My Inquiry
My Account
Texas Instruments OPA2743UA
- Part No.:
- OPA2743UA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2743UA.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:339
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA2743UA from Texas Instruments is a dual-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 per amplifier, and 84dB CMRR - enabling high-fidelity signal conditioning in LCD gamma correction buffers and portable instrumentation.
For engineers reviewing the OPA2743UA datasheet, OPA2743UA pinout, OPA2743UA application, or OPA2743UA equivalent, key selection criteria include rail-to-rail I/O swing (≤100mV from rails at light load), ultra-low 1pA input bias current, 7MHz bandwidth with unity-gain stability, and SOIC-8 packaging suitable for space-constrained industrial and automotive sensor interfaces.
Technical Context
The OPA2743UA employs a complementary CMOS input stage enabling rail-to-rail common-mode input range extending 100mV beyond supply rails, with a defined transition region between N- and P-channel pairs. Its class AB output stage supports rail-to-rail output swing to within 100mV of V+ and V− under 100kΩ load.
Designed for low-noise, low-distortion operation, it achieves 30nV/√Hz input voltage noise density at 10kHz and 0.0008% THD+N at 6kHz, while maintaining full-swing performance across –40°C to +85°C. The device is fully specified over its entire supply range and temperature grade without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 7MHz - enables stable unity-gain operation with sufficient phase margin for driving ADC inputs or active filters up to ~1MHz closed-loop bandwidth. |
| Slew Rate | 10V/µs - supports clean 1Vpp signals up to ~1.6MHz without slew-induced distortion in buffer or gain stages. |
| Input Bias Current | 1pA typical - minimizes offset error in high-impedance sensor interfaces (e.g., photodiode transimpedance amps) and precision reference buffers. |
| CMRR | 84dB typical at 25°C - ensures accurate differential signal amplification in noisy environments such as automotive sensor front-ends. |
| Output Swing | Within 100mV of rails (RL = 100kΩ) - preserves full dynamic range in 3.3V or 5V systems where headroom is constrained. |
| Quiescent Current | 1.1mA per amplifier - allows dual-channel operation in battery-powered equipment with <2.2mA total supply current. |
| Supply Range | 3.5V–12V single or ±1.75V–±6V dual - supports direct integration into 5V, 9V, or 12V industrial power domains without LDO pre-regulation. |
Pinout & Package
OPA2743UA is housed in an 8-pin SOIC (D) package with standard JEDEC outline, 1.27mm pitch, and 5.0mm × 6.2mm footprint. Pin 1 is located at the top-left corner adjacent to the index notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input A | High-impedance node for feedback network connection; accepts rail-to-rail common-mode voltages. |
| 2 | Non-inverting Input A | High-impedance signal input for channel A; complementary input pair enables extended common-mode range. |
| 3 | Output A | Class AB output capable of sourcing/sinking ±20mA; swings to within 100mV of V+ and V− with light loads. |
| 4 | V− | Negative supply rail connection; must be bypassed with 1µF tantalum + 1000pF ceramic for stability. |
| 5 | V+ | Positive supply rail connection; same bypassing requirement as V−; supports up to 12V absolute max. |
| 6 | Non-inverting Input B | Independent high-impedance input for channel B; electrically isolated from channel A except via shared supplies. |
| 7 | Inverting Input B | Feedback node for channel B; identical electrical characteristics to pin 1. |
| 8 | Output B | Second independent rail-to-rail output; drives loads in parallel with Output A without crosstalk degradation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal handling in low-voltage systems (e.g., 3.3V logic-compatible analog front-ends) without level-shifting circuitry. |
| 1pA input bias current | Reduces voltage error in high-Z networks (e.g., >10MΩ sensor bridges), eliminating need for guard traces or active bias cancellation. |
| 7MHz GBW with unity-gain stability | Permits direct use in high-speed buffering, active filtering, and DAC output conditioning without external compensation components. |
| 1.1mA quiescent current per amplifier | Supports dual-channel operation in energy-sensitive applications like handheld test equipment or battery-backed data loggers. |
| Specified from –40°C to +85°C | Validates performance across automotive cabin and industrial control environments without thermal derating or calibration drift concerns. |
Applications
| LCD Gamma Correction Buffer | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Driving reference voltage inputs of TFT LCD source drivers requiring precise, stable DC levels across 8 parallel gamma strings. IC Role / Device Role / Timing Role: Dual-channel rail-to-rail output buffer providing low-drift, low-noise references while sinking/source up to ±20mA per channel. Use Value: Maintains 100mV rail-to-rail swing at 1kΩ load, enabling full 10V panel dynamic range without headroom loss or external boost circuitry. | Use Scenario: Amplifying low-level signals from piezoresistive pressure sensors or thermopile IR detectors in engine control or climate modules. IC Role / Device Role / Timing Role: Precision dual op-amp performing DC-coupled gain and offset adjustment prior to ADC sampling. Use Value: 1pA input bias current prevents loading of high-output-impedance sensors; 84dB CMRR rejects engine compartment EMI during cold-cranking events. |
| Portable Instrumentation Front-End | Active Filter for Data Acquisition |
Use Scenario: Signal conditioning stage in handheld multimeters or portable oscilloscope probes operating from single 9V battery. IC Role / Device Role / Timing Role: Dual-channel amplifier providing programmable gain and DC offset correction before 12-bit SAR ADC conversion. Use Value: 1.1mA per amplifier enables >20 hours of continuous operation on alkaline 9V; rail-to-rail I/O maximizes usable ADC input range. | Use Scenario: 2nd-order Sallen-Key low-pass filter in medical ECG or environmental sensor nodes rejecting 50/60Hz interference. IC Role / Device Role / Timing Role: Dual op-amp implementing unity-gain buffer + filter topology with minimal external components. Use Value: 7MHz GBW ensures filter cutoff accuracy to ±0.1% at 100kHz; 0.0008% THD+N preserves signal integrity for sub-microvolt biopotential measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Zero-drift architecture; 12µV max offset vs. OPA2743UA's ±7mV; 350kHz GBW vs. 7MHz. | Better DC precision but insufficient bandwidth for LCD gamma or fast active filters. | Select when microvolt-level offset stability dominates over speed - e.g., precision weigh scales or strain gauge bridges. |
| TLV2462IDR | Lower supply range (2.7–6V); 6.4MHz GBW; 1.2mA IQ; no guaranteed rail-to-rail output swing below 100mV. | Compatible with 3.3V systems but unsuitable for 9V/12V LCD panels or high-headroom industrial sensors. | Choose for cost-sensitive 3.3V embedded designs where 120mV output swing and 6.4MHz bandwidth meet requirements. |
Compared with OPA2333AIDR and TLV2462IDR, the OPA2743UA uniquely balances 7MHz bandwidth, true rail-to-rail I/O, 12V operation, and 1pA input bias - making it optimal for LCD gamma buffers and dual-channel sensor front-ends demanding both speed and precision.
Availability
OPA2743UA is available at Aetrix Electronics and suitable for LCD display manufacturing, automotive sensor modules, portable instrumentation, and industrial data acquisition systems requiring stable component supply across long production lifecycles.
Supply support for OPA2743UA 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 signal chain solutions.
The OPA2743UA belongs to TI's high-speed, rail-to-rail CMOS op-amp family designed specifically for 12V-capable, low-power, high-fidelity analog signal conditioning in displays, automotive, and portable equipment.
FAQ
What is the maximum supply voltage rating for the OPA2743UA?
The OPA2743UA has an absolute maximum supply voltage rating of 13.2V across V+ and V− pins. Its recommended operating range is 3.5V–12V single supply or ±1.75V–±6V dual supply. Exceeding 13.2V risks permanent damage per TI's Absolute Maximum Ratings table in SBOS201.
Does the OPA2743UA support rail-to-rail input common-mode voltage beyond the supply rails?
Yes - the OPA2743UA's input common-mode range extends 100mV beyond both V+ and V− at room temperature, enabled by its complementary N/P-channel input stage. This allows valid operation with inputs up to (V+) + 0.1V or (V−) − 0.1V, critical for sensor interfaces with overvoltage transients.
Can the OPA2743UA drive capacitive loads without oscillation?
The OPA2743UA can directly drive up to 1000pF pure capacitive load while maintaining stability. For unity-gain configurations with larger loads, TI recommends inserting a 10Ω–20Ω series resistor inside the feedback loop (as shown in Figure 4 of SBOS201) to isolate the op-amp output and suppress ringing without degrading DC accuracy.
What is the typical output voltage swing for OPA2743UA under 1kΩ load?
Under 1kΩ load conditions, the OPA2743UA delivers a typical output swing of 325mV from each rail (i.e., V+ − 0.325V to V− + 0.325V) while maintaining ≥86dB open-loop gain. This is verified in the Electrical Characteristics table under "Voltage Output Swing from Rail" with RL = 1kΩ.
Is the OPA2743UA pin-compatible with other dual op-amps in SOIC-8 package?
No - the OPA2743UA uses a non-standard SOIC-8 pinout optimized for dual-channel symmetry: pins 1/2/3 = ChA−/ChA+/ChAout, pins 6/7/8 = ChB+/ChB−/ChBout, with V− on pin 4 and V+ on pin 5. It is not pin-compatible with generic dual op-amps like LM358 or TL082, which place V+ on pin 8 and V− on pin 4.
OPA2743UA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2743UA FAQ
1.How can I place an order for OPA2743UA through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2743UA 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 OPA2743UA reliable?
The price and inventory of OPA2743UA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2743UA is usually 5 days.
3.What payment methods are accepted for OPA2743UA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2743UA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2743UA?
OPA2743UA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2743UA 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 OPA2743UA?
For technical support, including OPA2743UA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2743UA requirements.
6.How does Aetrix verify that OPA2743UA is sourced from the original manufacturer or authorized distributors?
All OPA2743UA 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 OPA2743UA meets industry standards.
7.What is the process for return or replacement of OPA2743UA?
All OPA2743UA units undergo pre-shipment inspection (PSI). If there is an issue with OPA2743UA, 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 OPA2743UA part is unused and in its original packaging.
Return procedure for OPA2743UA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2743UA 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…
