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Texas Instruments OPA344NA/250G4
- Part No.:
- OPA344NA/250G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA344NA/250G4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,485
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Product details
Overview
OPA344NA/250G4 from Texas Instruments is a single, rail-to-rail input/output CMOS operational amplifier optimized for precision low-power, single-supply operation (2.7V–5.5V). It delivers 1MHz gain-bandwidth, 0.8V/µs slew rate, ±1mV max input offset voltage, 150µA typical quiescent current, and output swing within 1mV of rails under light load - ideal for driving sampling ADCs in portable data acquisition systems.
For engineers reviewing the OPA344NA/250G4 datasheet, OPA344NA/250G4 pinout, OPA344NA/250G4 application, or OPA344NA/250G4 equivalent, key selection criteria include unity-gain stability, rail-to-rail I/O performance at 2.7V supply, THD+N of 0.006%, and SOT23-5 package suitability for space-constrained PCB layouts.
Technical Context
The OPA344NA/250G4 employs a complementary differential input stage enabling rail-to-rail common-mode input range extending 300mV beyond both supply rails. Its class AB output stage achieves 1mV rail-to-rail swing into 100kΩ loads while maintaining ≥96dB open-loop gain.
Designed for unity-gain stability, it operates across –40°C to +85°C with input bias current ≤10pA, CMRR ≥76dB over full common-mode range, and PSRR ≥30µV/V - supporting high-accuracy signal conditioning in low-voltage embedded sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1MHz - supports stable unity-gain buffering of signals up to ~100kHz with minimal phase lag. |
| Slew Rate | 0.8V/µs - enables clean 100kHz, 1Vpp output without slewing distortion in audio and sensor front-ends. |
| Input Offset Voltage | ±1mV max - ensures ≤1mV dc error in precision I/V conversion and low-level signal amplification. |
| Quiescent Current | 150µA typ - allows battery-powered operation >1 year on a CR2032 cell in always-on monitoring nodes. |
| Output Swing | Within 1mV of rails (RL = 100kΩ) - maximizes dynamic range in 3.3V or 5V single-supply systems. |
| THD + Noise | 0.006% at 1kHz - meets fidelity requirements for speech-band audio and high-resolution sensor digitization. |
| Common-Mode Range | –0.3V to (V+) + 0.3V - accepts inputs below ground or above V+ in level-shifting and bipolar-signal conditioning. |
Pinout & Package
SOT23-5 surface-mount package (DBV drawing), 5-pin, 2.9mm × 1.6mm footprint, 200°C/W thermal resistance, RoHS-compliant, NIPDAU lead finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; requires 0.01µF bypass capacitor near V+ for stability. |
| 2 (–IN) | Inverting input | Differential node accepting feedback or signal; high-impedance (10¹³Ω || 6pF) minimizes loading. |
| 3 (+IN) | Non-inverting input | High-impedance input node; common-mode range extends 300mV beyond supplies. |
| 4 (V–) | Negative supply | Ground reference in single-supply use; must be bypassed with 0.01µF ceramic capacitor. |
| 5 (V+) | Positive supply | Accepts 2.7V–5.5V; internal ESD protection clamps inputs to rails ±0.5V. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Enables direct interfacing with sensors or DAC outputs spanning full supply range without level-shifting. |
| Rail-to-rail output | Preserves >99.9% of available voltage headroom in 3.3V systems, critical for maximizing ADC effective resolution. |
| Unity-gain stable | Eliminates need for external compensation in buffer, follower, or gain-of-one configurations - reduces BOM count. |
| Low 150µA quiescent current | Supports continuous operation in energy-harvesting or coin-cell-powered IoT endpoints without compromising bandwidth. |
| 1mV output swing from rail | Ensures full-scale signal delivery to SAR ADC references (e.g., ADS7822), minimizing code loss at extremes. |
Applications
| PCMCIA Card Signal Conditioning | Data Acquisition Front-End |
|---|---|
Use Scenario: Amplifying low-level transducer outputs (e.g., thermocouple, strain gauge) in portable PCMCIA-based measurement cards. IC Role / Device Role / Timing Role: Precision unity-gain buffer and level shifter, rejecting supply noise while preserving microvolt-level signal integrity. Use Value: Rail-to-rail I/O enables full utilization of 3.3V ADC input range; 0.006% THD+N maintains 12-bit+ ENOB in 10ksps sampling. | Use Scenario: Driving the input of medium-speed SAR ADCs (e.g., ADS7822) in handheld test equipment. IC Role / Device Role / Timing Role: Charge-injection compensator and drive amplifier, settling to 0.1% in 5µs after 2V step. Use Value: 1mV rail-to-rail swing ensures no code truncation; 150µA IQ extends battery life in field-deployable loggers. |
| Audio Processing Channel | Process Control Loop Sensor Interface |
Use Scenario: Low-noise preamplification and filtering of electret microphone signals in voice-enabled edge devices. IC Role / Device Role / Timing Role: High-input-impedance (10¹³Ω) non-inverting amplifier with bandpass filtering (300Hz–3kHz). Use Value: 30nV/√Hz input voltage noise preserves SNR; rail-to-rail output drives ADC without clipping speech peaks. | Use Scenario: Converting 4–20mA loop current to voltage and scaling for PLC analog inputs in industrial controllers. IC Role / Device Role / Timing Role: Precision I/V converter with programmable gain, operating from 24V-derived 3.3V rail. Use Value: ±1mV offset ensures <0.05% FSR error in 16-bit control systems; 76dB CMRR rejects common-mode noise on long sensor cables. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA344NA/250 | Identical electrical specs and SOT23-5 package; differs only in tape-and-reel packaging quantity (250 vs. 250G4's green-RoHS variant). | No functional difference; same use cases and layout compatibility. | Select OPA344NA/250G4 when RoHS-compliant, halogen-free assembly is required per IPC-1752A. |
| MCP6001T-E/OT | Lower GBW (1MHz same), higher IQ (100µA vs. 150µA typ), but wider supply range (1.8V–6.0V); offset voltage ±1.5mV max. | Better suited for sub-2.7V battery operation; less optimal for precision <1mV offset-critical designs. | Choose MCP6001T-E/OT for ultra-low-voltage (1.8V) systems where 0.5mV higher offset is acceptable. |
Compared with OPA344NA/250G4, the identical OPA344NA/250 offers identical performance in non-green packaging, while the MCP6001T-E/OT trades offset precision and rail-to-rail output fidelity for broader supply flexibility and marginally lower power - making it suitable only where 1.8V operation or halogen-free compliance is secondary to cost or voltage range.
Availability
OPA344NA/250G4 is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and space-constrained industrial sensor modules requiring stable component supply across extended temperature ranges.
Supply support for OPA344NA/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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The OPA344NA/250G4 belongs to TI's MicroAmplifier™ series, designed specifically for low-power, miniature, single-supply applications demanding rail-to-rail performance and high dc precision in portable and industrial sensing systems.
FAQ
What is the operating supply voltage range for the OPA344NA/250G4?
The OPA344NA/250G4 operates from 2.7V to 5.5V (specified range), with functional capability down to 2.5V. This makes it compatible with standard 3.3V and 5V logic rails, and suitable for battery-powered systems using two alkaline cells (3.2V fresh) or Li-ion (3.6V nominal). The device maintains rail-to-rail input/output performance across this full range.
Is the OPA344NA/250G4 unity-gain stable?
Yes, the OPA344NA/250G4 is explicitly unity-gain stable, as confirmed in the official TI SBOS107A datasheet. It does not require external compensation for stable operation in gain-of-one configurations such as voltage followers or non-inverting buffers - a key differentiator from the higher-speed OPA345 family, which requires G ≥ 5.
What is the maximum output voltage swing of the OPA344NA/250G4?
The OPA344NA/250G4 delivers rail-to-rail output swing: within 1mV of either supply rail into a 100kΩ load, and within 40mV into a 5kΩ load. This performance is guaranteed over the full –40°C to +85°C temperature range and enables full utilization of ADC input ranges in low-voltage systems without signal clipping.
Does the OPA344NA/250G4 support rail-to-rail input?
Yes, the OPA344NA/250G4 features true rail-to-rail input with a common-mode voltage range from –0.3V to (V+) + 0.3V. This allows input signals to extend 300mV beyond both supply rails - essential for interfacing with sensors or DACs that output beyond the supply boundaries, and for level-shifting applications in single-supply systems.
What package type and marking does the OPA344NA/250G4 use?
The OPA344NA/250G4 uses the SOT23-5 (DBV) package, with device marking "B44" laser-etched on the top surface. It is supplied in green (RoHS & no Sb/Br), halogen-free tape-and-reel format containing 250 units, with NIPDAU lead finish and JEDEC MSL Level-2 rating (260°C, 1 year floor life).
OPA344NA/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:
- 0.8V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 150µA
- Current - Output / Channel:
- 15 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
OPA344NA/250G4 FAQ
1.How can I place an order for OPA344NA/250G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA344NA/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 OPA344NA/250G4 reliable?
The price and inventory of OPA344NA/250G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA344NA/250G4 is usually 5 days.
3.What payment methods are accepted for OPA344NA/250G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA344NA/250G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA344NA/250G4?
OPA344NA/250G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA344NA/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 OPA344NA/250G4?
For technical support, including OPA344NA/250G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA344NA/250G4 requirements.
6.How does Aetrix verify that OPA344NA/250G4 is sourced from the original manufacturer or authorized distributors?
All OPA344NA/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 OPA344NA/250G4 meets industry standards.
7.What is the process for return or replacement of OPA344NA/250G4?
All OPA344NA/250G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA344NA/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 OPA344NA/250G4 part is unused and in its original packaging.
Return procedure for OPA344NA/250G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA344NA/250G4 Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
Texas Instruments
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LM358ADR
Texas Instruments
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LM2904DGKR
Texas Instruments
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LM324DR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
Microchip Technology
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LM324PWR
Texas Instruments
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LM2902PWR
Texas Instruments
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LM2902DR
Texas Instruments
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LM358P
Texas Instruments
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