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Texas Instruments OPA344UA/2K5
- Part No.:
- OPA344UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA344UA/2K5.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,745
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Product details
Overview
OPA344UA/2K5 from Texas Instruments is a single, rail-to-rail input/output CMOS operational amplifier optimized for low-power, single-supply precision applications. It delivers 1MHz gain-bandwidth, 0.8V/µs slew rate, ±1mV max input offset voltage, 150µA typical quiescent current, and operates from 2.7V to 5.5V - enabling high-dynamic-range signal conditioning in space-constrained data acquisition systems.
For engineers reviewing the OPA344UA/2K5 datasheet, OPA344UA/2K5 pinout, OPA344UA/2K5 application, or OPA344UA/2K5 equivalent, key selection considerations include unity-gain stability, rail-to-rail swing within 1mV of supply rails, THD+N of 0.006%, microamp-level IQ, and SOIC-8 packaging with industrial temperature range (–40°C to +85°C).
Technical Context
The OPA344UA/2K5 employs a complementary CMOS input stage enabling rail-to-rail input common-mode range extending 300mV beyond both supply rails, paired with a class AB output stage delivering rail-to-rail output swing. Its unity-gain stable architecture supports direct use in buffers, I/V converters, and ADC drivers without external compensation.
It features laser-trimmed input offset voltage (±1mV max), ultra-low input bias current (±10pA max), and high open-loop gain (104dB min) - all specified over –40°C to +85°C - making it suitable for precision analog front-ends where power, accuracy, and supply headroom are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1MHz - enables stable unity-gain operation with sufficient bandwidth for 100ksps data acquisition and audio pre-amplification. |
| Slew Rate | 0.8V/µs - supports clean 1kHz full-scale output swings up to 3Vpp without distortion in low-noise sensor interfaces. |
| Input Offset Voltage | ±1mV max - ensures ≤0.02% gain error in 50mV full-scale instrumentation amplifiers without trimming. |
| Quiescent Current | 150µA typ - allows battery-powered operation >1 year on a CR2032 cell in always-on sensor nodes. |
| THD + Noise | 0.006% at 1kHz - meets CD-quality audio line-driver requirements with minimal harmonic contamination. |
| Rail-to-Rail Output | Within 1mV of rails (RL = 100kΩ) - maximizes dynamic range in 3.3V or 5V single-supply systems driving SAR ADCs. |
| Common-Mode Range | –0.3V to (V+) + 0.3V - accepts inputs below ground or above V+ in level-shifting and transimpedance configurations. |
Pinout & Package
OPA344UA/2K5 is packaged in an 8-pin SOIC (SO-8) surface-mount package with standard D package drawing, RoHS-compliant NiPdAu lead finish, and JEDEC MSL Level-2 moisture sensitivity rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unused; must be left floating or tied to ground per layout best practice. |
| 2 (–In) | Inverting Input | Differential input node; high-impedance CMOS input (10¹³ Ω) with ±10pA bias current. |
| 3 (+In) | Non-Inverting Input | Differential input node; identical impedance and bias characteristics as Pin 2. |
| 4 (V–) | Negative Supply | Ground reference for single-supply operation; supports rail-to-rail input down to –0.3V. |
| 5 (Out) | Output | Class AB rail-to-rail output capable of sourcing/sinking ±15mA; drives 600Ω loads. |
| 6 (NC) | No Connect | Internally unused; no electrical connection; leave unconnected. |
| 7 (NC) | No Connect | Internally unused; no electrical connection; leave unconnected. |
| 8 (V+) | Positive Supply | Single-supply input range: 2.7V to 5.5V; supports operation down to 2.5V with degraded specs. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Extends 300mV beyond supply rails - enables direct interfacing with sensors whose output exceeds V+ or falls below V–. |
| Rail-to-rail output | Swings within 1mV of V+ and V– under light load - preserves >99.9% of available voltage headroom in 3.3V systems. |
| Low quiescent current | 150µA typical - reduces thermal drift and enables multi-channel designs with <1mA total analog front-end current. |
| Unity-gain stable | No external compensation required - simplifies PCB layout and eliminates risk of oscillation in buffer or gain-of-one configurations. |
| High CMRR | 76dB min (–40°C to +85°C) - rejects common-mode noise in noisy industrial environments with unshielded sensor wiring. |
Applications
| PCMCIA Data Acquisition | Audio Line Driver |
|---|---|
Use Scenario: Signal conditioning for 12-bit sampling ADCs in portable PCMCIA cards with tight board area and battery life constraints. IC Role / Device Role / Timing Role: Buffer and gain-stage preceding ADS7822 ADC; provides charge injection immunity and rail-to-rail swing into 10kΩ input. Use Value: Enables 500µA total system quiescent current while maintaining 0.006% THD+N and 12-bit effective resolution. | Use Scenario: Low-distortion line-level output driver for portable audio codecs operating from 3.3V supplies. IC Role / Device Role / Timing Role: Unity-gain buffer isolating DAC output from variable cable capacitance and headphone load variations. Use Value: Delivers 3Vpp output with <0.01% THD+N at 1kHz and maintains stability driving 100pF + 10kΩ loads without series resistance. |
| Process Control Sensor Interface | Active Filter for Industrial Monitoring |
Use Scenario: Amplifying low-level thermocouple or RTD signals in factory-floor PLC analog input modules. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with programmable gain; referenced to local ground in isolated 24V systems. Use Value: ±1mV offset and ±3µV/°C drift ensure <0.1°C measurement uncertainty over –40°C to +85°C ambient. | Use Scenario: 2nd-order Sallen-Key low-pass filter suppressing EMI in vibration monitoring sensors. IC Role / Device Role / Timing Role: Active filter op amp configured for G = 2, fc = 1kHz; requires unity-gain stability and low noise density. Use Value: 30nV/√Hz input voltage noise and 1MHz GBW support sharp roll-off with minimal passband ripple and group delay variation. |
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 | SOT23-5 package (5-pin), same electrical specs, lower thermal resistance (200°C/W vs 150°C/W), but no NC pins. | Better suited for ultra-compact layouts; lacks NC pins for routing flexibility; not pin-compatible with SOIC-8 footprint. | Select when board space is critical and thermal performance is secondary to size. |
| MCP6001T-I/OT | Microchip's 1MHz rail-to-rail op amp; higher max IQ (100µA vs 250µA), wider supply range (1.8V–6.0V), but ±3mV offset and 1.2V/µs slew rate. | Acceptable for cost-sensitive consumer applications; less precise for <0.1% accuracy requirements. | Choose for 1.8V operation or tighter BOM consolidation where ±3mV offset is acceptable. |
Compared with OPA344NA/250, OPA344UA/2K5 offers superior routing flexibility via NC pins and better thermal management in SOIC-8; compared with MCP6001T-I/OT, it delivers tighter offset, lower THD+N, and proven performance in TI's industrial reference designs - critical for precision data acquisition.
Availability
OPA344UA/2K5 is available at Aetrix Electronics and suitable for PCMCIA data acquisition, audio line driving, process control sensor interfaces, and active filter design requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for OPA344UA/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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 50 years of innovation in precision amplifiers and data converters.
The OPA344 series belongs to TI's MicroAmplifier™ portfolio, designed specifically for low-power, miniature, single-supply precision signal conditioning in portable instrumentation, industrial sensing, and audio applications.
FAQ
What is the maximum operating supply voltage for OPA344UA/2K5?
The absolute maximum supply voltage for OPA344UA/2K5 is 7.5V between V+ and V–. However, the device is fully specified and guaranteed over 2.7V to 5.5V. Operation at 6V or higher may degrade parameters like PSRR and CMRR, and is not recommended for production designs without validation. Always observe the 0.5V input voltage limit beyond rails to avoid latch-up.
Is OPA344UA/2K5 unity-gain stable?
Yes, OPA344UA/2K5 is explicitly unity-gain stable as confirmed in the official datasheet (SBOS107A). It requires no external compensation components in G = 1 configurations such as voltage followers or non-inverting buffers - a key differentiator from the OPA345 series, which is optimized for G ≥ 5.
What does the "/2K5" suffix mean in OPA344UA/2K5?
The "/2K5" suffix indicates the ordering format: 2500 units per tape-and-reel. This is a standard TI packaging designation meaning one reel contains exactly 2500 OPA344UA/2K5 devices in SOIC-8 packaging, with RoHS-compliant NiPdAu lead finish and MSL Level-2 moisture sensitivity rating.
Can OPA344UA/2K5 drive capacitive loads directly?
OPA344UA/2K5 can directly drive up to 250pF capacitive loads in unity-gain configuration without instability. For loads exceeding 250pF or in configurations with parallel resistive loads, a small series resistor (10Ω–20Ω) between output and load is recommended to suppress ringing while preserving DC accuracy - as documented in Figure 5 of SBOS107A.
What is the thermal resistance (θJA) of OPA344UA/2K5 in its SOIC-8 package?
The junction-to-ambient thermal resistance (θJA) for OPA344UA/2K5 in the SOIC-8 (D) package is 150°C/W, as specified in the Thermal Resistance table of SBOS107A. This value assumes standard JEDEC 2-layer board conditions (1 inch² copper pad); actual board layout significantly impacts real-world thermal performance.
OPA344UA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 8-SOIC
OPA344UA/2K5 FAQ
1.How can I place an order for OPA344UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA344UA/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 OPA344UA/2K5 reliable?
The price and inventory of OPA344UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA344UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA344UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA344UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA344UA/2K5?
OPA344UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA344UA/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 OPA344UA/2K5?
For technical support, including OPA344UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA344UA/2K5 requirements.
6.How does Aetrix verify that OPA344UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA344UA/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 OPA344UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA344UA/2K5?
All OPA344UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA344UA/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 OPA344UA/2K5 part is unused and in its original packaging.
Return procedure for OPA344UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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