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Texas Instruments OPA4743UA/2K5
- Part No.:
- OPA4743UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4743UA/2K5.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,386
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Product details
Overview
OPA4743UA/2K5 from Texas Instruments is a quad rail-to-rail input/output CMOS operational amplifier optimized for 12V single-supply operation, delivering 7MHz gain-bandwidth, 10V/µs slew rate, and 1.1mA quiescent current per amplifier - enabling high-fidelity signal conditioning in LCD gamma correction buffers and portable instrumentation.
For engineers reviewing the OPA4743UA/2K5 datasheet, OPA4743UA/2K5 pinout, OPA4743UA/2K5 application, or OPA4743UA/2K5 equivalent, key selection criteria include rail-to-rail I/O swing (≤100mV from rails at 100kΩ), low 1pA input bias current, ±1.75V to ±6V dual-supply compatibility, and TSSOP-14/SO-14 package options for space-constrained analog front-ends.
Technical Context
The OPA4743UA/2K5 employs a complementary CMOS input stage enabling rail-to-rail input common-mode range extending 100mV beyond supply rails, with a defined transition region between (V+)–2.1V and (V+)–1.4V where both N- and P-channel pairs operate. Its class AB output stage delivers ±20mA output current while maintaining 100mV rail-to-rail swing into 100kΩ loads.
Designed for unity-gain stability, the device achieves 0.0008% THD+N at 6kHz and supports capacitive load drive up to 1000pF - enhanced by internal compensation and validated for use with series feedback resistors (e.g., 20Ω) in reference buffer configurations for DACs and LCD source drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 7MHz - enables stable closed-loop operation up to 100kHz with G ≥ 10, suitable for anti-aliasing and active filter stages. |
| Slew Rate | 10V/µs - supports 5V step settling in 9µs (0.1%), critical for fast data acquisition sampling interfaces. |
| Input Bias Current | 1pA typical - minimizes voltage error in high-impedance sensor interfaces (e.g., photodiode transimpedance amps). |
| Output Swing (100kΩ) | Within 100mV of rails - preserves full dynamic range in 3.5V–12V single-supply systems like portable medical monitors. |
| Quiescent Current | 1.1mA per amplifier - allows four independent channels in battery-powered equipment with <4.4mA total IQ. |
| CMRR | 84dB typical at 25°C - rejects common-mode noise in noisy automotive sensor signal chains (e.g., wheel speed sensors). |
| Supply Range | 3.5V to 12V single or ±1.75V to ±6V dual - interoperable with legacy 5V logic and modern 12V industrial rails without level-shifting. |
Pinout & Package
OPA4743UA/2K5 is packaged in SO-14 surface-mount format (Package Drawing D), with thermal resistance θJA = 100°C/W. Pin numbering follows standard SOIC convention with Pin 1 in Quadrant Q1 per tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives external load directly; capable of ±20mA sourcing/sinking into 1kΩ. |
| 2 | –In A | Inverting input for Amp A - high-impedance node (5TΩ || 4pF); requires matched trace routing to minimize imbalance. |
| 3 | +In A | Non-inverting input for Amp A - same impedance as Pin 2; used for unity-gain buffer or precision summing. |
| 4 | V– | Negative supply rail - must be decoupled with 1µF tantalum + 1000pF ceramic near package. |
| 5 | +In B | Non-inverting input for Amp B - electrically isolated from other amplifiers; enables independent channel configuration. |
| 6 | –In B | Inverting input for Amp B - shares no internal coupling with Amp A inputs; supports differential pair implementation. |
| 7 | Out B | Amplifier B output - identical AC/DC specs to Pin 1; usable for dual-channel signal paths (e.g., stereo audio preamp). |
| 8 | V+ | Positive supply rail - accepts 3.5V–12V single or ±1.75V–±6V dual; bypassing mandatory for PSRR >100dB. |
| 9 | Out C | Amplifier C output - fully independent channel; validated for simultaneous operation with all other amplifiers at full spec. |
| 10 | –In C | Inverting input for Amp C - supports high-precision instrumentation topologies with matched resistor networks. |
| 11 | +In C | Non-inverting input for Amp C - referenced to same V+ and V– as other channels; no cross-talk observed at 1MHz. |
| 12 | +In D | Non-inverting input for Amp D - enables four-channel parallel processing (e.g., multi-sensor data acquisition). |
| 13 | –In D | Inverting input for Amp D - maintains 1pA bias current across full temperature range (–40°C to +85°C). |
| 14 | Out D | Amplifier D output - specified for 325mV rail-to-rail swing into 1kΩ, enabling direct interface to ADC reference inputs. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 100mV beyond V+ and V– rails - eliminates need for level-shifting in 3.3V/5V microcontroller interfacing. |
| Low input bias current (1pA) | Enables accurate measurement of nanoamp-level sensor currents without significant offset drift. |
| 12V operation capability | Supports direct integration into LCD panel gamma reference buffers requiring 10V supply rails. |
| Quad-channel isolation | No measurable crosstalk (<–100dB) between channels at 100kHz - suitable for multi-channel data acquisition. |
| Unity-gain stability | Operates without external compensation in G = +1 configurations - simplifies design of reference buffers and active filters. |
Applications
| LCD Gamma Correction Reference Buffer | Automotive Sensor Signal Conditioning |
|---|---|
Use Scenario: Driving 6–8 parallel LCD source driver ICs requiring precise, low-drift gamma voltage references (GMA1–GMA10) from a 10V rail. IC Role / Device Role / Timing Role: Quad op-amp configured as four independent rail-to-rail buffers, each sourcing/sinking transient glitch currents during DAC switching. Use Value: 325mV rail-to-rail swing into 1kΩ loads ensures full 10V dynamic range; 1.1mA per amplifier enables four-channel operation within 4.4mA total budget. | Use Scenario: Amplifying low-level signals from piezoresistive pressure sensors or Hall-effect position sensors in engine control units. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end (using two OPA4743UA/2K5 amplifiers per channel) with matched gain and offset. Use Value: 84dB CMRR rejects ignition noise; 1pA input bias prevents signal corruption from high-resistance sensor elements (>1MΩ). |
| Portable Data Acquisition System | Industrial Active Filter Bank |
Use Scenario: Four-channel simultaneous sampling of thermocouple, RTD, strain gauge, and pH sensor outputs in handheld test equipment. IC Role / Device Role / Timing Role: Quad amplifier providing programmable gain (1–100×), filtering, and level-shifting prior to SAR ADC input. Use Value: 7MHz GBW supports >100kHz anti-aliasing filter cutoff; 10V/µs slew rate ensures <15µs settling for 0.01% accuracy at full scale. | Use Scenario: Implementing fourth-order low-pass and band-pass filters for vibration monitoring in motor drives and HVAC systems. IC Role / Device Role / Timing Role: Quad op-amp configured as two biquad sections (each using two amplifiers) for high-Q, low-distortion filtering. Use Value: 0.0008% THD+N preserves signal integrity in spectral analysis; rail-to-rail output maximizes SNR in 24-bit delta-sigma ADC interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4743EA/250 | TSSOP-14 package (θJA = 100°C/W), same electrical specs, MSL Level-2 vs SO-14's Level-1 | Better thermal performance in dense layouts; smaller footprint but requires finer-pitch reflow profile | Select for space-constrained PCBs where thermal dissipation >100mW per amplifier is expected |
| TLV4743IPWR | Lower 0.95mA IQ, reduced 5.5MHz GBW, same 1pA IB, SO-14 pinout compatible | Optimized for ultra-low-power battery operation; insufficient bandwidth for >50kHz active filters | Select when power budget is <4mA total and bandwidth requirements ≤50kHz |
Compared with OPA4743EA/250, the OPA4743UA/2K5 offers simpler assembly (Level-1 MSL) and higher volume packaging (2500/reel), while TLV4743IPWR trades 1.5MHz bandwidth and 0.15mA per amplifier for extended battery life - making OPA4743UA/2K5 optimal for performance-critical industrial and display applications.
Availability
OPA4743UA/2K5 is available at Aetrix Electronics and suitable for LCD gamma correction, automotive sensor signal conditioning, and portable data acquisition requiring stable component supply, long-term production continuity, and RoHS-compliant SO-14 packaging.
Supply support for OPA4743UA/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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90 years of innovation in precision amplifiers and data converters.
The OPA743 family - including OPA4743UA/2K5 - was designed specifically for high-voltage, low-power, rail-to-rail signal conditioning in display reference buffers, portable instrumentation, and automotive sensor interfaces.
FAQ
What is the maximum supply voltage rating for OPA4743UA/2K5?
The absolute maximum supply voltage for OPA4743UA/2K5 is 13.2V across V+ to V– terminals. Continuous operation is specified from 3.5V to 12V single supply or ±1.75V to ±6V dual supplies. Exceeding 12V in normal operation risks parametric shift and reduced reliability, though the device withstands brief transients up to 13.2V per TI's SBOS201 datasheet Absolute Maximum Ratings table.
Does OPA4743UA/2K5 support rail-to-rail input beyond the supply rails?
Yes, OPA4743UA/2K5 features rail-to-rail input with common-mode voltage range extending 100mV beyond both V+ and V– rails at room temperature. This is achieved via complementary N- and P-channel input stages. Input voltages exceeding rails by >300mV require current limiting to ≤10mA using series resistors to prevent ESD diode conduction, as documented in Figure 2 of the SBOS201 datasheet.
What is the output drive capability of OPA4743UA/2K5 into resistive loads?
OPA4743UA/2K5 delivers ±20mA output current per amplifier, enabling direct drive of 1kΩ loads with 325mV rail-to-rail swing while maintaining >96dB open-loop gain. At lighter loads (100kΩ), swing improves to ≤100mV from rails. Short-circuit current is ±30mA, and the device safely handles continuous output short-circuits to either rail per TI's production data.
Can OPA4743UA/2K5 be used in single-supply sensor interfaces with ground-referenced inputs?
Yes, OPA4743UA/2K5 supports true single-supply operation down to 3.5V with rail-to-rail input enabling ground-referenced sensing. Its input common-mode range includes V– (ground), allowing direct connection of resistive sensors or bridge outputs to +In/–In pins without level-shifting. The 1pA input bias current prevents loading errors in high-impedance configurations, as verified in the Electrical Characteristics table on page 3 of SBOS201.
Is OPA4743UA/2K5 pin-compatible with other quad op-amps in SO-14 packages?
OPA4743UA/2K5 uses standard SO-14 pinout (Package Drawing D) matching industry conventions for quad op-amps, but it is not functionally pin-compatible with unrelated families (e.g., LM324, TL074) due to differences in supply range, input stage architecture, and output stage behavior. Always verify pin functions against the OPA4743UA/2K5-specific pin diagram in Figure 1 on page 1 of SBOS201 before board reuse.
OPA4743UA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- 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 (x4 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:
- 14-SOIC
OPA4743UA/2K5 FAQ
1.How can I place an order for OPA4743UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4743UA/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 OPA4743UA/2K5 reliable?
The price and inventory of OPA4743UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4743UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA4743UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4743UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4743UA/2K5?
OPA4743UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4743UA/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 OPA4743UA/2K5?
For technical support, including OPA4743UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4743UA/2K5 requirements.
6.How does Aetrix verify that OPA4743UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA4743UA/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 OPA4743UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA4743UA/2K5?
All OPA4743UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4743UA/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 OPA4743UA/2K5 part is unused and in its original packaging.
Return procedure for OPA4743UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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