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Texas Instruments OPA4343UA
- Part No.:
- OPA4343UA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4343UA.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:893
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Product details
Overview
OPA4343UA from Texas Instruments is a quad rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation (2.5V to 5.5V). It delivers 5.5MHz gain-bandwidth, 6V/µs slew rate, 850µA per channel quiescent current, and output swing within 1mV of rails under 100kΩ load - enabling high-fidelity signal conditioning in space-constrained data acquisition and audio systems.
For engineers reviewing the OPA4343UA datasheet, OPA4343UA pinout, OPA4343UA application, or OPA4343UA equivalent, key selection criteria include rail-to-rail dynamic range at 2.5V supply, channel isolation in quad configuration, THD+N of 0.0007% at 1kHz, and SSOP-16 thermal resistance (θJA = 100°C/W) for thermally demanding PCB layouts.
Technical Context
The OPA4343UA employs a complementary CMOS input stage with parallel N-channel and P-channel differential pairs, extending common-mode voltage range 500mV beyond both supply rails. Its class AB output stage enables true rail-to-rail swing while maintaining >100dB open-loop gain into 100kΩ loads.
Designed for unity-gain stability, it drives capacitive loads up to 1000pF without external compensation and achieves 0.1% settling in 1µs with 2V step and 100pF load. Channel separation exceeds 100dB at 1kHz, ensuring minimal crosstalk in multi-channel sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5.5MHz - supports stable closed-loop gain ≥10 at 500kHz for anti-aliasing filter design |
| Slew Rate | 6V/µs - preserves 10-bit linearity for 100kHz full-scale signals driving ADC inputs |
| Input Offset Voltage | ±2mV (max) - limits DC error to <0.1% of 5V full-scale in precision buffer applications |
| Quiescent Current | 0.85mA per channel - enables four-channel signal conditioning at <3.4mA total for battery-powered DAQ |
| Output Swing | Within 1mV of rails (100kΩ) - maximizes dynamic range in 3.3V or 5V single-supply systems |
| THD+N | 0.0007% at 1kHz - meets CD-quality audio requirements without post-filtering |
| Common-Mode Range | –0.3V to (V+) + 0.3V - accepts bipolar input signals even with single 2.7V supply |
Pinout & Package
OPA4343UA is packaged in a 16-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, 5.3mm × 6.2mm body size, and θJA = 100°C/W for efficient thermal dissipation in dense layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 13 | Output A/B/C/D | Amplifier outputs - each capable of sourcing/sinking ±50mA and swinging to rail |
| 2, 6, 10, 14 | Inverting Input A/B/C/D | Differential input pins - high-impedance (1013Ω) CMOS nodes with ±10pA bias current |
| 3, 7, 11, 15 | Non-inverting Input A/B/C/D | Differential input pins - support common-mode voltage beyond rails by 500mV |
| 4 | Negative Supply (V–) | Ground reference for single-supply operation or negative rail in dual-supply configurations |
| 16 | Positive Supply (V+) | Accepts 2.5V–5.5V - internal regulation ensures stable performance across full range |
| 8, 12 | No Connect (NC) | Unbonded pins - must remain floating; no internal connection or function |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full 0–5V signal handling with 2.7V supply, eliminating level-shifting circuitry |
| Low quiescent current (850µA/channel) | Supports always-on sensor front-ends with <3.4mA total for all four amplifiers |
| High channel separation (>100dB) | Prevents inter-channel crosstalk in multi-sensor analog acquisition systems |
| Unity-gain stable with 1000pF capacitive load | Eliminates need for external compensation when driving ADC sample-and-hold capacitors |
| Specified from –40°C to +85°C | Guarantees parametric performance in industrial temperature environments |
Applications
| Driving A/D Converters | PCMCIA Card Signal Conditioning |
|---|---|
Use Scenario: Buffering and gain-setting for 12-bit sampling ADCs like ADS7816 in portable instrumentation. IC Role / Device Role / Timing Role: High-speed, low-noise op-amp providing charge injection immunity and rail-to-rail drive capability to ADC input capacitance. Use Value: Maintains 0.0007% THD+N at 1kHz while settling to 0.1% in 1µs - preserving effective resolution of medium-speed converters. |
Use Scenario: Signal amplification and filtering in PCMCIA Type II card-based data loggers with tight board area constraints. IC Role / Device Role / Timing Role: Quad amplifier implementing simultaneous I/V conversion, anti-aliasing, and level-shifting functions. Use Value: SSOP-16 footprint (5.3×6.2mm) replaces four discrete SO-8 op-amps, reducing layout area by >60%. |
| Audio Line-Level Processing | Active Filter for Sensor Interfaces |
Use Scenario: Low-distortion pre-amplification and tone control in portable audio recorders powered from single Li-ion cells. IC Role / Device Role / Timing Role: Rail-to-rail output stage delivering full 0–3.3V swing into 10kΩ headphone loads at 3.3V supply. Use Value: 25nV/√Hz input voltage noise and 0.0007% THD+N meet consumer audio fidelity requirements without external trimming. |
Use Scenario: 2nd-order Sallen-Key low-pass filtering for MEMS accelerometer outputs in condition monitoring systems. IC Role / Device Role / Timing Role: Dual amplifier implementing filter topology with one section as integrator and second as gain stage. Use Value: 5.5MHz GBW supports filter cutoffs up to 100kHz while maintaining phase margin >45° across temperature. |
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 |
|---|---|---|---|
| OPA4342UA | Lower GBW (1MHz), higher IQ (1.6mA/channel), same SSOP-16 package | Better suited for ultra-low-power DC-coupled sensor interfaces where speed <100kHz | Select OPA4342UA when power budget is tighter than bandwidth requirement |
| MCP4441-E/SL | Quad op-amp with integrated 10-bit DAC per channel; 2.7V–5.5V supply; 2.8MHz GBW | Replaces discrete DAC + op-amp combos in programmable gain amplifier designs | Choose MCP4441-E/SL when digital gain control and calibration are required on-chip |
Compared with OPA4343UA, OPA4342UA trades 82% bandwidth for 47% lower quiescent current, while MCP4441-E/SL adds programmability at the cost of 49% lower GBW - making OPA4343UA optimal for fixed-gain, high-fidelity, medium-speed signal chains.
Availability
OPA4343UA is available at Aetrix Electronics and suitable for data acquisition, portable audio processing, and PCMCIA card designs requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for OPA4343UA 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 signal chain solutions.
The OPA343 family - including OPA4343UA - was designed specifically for low-cost, miniature, single-supply applications demanding rail-to-rail performance, low distortion, and wide bandwidth in compact packages.
FAQ
What supply voltage range does the OPA4343UA support?
The OPA4343UA operates from 2.5V to 5.5V, with full parametric specifications guaranteed from 2.7V to 5.0V across –40°C to +85°C. This allows reliable use in Li-ion (3.0–4.2V), USB-powered (4.75–5.25V), and legacy 5V systems - and extends functionality to 2.5V for ultra-low-power sensor nodes where performance remains usable though not fully specified.
Does the OPA4343UA require external compensation for unity-gain stability?
No, the OPA4343UA is internally compensated for unity-gain stability and drives up to 1000pF capacitive loads without oscillation. This eliminates external compensation components when buffering ADC inputs or driving cables, simplifying layout and reducing BOM count - confirmed by TI's SBOS090A datasheet Figure 7 small-signal overshoot curves.
How does the rail-to-rail input stage of the OPA4343UA behave near the supply rails?
The OPA4343UA uses parallel N-channel and P-channel input stages, enabling common-mode input down to –0.3V and up to (V+) + 0.3V. Within a ~400mV transition region near (V+) – 1.3V, both stages conduct - causing temporary degradation in PSRR, CMRR, and THD. For critical precision, keep input signals outside this zone or verify performance in-system.
What is the thermal performance of the OPA4343UA in SSOP-16 package?
The OPA4343UA in SSOP-16 has a junction-to-ambient thermal resistance (θJA) of 100°C/W. At maximum quiescent current (1.25mA/channel × 4 = 5mA), power dissipation is ~25mW at 5V - resulting in <2.5°C junction rise above ambient. This enables reliable operation in sealed enclosures without forced airflow or heatsinking.
Can the OPA4343UA drive 600Ω audio loads?
Yes - the OPA4343UA's class AB output stage is explicitly rated to drive 600Ω loads connected anywhere between V+ and ground, as stated in TI's SBOS090A Applications Information section. Output swing remains within 50mV of rails at ±20mA, supporting professional line-level (-10dBV to +4dBu) signal integrity without clipping.
OPA4343UA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- 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:
- 6V/µs
- Gain Bandwidth Product:
- 5.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 850µA (x4 Channels)
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
OPA4343UA FAQ
1.How can I place an order for OPA4343UA through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4343UA 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 OPA4343UA reliable?
The price and inventory of OPA4343UA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4343UA is usually 5 days.
3.What payment methods are accepted for OPA4343UA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4343UA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4343UA?
OPA4343UA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4343UA 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 OPA4343UA?
For technical support, including OPA4343UA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4343UA requirements.
6.How does Aetrix verify that OPA4343UA is sourced from the original manufacturer or authorized distributors?
All OPA4343UA 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 OPA4343UA meets industry standards.
7.What is the process for return or replacement of OPA4343UA?
All OPA4343UA units undergo pre-shipment inspection (PSI). If there is an issue with OPA4343UA, 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 OPA4343UA part is unused and in its original packaging.
Return procedure for OPA4343UA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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