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Texas Instruments OPA4743UA
- Part No.:
- OPA4743UA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4743UA.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:160
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Product details
Overview
OPA4743UA from Texas Instruments is a quad rail-to-rail input/output CMOS operational amplifier optimized for 12V single-supply or ±6V dual-supply operation, delivering 7MHz gain-bandwidth, 10V/µs slew rate, and 1.1mA quiescent current per amplifier. It features 1pA input bias current, 84dB CMRR at full scale, and rail-to-rail output swing to within 100mV of rails under light load - making it ideal for LCD gamma correction reference buffering in TFT display driver circuits.
For engineers reviewing the OPA4743UA datasheet, OPA4743UA pinout, OPA4743UA application, or OPA4743UA equivalent, key selection considerations include its TSSOP-14/SO-14 package compatibility, quad-channel layout for multi-reference buffering, 12V operation margin for automotive sensor front-ends, and verified capacitive load drive up to 1000pF with external series isolation resistors.
Technical Context
The OPA4743UA employs a complementary N/P-channel input stage enabling rail-to-rail common-mode input range extending 100mV beyond supply rails, with a defined 500mV transition region where both pairs are active. Its class AB output stage supports rail-to-rail output swing while maintaining ≥100dB open-loop gain into 100kΩ loads.
Designed for unity-gain stability, the device delivers 0.0008% THD+N at 6kHz and exhibits low noise (30nV/√Hz voltage noise density, 2.5fA/√Hz current noise density), supporting precision signal conditioning in data acquisition and transducer amplifier applications across –40°C to +85°C.
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 1Vpp signals up to ~1.6MHz without slew-induced distortion in unity-gain buffers. |
| Input Bias Current | 1pA - minimizes offset error in high-impedance sensor interfaces (e.g., photodiode, piezoelectric transducers). |
| Output Swing (RL = 100kΩ) | Within 100mV of rails - preserves full dynamic range in 3.5V–12V single-supply systems like portable medical monitors. |
| Quiescent Current per Amp | 1.1mA - allows four independent channels to operate below 4.4mA total, critical for battery-powered LCD gamma reference banks. |
| CMRR (full-scale) | 84dB - rejects power supply ripple and common-mode noise in noisy automotive environments (e.g., infotainment display modules). |
| Supply Range | 3.5V to 12V single / ±1.75V to ±6V dual - accommodates legacy 5V logic rails and modern 12V automotive subsystems without level-shifting. |
Pinout & Package
OPA4743UA is packaged in SOIC-14 (package drawing D), a 14-pin surface-mount small-outline integrated circuit with 1.27mm pitch and 8.65mm × 3.91mm body dimensions. Pin 1 is located at the top-left corner marked by a beveled edge or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives first gamma reference string; requires 20Ω series resistor when buffering >100nF capacitive loads. |
| 2 | –In A | Inverting input for Channel A - connects to feedback network in inverting configurations or ground in non-inverting buffers. |
| 3 | +In A | Non-inverting input for Channel A - accepts reference voltage (e.g., DAC output) with <1pA leakage impact on accuracy. |
| 4 | V– | Negative supply rail - tied to ground in single-supply mode; must be bypassed with 1µF tantalum + 1000pF ceramic. |
| 5 | +In C | Non-inverting input for Channel C - used in parallel reference bank architectures to distribute gamma voltage tiers. |
| 6 | –In C | Inverting input for Channel C - configured as unity-gain follower input for third gamma reference channel. |
| 7 | Out C | Amplifier C output - drives third gamma reference string; electrically isolated from Out A/B/D via internal die layout. |
| 8 | Out A | Amplifier A output - duplicate pin for thermal relief; must be connected to same net as Pin 1. |
| 9 | –In A | Inverting input for Channel A - duplicate pin for layout routing flexibility; ties internally to Pin 2. |
| 10 | +In A | Non-inverting input for Channel A - duplicate pin; ties internally to Pin 3. |
| 11 | V+ | Positive supply rail - accepts 12V for maximum output swing; requires local 1µF + 1000pF decoupling. |
| 12 | +In B | Non-inverting input for Channel B - receives second gamma reference voltage; shares bias current spec with all inputs. |
| 13 | –In B | Inverting input for Channel B - configured as virtual ground in differential receiver setups. |
| 14 | Out B | Amplifier B output - drives second gamma reference string; rated for ±20mA continuous output into 1kΩ loads. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal handling from 0V to V+ in single-supply LCD gamma systems without clipping or headroom loss. |
| 12V operation capability | Supports direct interface with 10V LCD source driver power rails, eliminating need for intermediate regulators in display modules. |
| 1pA input bias current | Preserves accuracy in high-impedance reference ladder networks (e.g., 1MΩ resistor strings) with sub-mV offset contribution. |
| Quad-channel integration | Reduces PCB area and component count vs discrete op-amps for multi-tier gamma voltage generation (GMA1–GMA4). |
| Capacitive load drive (1000pF) | Stabilizes against charge injection glitches from LCD DAC switching without external compensation in reference buffer roles. |
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 reference voltages (GMA1–GMA10) from a resistive ladder. IC Role / Device Role / Timing Role: Quad op-amp configured as unity-gain followers, each buffering one reference tier with 20Ω isolation resistors and 100nF local charge reservoirs. Use Value: Rail-to-rail output swing to within 100mV of 12V rail maintains >99% dynamic range; 1.1mA per amp enables full quad operation under 4.4mA total system budget. | Use Scenario: Amplifying low-level signals from automotive cabin temperature, pressure, or position sensors operating in 5V–12V domains. IC Role / Device Role / Timing Role: Single-channel configuration (using one OPA4743UA amplifier) as a precision non-inverting amplifier with programmable gain. Use Value: 84dB CMRR rejects engine bay EMI; 1pA input bias prevents drift in thermistor-based sensing; 7MHz GBW supports fast transient response in ADAS proximity detection. |
| Portable Medical Monitor Front-End | Data Acquisition System Input Stage |
Use Scenario: Conditioning biopotential signals (ECG, EEG) in battery-powered handheld diagnostic devices with strict power constraints. IC Role / Device Role / Timing Role: Dual-channel use (two amplifiers) for differential instrumentation amplifier front-end with selectable gain and filtering. Use Value: 30nV/√Hz input voltage noise ensures <5µVrms integrated noise over 0.05–150Hz band; 1.1mA quiescent current extends battery life in 24-hour continuous monitoring. | Use Scenario: Buffering multiplexed analog inputs before ADC sampling in industrial PLC modules requiring 16-bit accuracy. IC Role / Device Role / Timing Role: Quad configuration driving four independent ADC input channels with simultaneous sampling support. Use Value: 0.0008% THD+N preserves signal fidelity for audio-grade measurements; rail-to-rail input accepts ±10V industrial sensor outputs without attenuation. |
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 | TSSOP-14 package (vs SOIC-14); identical electrical specs; MSL Level-2 vs Level-1 moisture sensitivity. | Better suited for high-density PCB layouts where footprint reduction is critical; requires tighter reflow profile control. | Select OPA4743EA for space-constrained designs; choose OPA4743UA for through-hole prototyping or legacy SOIC assembly lines. |
| TLV2474IDR | Lower GBW (2.8MHz), higher IQ (650µA per amp), wider supply range (2.7–6V), no 12V rating. | Only viable for low-voltage (<6V) portable equipment; unsuitable for 12V LCD gamma or automotive 12V sensor front-ends. | Use TLV2474IDR only in sub-6V battery systems where power efficiency outweighs bandwidth needs; avoid for OPA4743UA's 12V target applications. |
Compared with OPA4743EA and TLV2474IDR, the OPA4743UA provides unique 12V operation margin, 7MHz bandwidth, and SOIC-14 manufacturability - making it the sole choice for LCD gamma reference buffering and 12V automotive sensor conditioning where rail-to-rail performance at full supply is mandatory.
Availability
OPA4743UA is available at Aetrix Electronics and suitable for LCD gamma correction, automotive sensor signal conditioning, and portable medical monitor front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA4743UA 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 over 90 years of innovation in precision amplifiers and power management ICs.
The OPA4743UA belongs to TI's high-speed precision op-amp product line, engineered specifically for rail-to-rail performance in 12V display and automotive subsystems where dynamic range, low power, and multi-channel integration are critical.
FAQ
What is the maximum supply voltage rating for the OPA4743UA?
The OPA4743UA has an absolute maximum supply voltage rating of 13.2V between V+ and V– pins. Its specified operating range is 3.5V to 12V for single-supply use and ±1.75V to ±6V for dual-supply configurations. Exceeding 12V during normal operation risks violating guaranteed AC performance specs such as gain-bandwidth and slew rate, though the device remains functional up to 13.2V per absolute maximum ratings.
Does the OPA4743UA support true rail-to-rail input common-mode range?
Yes, the OPA4743UA supports rail-to-rail input with common-mode voltage range extending 100mV beyond both supply rails at room temperature. This is achieved using a complementary N/P-channel input stage. A defined 500mV transition region exists near mid-supply where both input pairs are active, causing minor variations in CMRR and THD - but full rail-to-rail functionality is maintained across the entire range from (V–) – 0.1V to (V+) + 0.1V.
Can the OPA4743UA drive heavy capacitive loads without oscillation?
The OPA4743UA can directly drive up to 1000pF pure capacitive loads while remaining stable. For unity-gain configurations with larger loads (e.g., LCD DAC charge injection), inserting a 20Ω resistor inside the feedback loop - as documented in Figure 4 of the SBOS201 datasheet - isolates the op-amp output and eliminates ringing. This technique preserves DC accuracy while improving settling time in OPA4743UA reference buffer applications.
What is the thermal resistance (θJA) of the OPA4743UA in SOIC-14 package?
The OPA4743UA in SOIC-14 package has a junction-to-ambient thermal resistance (θJA) of 100°C/W, as specified in the Electrical Characteristics table of the SBOS201 datasheet. This value assumes standard JEDEC 2-layer board conditions. With 1.1mA quiescent current per amplifier and four active channels, total power dissipation remains below 53mW at 12V supply, resulting in <6°C junction-to-ambient rise under typical conditions - well within safe operating limits.
Is the OPA4743UA pin-compatible with other members of the OPA743 family?
No, the OPA4743UA is not pin-compatible with the single-channel OPA743 or dual-channel OPA2743. It uses a dedicated 14-pin SOIC layout optimized for quad operation, with specific pin assignments for four independent amplifiers (A–D), shared supplies, and duplicated output/input pins for layout flexibility. Pin mapping differs fundamentally from the 5-pin SOT23 (OPA743NA), 8-pin SOIC (OPA743UA/OPA2743UA), and 14-pin TSSOP (OPA4743EA) variants.
OPA4743UA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for OPA4743UA through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4743UA 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 reliable?
The price and inventory of OPA4743UA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4743UA is usually 5 days.
3.What payment methods are accepted for OPA4743UA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4743UA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4743UA?
OPA4743UA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4743UA 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?
For technical support, including OPA4743UA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4743UA requirements.
6.How does Aetrix verify that OPA4743UA is sourced from the original manufacturer or authorized distributors?
All OPA4743UA 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 meets industry standards.
7.What is the process for return or replacement of OPA4743UA?
All OPA4743UA units undergo pre-shipment inspection (PSI). If there is an issue with OPA4743UA, 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 part is unused and in its original packaging.
Return procedure for OPA4743UA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4743UA Tags
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