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Texas Instruments OPA4344EA/2K5
- Part No.:
- OPA4344EA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4344EA/2K5.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,698
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Product details
Overview
OPA4344EA/2K5 from Texas Instruments is a quad, rail-to-rail input/output CMOS operational amplifier optimized for precision, low-power, single-supply operation (2.7V to 5.5V). It delivers 1MHz gain-bandwidth, 0.8V/µs slew rate, ±1mV max input offset voltage, 0.006% THD+N at 1kHz, and 150µA typical quiescent current per amplifier-enabling high-fidelity signal conditioning in space-constrained, battery-powered data acquisition systems.
For engineers reviewing the OPA4344EA/2K5 datasheet, OPA4344EA/2K5 pinout, OPA4344EA/2K5 application, or OPA4344EA/2K5 equivalent, key selection criteria include rail-to-rail I/O swing within 1mV of rails, unity-gain stability, low-noise (30nV/√Hz), and TSSOP-14 package compatibility with high-density PCB layouts.
Technical Context
The OPA4344EA/2K5 implements a complementary CMOS input stage enabling rail-to-rail common-mode input range extending 300mV beyond supply rails, paired with a class AB output stage delivering rail-to-rail output swing down to 1mV from V+ or V– under light loads. Its unity-gain stable architecture supports direct use in buffers, active filters, and ADC driver configurations without external compensation.
Each of the four amplifiers operates independently with matched specifications across temperature (–40°C to +85°C), including 122dB open-loop gain, 92dB CMRR at 5.5V, and 130dB PSRR at 1kHz-ensuring consistent channel separation and minimal crosstalk in multi-channel signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1MHz - enables stable unity-gain operation with sufficient bandwidth for audio and sensor signal conditioning up to ~100kHz closed-loop. |
| Slew Rate | 0.8V/µs - supports clean 10kHz full-scale sine wave output at 5Vpp without distortion in single-supply systems. |
| Input Offset Voltage | ±1mV max - ensures ≤0.02% gain error in 50mV–5V sensor interface applications without trimming. |
| Quiescent Current | 150µA per amplifier typ - allows four-channel operation at <600µA total, critical for coin-cell or energy-harvesting systems. |
| THD + Noise | 0.006% at 1kHz - meets high-fidelity audio and precision measurement requirements where harmonic artifacts must be suppressed below –84dBc. |
| Rail-to-Rail Output Swing | Within 1mV of rails (RL ≥100kΩ) - maximizes dynamic range in 3.3V or 5V systems, preserving >99.9% of available signal headroom. |
| Input Voltage Range | –0.3V to (V+) + 0.3V - permits direct interfacing with sensors or DACs operating slightly outside supply rails without external clamping. |
Pinout & Package
TSSOP-14 surface-mount package (Package Drawing PW), 5.0mm × 4.4mm footprint, 0.65mm pitch, moisture sensitivity level (MSL) 1 - suitable for automated assembly and high-reliability industrial environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out D | Output of fourth amplifier; drives sampling ADC inputs or low-impedance loads up to ±15mA. |
| 2 | –In D | Inverting input of fourth amplifier; accepts differential or single-ended signals with rail-to-rail common-mode range. |
| 3 | +In D | Non-inverting input of fourth amplifier; used for unity-gain buffers or high-impedance sensor interfaces. |
| 4 | –V | Ground reference (V–) for all four amplifiers; requires local 0.01µF ceramic bypass to minimize noise coupling. |
| 5 | +In C | Non-inverting input of third amplifier; electrically isolated from other channels to prevent crosstalk in multi-channel filtering. |
| 6 | –In C | Inverting input of third amplifier; supports active filter topologies requiring precise feedback ratio matching. |
| 7 | Out C | Output of third amplifier; shares same drive capability and rail-to-rail swing as Out D. |
| 8 | Out A | Output of first amplifier; commonly used for primary signal path buffering prior to ADC sampling. |
| 9 | –In A | Inverting input of first amplifier; configured for transimpedance or differential gain stages in data acquisition front-ends. |
| 10 | +In A | Non-inverting input of first amplifier; referenced to stable bias point for DC-coupled sensor signal conditioning. |
| 11 | +V | Positive supply (2.7V–5.5V); powers all four amplifiers; requires dedicated 0.01µF ceramic decoupling adjacent to pin. |
| 12 | +In B | Non-inverting input of second amplifier; enables independent channel processing in multi-sensor systems. |
| 13 | –In B | Inverting input of second amplifier; supports matched gain-setting resistors for calibrated differential outputs. |
| 14 | Out B | Output of second amplifier; provides redundant or auxiliary signal path with identical AC/DC performance to Out A. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 2.7V–5.5V supply range: input accepts signals from –0.3V to V+ + 0.3V; output swings to within 1mV of either rail under light loads. |
| Low quiescent current | 150µA per amplifier (typ) allows four-channel operation at <600µA total-ideal for portable instrumentation and battery-powered IoT nodes. |
| Unity-gain stability | Guaranteed stable at G = 1 without external compensation, simplifying design of buffers, active filters, and I/V converters in compact layouts. |
| Low THD + noise | 0.006% at 1kHz ensures minimal harmonic distortion in audio line drivers and high-SNR sensor signal chains where fidelity is critical. |
| High channel separation | 130dB dc channel separation prevents crosstalk between amplifiers in multi-channel data acquisition systems using shared supply/ground planes. |
Applications
| PCMCIA Data Acquisition Card | Industrial Process Control Sensor Interface |
|---|---|
|
Use Scenario: Signal conditioning for 12-bit SAR ADCs in portable PCMCIA cards with tight power and board area constraints. IC Role / Device Role / Timing Role: Quad OPA4344EA/2K5 buffers and filters analog sensor outputs (temperature, pressure) before sampling, providing rail-to-rail swing and low noise. Use Value: Enables full 0–5V ADC input range utilization with <600µA total quiescent current, extending battery life while maintaining 12-bit effective resolution. |
Use Scenario: Multi-channel 4–20mA loop receiver with isolated voltage output in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: One amplifier converts current to voltage; others condition and buffer outputs for multiple downstream control loops. Use Value: Rail-to-rail I/O and ±1mV offset ensure accurate 4–20mA translation across –40°C to +85°C industrial temperature range without calibration drift. |
| Audio Processing Front-End | Active Filter Bank for Communications |
|
Use Scenario: Low-noise preamplifier and tone control stage in battery-powered voice recorders or hearing aid evaluation kits. IC Role / Device Role / Timing Role: Two amplifiers implement microphone bias and gain; remaining two provide bass/treble equalization via Sallen-Key topology. Use Value: 30nV/√Hz input voltage noise and 0.006% THD+N preserve speech intelligibility and SNR >95dB in 3.3V systems. |
Use Scenario: Channel-select filtering in narrowband wireless transceivers (e.g., ISM band sub-GHz radios) requiring matched multi-pole responses. IC Role / Device Role / Timing Role: Each amplifier implements one pole of a 4th-order elliptic or Chebyshev filter; quad configuration ensures component matching and thermal tracking. Use Value: Unity-gain stability and 1MHz GBW support precise 10–100kHz bandpass filter design with <0.1dB passband ripple and steep stopband rejection. |
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 |
|---|---|---|---|
| OPA4344UA/2K5 | SO-14 package (larger footprint, 8.65mm × 3.91mm vs TSSOP-14's 5.0mm × 4.4mm); identical electrical specs and temperature range. | Better thermal dissipation (θJA = 100°C/W vs 100°C/W for TSSOP-14) but requires more PCB area; compatible with legacy SOIC footprints. | Select OPA4344UA/2K5 when board layout prioritizes ease of rework or thermal margin over miniaturization. |
| TLV2464IDR | Higher quiescent current (550µA per amp), lower GBW (6.4MHz), no guaranteed rail-to-rail output swing below 10mV; specified only to 125°C. | Not suitable for ultra-low-power designs or applications requiring <1mV output swing; better for higher-speed, non-battery-critical systems. | Choose TLV2464IDR only if higher bandwidth is required and power budget exceeds 2.2mA total for four channels. |
Compared with OPA4344UA/2K5, the OPA4344EA/2K5 saves >50% PCB area while maintaining identical precision and low-power performance; versus TLV2464IDR, it reduces total quiescent current by 73% and guarantees sub-millivolt rail-to-rail output-critical for 3.3V data acquisition.
Availability
OPA4344EA/2K5 is available at Aetrix Electronics and suitable for PCMCIA data acquisition cards, industrial process control sensor interfaces, and audio processing front-ends requiring stable component supply with RoHS-compliant, green packaging and MSL-1 handling.
Supply support for OPA4344EA/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 low-power signal chain solutions.
The OPA344/4344 family was designed specifically for miniature, single-supply, rail-to-rail applications in portable instrumentation, data acquisition, and audio systems-emphasizing low IQ, high accuracy, and robust operation from 2.7V to 5.5V.
FAQ
What is the maximum operating supply voltage for the OPA4344EA/2K5?
The OPA4344EA/2K5 has an absolute maximum supply voltage of 7.5V between V+ and V–, but its specified operating range is 2.7V to 5.5V. Operation outside this range may cause parametric degradation or reliability issues. For reliable long-term performance, maintain VS within 2.7V–5.5V as validated in the SBOS107A datasheet.
Is the OPA4344EA/2K5 unity-gain stable?
Yes, the OPA4344EA/2K5 is explicitly unity-gain stable, as confirmed in the Applications Information section of the SBOS107A datasheet. It requires no external compensation and maintains phase margin >45° at G = 1, making it suitable for buffer, active filter, and I/V converter configurations without risk of oscillation.
What is the thermal resistance (θJA) of the OPA4344EA/2K5 in its TSSOP-14 package?
The OPA4344EA/2K5 in the TSSOP-14 (PW) package has a junction-to-ambient thermal resistance (θJA) of 100°C/W, as specified in the Thermal Resistance table on page 3 of SBOS107A. This value assumes standard JEDEC 2-layer board conditions and enables continuous operation at up to +85°C ambient with appropriate PCB copper pour.
Does the OPA4344EA/2K5 support rail-to-rail output swing under load?
Yes-the OPA4344EA/2K5 delivers rail-to-rail output swing within 1mV of V+ or V– when driving RL ≥100kΩ, and within 400mV under 5kΩ loads while maintaining ≥96dB open-loop gain. This behavior is verified in the Output Voltage Swing specification table (page 2) and "Output Voltage Swing vs Output Current" curve (page 7).
Can the OPA4344EA/2K5 drive capacitive loads directly?
The OPA4344EA/2K5 can directly drive up to 250pF capacitive loads in unity-gain configuration without instability, as stated in the Capacitive Load and Stability section (page 10). For larger loads or improved phase margin, a 10Ω–20Ω series resistor at the output (Figure 5) is recommended to suppress ringing while preserving DC accuracy.
OPA4344EA/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:
- 0.8V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 150µA (x4 Channels)
- 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:
- 14-TSSOP
OPA4344EA/2K5 FAQ
1.How can I place an order for OPA4344EA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4344EA/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 OPA4344EA/2K5 reliable?
The price and inventory of OPA4344EA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4344EA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA4344EA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4344EA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4344EA/2K5?
OPA4344EA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4344EA/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 OPA4344EA/2K5?
For technical support, including OPA4344EA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4344EA/2K5 requirements.
6.How does Aetrix verify that OPA4344EA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA4344EA/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 OPA4344EA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA4344EA/2K5?
All OPA4344EA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4344EA/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 OPA4344EA/2K5 part is unused and in its original packaging.
Return procedure for OPA4344EA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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