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Texas Instruments OPA343NA/250G4
- Part No.:
- OPA343NA/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA343NA/250G4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,798
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Product details
Overview
OPA343NA/250G4 from Texas Instruments is a single-channel, 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 quiescent current per channel, with output swing within 1mV of rails under 100kΩ load - ideal for driving sampling A/D converters in space-constrained, battery-powered systems.
For engineers reviewing the OPA343NA/250G4 datasheet, OPA343NA/250G4 pinout, OPA343NA/250G4 application, or OPA343NA/250G4 equivalent, key selection criteria include rail-to-rail I/O performance at 2.5V supply, THD+N of 0.0007% at 1kHz, input bias current ≤10pA, and SOT-23-5 package compatibility with high-density PCB layouts.
Technical Context
The OPA343NA/250G4 employs a complementary N/P-channel input stage enabling rail-to-rail common-mode input range extending 500mV beyond supply rails, and a class AB output stage delivering true rail-to-rail output swing. Its unity-gain stable architecture supports direct connection to ADC inputs without external compensation.
Designed on a 0.6µm CMOS process, it maintains stable ac performance across –40°C to +85°C, with open-loop gain ≥100dB (RL = 100kΩ), CMRR ≥74dB over full common-mode range, and channel separation >100dB at 1kHz - critical for precision signal conditioning in mixed-signal systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5.5MHz - supports stable closed-loop operation up to 100kHz with adequate phase margin for anti-aliasing filter interfaces. |
| Slew Rate | 6V/µs - enables clean 2V-step settling in 1µs (0.1%), suitable for driving medium-speed SAR ADCs like ADS7816. |
| Input Offset Voltage | ±2mV (max) - ensures <0.1% gain error in 12-bit data acquisition paths with 5V full-scale range. |
| Quiescent Current | 0.85mA per amplifier - enables micro-power system design with <1mW dissipation at 2.7V supply. |
| THD+N | 0.0007% at 1kHz - meets audio-grade linearity requirements for pre-amplifier and active filter stages. |
| Input Bias Current | ±0.2pA (typ) - minimizes voltage error in high-impedance sensor interfaces (e.g., photodiode transimpedance). |
| Output Swing | Within 1mV of rails (100kΩ load) - maximizes dynamic range in low-voltage systems, e.g., 3.3V or 2.7V logic-compatible signal chains. |
Pinout & Package
SOT-23-5 surface-mount package (DBV drawing), 5-pin, moisture sensitivity level (MSL) Level-1, RoHS-compliant, with thermal resistance θJA = 200°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; requires 0.01µF bypass capacitor on V+ for stability. |
| 2 (–IN) | Inverting input | Differential node accepting signals down to –0.3V and up to (V+) + 0.3V; clamped by internal diodes. |
| 3 (+IN) | Non-inverting input | High-impedance node (1013Ω || 3pF); enables precision buffer or instrumentation configurations. |
| 4 (V–) | Negative supply / ground reference | Typically connected to system ground in single-supply operation; defines lower rail for rail-to-rail swing. |
| 5 (V+) | Positive supply | Accepts 2.5V to 5.5V; bypassing with 0.01µF ceramic capacitor is mandatory for noise immunity and stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Extends usable input common-mode range 500mV beyond rails and output swing to within 1mV of rails - preserves full signal headroom in 2.5V–3.3V systems. |
| Low quiescent current | 850µA per amplifier at 5V - enables always-on sensor front-ends and portable medical devices with multi-day battery life. |
| High-speed, low-noise operation | 5.5MHz GBW + 25nV/√Hz input voltage noise - supports wideband active filters and anti-aliasing stages without SNR degradation. |
| Ultra-low input bias current | 0.2pA typical - eliminates significant offset drift in high-Z pH sensors, piezoelectric transducers, or electrophysiology amplifiers. |
| Unity-gain stable | No external compensation required - simplifies layout for non-inverting buffers driving capacitive ADC inputs (e.g., ADS7816). |
Applications
| Driving Sampling A/D Converters | PCMCIA Card Signal Conditioning |
|---|---|
Use Scenario: Buffering analog sensor outputs before sampling by 12-bit SAR ADCs (e.g., ADS7816) in handheld test equipment. IC Role / Device Role / Timing Role: Precision voltage follower with rail-to-rail swing, minimizing charge injection errors and settling within 1µs. Use Value: Enables full-scale utilization of 5V ADC input range while maintaining <0.001% linearity error due to ±2mV offset and 0.0007% THD+N. |
Use Scenario: Signal amplification and level-shifting for analog I/O on PCMCIA cards operating from 3.3V supplies. IC Role / Device Role / Timing Role: Single-supply op amp providing gain and DC offset correction prior to card-edge connector interface. Use Value: SOT-23-5 footprint saves board space; 2.5V minimum supply allows direct use with PCMCIA 3.3V VCC without LDO. |
| Audio Line-Level Pre-amplification | Portable Data Acquisition Front-End |
Use Scenario: Low-noise microphone pre-amplifier stage in battery-powered voice recorders. IC Role / Device Role / Timing Role: Inverting gain stage with 25nV/√Hz noise density and 0.0007% THD+N at 1kHz. Use Value: Delivers CD-quality audio fidelity (96dB SNR) while consuming only 2.8mW from 3.3V supply. |
Use Scenario: High-impedance sensor interface (e.g., thermistor, strain gauge) in field-deployable environmental monitors. IC Role / Device Role / Timing Role: Precision buffer isolating sensor bridge from ADC input, rejecting common-mode noise. Use Value: 1013Ω input impedance prevents loading of high-Z sensors; 74dB CMRR suppresses 50/60Hz interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA340UA/2K5 | Lower offset (±125µV max), higher GBW (8MHz), but higher IQ (1.3mA) and SO-8 only. | Better for high-accuracy 16-bit DAQ; less suitable for ultra-low-power or space-constrained designs. | Choose OPA340UA/2K5 when offset drift and bandwidth outweigh size and quiescent power constraints. |
| MCP6001T-E/OT | Lower IQ (100µA), same SOT-23-5, but reduced GBW (1MHz) and higher THD+N (0.01%). | Targeted at cost-sensitive, low-frequency sensor buffering where speed and distortion are secondary. | Choose MCP6001T-E/OT only for sub-100kHz applications where 5.5MHz bandwidth and 0.0007% THD+N are unnecessary. |
Compared with OPA343NA/250G4, OPA340UA/2K5 offers superior dc precision and speed at the expense of 54% higher quiescent power and larger SO-8 packaging, while MCP6001T-E/OT trades bandwidth and linearity for ultra-low power - making OPA343NA/250G4 the optimal balance for 100kHz-capable, rail-to-rail, space-constrained signal chains.
Availability
OPA343NA/250G4 is available at Aetrix Electronics and suitable for data acquisition, portable instrumentation, and audio signal conditioning requiring stable component supply, consistent parametric performance, and long-term manufacturability assurance.
Supply support for OPA343NA/250G4 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 series belongs to TI's microAmplifier™ portfolio, designed specifically for miniature, low-voltage, rail-to-rail applications including portable medical devices, battery-powered test gear, and space-constrained industrial sensors.
FAQ
What is the absolute maximum supply voltage for OPA343NA/250G4?
The absolute maximum supply voltage for OPA343NA/250G4 is 7.5V, though the specified operating range is 2.5V to 5.5V. Exceeding 7.5V risks permanent damage. The device is characterized and guaranteed for performance between 2.7V and 5.0V, with parameters remaining functional across the full 2.5V–5.5V range - a key differentiator of the OPA343 series.
Does OPA343NA/250G4 support rail-to-rail input with a 2.7V supply?
Yes, OPA343NA/250G4 supports rail-to-rail input with a 2.7V supply: its input common-mode voltage range extends from –0.3V to (V+) + 0.3V, meaning it accepts signals from –0.3V to +3.0V. This capability is confirmed in the SBOS090A datasheet under "INPUT VOLTAGE RANGE" and enables full utilization of low-voltage sensor outputs without level-shifting circuitry.
Can OPA343NA/250G4 drive a 600Ω load effectively?
Yes, OPA343NA/250G4 can drive a 600Ω load: its class AB output stage is explicitly rated for 600Ω loads connected anywhere between V+ and ground. Typical output swing remains within ~40mV of rails at ±20mA output current, and short-circuit current is ±50mA - ensuring robust performance in audio line-driver and instrumentation amplifier output stages.
What is the thermal resistance (θJA) of the OPA343NA/250G4 package?
The OPA343NA/250G4 uses the SOT-23-5 (DBV) package with a junction-to-ambient thermal resistance (θJA) of 200°C/W, as specified in the SBOS090A datasheet. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves with added copper pour or thermal vias beneath the exposed pad (if present) - though the DBV variant has no thermal pad.
Is OPA343NA/250G4 unity-gain stable, and what compensation is required?
Yes, OPA343NA/250G4 is unity-gain stable and requires no external compensation components. Its internal compensation ensures stability in gain-of-1 configurations, including voltage followers driving capacitive loads up to 1000pF. For improved ringing with large capacitive loads (>100pF), a 10Ω–20Ω series resistor at the output is recommended - as documented in the SBOS090A Applications Information section.
OPA343NA/250G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- 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
- 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:
- SOT-23-5
OPA343NA/250G4 FAQ
1.How can I place an order for OPA343NA/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA343NA/250G4 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 OPA343NA/250G4 reliable?
The price and inventory of OPA343NA/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA343NA/250G4 is usually 5 days.
3.What payment methods are accepted for OPA343NA/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA343NA/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA343NA/250G4?
OPA343NA/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA343NA/250G4 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 OPA343NA/250G4?
For technical support, including OPA343NA/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA343NA/250G4 requirements.
6.How does Aetrix verify that OPA343NA/250G4 is sourced from the original manufacturer or authorized distributors?
All OPA343NA/250G4 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 OPA343NA/250G4 meets industry standards.
7.What is the process for return or replacement of OPA343NA/250G4?
All OPA343NA/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA343NA/250G4, 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 OPA343NA/250G4 part is unused and in its original packaging.
Return procedure for OPA343NA/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA343NA/250G4 Tags
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LM358DT
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LM358DR
Texas Instruments
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