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Texas Instruments OPA2344EA/2K5
- Part No.:
- OPA2344EA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2344EA/2K5.pdf
- Description:
- IC CMOS 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:22,227
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Product details
Overview
OPA2344EA/2K5 from Texas Instruments is a dual, 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 per amplifier, and operates from 2.7V to 5.5V - enabling high-dynamic-range signal conditioning in space-constrained data acquisition systems.
For engineers reviewing the OPA2344EA/2K5 datasheet, OPA2344EA/2K5 pinout, OPA2344EA/2K5 application, or OPA2344EA/2K5 equivalent, key selection criteria include rail-to-rail I/O swing within 1mV of rails, unity-gain stability, microamp-level supply current, THD+N of 0.006%, and MSOP-8 thermal performance (θJA = 150°C/W) for battery-powered sensor interfaces and portable instrumentation.
Technical Context
The OPA2344EA/2K5 implements a complementary CMOS input stage with parallel N-channel and P-channel differential pairs, enabling rail-to-rail input common-mode range extending 300mV beyond V– and V+. Its class AB output stage achieves rail-to-rail output swing while maintaining ≥96dB open-loop gain at light loads.
This dual op amp is unity-gain stable and specified over –40°C to +85°C. It features 10¹³Ω input impedance, 30nV/√Hz input voltage noise density at 10kHz, and supports capacitive load drive up to 250pF in unity-gain configuration without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1MHz - supports stable closed-loop operation up to ~100kHz at G = 10 without phase margin degradation. |
| Slew Rate | 0.8V/µs - enables full-scale settling of 2V output steps in ≤5µs (0.1%), suitable for medium-speed ADC driving. |
| Input Offset Voltage | ±1mV max - ensures <1LSB error when buffering 12-bit ADC references (e.g., 5V full-scale = 1.22mV/LSB). |
| Quiescent Current | 150µA per amplifier typ - allows dual-channel operation at <300µA total, critical for multi-day battery life in portable sensors. |
| THD + Noise | 0.006% at 1kHz - preserves audio and sensor signal fidelity in active filters and microphone preamps. |
| Rail-to-Rail Output Swing | Within 1mV of rails (RL = 100kΩ) - maximizes usable dynamic range in 3.3V or 5V single-supply systems. |
| 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
OPA2344EA/2K5 is packaged in an 8-pin MSOP (VSSOP-8, package drawing DGK), measuring 3.0mm × 3.0mm × 1.0mm with exposed thermal pad. This thermally enhanced surface-mount package delivers θJA = 150°C/W and supports reflow soldering per JEDEC Level-2 moisture sensitivity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input B (–In B) | High-impedance node for feedback network connection in Channel B; accepts signals from –0.3V to V+ + 0.3V. |
| 2 | Non-Inverting Input A (+In A) | High-Z input for Channel A; laser-trimmed matching to –In A enables precision differential gain configurations. |
| 3 | Output A (Out 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) | Power reference for both amplifiers; must be bypassed with 0.01µF ceramic capacitor near pin for stability. |
| 5 | V+ (Positive Supply) | Single-supply input (2.7V–5.5V); supplies both channels; requires local 0.01µF ceramic decoupling. |
| 6 | Non-Inverting Input B (+In B) | Independent high-Z input for Channel B; identical specs to +In A, enabling matched dual-sensor front-ends. |
| 7 | Inverting Input A (–In A) | Primary feedback node for Channel A; matched to +In A for <0.2µV/°C drift in precision instrumentation. |
| 8 | Output B (Out B) | Second rail-to-rail output; electrically isolated from Out A; supports independent gain/feedback networks per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 2.7V–5.5V supply range - no headroom loss in single-supply data acquisition or audio paths. |
| Unity-gain stable architecture | Eliminates need for external compensation in buffer, follower, or gain-of-1 configurations - reduces BOM count and layout area. |
| 150µA per amplifier quiescent current | Supports always-on sensor monitoring with dual-channel analog front-end consuming <300µA total at 3.3V. |
| 0.006% THD+N at 1kHz | Maintains signal integrity in voice-band filtering (300Hz–3kHz) and electret microphone conditioning without harmonic distortion artifacts. |
| 10¹³Ω input impedance | Minimizes loading on high-impedance sources like piezoelectric sensors or pH electrodes - preserves signal amplitude and bandwidth. |
Applications
| PCMCIA Data Acquisition | Speech Bandpass Filtering |
|---|---|
Use Scenario: Low-profile PCMCIA card acquiring analog sensor data (e.g., temperature, pressure) in field-deployable test equipment. IC Role / Device Role / Timing Role: Dual-channel signal conditioner: Channel A buffers sensor output; Channel B drives 12-bit sampling ADC (e.g., ADS7822) with rail-to-rail swing. Use Value: 150µA per amplifier enables >100-hour battery life; rail-to-rail I/O captures full sensor range on 3.3V supply; 0.006% THD+N preserves measurement accuracy. | Use Scenario: Electret microphone interface in portable voice recorder or teleconferencing device operating from 2.7V–5V. IC Role / Device Role / Timing Role: Dual op amp implementing bandpass filter (300Hz–3kHz) and microphone biasing - one channel as active filter, second as buffer. Use Value: Unity-gain stability eliminates compensation components; 1mV output swing from rail maximizes SNR in 3.3V system; 30nV/√Hz noise density maintains voice clarity. |
| Active Filter for Sensor Signal Conditioning | Low-Power I/V Conversion at DAC Output |
Use Scenario: Anti-aliasing and reconstruction filtering in battery-powered IoT node with microcontroller-integrated DAC and external ADC. IC Role / Device Role / Timing Role: Dual-channel Sallen-Key or multiple-feedback active filter: one section for LPF, second for HPF - both configured with precise resistor ratios. Use Value: Matched input offset (<±1mV) ensures filter symmetry; rail-to-rail output drives ADC input directly; 1MHz GBW supports cutoff frequencies up to 100kHz. | Use Scenario: Converting current-mode DAC output (e.g., 4–20mA loop or DAC8560) to precise voltage for analog actuator control in industrial edge device. IC Role / Device Role / Timing Role: Precision I/V converter using Channel A; Channel B provides buffered reference or gain-stage for calibration offset correction. Use Value: 10¹³Ω input impedance prevents DAC loading; ±1mV offset ensures <0.02% full-scale error at 5V; 150µA IQ enables continuous conversion during sleep modes. |
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 |
|---|---|---|---|
| OPA2344UA/2K5 | SOIC-8 package (5.0mm × 6.2mm), θJA = 150°C/W, same electrical specs. | Preferred for through-hole prototyping or legacy board designs requiring DIP-compatible footprint. | Select OPA2344UA/2K5 when manual assembly, thermal mass tolerance, or socket compatibility is required over size-constrained layouts. |
| OPA2343UA/2K5 | Lower quiescent current (85µA typ), 0.55MHz GBW, same rail-to-rail I/O and SOIC-8 packaging. | Better suited for ultra-low-power wake-on-event sensor nodes where speed <500kHz is acceptable. | Choose OPA2343UA/2K5 only if sub-100µA per amplifier is mandatory and 1MHz bandwidth is not required. |
Compared with OPA2344UA/2K5, the OPA2344EA/2K5 offers identical performance in a 60% smaller MSOP-8 footprint - critical for handheld medical devices and wearables. Versus OPA2343UA/2K5, it trades 65µA higher IQ for 82% higher bandwidth and superior THD+N (0.006% vs 0.01%), making it optimal for audio and medium-speed data acquisition.
Availability
OPA2344EA/2K5 is available at Aetrix Electronics and suitable for PCMCIA data acquisition, speech bandpass filtering, active sensor signal conditioning, and low-power I/V conversion requiring stable component supply across industrial, medical, and portable electronics programs.
Supply support for OPA2344EA/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 innovation in precision amplifiers and low-power signal chain solutions.
The OPA2344EA/2K5 belongs to TI's MicroAmplifier™ series - designed specifically for miniature, battery-operated systems demanding rail-to-rail performance, sub-200µA quiescent current, and robust single-supply operation from 2.7V to 5.5V.
FAQ
What supply voltage range does the OPA2344EA/2K5 support?
The OPA2344EA/2K5 operates from 2.7V to 5.5V single supply, with guaranteed specifications across this range. It can tolerate transient voltages up to 7.5V between V+ and V–. The device functions down to 2.5V, though some parameters (e.g., output swing, GBW) are not fully characterized below 2.7V. For reliable operation in production designs, use 2.7V–5.5V per the datasheet limits.
Is the OPA2344EA/2K5 unity-gain stable?
Yes, the OPA2344EA/2K5 is explicitly unity-gain stable, as confirmed in the Applications Information section of the SBOS107A datasheet. It requires no external compensation in G = 1 configurations such as voltage followers or non-inverting buffers. This stability is inherent to its internal compensation design and applies across the full –40°C to +85°C temperature range and 2.7V–5.5V supply range.
What is the maximum capacitive load the OPA2344EA/2K5 can drive in unity-gain configuration?
The OPA2344EA/2K5 can directly drive up to 250pF of pure capacitive load in unity-gain configuration while maintaining stability, as verified in the Typical Performance Curves. For loads exceeding 250pF, a 10Ω–20Ω series resistor between the output and capacitive load is recommended to suppress ringing without degrading DC accuracy - provided no significant resistive load is present in parallel.
Does the OPA2344EA/2K5 support rail-to-rail input common-mode voltage?
Yes, the OPA2344EA/2K5 supports rail-to-rail input common-mode voltage, extending from 0.3V below V– to 0.3V above V+. This is achieved via a complementary input stage with parallel N-channel and P-channel differential pairs. Operation across the transition region (≈1.4V–1.8V below V+) may slightly degrade PSRR and CMRR, but full rail-to-rail functionality is maintained for signal acquisition and buffering tasks.
What is the thermal resistance (θJA) of the OPA2344EA/2K5 in its MSOP-8 package?
The OPA2344EA/2K5 in the MSOP-8 (DGK) package has a junction-to-ambient thermal resistance (θJA) of 150°C/W, as specified in the Absolute Maximum Ratings table. This value assumes standard JEDEC 2-layer board conditions. Layout practices - including copper pour under the exposed thermal pad and adequate vias - can improve actual thermal performance in end-equipment.
OPA2344EA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-VSSOP
OPA2344EA/2K5 FAQ
1.How can I place an order for OPA2344EA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2344EA/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 OPA2344EA/2K5 reliable?
The price and inventory of OPA2344EA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2344EA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA2344EA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2344EA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2344EA/2K5?
OPA2344EA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2344EA/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 OPA2344EA/2K5?
For technical support, including OPA2344EA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2344EA/2K5 requirements.
6.How does Aetrix verify that OPA2344EA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA2344EA/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 OPA2344EA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA2344EA/2K5?
All OPA2344EA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2344EA/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 OPA2344EA/2K5 part is unused and in its original packaging.
Return procedure for OPA2344EA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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