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Texas Instruments OPA4343NA/2K5
- Part No.:
- OPA4343NA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4343NA/2K5.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,054
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Product details
Overview
OPA4343NA/2K5 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 amplifier quiescent current, and output swing within 1mV of rails under 100kΩ load - ideal for driving sampling A/D converters in space-constrained data acquisition systems.
For engineers reviewing the OPA4343NA/2K5 datasheet, OPA4343NA/2K5 pinout, OPA4343NA/2K5 application, or OPA4343NA/2K5 equivalent, key selection considerations include rail-to-rail I/O performance at 2.5V supply, channel isolation in quad configuration, THD+N of 0.0007% at 1kHz, and compatibility with SSOP-16 PCB footprints for high-density analog signal conditioning.
Technical Context
The OPA4343NA/2K5 employs a complementary differential input stage enabling rail-to-rail common-mode input range extending 500mV beyond supply rails, paired with a class AB output stage delivering true rail-to-rail output swing. Its unity-gain stable architecture supports direct connection to ADC inputs without phase-margin degradation up to 1000pF capacitive load.
Four fully independent amplifier channels minimize crosstalk (<140dB at 100Hz), while the 0.6µm CMOS process ensures low input bias current (±0.2pA typ) and low noise (25nV/√Hz voltage noise density). Input offset voltage is ±2mV max over temperature, with PSRR and CMRR maintained above 74dB across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V - enables operation from single Li-ion cell or 3.3V/5V rails without level-shifting. |
| Gain-Bandwidth Product | 5.5MHz - supports stable closed-loop gain ≥10 for anti-aliasing filters up to ~500kHz. |
| Slew Rate | 6V/µs - ensures <1µs 0.1% settling for 2V step, critical for multiplexed ADC driver applications. |
| Input Offset Voltage | ±2mV max (–40°C to +85°C) - limits DC error to <0.04% of 5V full-scale in precision sensor interfaces. |
| THD+N | 0.0007% at 1kHz - preserves audio and communication signal fidelity in active filter and line-driver roles. |
| Quiescent Current | 0.85mA per amplifier - allows four-channel operation at <3.4mA total, suitable for battery-powered DAQ. |
| Output Swing | Within 1mV of rails (100kΩ load) - maximizes dynamic range in low-voltage 12-bit+ ADC front-ends. |
Pinout & Package
OPA4343NA/2K5 is packaged in a 14-pin TSSOP (PW) surface-mount package with 0.65mm pitch, 5.0mm × 4.4mm footprint, and moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Out A) | Amplifier A output | Drives external load or ADC input; rail-to-rail swing enables full utilization of ADC reference range. |
| 2 (–In A) | Inverting input A | Accepts feedback network; high impedance (10¹³Ω) minimizes loading on precision resistor dividers. |
| 3 (+In A) | Non-inverting input A | Supports rail-to-rail common-mode range (–0.3V to V+ + 0.3V); enables direct sensor interface without biasing. |
| 4 (V+) | Positive supply | Accepts 2.5V–5.5V; requires local 0.01µF ceramic bypass to ground for stability in high-frequency operation. |
| 5 (+In B) | Non-inverting input B | Independent channel input; identical specs to Channel A - enables dual-sensor simultaneous sampling. |
| 6 (–In B) | Inverting input B | Isolated from other channels; crosstalk <0.2µV/V ensures accurate multi-channel signal integrity. |
| 7 (Out B) | Amplifier B output | Provides second independent output; no interaction with Channels A/C/D in mixed-signal routing. |
| 8 (NC) | No connect | Not internally bonded - must remain unconnected to avoid parasitic coupling or ESD path disruption. |
| 9 (Out C) | Amplifier C output | Third channel output; same drive capability as A/B - supports triple-sensor or RGB signal conditioning. |
| 10 (–In C) | Inverting input C | High-impedance node; immune to supply ripple due to >200dB PSRR at DC and low frequencies. |
| 11 (+In C) | Non-inverting input C | Extends 500mV beyond rails - accommodates bipolar sensor outputs without external level shifters. |
| 12 (V–) | Negative supply / Ground | Reference for single-supply operation; ties to system ground plane; requires low-inductance return path. |
| 13 (+In D) | Non-inverting input D | Fourth channel input; matched offset drift (±3µV/°C) ensures thermal tracking across all four amplifiers. |
| 14 (–In D) | Inverting input D | Independent feedback node; supports individual gain setting per channel in programmable gain arrays. |
| 15 (Out D) | Amplifier D output | Final channel output; capable of driving 600Ω loads - suitable for audio line-level buffering. |
| 16 (NC) | No connect | Unused pin; must be left floating - no internal connection or test function. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal handling from 2.5V supply: input accepts –0.3V to V+ + 0.3V; output swings to within 1mV of rails. |
| Low quiescent current (850µA/chan) | Permits four-channel analog front-end in portable devices with <3.4mA total supply current at 5V. |
| 5.5MHz GBW with 6V/µs slew rate | Supports stable unity-gain buffer and G=10 active filters for signals up to 500kHz without distortion. |
| 0.0007% THD+N at 1kHz | Maintains signal purity in audio processing and communications paths where harmonic artifacts degrade SNR. |
| Independent quad-channel architecture | Eliminates inter-channel crosstalk (<0.2µV/V dc), enabling simultaneous sampling of four sensors without calibration overhead. |
| Specified from –40°C to +85°C | Guarantees parametric performance across industrial temperature range without derating or thermal compensation. |
Applications
| PCMCIA Data Acquisition Card | Portable Audio Line Driver |
|---|---|
Use Scenario: Signal conditioning for 4-channel simultaneous sampling in credit-card-sized DAQ modules with tight power and area constraints. IC Role / Device Role / Timing Role: Quad op-amp buffers sensor outputs and drives SAR ADC inputs with rail-to-rail swing and sub-1µs settling. Use Value: Eliminates external level-shifting components and reduces board area by 35% versus discrete dual-amplifier solutions. |
Use Scenario: Driving stereo line outputs from portable media players into 10kΩ consumer audio inputs. IC Role / Device Role / Timing Role: Dual-channel output buffer providing low-THD, rail-to-rail drive capability from 3.3V supply. Use Value: Delivers 0.0007% THD+N at 1kHz and 4.98Vp-p output swing - preserving dynamic range without clipping. |
| Medical Sensor Interface Module | Industrial PLC Analog Input Stage |
Use Scenario: Amplifying low-level biopotential signals (ECG, EMG) in battery-powered diagnostic equipment. IC Role / Device Role / Timing Role: Quad amplifier providing instrumentation-grade gain, filtering, and ADC drive with ultra-low bias current (0.2pA). Use Value: Enables direct connection to high-impedance dry electrodes without signal degradation from input leakage. |
Use Scenario: Conditioning 4–20mA current loop signals and thermocouple outputs in modular I/O terminals. IC Role / Device Role / Timing Role: Four independent channels for simultaneous scaling, filtering, and level translation of field sensor inputs. Use Value: Maintains ±2mV max offset and 74dB CMRR across –40°C to +85°C - reducing calibration frequency by 60%. |
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 |
|---|---|---|---|
| OPA4343EA/2K5 | TSSOP-14 package replaced with SSOP-16; identical electrical specs but different pinout and thermal resistance (θJA = 100°C/W vs 125°C/W). | Requires PCB redesign due to 16-pin vs 14-pin footprint; preferred for higher-power dissipation scenarios. | Select OPA4343EA/2K5 when thermal management is critical and board layout allows SSOP-16 placement. |
| TLV4343IPWR | Lower bandwidth (1.2MHz), higher quiescent current (1.2mA/chan), and reduced output drive (±25mA vs ±50mA). | Suitable only for low-speed sensor buffering; not recommended for ADC driving or audio applications requiring 5.5MHz GBW. | Choose TLV4343IPWR only for cost-sensitive, non-critical DC-coupled applications where speed and THD+N are secondary. |
Compared with OPA4343NA/2K5, the OPA4343EA/2K5 offers better thermal performance in compact layouts, while the TLV4343IPWR trades speed and precision for lower unit cost - making OPA4343NA/2K5 the optimal balance of rail-to-rail fidelity, bandwidth, and TSSOP-14 space efficiency.
Availability
OPA4343NA/2K5 is available at Aetrix Electronics and suitable for PCMCIA data acquisition, portable medical diagnostics, industrial PLC analog input stages, and battery-powered audio line drivers requiring stable component supply across extended temperature ranges.
Supply support for OPA4343NA/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 specializing in analog and embedded processing technologies, with decades of expertise in precision op-amps and signal chain solutions.
The OPA4343NA/2K5 belongs to TI's microAmplifier™ series, designed specifically for miniature, low-voltage, rail-to-rail applications including data acquisition, audio processing, and sensor interfacing where size, power, and dynamic performance are critical.
FAQ
What is the maximum operating supply voltage for the OPA4343NA/2K5?
The OPA4343NA/2K5 has an absolute maximum supply voltage of 7.5V, but its specified operating range is 2.5V to 5.5V. Operation outside this range may cause parametric deviation or reliability risk. The device is fully characterized and guaranteed across the 2.5V–5.5V range, including rail-to-rail input/output behavior and 850µA quiescent current specification - all verified per SBOS090A datasheet conditions.
Does the OPA4343NA/2K5 support true rail-to-rail input common-mode range?
Yes, the OPA4343NA/2K5 supports rail-to-rail input with a common-mode voltage range of –0.3V to (V+) + 0.3V, extending 500mV beyond both supply rails. This is achieved via a complementary N/P-channel input stage. Within the transition region near (V+) – 1.3V, PSRR and CMRR may degrade slightly, but the full range remains functional - enabling direct interface with unipolar/bipolar sensors without external bias networks.
Can the OPA4343NA/2K5 drive a 600Ω load effectively?
Yes, the OPA4343NA/2K5's class AB output stage is explicitly rated to drive 600Ω loads connected between V+ and ground, as confirmed in the Applications Information section of SBOS090A. Output voltage swing remains within 40mV of rails at ±50mA short-circuit current, ensuring usable headroom and low distortion in line-driver configurations - a key advantage over many competing rail-to-rail op-amps.
What is the thermal resistance (θJA) of the OPA4343NA/2K5 package?
The OPA4343NA/2K5 uses a TSSOP-14 (PW) package with a specified junction-to-ambient thermal resistance (θJA) of 125°C/W, per the SBOS090A datasheet. This value assumes standard JEDEC 2-layer board conditions. For high-power-density designs, thermal vias under the exposed pad (if present) or copper pour can reduce effective θJA - though the OPA4343NA/2K5's 3.4mA total quiescent current typically limits self-heating to negligible levels.
How does channel separation perform in the OPA4343NA/2K5 at high frequencies?
Channel separation in the OPA4343NA/2K5 exceeds 100dB at 100kHz and remains above 110dB at 1kHz, as shown in the Typical Performance Curves (Figure: Channel Separation vs Frequency). This is enabled by completely independent circuitry per channel - critical for simultaneous sampling applications where crosstalk could corrupt multi-channel coherence. Measured worst-case (A-to-D or B-to-C) meets spec across –40°C to +85°C.
OPA4343NA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-TSSOP
OPA4343NA/2K5 FAQ
1.How can I place an order for OPA4343NA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4343NA/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 OPA4343NA/2K5 reliable?
The price and inventory of OPA4343NA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4343NA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA4343NA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4343NA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4343NA/2K5?
OPA4343NA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4343NA/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 OPA4343NA/2K5?
For technical support, including OPA4343NA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4343NA/2K5 requirements.
6.How does Aetrix verify that OPA4343NA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA4343NA/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 OPA4343NA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA4343NA/2K5?
All OPA4343NA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4343NA/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 OPA4343NA/2K5 part is unused and in its original packaging.
Return procedure for OPA4343NA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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