high-voltage stimulus waveforms (e.g., ±20 V sine/triangle) for component parametric testing. IC Role / Device Role / Timing Role: Precision output buffer in automated test equipment (ATE) source-measure units (SMUs). Use Value: Maintains <0.0005% THD+N at 15 VRMS and drives capacitive DUT loads up to 10 nF with stable step response. |
| Audio Power Amplifier | Servo Motor Excitation |
Use Scenario: Low-power Class-AB headphone or small loudspeaker driver in portable audio analyzers. IC Role / Device Role / Timing Role: Single-supply or split-supply output stage delivering clean 200 mA into 8 Ω or 32 Ω loads. Use Value: 14 nV/√Hz noise floor and 15 V/µs slew rate enable >105 dB SNR and distortion-free 20 kHz reproduction. |
Use Scenario: Driving electromagnetic actuators or voice coil motors requiring precise bipolar current control and fast transient response. IC Role / Device Role / Timing Role: High-current error amplifier in closed-loop current-mode servo drivers. Use Value: Thermal flag alerts system controller before overheating, enabling graceful current derating-critical for motion control safety compliance. |
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 |
|---|---|---|---|
| OPA552FA/500G3 | Optimized for G ≥ 5; 24 V/µs slew rate, 12 MHz GBW, not unity-gain stable | Better suited for fixed-gain instrumentation or RF buffer stages where gain >5 is acceptable | Select OPA552FA/500G3 only when closed-loop gain is ≥5 and higher speed outweighs loss of unity-gain flexibility |
| OPA547TP | Higher output current (500 mA), programmable current limit, disable pin, TO-220 package | Targeted at industrial power amplification with safety-critical current limiting and thermal monitoring | Choose OPA547TP when >200 mA drive, user-configurable current limit, or through-hole mounting is required |
Compared with OPA551FA/500G3, the OPA552FA/500G3 trades unity-gain stability for higher bandwidth and slew rate, while the OPA547TP adds programmable current limiting and higher output current at the cost of larger footprint and no thermal flag output-making OPA551FA/500G3 optimal for compact, unity-gain, thermally monitored high-voltage amplification.
Availability
OPA551FA/500G3 is available at Aetrix Electronics and suitable for telephony line drivers, high-voltage test equipment, audio power amplifiers, and servo motor excitation requiring stable component supply across extended temperature ranges.
Supply support for OPA551FA/500G3 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The OPA55x family was designed specifically for high-voltage, high-current linear amplification in industrial test, telecom infrastructure, and motion control-emphasizing ruggedness, thermal intelligence, and ease of use in demanding analog signal chains.
FAQ
What is the maximum continuous output current of the OPA551FA/500G3?
The OPA551FA/500G3 delivers ±200 mA continuous output current into resistive loads at TJ ≤ 125°C with proper heatsinking. Short-circuit current is ±380 mA, but sustained operation above 200 mA requires thermal derating per RθJA = 96.7°C/W (SOIC-8). The OPA551FA/500G3 must be used within its Safe Operating Area (SOA) curve to avoid thermal runaway.
Does the OPA551FA/500G3 require external compensation for unity-gain stability?
No, the OPA551FA/500G3 is internally compensated for unity-gain stability and operates stably with no external components in G = 1 configurations. However, driving capacitive loads >100 pF may require series resistance or feedback network adjustments to maintain phase margin-refer to Figure 19 and Figure 28 in the SBOS100B datasheet for proven layouts.
How does the thermal shutdown flag (Pin 8) function on the OPA551FA/500G3?
The Flag pin on the OPA551FA/500G3 is an open-collector current source that outputs <1 µA during normal operation and 80–160 µA when junction temperature exceeds ~160°C. It can directly interface with CMOS or HCT logic using a pull-up resistor (e.g., 27 kΩ to +5 V), providing real-time thermal fault detection without external comparators or sensors.
Can the OPA551FA/500G3 operate from a single supply?
Yes, the OPA551FA/500G3 supports single-supply operation with V+ = +60 V and V− = GND (0 V), provided the input common-mode range (V−)+2.5 V to (V+)−2.5 V and output swing limits are respected. Input biasing and level-shifting networks are required to keep signals within valid ranges-see Section 8.1 of SBOS100B for noninverting amplifier examples.
What is the input offset voltage specification for the OPA551FA/500G3 over temperature?
The OPA551FA/500G3 has a maximum input offset voltage of ±5 mV over the full operating temperature range (–40°C to +125°C), with typical value ±1 mV at 25°C. Its offset drift is specified at ±7 µV/°C max, ensuring predictable DC error accumulation in precision closed-loop systems like servo position controllers or calibrated sensor front-ends.
OPA551FA/500G3 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)
OPA551FA/500G3 FAQ
1.How can I place an order for OPA551FA/500G3 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA551FA/500G3 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 OPA551FA/500G3 reliable?
The price and inventory of OPA551FA/500G3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA551FA/500G3 is usually 5 days.
3.What payment methods are accepted for OPA551FA/500G3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA551FA/500G3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA551FA/500G3?
OPA551FA/500G3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA551FA/500G3 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 OPA551FA/500G3?
For technical support, including OPA551FA/500G3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA551FA/500G3 requirements.
6.How does Aetrix verify that OPA551FA/500G3 is sourced from the original manufacturer or authorized distributors?
All OPA551FA/500G3 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 OPA551FA/500G3 meets industry standards.
7.What is the process for return or replacement of OPA551FA/500G3?
All OPA551FA/500G3 units undergo pre-shipment inspection (PSI). If there is an issue with OPA551FA/500G3, 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 OPA551FA/500G3 part is unused and in its original packaging.
Return procedure for OPA551FA/500G3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA551FA/500G3 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
