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Texas Instruments OPA743NA/250
- Part No.:
- OPA743NA/250
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA743NA/250.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:227
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Product details
Overview
OPA743NA/250 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, and 100mV rail-to-rail output swing into 100kΩ - making it ideal for LCD gamma correction reference buffering in portable 10V-panel systems.
For engineers reviewing the OPA743NA/250 datasheet, OPA743NA/250 pinout, OPA743NA/250 application, or OPA743NA/250 equivalent, key selection criteria include its 1pA input bias current, 84dB full-scale CMRR, SOT23-5 thermal resistance (200°C/W), –40°C to +85°C operating range, and verified performance driving 1kΩ loads within 325mV of rails.
Technical Context
The OPA743NA/250 employs a complementary N/P-channel input stage enabling rail-to-rail common-mode input range extending 100mV beyond supply rails at 25°C. Its class-AB output stage supports true rail-to-rail swing under load, with output voltage limited to 100mV from rails at light loads and 325mV at 1kΩ.
It is unity-gain stable and specified across the full 3.5V–12V supply range. Input protection diodes clamp signals exceeding rails by >300mV, requiring ≤10mA current limiting - a constraint addressed in reference buffer designs using series resistors like the 20Ω shown in TI's LCD gamma correction circuit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 7MHz - enables stable closed-loop operation up to ~6.5MHz at G=+1 with adequate phase margin. |
| Slew Rate | 10V/µs - supports clean 5V-step settling in 9µs (0.1%) for data acquisition front-ends. |
| Input Bias Current | 1pA typ - preserves signal integrity in high-impedance sensor interfaces and precision DAC buffers. |
| Output Swing (100kΩ) | 100mV from rail - maintains >98% dynamic range in 12V single-supply systems like LCD reference chains. |
| Quiescent Current | 1.1mA per amplifier - enables battery-powered operation in portable equipment with multi-hour runtime. |
| CMRR | 84dB full-scale - rejects power-supply noise in automotive audio preamps and transducer amplifiers. |
| Supply Range | 3.5V–12V single / ±1.75V–±6V dual - interoperable with legacy 5V logic and modern 10V LCD panel supplies. |
Pinout & Package
SOT23-5 surface-mount package (5-pin, 2.9mm × 1.6mm footprint) with exposed pad for thermal enhancement; JEDEC MO-178AC compliant; MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (V–) | Negative supply | Connect to ground (single-supply) or negative rail; sinking path for output stage current. |
| 2 (–In) | Inverting input | Differential node with 5TΩ common-mode impedance; protected by ESD clamps to rails. |
| 3 (Out) | Amplifier output | Class-AB stage capable of ±20mA drive; swings to 100mV rail under light load. |
| 4 (V+) | Positive supply | Accepts 3.5V–12V; bypass with 1000pF ceramic + 1µF tantalum per TI layout guidelines. |
| 5 (+In) | Non-inverting input | High-impedance node (5TΩ || 4pF); rail-to-rail common-mode range extends (V–)–0.1V to (V+)+0.1V. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Complementary N/P differential pair enables full supply-range common-mode operation without phase inversion. |
| Low-input-bias-current CMOS process | 1pA typical bias current minimizes offset drift in high-Z feedback networks used in active filters. |
| 12V analog CMOS architecture | Enables 10V/µs slew rate and 7MHz GBW while maintaining 1.1mA IQ - unmatched efficiency in 12V op-amp class. |
| Capacitive load drive | Stable with ≥1000pF pure capacitance; enhanced via 20Ω series resistor in feedback loop for LCD gamma buffers. |
| Full industrial temperature spec | Guaranteed performance from –40°C to +85°C - validated for automotive sensor signal conditioning and test equipment. |
Applications
| LCD Gamma Correction Reference Buffer | Automotive Audio Preamp |
|---|---|
Use Scenario: Driving parallel strings of LCD source driver DAC reference inputs in 10V laptop panels requiring 6–8 buffered gamma voltages. IC Role / Device Role / Timing Role: Precision voltage follower providing low-output-impedance, rail-to-rail swing, and glitch immunity during DAC switching. Use Value: 325mV rail compliance at 1kΩ load ensures >96% dynamic range; 1pA IB prevents reference divider loading errors. | Use Scenario: Low-noise, high-CMRR preamplification of microphone or line-level signals in vehicle infotainment head units. IC Role / Device Role / Timing Role: Single-supply signal conditioner with rail-to-rail I/O, rejecting battery ripple and ignition noise. Use Value: 84dB CMRR suppresses 12V supply noise; 30nV/√Hz voltage noise preserves SNR in 20kHz audio bandwidth. |
| Portable Data Acquisition Front-End | Transducer Signal Amplifier |
Use Scenario: Buffering and gain-setting for 12-bit SAR ADC inputs in handheld test meters powered by 2×AA batteries (3V). IC Role / Device Role / Timing Role: Unity-gain stable amplifier with fast settling (9µs @ 0.1%) and low power consumption. Use Value: 1.1mA IQ extends battery life; 7MHz GBW supports anti-alias filtering up to 3.5MHz. | Use Scenario: Amplifying mV-level outputs from strain gauges or thermopiles in industrial sensors. IC Role / Device Role / Timing Role: High-input-impedance, low-drift instrumentation amplifier front-end stage. Use Value: 1pA IB eliminates gauge excitation current error; ±7mV max VOS ensures <0.1% FS error at 10mV input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA340UA | Lower GBW (5.5MHz), higher IQ (1.6mA), same SOT23-5 package and rail-to-rail I/O. | Less suitable for >5MHz active filters or fast-settling DAQ; better for ultra-low-noise <100kHz sensor amps. | Choose OPA340UA if bandwidth demand is ≤5MHz and lower THD+N (0.0005%) is prioritized over speed. |
| MCP6001T-E/OT | Lower GBW (1MHz), much lower IQ (100µA), wider supply (1.8–6V), but only 65dB CMRR and 200mV output swing. | Targeted at ultra-low-power IoT nodes, not 12V LCD or automotive systems requiring high PSRR/CMRR. | Choose MCP6001T-E/OT only for sub-1V battery applications where 7MHz bandwidth and rail compliance are unnecessary. |
Compared with OPA340UA and MCP6001T-E/OT, the OPA743NA/250 uniquely balances 7MHz bandwidth, 12V operation, 1pA bias current, and 100mV rail-to-rail swing - making it irreplaceable in LCD gamma correction and 10V automotive signal chains where all four parameters are simultaneously required.
Availability
OPA743NA/250 is available at Aetrix Electronics and suitable for LCD gamma correction, automotive sensor signal conditioning, and portable data acquisition requiring stable component supply, guaranteed -40°C to +85°C operation, and SOT23-5 footprint compatibility.
Supply support for OPA743NA/250 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 and embedded processing technologies, with decades of expertise in precision op-amps and high-reliability signal chain solutions.
The OPA743 series belongs to TI's precision rail-to-rail CMOS op-amp product line, engineered specifically for 12V single-supply applications demanding high speed, low power, and robust rail-to-rail performance - notably LCD panel reference buffering and automotive signal conditioning.
FAQ
What is the maximum supply voltage rating for the OPA743NA/250?
The OPA743NA/250 has an absolute maximum supply voltage rating of 13.2V (V+ to V–). Its specified operating range is 3.5V to 12V for single-supply use and ±1.75V to ±6V for dual-supply configurations. Operation at 12V is fully characterized and supported across the –40°C to +85°C temperature range, making OPA743NA/250 suitable for 10V LCD panel supplies with headroom.
Does the OPA743NA/250 support rail-to-rail input and output simultaneously?
Yes, the OPA743NA/250 supports true rail-to-rail input and output operation. Its input common-mode range extends from (V–) – 0.1V to (V+) + 0.1V at 25°C, and its output swings to within 100mV of each rail into 100kΩ loads. This simultaneous rail-to-rail capability is critical for maximizing dynamic range in low-voltage, single-supply systems such as portable medical devices and battery-powered test equipment using OPA743NA/250.
What is the thermal resistance (θJA) of the OPA743NA/250 in its SOT23-5 package?
According to the official Texas Instruments datasheet (SBOS201), the junction-to-ambient thermal resistance (θJA) for the OPA743NA/250 in the SOT23-5 package is 200°C/W under standard JEDEC test conditions. This value assumes a 2-layer PCB with minimal copper; actual θJA improves significantly with proper thermal pad layout and additional copper pour, which is essential for sustained 1.1mA operation in enclosed industrial enclosures using OPA743NA/250.
Can the OPA743NA/250 drive capacitive loads, and what is the recommended approach?
Yes, the OPA743NA/250 can drive up to 1000pF of pure capacitive load while remaining stable. For unity-gain configurations with large capacitive loads (e.g., LCD gamma reference bus), TI recommends inserting a 10Ω–20Ω resistor inside the feedback loop - as shown in Figure 4 of SBOS201 - to isolate the op-amp output and reduce ringing without degrading DC accuracy. This technique is validated for OPA743NA/250 in production LCD reference buffer designs.
Is the OPA743NA/250 pin-compatible with other variants in the OPA743 family?
No, the OPA743NA/250 (SOT23-5) is not pin-compatible with dual OPA2743 or quad OPA4743 variants, which use MSOP-8, SO-8, TSSOP-14, or SO-14 packages with different pinouts and channel counts. The OPA743NA/250 has a dedicated 5-pin configuration (V–, –In, Out, V+, +In) optimized for space-constrained single-amplifier applications. Substituting it with OPA2743EA/250 would require PCB redesign due to incompatible pin mapping and package dimensions.
OPA743NA/250 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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/250 FAQ
1.How can I place an order for OPA743NA/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA743NA/250 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/250 reliable?
The price and inventory of OPA743NA/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA743NA/250 is usually 5 days.
3.What payment methods are accepted for OPA743NA/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA743NA/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA743NA/250?
OPA743NA/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA743NA/250 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/250?
For technical support, including OPA743NA/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA743NA/250 requirements.
6.How does Aetrix verify that OPA743NA/250 is sourced from the original manufacturer or authorized distributors?
All OPA743NA/250 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/250 meets industry standards.
7.What is the process for return or replacement of OPA743NA/250?
All OPA743NA/250 units undergo pre-shipment inspection (PSI). If there is an issue with OPA743NA/250, 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/250 part is unused and in its original packaging.
Return procedure for OPA743NA/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA743NA/250 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
Texas Instruments
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902PWR
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LM2902DR
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LM358P
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