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Texas Instruments OPA2743PA
- Part No.:
- OPA2743PA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
OPA2743PA.pdf
- Description:
- IC CMOS 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,983
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Product details
Overview
OPA2743PA from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for 12V operation, delivering 7MHz gain-bandwidth, 10V/µs slew rate, and 1.1mA quiescent current per amplifier. It operates from ±1.75V to ±6V dual supplies or 3.5V–12V single supply, with input common-mode range extending 100mV beyond rails and output swing within 100mV of rails under light load - enabling high dynamic range in LCD gamma correction buffers and portable sensor signal conditioning.
For engineers reviewing the OPA2743PA datasheet, OPA2743PA pinout, OPA2743PA application, or OPA2743PA equivalent, key selection criteria include rail-to-rail I/O performance at 12V, low input bias current (1pA), full-spectrum CMRR (84dB), THD+N of 0.0008%, and compatibility with DIP-8 PCB layouts for prototyping and industrial test equipment.
Technical Context
The OPA2743PA implements a complementary differential input stage (N- and P-channel pairs) to achieve rail-to-rail input operation, with a defined 500mV transition region where both stages conduct - causing measurable variation in CMRR and offset voltage. Its class AB output stage uses common-source transistors to deliver ±20mA output current while maintaining rail-to-rail swing down to 100mV under 100kΩ load.
Designed for unity-gain stability, the device exhibits 9µs 0.1% settling time on a 5V step and drives up to 1000pF capacitive loads; internal compensation ensures stable operation without external phase compensation in standard configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 7MHz - supports medium-speed data acquisition and active filter design up to ~1MHz closed-loop bandwidth. |
| Slew Rate | 10V/µs - enables clean 1Vpp signals at 1MHz without slew-induced distortion. |
| Input Bias Current | 1pA - preserves signal integrity in high-impedance transducer amplifier and precision reference buffer circuits. |
| CMRR | 84dB (full-scale) - maintains accuracy in single-supply systems with varying common-mode noise. |
| Output Swing | Within 100mV of rails (RL = 100kΩ) - maximizes usable dynamic range in 12V LCD gamma reference applications. |
| Quiescent Current | 1.1mA per amplifier - enables battery-powered portable instrumentation with multi-day runtime. |
| THD+N | 0.0008% at 6kHz - meets audio-grade signal fidelity requirements in automotive sensor front-ends. |
Pinout & Package
OPA2743PA is housed in an 8-pin Dual In-line Package (DIP-8) with through-hole mounting, compatible with legacy prototyping and industrial control PCBs. Thermal resistance θJA is 100°C/W, supporting operation from –40°C to +85°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplifier A output node; capable of sourcing/sinking ±20mA with rail-to-rail swing. |
| 2 | Inverting Input A | High-impedance (5TΩ || 4pF) negative feedback node for amplifier A. |
| 3 | Non-inverting Input A | High-impedance (5TΩ || 4pF) positive input node; extends 100mV beyond supply rails. |
| 4 | V– | Negative power supply terminal; accepts –1.75V to –6V in dual-supply mode or ground in single-supply mode. |
| 5 | Non-inverting Input B | High-impedance positive input node for amplifier B; identical rail-to-rail specification as Pin 3. |
| 6 | Inverting Input B | High-impedance negative feedback node for amplifier B; matched to Pin 2 for dual-channel tracking. |
| 7 | Output B | Amplifier B output node; electrically isolated from Output A with >110dB channel separation at DC. |
| 8 | V+ | Positive power supply terminal; accepts +3.5V to +12V (single) or +1.75V to +6V (dual). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full supply utilization in 12V single-supply systems, preserving >98% of theoretical dynamic range at 100kΩ load. |
| Ultra-low input bias current | 1pA typical allows direct interfacing with high-Z sources (e.g., piezoelectric sensors, pH electrodes) without signal degradation. |
| 12V operation capability | Supports direct integration into LCD panel gamma reference chains powered from 10V–12V rails without level-shifting. |
| Unity-gain stable architecture | Eliminates need for external compensation components in buffer and gain-of-one configurations. |
| Low THD+N | 0.0008% at 6kHz ensures minimal harmonic contamination in audio and precision measurement signal paths. |
Applications
| LCD Gamma Correction Reference Buffer | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Driving parallel strings of LCD source driver DAC reference inputs in 10V-powered TFT panels requiring precise grayscale voltage generation. IC Role / Device Role / Timing Role: Dual-channel rail-to-rail output buffer providing stable, low-noise reference voltages to multiple 6-bit DACs while rejecting supply ripple. Use Value: Output swing within 100mV of 12V rail ensures full 0–10V DAC range utilization; 1pA input bias prevents reference divider loading errors. | Use Scenario: Amplifying low-level analog outputs from temperature, pressure, or position sensors in automotive body control modules operating from 12V battery supply. IC Role / Device Role / Timing Role: Dual-channel signal conditioner performing gain, filtering, and level-shifting before ADC sampling. Use Value: 7MHz GBW supports fast transient response to engine vibration; 84dB CMRR rejects ignition noise coupled onto sensor lines. |
| Portable Data Acquisition Front-End | Battery-Powered Test Equipment |
Use Scenario: Signal amplification and anti-aliasing filtering in handheld multimeters or oscilloscope probes powered by two AA cells (3V). IC Role / Device Role / Timing Role: Dual op-amp configured as programmable-gain amplifier and active filter stage. Use Value: 1.1mA quiescent current per channel extends battery life; rail-to-rail I/O maintains accuracy across entire 0–3V input/output range. | Use Scenario: Precision voltage reference buffering and sensor excitation in benchtop calibrators and signal generators with 12V internal supplies. IC Role / Device Role / Timing Role: Dual-channel buffer isolating sensitive reference sources from variable load conditions. Use Value: 0.0008% THD+N ensures spectral purity in calibration signals; 10V/µs slew rate supports fast step-response verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333PA | Zero-drift architecture; 0.02µV/°C offset drift vs. OPA2743PA's ±8µV/°C; lower 1/f noise but 350kHz GBW. | Better for DC-critical sensor bridges; unsuitable for >500kHz active filters or gamma correction timing. | Select OPA2333PA only when microvolt-level offset stability over temperature is mandatory and bandwidth < 400kHz suffices. |
| LMV358DR | Lower cost; 1MHz GBW, 1V/µs slew rate, 45µA IQ; rail-to-rail output only (not input); 2.7–5.5V supply range. | Valid for low-speed, low-voltage consumer electronics; cannot replace OPA2743PA in 12V or high-fidelity signal paths. | Choose LMV358DR for cost-sensitive, sub-5V applications where 7MHz bandwidth and 1pA bias current are unnecessary. |
Compared with OPA2333PA and LMV358DR, the OPA2743PA uniquely balances 7MHz bandwidth, 1pA input bias, rail-to-rail I/O, and 12V operation - making it irreplaceable in LCD gamma buffers and 12V portable instrumentation where all four attributes are simultaneously required.
Availability
OPA2743PA is available at Aetrix Electronics and suitable for LCD display manufacturing, automotive sensor module production, and portable test equipment development requiring stable component supply with long-term DIP-8 package continuity.
Supply support for OPA2743PA 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 industrial components.
The OPA2743PA belongs to TI's precision CMOS op-amp product line, engineered specifically for high-voltage rail-to-rail signal conditioning in display, automotive, and portable instrumentation applications.
FAQ
What is the maximum supply voltage rating for the OPA2743PA?
The OPA2743PA has an absolute maximum supply voltage rating of 13.2V across V+ and V– terminals. Its specified operating range is ±1.75V to ±6V dual supply or 3.5V to 12V single supply. Exceeding 13.2V risks permanent damage per TI's SBOS201 datasheet Absolute Maximum Ratings table.
Does the OPA2743PA support true rail-to-rail input operation?
Yes, the OPA2743PA supports true rail-to-rail input: its common-mode voltage range extends 100mV beyond both supply rails at room temperature, enabled by complementary N- and P-channel input stages. This is confirmed in the "RAIL-TO-RAIL INPUT" section of the SBOS201 datasheet, including Figure 1 and detailed transition region analysis.
Can the OPA2743PA drive a 1kΩ load while maintaining rail-to-rail output swing?
The OPA2743PA delivers rail-to-rail output swing within 325mV of the rails when driving a 1kΩ load, as verified in the Electrical Characteristics table (Output Voltage Swing from Rail, RL = 1kΩ). At 100kΩ, swing improves to within 100mV - a key specification validated across –40°C to +85°C.
What is the input bias current specification for the OPA2743PA at 25°C?
The OPA2743PA has a typical input bias current of ±1pA at 25°C and ±6V supply, with a maximum of ±10pA over temperature (–40°C to +85°C), as documented in the Electrical Characteristics table under "Input Bias Current (IB)". This ultra-low value is critical for high-impedance sensor interfaces.
Is the OPA2743PA unity-gain stable?
Yes, the OPA2743PA is explicitly designed for unity-gain stability, as stated in the Applications Information section of SBOS201: "The OPA743 is unity-gain stable and offers 7MHz bandwidth and 10V/µs slew rate." This applies identically to the dual-channel OPA2743PA variant per family-wide characterization.
OPA2743PA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- 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 (x2 Channels)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
OPA2743PA FAQ
1.How can I place an order for OPA2743PA through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2743PA 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 OPA2743PA reliable?
The price and inventory of OPA2743PA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2743PA is usually 5 days.
3.What payment methods are accepted for OPA2743PA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2743PA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2743PA?
OPA2743PA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2743PA 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 OPA2743PA?
For technical support, including OPA2743PA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2743PA requirements.
6.How does Aetrix verify that OPA2743PA is sourced from the original manufacturer or authorized distributors?
All OPA2743PA 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 OPA2743PA meets industry standards.
7.What is the process for return or replacement of OPA2743PA?
All OPA2743PA units undergo pre-shipment inspection (PSI). If there is an issue with OPA2743PA, 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 OPA2743PA part is unused and in its original packaging.
Return procedure for OPA2743PA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2743PA Tags
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