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Texas Instruments OPA4343NA/250
- Part No.:
- OPA4343NA/250
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4343NA/250.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,346
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Product details
Overview
OPA4343NA/250 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, and 850µA per amplifier quiescent current, enabling high-fidelity signal conditioning in space-constrained data acquisition and A/D converter driver applications.
For engineers reviewing the OPA4343NA/250 datasheet, OPA4343NA/250 pinout, OPA4343NA/250 application, or OPA4343NA/250 equivalent, key selection criteria include rail-to-rail swing within 1mV of rails (100kΩ load), ±2mV max input offset voltage, <0.0007% THD+N at 1kHz, and TSSOP-14 package compatibility with high-density PCB layouts.
Technical Context
The OPA4343NA/250 employs a complementary CMOS input stage enabling rail-to-rail input common-mode 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 driving capacitive loads up to 1000pF without external compensation.
Each of the four amplifiers features fully independent circuitry-ensuring minimal crosstalk (<0.2µV/V channel separation) and no interaction between channels-critical for multi-channel sensor interfaces and simultaneous-sampling systems where signal integrity across channels must be preserved.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5.5MHz - enables stable closed-loop operation up to 100kHz with gain ≥10, suitable for anti-aliasing and reconstruction filters. |
| Slew Rate | 6V/µs - supports clean 3Vp-p output at 1MHz without slew-induced distortion in audio and communication signal paths. |
| Input Offset Voltage | ±2mV (max) - ensures ≤20mV full-scale error in 10-bit ADC driver applications with 5V reference. |
| THD+N | 0.0007% at 1kHz - meets high-fidelity audio line-level requirements and precision sensor signal chain SNR targets. |
| Quiescent Current | 0.85mA per amplifier - allows four-channel operation under 3.5mA total, ideal for battery-powered portable instrumentation. |
| Output Swing | Within 1mV of rails (100kΩ load) - maximizes dynamic range in 3.3V or 5V single-supply systems, preserving >99.9% of available voltage headroom. |
| Input Bias Current | ±0.2pA (typ) - eliminates significant voltage error across high-impedance sources (>100MΩ), critical for photodiode and piezoelectric transducer interfaces. |
Pinout & Package
TSSOP-14 surface-mount package (Package Drawing PW), 5.0mm × 4.4mm footprint, 0.65mm pitch, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives external load or next-stage input; rail-to-rail capable with 100kΩ minimum load. |
| 2 | –In A | Inverting input of Amp A - high-impedance node (10¹³Ω || 6pF); accepts signals from –0.3V to V+ + 0.3V. |
| 3 | +In A | Non-inverting input of Amp A - identical impedance and voltage range as Pin 2; used for unity-gain buffer or non-inverting gain stages. |
| 4 | V+ | Positive power supply - accepts 2.5V to 5.5V; requires local 0.01µF ceramic bypass to ground. |
| 5 | +In B | Non-inverting input of Amp B - electrically isolated from other channels; enables independent biasing per amplifier. |
| 6 | –In B | Inverting input of Amp B - same specs as Pins 2 and 3; no crosstalk coupling to Amp A or C. |
| 7 | Out B | Amplifier B output - fully independent output stage; supports simultaneous sourcing/sinking up to ±50mA short-circuit current. |
| 8 | V– | Negative power supply / ground reference - tied to system ground in single-supply configurations; must be low-impedance. |
| 9 | Out C | Amplifier C output - identical performance to Pins 1 and 7; validated for use in 3-channel active filters or multi-sensor front-ends. |
| 10 | –In C | Inverting input of Amp C - maintains ±0.2pA bias current across temperature; usable with high-Z feedback networks. |
| 11 | +In C | Non-inverting input of Amp C - supports rail-to-rail common-mode input; enables direct connection to resistive divider references. |
| 12 | +In D | Non-inverting input of Amp D - pin-compatible with all other +In terminals; allows uniform layout for quad-channel routing. |
| 13 | –In D | Inverting input of Amp D - verified for <0.0007% THD+N when driving 600Ω loads in audio line outputs. |
| 14 | Out D | Amplifier D output - delivers full rail-to-rail swing into 10kΩ loads; tested for 1.6µs 0.01% settling time with 2V step. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 2.5V–5.5V supply range: input accepts signals from –0.3V to V+ + 0.3V; output swings to within 1mV of rails (100kΩ load). |
| Low quiescent current | 850µA per amplifier allows four-channel operation below 3.5mA - extends battery life in portable data loggers and handheld test equipment. |
| High-speed, low-distortion | 5.5MHz GBW + 6V/µs SR + 0.0007% THD+N at 1kHz ensures accurate reproduction of fast transients and high-fidelity analog waveforms. |
| Ultra-low input bias current | 0.2pA typical bias current prevents loading errors in high-impedance sensor interfaces (e.g., pH electrodes, photodiodes, piezoelectrics). |
| Independent quad architecture | Zero crosstalk (<0.2µV/V) and no inter-channel interaction - essential for simultaneous sampling of multiple sensors without calibration drift. |
Applications
| Data Acquisition Front-End | A/D Converter Driver |
|---|---|
Use Scenario: Simultaneous sampling of four analog sensor outputs (e.g., temperature, pressure, humidity, gas concentration) in an industrial IoT node. IC Role / Device Role / Timing Role: Quad OPA4343NA/250 buffers and conditions each sensor signal before multiplexing into a single SAR ADC. Use Value: Rail-to-rail swing preserves >99.9% of 3.3V ADC reference range; 850µA/channel minimizes system power budget. |
Use Scenario: Driving the input of a 12-bit ADS7816 sampling ADC in a compact PCMCIA card. IC Role / Device Role / Timing Role: Non-inverting buffer isolating ADC input capacitance and charge injection effects during sample-and-hold transitions. Use Value: 1µs 0.1% settling time ensures accurate conversion at 100kHz sampling rates; low THD+N avoids harmonic aliasing. |
| Audio Line-Level Processing | Active Filter Bank |
Use Scenario: Four-channel line-out stage in a USB audio interface, converting DAC outputs to balanced/unbalanced line drivers. IC Role / Device Role / Timing Role: Quad amplifier providing gain, DC blocking, and low-impedance drive to 600Ω professional audio loads. Use Value: Class AB output stage delivers ±50mA short-circuit current; 0.0007% THD+N meets CD-quality audio specifications. |
Use Scenario: Implementing a 4-pole bandpass filter for speech-band (160Hz–2.4kHz) signal conditioning in voice-controlled edge devices. IC Role / Device Role / Timing Role: Each amplifier configured as 1st-order stage (Sallen-Key or multiple-feedback) with precise pole placement. Use Value: 5.5MHz GBW supports filter Q-factors up to 20 without peaking; independent channels prevent frequency response coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4343EA/250 | SSOP-16 package (vs. TSSOP-14); identical electrical specs; higher thermal resistance (θJA = 100°C/W vs. 125°C/W). | Requires different land pattern and stencil; better suited for automated optical inspection due to larger pitch (0.64mm vs. 0.65mm). | Select OPA4343EA/250 when SSOP-16 footprint is already standardized in production; choose OPA4343NA/250 for tighter board area constraints. |
| TLV2464IDR | Lower GBW (6.4MHz), higher IQ (550µA/channel), wider supply range (2.7V–6V); no guaranteed rail-to-rail input beyond rails. | Acceptable for general-purpose buffering but not for ultra-low-voltage (<2.7V) or precision rail-to-rail input applications. | Use TLV2464IDR only if supply exceeds 2.7V and input common-mode range beyond rails is not required; OPA4343NA/250 remains superior for 2.5V operation and extended input range. |
Compared with OPA4343EA/250 and TLV2464IDR, the OPA4343NA/250 uniquely combines TSSOP-14 miniaturization, guaranteed 2.5V operation, and 500mV input overvoltage tolerance-making it the optimal choice for space- and voltage-constrained multi-channel signal chains.
Availability
OPA4343NA/250 is available at Aetrix Electronics and suitable for data acquisition front-ends, A/D converter driver circuits, and audio line-level processing requiring stable component supply and long-term manufacturability.
Supply support for OPA4343NA/250 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 OPA343 family-including OPA4343NA/250-is designed specifically for low-cost, miniature, single-supply applications demanding rail-to-rail performance, low power, and high speed in portable and space-constrained systems.
FAQ
What is the minimum operating supply voltage for the OPA4343NA/250?
The OPA4343NA/250 operates down to 2.5V, with full specifications guaranteed from 2.7V to 5.5V. At 2.5V, key parameters including gain-bandwidth (5.5MHz), slew rate (6V/µs), and rail-to-rail input/output swing remain functional-enabling use in ultra-low-power battery-operated systems where other quad op amps fail to start or meet AC performance targets.
Does the OPA4343NA/250 support rail-to-rail input beyond the supply rails?
Yes-the OPA4343NA/250 input common-mode voltage range extends 500mV beyond both supply rails (–0.3V to V+ + 0.3V), achieved via a complementary N-channel/P-channel input stage. This allows direct interfacing with signals that transiently exceed V+ or go below ground, provided input current is limited to ≤10mA using series resistors as specified in TI's application notes.
Can the OPA4343NA/250 drive a 600Ω load in audio applications?
Yes-the OPA4343NA/250's class AB output stage is explicitly characterized to drive 600Ω loads connected anywhere between V+ and ground. Typical THD+N remains ≤0.0007% at 1kHz with 3Vp-p output into 600Ω, meeting professional audio line-level standards without requiring external output transistors or buffers.
What is the thermal resistance (θJA) of the OPA4343NA/250 in its TSSOP-14 package?
The OPA4343NA/250 in TSSOP-14 (Package Drawing PW) has a junction-to-ambient thermal resistance (θJA) of 125°C/W, measured under JEDEC-standard conditions (1-layer board, 1in² copper pad). This value assumes proper PCB layout with thermal vias to inner ground planes; actual θJA improves to ~65°C/W with 2oz copper and 6 thermal vias per pad in production designs.
How does channel separation performance impact multi-channel OPA4343NA/250 designs?
Channel separation for the OPA4343NA/250 is specified at 0.2µV/V (–134dB) dc and >100dB at 10kHz, ensuring negligible crosstalk between amplifiers. In practice, this means a 1V signal on Channel A induces less than 0.2µV error on Channel D-critical for simultaneous-sampling systems where inter-channel interference would otherwise corrupt correlated measurements.
OPA4343NA/250 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/250 FAQ
1.How can I place an order for OPA4343NA/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4343NA/250 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/250 reliable?
The price and inventory of OPA4343NA/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4343NA/250 is usually 5 days.
3.What payment methods are accepted for OPA4343NA/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4343NA/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4343NA/250?
OPA4343NA/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4343NA/250 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/250?
For technical support, including OPA4343NA/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4343NA/250 requirements.
6.How does Aetrix verify that OPA4343NA/250 is sourced from the original manufacturer or authorized distributors?
All OPA4343NA/250 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/250 meets industry standards.
7.What is the process for return or replacement of OPA4343NA/250?
All OPA4343NA/250 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4343NA/250, 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/250 part is unused and in its original packaging.
Return procedure for OPA4343NA/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4343NA/250 Tags
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