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Texas Instruments OPA743NA/250G4
- Part No.:
- OPA743NA/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA743NA/250G4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,850
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Product details
Overview
OPA743NA/250G4 from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for 3.5V–12V single-supply or ±1.75V–±6V dual-supply operation. It delivers 7MHz gain-bandwidth, 10V/µs slew rate, 1.1mA quiescent current, 1pA input bias current, and output swing within 100mV of rails under light load - enabling high-precision buffering in LCD gamma correction and portable instrumentation.
For engineers reviewing the OPA743NA/250G4 datasheet, OPA743NA/250G4 pinout, OPA743NA/250G4 application, or OPA743NA/250G4 equivalent, key selection criteria include rail-to-rail I/O performance at 12V, low-power operation with full AC specs over –40°C to +85°C, SOT23-5 package constraints, and verified compatibility with capacitive loads up to 1000pF.
Technical Context
The OPA743NA/250G4 employs a complementary N/P-channel input stage enabling rail-to-rail common-mode range extending 100mV beyond supply rails, with a defined 500mV transition region where both pairs conduct. Its class AB output stage supports 20mA continuous output current and drives 1kΩ loads while maintaining ≥86dB open-loop gain.
It is unity-gain stable and specified across full supply (3.5V–12V) and temperature (–40°C to +85°C) ranges. Input protection diodes clamp signals exceeding rails by >300mV, requiring ≤10mA external current limiting - confirmed in absolute maximum ratings and application circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 7MHz - enables stable closed-loop operation up to ~5MHz in G=+2 configuration with phase margin >60° |
| Slew Rate | 10V/µs - supports 5V step settling in 9µs (0.1%) for signal conditioning in data acquisition |
| Input Bias Current | 1pA typical - preserves accuracy in high-impedance sensor interfaces and transducer amplifiers |
| Output Voltage Swing | Within 100mV of rails (RL = 100kΩ) - maximizes dynamic range in 3.3V/5V/12V single-supply systems |
| Quiescent Current | 1.1mA per amplifier - allows battery-powered operation >100 hours with 3.7V Li-ion cell |
| CMRR | 84dB typical at 25°C - rejects power supply noise in automotive audio and sensor front-ends |
| THD+N | 0.0008% at 6kHz - meets fidelity requirements for LCD reference buffering and test equipment |
Pinout & Package
SOT23-5 surface-mount package (5-pin, 2.9mm × 1.6mm footprint, 1.0mm height), RoHS-compliant, MSL Level-2-260°C-1 year, marked "D43".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V–) | Negative supply | Reference for internal biasing; must be bypassed with 1000pF ceramic + 1µF tantalum |
| 2 (–In) | Inverting input | Differential node accepting signals from (V–)–0.1V to (V+)+0.1V; protected by ESD diodes |
| 3 (Out) | Amplifier output | Capable of sourcing/sinking ±20mA; swings to within 100mV of V+ or V– under light load |
| 4 (V+) | Positive supply | Accepts 3.5V–12V single or ±1.75V–±6V dual; thermal resistance θJA = 200°C/W |
| 5 (+In) | Non-inverting input | High-impedance node (5TΩ || 4pF); offset voltage drift ±8µV/°C over full temperature range |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Common-mode range extends 100mV beyond V+ and V–, enabling direct interface with unbuffered DAC outputs |
| Low-input-bias-current CMOS process | 1pA typical IB ensures <1µV error in 1MΩ source impedance applications like piezoelectric transducers |
| 12V operation capability | Full AC/DC specs guaranteed up to 12V supply - critical for LCD gamma reference buffers requiring wide headroom |
| Capacitive load drive | Stable with up to 1000pF pure capacitance; 20Ω series resistor in feedback loop improves settling with >100nF loads |
| Thermal performance | θJA = 200°C/W in SOT23-5 allows 1.1mA operation at +85°C ambient without derating |
Applications
| LCD Gamma Correction Reference Buffer | Portable Data Acquisition Front-End |
|---|---|
Use Scenario: Driving 6–8 parallel LCD source driver ICs requiring precise, low-noise analog reference voltages across 0–10V range. IC Role / Device Role / Timing Role: Rail-to-rail output buffer for DAC-generated gamma voltage ladder; maintains linearity under 1kΩ effective load. Use Value: 100mV rail swing and 0.0008% THD+N preserve grayscale fidelity; 1.1mA IQ extends battery life in handheld displays. | Use Scenario: Amplifying low-level sensor outputs (e.g., thermocouples, strain gauges) in handheld test meters. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with high CMRR to reject supply noise in battery-powered instruments. Use Value: 84dB CMRR and 1pA IB minimize offset errors; 7MHz GBW supports anti-alias filtering up to 1MHz. |
| Automotive Audio Line Driver | Transducer Signal Conditioning |
Use Scenario: Buffering audio DAC outputs to speaker amplifiers or active crossovers in infotainment systems. IC Role / Device Role / Timing Role: Unity-gain stable voltage follower isolating DAC from cable capacitance and EMI coupling. Use Value: 10V/µs slew rate prevents slew-induced distortion on 20kHz full-scale signals; rail-to-rail I/O avoids clipping near supply limits. | Use Scenario: Amplifying high-impedance outputs from piezoelectric accelerometers or MEMS microphones. IC Role / Device Role / Timing Role: Low-noise, high-Z input stage converting charge/voltage with minimal loading. Use Value: 5TΩ input impedance and 30nV/√Hz voltage noise preserve SNR; 12V supply headroom accommodates large transducer swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Zero-drift architecture; 17µV max VOS vs. ±7mV for OPA743NA/250G4; 350kHz GBW vs. 7MHz | Better DC precision but lower speed; unsuitable for >100kHz signal paths or gamma correction timing | Select OPA333AIDBVR only when µV-level offset stability outweighs bandwidth needs |
| MCP6001T-E/OT | 1MHz GBW, 0.6V/µs slew rate, 100µA IQ; SOT23-5 package; rail-to-rail I/O | Lower power and cost, but insufficient speed/noise performance for LCD reference or audio line driving | Choose MCP6001T-E/OT for simple sensor buffering where 7MHz is unnecessary and 1.1mA IQ is prohibitive |
Compared with OPA333AIDBVR and MCP6001T-E/OT, the OPA743NA/250G4 uniquely balances 7MHz bandwidth, rail-to-rail operation at 12V, and 1.1mA quiescent current - making it irreplaceable in high-fidelity, medium-speed analog signal chains where both precision and speed are required.
Availability
OPA743NA/250G4 is available at Aetrix Electronics and suitable for LCD panel manufacturing, portable instrumentation, and automotive infotainment systems requiring stable component supply with full industrial temperature support (–40°C to +85°C).
Supply support for OPA743NA/250G4 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 with emphasis on reliability, precision, and power efficiency.
The OPA743 family belongs to TI's precision op amp product line, engineered specifically for high-speed, rail-to-rail signal conditioning in space-constrained, battery-sensitive, and wide-supply applications including display interfaces and portable measurement tools.
FAQ
What is the maximum supply voltage rating for OPA743NA/250G4?
The absolute maximum supply voltage for OPA743NA/250G4 is 13.2V between V+ and V– pins. Continuous operation is specified from 3.5V to 12V, with full electrical performance guaranteed across this range at temperatures from –40°C to +85°C. Exceeding 13.2V risks permanent damage per the Absolute Maximum Ratings table in SBOS201.
Does OPA743NA/250G4 support true rail-to-rail input beyond the supply rails?
Yes, OPA743NA/250G4 features a complementary input stage allowing common-mode voltage range from (V–) – 0.1V to (V+) + 0.1V at 25°C. This 100mV beyond-rail capability is confirmed in the Electrical Characteristics table and Application Information section, enabling direct connection to overvoltage-safe sensors without level-shifting.
Can OPA743NA/250G4 drive heavy capacitive loads without oscillation?
OPA743NA/250G4 is stable with up to 1000pF pure capacitive load in unity-gain configuration. For loads >100pF, TI recommends adding a 10Ω–20Ω series resistor inside the feedback loop (as shown in Figure 4 of SBOS201) to suppress ringing while preserving DC accuracy - a validated method documented in the Capacitive Load and Stability section.
What is the thermal resistance (θJA) of the OPA743NA/250G4 package?
The OPA743NA/250G4 uses a SOT23-5 package with a junction-to-ambient thermal resistance (θJA) of 200°C/W, as specified in the Electrical Characteristics table. This value assumes standard JEDEC 2-layer board conditions and confirms safe operation at 1.1mA quiescent current up to +85°C ambient without derating.
Is OPA743NA/250G4 pin-compatible with other members of the OPA743 family?
No - OPA743NA/250G4 is a single-channel device in SOT23-5, while OPA2743 (dual) and OPA4743 (quad) use different pinouts and footprints (MSOP-8, TSSOP-14, SO-8, SO-14). Pin compatibility exists only within same-channel-count variants sharing identical package types, such as OPA743NA/250G4 and OPA743NA/3K (both SOT23-5).
OPA743NA/250G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 10V/µs
- Gain Bandwidth Product:
- 7 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 1.1mA
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 3.5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
OPA743NA/250G4 FAQ
1.How can I place an order for OPA743NA/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA743NA/250G4 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 OPA743NA/250G4 reliable?
The price and inventory of OPA743NA/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA743NA/250G4 is usually 5 days.
3.What payment methods are accepted for OPA743NA/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA743NA/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA743NA/250G4?
OPA743NA/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA743NA/250G4 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 OPA743NA/250G4?
For technical support, including OPA743NA/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA743NA/250G4 requirements.
6.How does Aetrix verify that OPA743NA/250G4 is sourced from the original manufacturer or authorized distributors?
All OPA743NA/250G4 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 OPA743NA/250G4 meets industry standards.
7.What is the process for return or replacement of OPA743NA/250G4?
All OPA743NA/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA743NA/250G4, 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 OPA743NA/250G4 part is unused and in its original packaging.
Return procedure for OPA743NA/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA743NA/250G4 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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