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Texas Instruments OPA2343UA
- Part No.:
- OPA2343UA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2343UA.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,055
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Product details
Overview
OPA2343UA from Texas Instruments is a dual rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation at 2.7V to 5.5V. It delivers 5.5MHz gain-bandwidth, 6V/µs slew rate, and 850µA per channel quiescent current, with output swing within 1mV of rails under 100kΩ load. It is used in A/D converter driving, audio processing, and active filtering circuits.
For engineers reviewing the OPA2343UA datasheet, OPA2343UA pinout, OPA2343UA application, or OPA2343UA equivalent, key selection considerations include rail-to-rail I/O capability, low THD+N (0.0007% at 1kHz), microamp-level quiescent current, wide common-mode range (–0.3V to V+ + 0.3V), and SO-8 package compatibility with space-constrained PCB layouts.
Technical Context
The OPA2343UA employs a complementary CMOS input stage enabling rail-to-rail input common-mode voltage range extending 500mV beyond supply rails, and a class AB output stage delivering rail-to-rail output swing. Its unity-gain stable architecture supports direct use in noninverting and inverting configurations without external compensation.
It features independent dual-amplifier circuitry minimizing crosstalk, specified over –40°C to +85°C, and operates across –55°C to +125°C. Input bias current is as low as ±0.2pA, and input voltage noise density is 25nV/√Hz at 1kHz - critical for precision signal conditioning in low-noise data acquisition paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5.5MHz - enables stable closed-loop operation up to ~500kHz at G = 10 without phase margin degradation. |
| Slew Rate | 6V/µs - supports clean 1Vpp, 1MHz small-signal output without slew-induced distortion. |
| Input Offset Voltage | ±2mV (typ) - ensures ≤2mV dc error in unity-gain buffer applications at room temperature. |
| THD+N | 0.0007% at 1kHz - meets high-fidelity audio and precision measurement requirements. |
| Quiescent Current | 0.85mA per amplifier - allows dual-channel operation from coin-cell or USB-powered systems. |
| Common-Mode Range | –0.3V to V+ + 0.3V - accepts inputs below ground or above V+, simplifying level-shifting interfaces. |
| Output Swing (100kΩ) | Within 1mV of V+ and V– - maximizes dynamic range in 3.3V or 5V single-supply systems. |
Pinout & Package
OPA2343UA is packaged in an 8-pin SOIC (SO-8) surface-mount package (Package Drawing D), with thermal resistance θJA = 150°C/W. Pinout is identical to industry-standard dual op amp configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Inverting amplifier output channel A; drives loads up to 100kΩ with rail-to-rail swing. |
| 2 | Inverting Input A | –In A node; high-impedance CMOS input (1013Ω || 6pF) accepting signals down to –0.3V. |
| 3 | Non-Inverting Input A | +In A node; complements –In A in parallel P/N input pair for full rail-to-rail common-mode range. |
| 4 | V– | Negative supply terminal; connects to ground or negative rail in single/dual supply configurations. |
| 5 | Non-Inverting Input B | +In B node; electrically isolated from Channel A; enables independent dual-channel signal paths. |
| 6 | Inverting Input B | –In B node; matched to –In A for consistent ac/dc performance across both amplifiers. |
| 7 | Output B | Output channel B; fully independent of Channel A - no crosstalk under dc or 100kHz conditions. |
| 8 | V+ | Positive supply terminal; operates from 2.7V to 5.5V; bypass with 0.01µF ceramic capacitor recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal handling in 3.3V systems without level-shifting circuitry or supply headroom loss. |
| Low quiescent current (0.85mA/ch) | Supports always-on sensor front-ends and battery-powered portable instrumentation with minimal power budget impact. |
| 5.5MHz GBW with unity-gain stability | Permits use in fast-settling filter stages and ADC driver loops without external compensation components. |
| 0.0007% THD+N at 1kHz | Preserves signal integrity in audio line drivers and high-resolution data acquisition where harmonic distortion must be sub-100ppm. |
| Independent dual-channel topology | Eliminates inter-channel coupling in differential signal chains, such as I/V conversion followed by PGA stages. |
Applications
| ADC Driver Circuit | Portable Audio Line Driver |
|---|---|
Use Scenario: Driving the analog input of a 12-bit sampling ADC (e.g., ADS7816) in a handheld data logger. IC Role / Device Role / Timing Role: Buffering high-impedance sensor output while absorbing charge injection from ADC sample switch. Use Value: Rail-to-rail output swing ensures full utilization of ADC's 0–VREF input range; 6V/µs slew rate settles 2V step in <1µs (0.1%). |
Use Scenario: Output stage of a headphone amplifier in a Bluetooth audio receiver with 3.3V supply. IC Role / Device Role / Timing Role: Low-noise, low-distortion voltage follower delivering 0–3.3V signal to 16Ω–32Ω loads via AC-coupled output. Use Value: 0.0007% THD+N preserves audio fidelity; rail-to-rail input accepts DAC output spanning near ground to VDD. |
| Active Anti-Aliasing Filter | Industrial Sensor Signal Conditioning |
Use Scenario: 2nd-order Sallen-Key low-pass filter preceding a 100kHz sampling ADC in motor control feedback. IC Role / Device Role / Timing Role: Dual op amp implementing unity-gain buffer + filter stage with matched channel characteristics. Use Value: 5.5MHz GBW supports filter cutoff up to 20kHz with <0.1dB passband ripple; low IB ensures stable RC time constants. |
Use Scenario: Amplifying mV-level thermocouple or bridge sensor outputs in a factory-floor temperature monitor. IC Role / Device Role / Timing Role: Precision instrumentation-grade gain stage with offset trimming and rail-to-rail output for ADC interface. Use Value: ±2mV max VOS minimizes calibration burden; 25nV/√Hz input noise maintains >14-bit ENOB at 10Hz bandwidth. |
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 |
|---|---|---|---|
| OPA2343EA | Identical electrical specs; packaged in MSOP-8 (DGK) instead of SO-8 (D); θJA = 150°C/W same, but smaller footprint (3mm × 3mm vs 4.9mm × 6mm). | Better suited for ultra-compact PCBs where board area is constrained; requires finer-pitch reflow profile. | Select OPA2343EA when layout space is premium and assembly process supports MSOP; otherwise OPA2343UA offers broader manufacturability. |
| MCP6022-I/SN | Lower GBW (10MHz), higher IQ (1mA/ch), wider VS range (2.7V–6.0V); offset voltage ±3mV (max), THD+N 0.001%. | Compatible for general-purpose dual op amp roles but less optimal for low-distortion audio or precision ADC driving. | Choose MCP6022-I/SN only if higher bandwidth is prioritized over THD+N and quiescent current; verify PSRR/CMRR match for sensitive sensor nodes. |
Compared with OPA2343EA and MCP6022-I/SN, the OPA2343UA uniquely balances ultra-low THD+N, rail-to-rail I/O, and SO-8 manufacturability - making it the preferred choice for cost-sensitive, space-aware designs requiring high-fidelity signal integrity without MSOP-level assembly complexity.
Availability
OPA2343UA is available at Aetrix Electronics and suitable for data acquisition, portable audio, and industrial sensor signal conditioning requiring stable component supply and long-term production continuity.
Supply support for OPA2343UA 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 OPA2343UA belongs to TI's microAmplifier™ series - designed specifically for miniature, low-voltage, single-supply applications demanding rail-to-rail performance, low power, and high-speed precision.
FAQ
What is the operating supply voltage range for the OPA2343UA?
The OPA2343UA operates from a single supply of 2.7V to 5.5V, with full specifications guaranteed over 2.7V to 5V. It functions down to 2.5V, though some parameters may degrade outside the guaranteed range. This makes the OPA2343UA suitable for battery-powered devices using Li-ion, alkaline, or regulated 3.3V supplies. The OPA2343UA maintains rail-to-rail input/output behavior across this entire range.
Does the OPA2343UA support rail-to-rail input and output simultaneously?
Yes, the OPA2343UA supports true rail-to-rail input and output operation. Its input common-mode range extends from –0.3V to V+ + 0.3V, and its output swings to within 1mV of both supply rails under light load (100kΩ). This simultaneous capability allows the OPA2343UA to interface directly with low-voltage ADCs and DACs without external level-shifting circuitry, preserving dynamic range in 3.3V or 5V systems.
What is the typical quiescent current per channel for the OPA2343UA?
The typical quiescent current per channel for the OPA2343UA is 0.85mA at +5V supply and +25°C. Maximum is 1.25mA over temperature. This low IQ enables dual-channel operation in power-sensitive applications such as portable instrumentation and always-on sensor nodes. The OPA2343UA draws less than 1.7mA total for both amplifiers - significantly lower than many competing dual op amps.
Can the OPA2343UA drive capacitive loads, and what is the recommended approach?
The OPA2343UA can drive up to ~1000pF capacitively in unity-gain configuration while maintaining stability. For larger loads or higher gains, adding a 10Ω–20Ω series resistor between the output and capacitive load improves phase margin and reduces ringing. This technique is documented in TI's SBOS090A datasheet for the OPA2343UA and preserves functionality without requiring external compensation networks.
Is the OPA2343UA pin-compatible with other dual op amps in SO-8 packages?
The OPA2343UA uses the standard dual op amp pinout (pin 1 = Out A, pin 2 = –In A, pin 3 = +In A, pin 4 = V–, pin 5 = +In B, pin 6 = –In B, pin 7 = Out B, pin 8 = V+), matching industry conventions. While not guaranteed drop-in compatible with all SO-8 dual op amps due to differences in bandwidth, noise, or input structure, it is mechanically and electrically pinout-compatible with devices like the LM358, TL072, and MCP6022 - enabling direct replacement in many layouts after verifying ac/dc performance requirements.
OPA2343UA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- 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:
- 6V/µs
- Gain Bandwidth Product:
- 5.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 850µA (x2 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:
- 8-SOIC
OPA2343UA FAQ
1.How can I place an order for OPA2343UA through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2343UA 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 OPA2343UA reliable?
The price and inventory of OPA2343UA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2343UA is usually 5 days.
3.What payment methods are accepted for OPA2343UA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2343UA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2343UA?
OPA2343UA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2343UA 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 OPA2343UA?
For technical support, including OPA2343UA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2343UA requirements.
6.How does Aetrix verify that OPA2343UA is sourced from the original manufacturer or authorized distributors?
All OPA2343UA 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 OPA2343UA meets industry standards.
7.What is the process for return or replacement of OPA2343UA?
All OPA2343UA units undergo pre-shipment inspection (PSI). If there is an issue with OPA2343UA, 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 OPA2343UA part is unused and in its original packaging.
Return procedure for OPA2343UA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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