My Inquiry
My Account
Texas Instruments OPA2344UA/2K5
- Part No.:
- OPA2344UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2344UA/2K5.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,391
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA2344UA/2K5 from Texas Instruments is a dual, 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 and audio systems.
For engineers reviewing the OPA2344UA/2K5 datasheet, OPA2344UA/2K5 pinout, OPA2344UA/2K5 application, or OPA2344UA/2K5 equivalent, key selection criteria include unity-gain stability, rail-to-rail swing within 1mV of supply rails, microamp-level quiescent current, SOIC-8 packaging, and verified performance across –40°C to +85°C for embedded sensor interfaces and portable instrumentation.
Technical Context
The OPA2344UA/2K5 implements a complementary CMOS input stage enabling rail-to-rail common-mode input range extending 300mV beyond both supply rails, with a 400mV transition region where both N- and P-channel pairs operate. 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 supports single-supply operation from 2.7V to 5.5V and exhibits 76–92dB CMRR over its full common-mode range. Input bias current remains ultra-low (±10pA max), and voltage noise is 30nV/√Hz at 10kHz - critical for high-impedance sensor front-ends and precision I/V conversion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1MHz - enables stable unity-gain buffering and low-frequency filtering up to ~100kHz with minimal phase lag. |
| Slew Rate | 0.8V/µs - supports clean 10kHz full-scale sine wave output at 2Vpp without distortion in G=1 configuration. |
| Input Offset Voltage | ±1mV max - ensures ≤10mV error in 10V full-scale measurement systems without trimming. |
| Quiescent Current | 150µA typ per amplifier - allows dual-channel operation on <300µA total, ideal for coin-cell or energy-harvesting applications. |
| THD + Noise | 0.006% at 1kHz - meets CD-quality audio requirements and preserves SNR in 12-bit ADC driver stages. |
| Rail-to-Rail Output Swing | Within 1mV of rails (RL = 100kΩ) - maximizes dynamic range in 3.3V or 5V systems, e.g., driving ADS7822 A/D reference inputs. |
| Common-Mode Range | –0.3V to (V+) + 0.3V - accepts inputs below ground or above V+, simplifying level-shifting in mixed-signal interfaces. |
Pinout & Package
OPA2344UA/2K5 is supplied in an 8-pin SOIC (SO-8) package with standard industry footprint (Package Drawing D), RoHS-compliant NiPdAu lead finish, and Moisture Sensitivity Level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | High-impedance node accepting differential signal; rail-to-rail capable from –0.3V to V+ +0.3V. |
| 2 | Non-Inverting Input (Amplifier A) | High-Z input for A-channel; matches Pin 1 in offset, bias, and CMRR performance. |
| 3 | Output (Amplifier A) | Class AB rail-to-rail output capable of sourcing/sinking ±15mA; swings to within 1mV of V+ or V– under light load. |
| 4 | V– (Ground or Negative Supply) | Reference return for both amplifiers; must be low-impedance; bypass with 0.01µF ceramic capacitor. |
| 5 | V+ (Positive Supply) | Single-supply input (2.7V–5.5V); requires local 0.01µF ceramic decoupling to minimize PSRR degradation. |
| 6 | Non-Inverting Input (Amplifier B) | Independent high-Z input for B-channel; identical specs to Pin 2; enables dual-channel signal processing. |
| 7 | Inverting Input (Amplifier B) | Matches Pin 1 for B-channel; supports matched dual configurations like instrumentation amp front-ends. |
| 8 | Output (Amplifier B) | Second rail-to-rail output; electrically isolated from Pin 3; supports independent gain/feedback networks. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 2.7V–5.5V supply range - critical for maximizing SNR in low-voltage data acquisition and microphone preamps. |
| Unity-gain stable architecture | Eliminates need for external compensation in buffer, follower, or gain-of-one configurations - reduces BOM count and layout area. |
| Ultra-low quiescent current (150µA/amplifier) | Supports always-on sensor monitoring with dual-channel analog front-end consuming <300µA total - extends battery life in portable medical devices. |
| Low THD+N (0.006%) | Preserves signal integrity in audio-path applications such as electret microphone conditioning and speech bandpass filters. |
| High CMRR (92dB) and PSRR (200µV/V) | Maintains accuracy in noisy industrial environments where supply ripple or common-mode interference would otherwise corrupt low-level sensor signals. |
Applications
| PCMCIA Data Acquisition | Audio Processing Front-End |
|---|---|
Use Scenario: Signal conditioning for 12-bit sampling ADCs (e.g., ADS7822) in compact PCMCIA cards with tight power budgets. IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage driving switched-capacitor ADC inputs while rejecting charge injection artifacts. Use Value: Rail-to-rail swing ensures full 0–VREF ADC input range utilization; 150µA/amplifier enables multi-channel acquisition on <500µA total system current. | Use Scenario: Electret microphone preamplification and bandpass filtering (300Hz–3kHz) in voice-enabled portable devices. IC Role / Device Role / Timing Role: First-stage gain block (G=100) and active filter integrator in single-supply, low-noise audio path. Use Value: 0.006% THD+N preserves speech fidelity; rail-to-rail input accepts microphone bias voltage; 30nV/√Hz noise floor maintains >70dB SNR. |
| Process Control Sensor Interface | Active Filter for Industrial Monitoring |
Use Scenario: Amplifying low-level outputs from RTDs, thermocouples, or bridge sensors in factory-floor transmitters. IC Role / Device Role / Timing Role: Precision instrumentation front-end with matched dual channels for differential sensing and reference buffering. Use Value: ±1mV max VOS and 76–92dB CMRR ensure <0.1% measurement error across –40°C to +85°C operating range. | Use Scenario: 2nd-order low-pass or bandpass filtering in vibration or current-monitoring systems requiring stable DC accuracy. IC Role / Device Role / Timing Role: Dual op-amp implementing Sallen-Key or state-variable topology with unity-gain stability and low drift. Use Value: 1MHz GBW supports cutoff frequencies up to ~100kHz; 3µV/°C max dVOS/dT minimizes temperature-induced filter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2344EA/2K5 | Same electrical specs but in MSOP-8 (DGK) package - 3.0mm × 3.0mm vs SOIC-8's 4.9mm × 6.0mm. | Preferred for ultra-compact PCBs where board area is constrained; thermal resistance θJA = 150°C/W vs SOIC's 150°C/W - identical thermal performance. | Select OPA2344EA/2K5 when footprint reduction is critical and reflow profile supports MSOP handling. |
| TLV2462IDR | Higher quiescent current (550µA/amplifier), lower GBW (6.4MHz), no guaranteed 1mV rail-to-rail output swing spec. | Acceptable for higher-speed, non-precision applications; not suitable for sub-1mV swing or <300µA power budget requirements. | Choose TLV2462IDR only if speed >1MHz is required and power/accuracy trade-offs are acceptable. |
Compared with OPA2344UA/2K5, the OPA2344EA/2K5 offers identical performance in a smaller footprint, while the TLV2462IDR trades precision and ultra-low power for higher bandwidth - making OPA2344UA/2K5 optimal for battery-powered, space-constrained, high-fidelity analog signal chains.
Availability
OPA2344UA/2K5 is available at Aetrix Electronics and suitable for PCMCIA data acquisition, portable audio front-ends, and industrial sensor interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for OPA2344UA/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 delivering analog and embedded processing solutions with deep expertise in precision amplifiers, data converters, and low-power design.
The OPA2344UA/2K5 belongs to TI's MicroAmplifier™ series - engineered specifically for miniature, single-supply, rail-to-rail applications demanding high accuracy, ultra-low power, and robust performance across extended temperature ranges.
FAQ
What is the maximum operating supply voltage for the OPA2344UA/2K5?
The OPA2344UA/2K5 has an absolute maximum supply voltage rating 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 shift or reliability degradation. For reliable long-term use, maintain VS within 2.7V–5.5V, with 5.5V being the upper limit for guaranteed specifications including offset voltage, CMRR, and THD+N.
Is the OPA2344UA/2K5 unity-gain stable, and what does that mean for circuit design?
Yes, the OPA2344UA/2K5 is unity-gain stable, meaning it remains stable with closed-loop gain ≥1 without requiring external compensation components. This allows direct implementation as a voltage follower, non-inverting buffer, or gain-of-one amplifier - simplifying design, reducing component count, and minimizing PCB area. Stability is verified per TI's SBOS107A datasheet under capacitive load conditions up to 250pF.
Can the OPA2344UA/2K5 drive an ADC input directly, and which ADCs are compatible?
Yes, the OPA2344UA/2K5 is explicitly optimized to drive sampling ADCs such as the ADS7822. Its rail-to-rail output swing, low output impedance, and fast settling time (5µs to 0.1%) enable clean charging of ADC input capacitance while rejecting charge injection. Verified compatibility includes 12-bit, low-power SAR converters in MSOP-8 packages - ideal for compact, low-current data acquisition systems.
What is the input common-mode voltage range of the OPA2344UA/2K5, and why does it matter?
The OPA2344UA/2K5 features a rail-to-rail input common-mode range from –0.3V to (V+) + 0.3V - extending 300mV beyond both supply rails. This allows interfacing with signals referenced to ground in single-supply systems, accepting bipolar inputs, or accommodating level-shifted sensor outputs without external clamping or biasing - increasing design flexibility and reducing external component count in mixed-signal applications.
Does the OPA2344UA/2K5 require external decoupling capacitors, and if so, what value and placement is recommended?
Yes, the OPA2344UA/2K5 requires local 0.01µF ceramic decoupling capacitors placed as close as possible between V+ (Pin 5) and V– (Pin 4). This minimizes high-frequency supply noise coupling, maintains PSRR above 100dB up to 10kHz, and prevents oscillation due to supply impedance. TI's SBOS107A datasheet confirms this practice is essential for achieving specified THD+N, CMRR, and stability across the –40°C to +85°C range.
OPA2344UA/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:
- CMOS
- Number of Circuits:
- 2
- 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 (x2 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:
- 8-SOIC
OPA2344UA/2K5 FAQ
1.How can I place an order for OPA2344UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2344UA/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 OPA2344UA/2K5 reliable?
The price and inventory of OPA2344UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2344UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA2344UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2344UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2344UA/2K5?
OPA2344UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2344UA/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 OPA2344UA/2K5?
For technical support, including OPA2344UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2344UA/2K5 requirements.
6.How does Aetrix verify that OPA2344UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA2344UA/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 OPA2344UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA2344UA/2K5?
All OPA2344UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2344UA/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 OPA2344UA/2K5 part is unused and in its original packaging.
Return procedure for OPA2344UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2344UA/2K5 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
