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Texas Instruments OPA2743UA/2K5
- Part No.:
- OPA2743UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2743UA/2K5.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,044
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Product details
Overview
OPA2743UA/2K5 from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for 3.5V to 12V single-supply or ±1.75V to ±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 automotive sensor interfaces.
For engineers reviewing the OPA2743UA/2K5 datasheet, OPA2743UA/2K5 pinout, OPA2743UA/2K5 application, or OPA2743UA/2K5 equivalent, key selection considerations include its MSOP-8 or SOIC-8 package options, rail-to-rail I/O swing within 100mV of rails (RL = 100kΩ), low 1pA input bias current, and guaranteed –40°C to +85°C operation.
Technical Context
The OPA2743UA/2K5 implements a complementary CMOS input stage enabling rail-to-rail common-mode input range extending 100mV beyond supply rails, with a 500mV transition region where both N- and P-channel pairs are active. Its class AB output stage supports rail-to-rail output swing to within 100mV (100kΩ load) or 325mV (1kΩ load) of supply rails while maintaining >86dB open-loop gain.
It is unity-gain stable and features no phase inversion when inputs exceed supply rails - provided input current is limited to ≤10mA via series resistance. The device drives capacitive loads up to 1000pF and supports 20mA output current per channel with ±30mA short-circuit capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 7MHz - enables stable closed-loop operation up to ~5MHz at G = +2 with adequate phase margin. |
| Slew Rate | 10V/µs - supports clean 1Vpp signals up to ~1.6MHz without slew-induced distortion. |
| Input Bias Current | ±1pA typical - minimizes voltage error in high-impedance sensor interfaces (e.g., photodiode amps). |
| Output Swing (100kΩ) | Within 100mV of rails - preserves full dynamic range in low-voltage 3.5V–12V systems. |
| Quiescent Current | 1.1mA per amplifier - allows battery-powered portable equipment operation for extended duration. |
| CMRR | 84dB (typical, ±5V) - rejects common-mode noise in automotive or industrial transducer amplifiers. |
| Supply Range | 3.5V to 12V single or ±1.75V to ±6V dual - compatible with legacy 5V, modern 3.3V, and high-brightness LCD 10V rails. |
Pinout & Package
OPA2743UA/2K5 is packaged in an 8-pin SOIC (D) surface-mount package with standard pinout and JEDEC-compliant footprint. Thermal resistance θJA is 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input B | Accepts differential input signal for Channel B; biased at common-mode voltage up to 100mV beyond rails. |
| 2 | Non-Inverting Input B | Reference input for Channel B; supports rail-to-rail common-mode range with <1pA bias current. |
| 3 | Output B | Delivers rail-to-rail output swing (100mV rail margin, 100kΩ); capable of ±20mA drive. |
| 4 | V– | Negative supply terminal; accepts –1.75V to –6V (dual) or ground (single); bypass with 1µF + 1000pF. |
| 5 | V+ | Positive supply terminal; accepts +3.5V to +12V (single) or +1.75V to +6V (dual); same bypassing required. |
| 6 | Non-Inverting Input A | Reference input for Channel A; identical electrical behavior to Pin 2. |
| 7 | Inverting Input A | Signal input for Channel A; matched offset and bias performance to Pin 1. |
| 8 | Output A | Delivers rail-to-rail output swing (100mV rail margin, 100kΩ); independent of Channel B. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal handling in 3.5V systems without level-shifting circuitry. |
| 12V analog CMOS process | Delivers 7MHz GBW and 10V/µs slew rate while maintaining low 1.1mA quiescent current. |
| Low input bias current (1pA) | Preserves accuracy in high-Z sensor front-ends (e.g., pH electrodes, piezoresistive bridges). |
| No phase inversion on overvoltage | Allows safe operation with inputs exceeding V+ or dropping below V– when current-limited to ≤10mA. |
| Capacitive load drive (1000pF) | Stabilizes reference buffers driving DAC input capacitance or LCD column line capacitance. |
Applications
| LCD Gamma Correction Buffer | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Driving reference voltages for 6-bit grayscale DACs in TFT-LCD source drivers requiring precise 0–10V gamma curves. IC Role / Device Role / Timing Role: Dual-channel rail-to-rail buffer isolating resistive ladder references from heavy parallel DAC loading (6–8 channels, ~1.7kΩ total). Use Value: 12V operation and 325mV rail swing into 1kΩ ensure full 10V dynamic range; 1.1mA IQ extends battery life in portable displays. | Use Scenario: Amplifying low-level signals from temperature, pressure, or position sensors in engine control units or ADAS modules. IC Role / Device Role / Timing Role: Dual op-amp performing DC-coupled gain and filtering before ADC sampling; operates from 5V or 12V vehicle rails. Use Value: 84dB CMRR rejects ignition noise; rail-to-rail I/O accommodates wide sensor output ranges; –40°C to +85°C rating meets automotive qualification. |
| Portable Equipment Analog Front-End | Active Filter for Data Acquisition |
Use Scenario: Low-power signal conditioning in handheld test meters, medical monitors, or IoT edge nodes powered by coin cells or Li-ion batteries. IC Role / Device Role / Timing Role: Dual amplifier providing programmable gain and anti-aliasing filtering prior to SAR ADC conversion. Use Value: 1.1mA per channel enables multi-day operation on 200mAh battery; 7MHz GBW supports >1MHz filter cutoffs with minimal phase shift. | Use Scenario: Implementing 2nd-order Sallen-Key or MFB filters in precision data loggers or sensor fusion systems. IC Role / Device Role / Timing Role: Dual op-amp configured as unity-gain buffer + active filter stage; driven by low-noise reference or transducer output. Use Value: 30nV/√Hz input voltage noise and 0.0008% THD+N preserve SNR; rail-to-rail output avoids clipping in ±2.5V reference designs. |
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; 0.02µV/°C offset drift vs. OPA2743UA/2K5's ±8µV/°C; 350kHz GBW vs. 7MHz. | Better DC precision for thermocouple or strain gauge amplification; insufficient bandwidth for LCD gamma buffering. | Select OPA2333AIDR only when µV-level offset stability dominates over speed and rail-to-rail output swing. |
| TLV2462IDR | Lower supply range (2.7V–6V); 6.4MHz GBW; 1.2mA IQ; 100mV rail swing (100kΩ); not specified for 12V operation. | Cost-optimized for 3.3V embedded systems; unsuitable for 10V LCD panels or 12V automotive supplies. | Choose TLV2462IDR for space-constrained 3.3V designs where 12V tolerance is unnecessary and lower cost is critical. |
Compared with OPA2333AIDR and TLV2462IDR, the OPA2743UA/2K5 uniquely balances 12V operation, 7MHz bandwidth, rail-to-rail I/O, and 1.1mA quiescent current - making it the only option among the three qualified for LCD gamma correction and wide-supply automotive sensor interfaces.
Availability
OPA2743UA/2K5 is available at Aetrix Electronics and suitable for LCD display manufacturing, automotive electronics production, and portable instrumentation requiring stable component supply across long product lifecycles.
Supply support for OPA2743UA/2K5 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 and embedded processing solutions for industrial, automotive, and personal electronics markets.
The OPA2743UA/2K5 belongs to TI's precision high-speed CMOS op-amp product line, designed specifically for rail-to-rail signal conditioning in power-constrained, wide-supply applications such as LCD reference buffering and automotive sensor interfaces.
FAQ
What is the maximum supply voltage for OPA2743UA/2K5?
The absolute maximum supply voltage for OPA2743UA/2K5 is 13.2V (V+ to V–). Its specified operating range is 3.5V to 12V single supply or ±1.75V to ±6V dual supply. Operation at 12V is fully characterized and supported across –40°C to +85°C, making OPA2743UA/2K5 suitable for high-voltage LCD panel references and 12V automotive systems.
Does OPA2743UA/2K5 support rail-to-rail input and output simultaneously?
Yes, OPA2743UA/2K5 supports true rail-to-rail input and output operation. Its input common-mode range extends 100mV beyond both supply rails, and its output swings to within 100mV of each rail under light load (100kΩ). This simultaneous rail-to-rail capability is maintained across its full –40°C to +85°C temperature range and enables full dynamic range utilization in low-voltage systems using OPA2743UA/2K5.
What package type is used for OPA2743UA/2K5?
OPA2743UA/2K5 uses the SOIC-8 (D) surface-mount package, 3.9mm × 4.9mm body size, with standard JEDEC outline and 1.27mm lead pitch. This package is RoHS-compliant, rated for moisture sensitivity level (MSL) 2–260°C–1 year, and supplied in 2500-piece tape-and-reel format (part number suffix /2K5G4.B confirms this configuration).
Can OPA2743UA/2K5 drive heavy capacitive loads?
Yes, OPA2743UA/2K5 can drive up to 1000pF of pure capacitive load while remaining stable. For unity-gain configurations with large capacitive loads (e.g., LCD column lines), inserting a 10Ω–20Ω series resistor inside the feedback loop - as documented in TI's SBOS201 datasheet Figure 4 - improves settling time and reduces ringing without compromising DC accuracy. This capability is intrinsic to OPA2743UA/2K5's internal compensation design.
Is OPA2743UA/2K5 suitable for automotive applications?
Yes, OPA2743UA/2K5 is explicitly listed for automotive applications including audio, sensor interfaces, and security systems in its official datasheet. It is specified and tested over –40°C to +85°C, features robust ESD protection, and maintains rail-to-rail I/O performance across its full temperature and supply range - satisfying core requirements for under-hood and cabin electronics. Its 12V operation directly supports 12V vehicle electrical systems.
OPA2743UA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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/2K5 FAQ
1.How can I place an order for OPA2743UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2743UA/2K5 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/2K5 reliable?
The price and inventory of OPA2743UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2743UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA2743UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2743UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2743UA/2K5?
OPA2743UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2743UA/2K5 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/2K5?
For technical support, including OPA2743UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2743UA/2K5 requirements.
6.How does Aetrix verify that OPA2743UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA2743UA/2K5 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/2K5 meets industry standards.
7.What is the process for return or replacement of OPA2743UA/2K5?
All OPA2743UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2743UA/2K5, 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/2K5 part is unused and in its original packaging.
Return procedure for OPA2743UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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