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Texas Instruments OPA2344EA/2K5G4
- Part No.:
- OPA2344EA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2344EA/2K5G4.pdf
- Description:
- IC CMOS 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,858
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Product details
Overview
OPA2344EA/2K5G4 from Texas Instruments is a dual, rail-to-rail input/output CMOS operational amplifier optimized for low-power, single-supply precision applications. It features 1 MHz gain-bandwidth, 0.8 V/µs slew rate, ±1 mV max input offset voltage, 150 µA typical quiescent current per amplifier, and operates from 2.7 V to 5.5 V. It is widely used in data acquisition front-ends driving 12-bit ADCs like the ADS7822.
For engineers reviewing the OPA2344EA/2K5G4 datasheet, OPA2344EA/2K5G4 pinout, OPA2344EA/2K5G4 application, or OPA2344EA/2K5G4 equivalent, key selection criteria include rail-to-rail I/O swing within 1 mV of rails, unity-gain stability, THD+N of 0.006%, microamp-level quiescent current, and MSOP-8 package compatibility with space-constrained PCB layouts.
Technical Context
The OPA2344EA/2K5G4 implements a complementary CMOS input stage-parallel N-channel and P-channel differential pairs-to achieve rail-to-rail input common-mode range extending 300 mV beyond both supply rails. Its class AB output stage enables rail-to-rail output swing down to 1 mV at light loads (100 kΩ).
It is unity-gain stable and specified over –40°C to +85°C. The dual-channel architecture shares identical per-amplifier specs-including 122 dB open-loop gain, 92 dB CMRR (at 5.5 V), and 30 nV/√Hz input voltage noise density-enabling matched performance in differential or multi-stage signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1 MHz - supports stable unity-gain buffering and low-frequency signal conditioning up to ~100 kHz with minimal phase lag. |
| Slew Rate | 0.8 V/µs - enables clean 10 kHz full-scale sine wave output at 2 Vpp without distortion in single-supply systems. |
| Input Offset Voltage | ±1 mV max - ensures ≤10 mV error in 10 V full-scale instrumentation amplifiers, critical for 12-bit ADC interface accuracy. |
| Quiescent Current | 150 µA per amplifier typ - allows dual-channel operation below 300 µA total, enabling battery-powered data loggers with multi-year runtime. |
| Input Voltage Range | –0.3 V to (V+) + 0.3 V - permits direct interfacing with sensors operating near ground or above V+ (e.g., electret mic bias networks). |
| THD + Noise | 0.006% at 1 kHz - meets audio-grade fidelity requirements for speech bandpass filtering and microphone preamplification. |
| Output Swing | Within 1 mV of rails (RL = 100 kΩ) - maximizes dynamic range in 3.3 V or 5 V systems, preserving >99.9% of available ADC input range. |
Pinout & Package
OPA2344EA/2K5G4 is packaged in an 8-pin MSOP (VSSOP-8, package drawing DGK), with exposed thermal pad for enhanced power dissipation in compact layouts. Pin pitch is 0.5 mm; body dimensions are 3.0 mm × 3.0 mm × 1.0 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | High-impedance node (10¹³ Ω || 6 pF) accepting differential signals; must be guarded in high-Z sensor interfaces. |
| 2 | Non-Inverting Input (Amplifier A) | Matches Pin 1 impedance and offset characteristics; used for unity-gain buffers or active filters requiring matched inputs. |
| 3 | Output (Amplifier A) | Capable of sourcing/sinking ±15 mA; drives 600 Ω loads rail-to-rail; requires 0.01 µF bypass capacitor on V+ for stability. |
| 4 | Ground / Negative Supply | Reference return for both amplifiers; must be low-impedance path to minimize crosstalk between channels. |
| 5 | Positive Supply | Accepts 2.7 V to 5.5 V single supply; bypassing with 0.01 µF ceramic capacitor at pin is mandatory for PSRR >130 dB. |
| 6 | Non-Inverting Input (Amplifier B) | Electrically identical to Pin 2; enables independent dual-channel configuration without performance trade-offs. |
| 7 | Inverting Input (Amplifier B) | Matches Pin 1; supports fully differential stages when paired with Pin 6 and external feedback network. |
| 8 | Output (Amplifier B) | Independent output with same drive capability as Pin 3; channel separation >120 dB prevents inter-channel distortion in stereo or dual-sensor systems. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Common-mode range extends 300 mV beyond supplies-enables direct connection to 0 V-referenced sensors (e.g., electret mics) without level-shifting circuitry. |
| Rail-to-rail output | Swings to within 1 mV of V+ and V– at high-Z loads-preserves full-scale resolution when driving SAR ADC reference inputs or DAC output buffers. |
| Unity-gain stability | Guaranteed stable at G = 1 without external compensation-simplifies design of precision buffers, active filters, and I/V converters in portable equipment. |
| Low THD+N | 0.006% at 1 kHz supports high-fidelity audio signal paths and low-distortion sensor excitation in metrology-grade data acquisition. |
| Microsize MSOP-8 | 3.0 mm × 3.0 mm footprint saves >60% board area vs SOIC-8-critical for PCMCIA cards, wearable biosensors, and miniaturized test probes. |
Applications
| PCMCIA Data Acquisition Card | Speech Bandpass Filter System |
|---|---|
Use Scenario: Signal conditioning front-end for 12-bit sampling ADC (e.g., ADS7822) in portable field data loggers using PCMCIA form factor. IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage: Channel A conditions microphone signal; Channel B drives ADC input while rejecting charge injection. Use Value: Rail-to-rail I/O preserves >99.7% of 3.3 V ADC input range; 150 µA per amplifier enables <500 µA total system quiescent current. | Use Scenario: Electret microphone interface with 300 Hz–3 kHz bandpass filtering for voice recording in handheld devices. IC Role / Device Role / Timing Role: First-stage amplifier (G = 100) and second-stage filter driver-both channels operate from single 3.3 V rail with no level shifters. Use Value: 0.006% THD+N ensures intelligible speech capture; ±1 mV offset minimizes DC bias drift across temperature in uncalibrated consumer units. |
| Low-Power Process Transmitter | Portable Test Equipment Input Stage |
Use Scenario: 4–20 mA loop-powered sensor transmitter with local analog signal processing before digitization. IC Role / Device Role / Timing Role: Precision I/V conversion and anti-alias filtering-Channel A converts current to voltage; Channel B provides buffered output to ADC. Use Value: 122 dB open-loop gain ensures <0.01% linearity error over 16 mA span; 150 µA IQ allows operation within strict 3.5 mA loop budget. | Use Scenario: Input buffer for handheld multimeters or oscilloscope probes requiring high-Z, low-noise front-end amplification. IC Role / Device Role / Timing Role: Unity-gain buffer isolating DMM input from internal circuitry-rejects ESD transients via integrated 4 kV HBM protection. Use Value: 10¹³ Ω input impedance prevents loading of high-impedance probes; rail-to-rail output drives internal 12-bit ADC without clipping at ±2.5 V full scale. |
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 | Same silicon, SOIC-8 package (5.0 mm × 6.2 mm); 150 °C/W θJA vs 150 °C/W for MSOP-8; identical electrical specs. | Requires larger PCB area; better suited for prototyping or through-hole rework; not suitable for ultra-compact modules. | Select when board space permits and hand-soldering or socket-based validation is needed. |
| MCP6022-E/SN | 2 MHz GBW, 1.2 V/µs SR, 100 µA IQ; lower input bias current (1 pA typ); not unity-gain stable-requires ≥5 gain for stability. | Higher speed but incompatible with unity-gain buffers; unsuitable for ADC driver applications requiring G = 1. | Choose only for fixed-gain ≥5 signal chains where bandwidth >1 MHz is required and layout allows compensation components. |
Compared with OPA2344UA/2K5, the OPA2344EA/2K5G4 offers identical performance in a 40% smaller footprint-critical for embedded modules-while the MCP6022-E/SN trades unity-gain stability for higher bandwidth, limiting its use in precision buffer roles.
Availability
OPA2344EA/2K5G4 is available at Aetrix Electronics and suitable for PCMCIA data acquisition cards, speech processing systems, low-power process transmitters, and portable test equipment requiring stable component supply, RoHS-compliant packaging, and guaranteed -40°C to +85°C operation.
Supply support for OPA2344EA/2K5G4 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 OPA2344EA/2K5G4 belongs to TI's MicroAmplifier™ series-designed specifically for miniature, battery-operated, single-supply systems demanding rail-to-rail I/O, sub-200 µA quiescent current, and 12-bit+ ADC interface fidelity.
FAQ
What supply voltage range does the OPA2344EA/2K5G4 support?
The OPA2344EA/2K5G4 operates from a single supply of 2.7 V to 5.5 V, with full specifications guaranteed across this range. It can tolerate transient operation down to 2.5 V, making it suitable for Li-ion battery-powered systems where voltage sags occur. Absolute maximum supply is 7.5 V, but sustained operation outside 2.7–5.5 V voids parametric guarantees. The OPA2344EA/2K5G4 maintains rail-to-rail input and output functionality across its entire rated supply range.
Is the OPA2344EA/2K5G4 unity-gain stable?
Yes, the OPA2344EA/2K5G4 is explicitly unity-gain stable, as confirmed in TI's SBOS107A datasheet. It requires no external compensation for stable operation at gain = 1, unlike the OPA2345 family. This makes the OPA2344EA/2K5G4 ideal for buffer configurations, active filters, and ADC driver circuits where minimal external components are essential. Stability is verified under capacitive load conditions up to 250 pF in unity-gain mode.
What is the input common-mode voltage range of the OPA2344EA/2K5G4?
The OPA2344EA/2K5G4 features a rail-to-rail input stage with a common-mode voltage range from –0.3 V to (V+) + 0.3 V. This allows direct interfacing with signals that go slightly below ground (e.g., electret microphone outputs) or above the positive rail-provided input current is limited to ≤10 mA. Operation within the transition region (approximately V+ – 1.8 V to V+ – 0.8 V) may degrade PSRR and CMRR, so biasing outside this zone is recommended for highest precision.
How does the OPA2344EA/2K5G4 perform driving capacitive loads?
The OPA2344EA/2K5G4 can directly drive up to 250 pF of pure capacitive load in unity-gain configuration while maintaining stability and <5% overshoot. For heavier loads or improved step response, a 10 Ω–20 Ω series resistor (RS) between output and load is recommended-this isolates the amplifier from capacitance without introducing significant DC error if RL > 10 kΩ. The OPA2344EA/2K5G4's internal compensation ensures robust behavior even with layout parasitics typical in MSOP-8 routing.
What are the thermal characteristics of the OPA2344EA/2K5G4 in its MSOP-8 package?
The OPA2344EA/2K5G4 in MSOP-8 (DGK) package has a junction-to-ambient thermal resistance (θJA) of 150 °C/W, measured per JEDEC JESD51-7 standard on a 1-inch² 2-layer board with 2 oz copper. With 150 µA per amplifier (300 µA total), power dissipation is ~1.5 mW at 5 V, resulting in negligible junction temperature rise (<0.25 °C) under normal conditions. The exposed thermal pad improves heat transfer-TI recommends soldering it to a thermal plane for high-temperature or high-output-current operation.
OPA2344EA/2K5G4 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:
- Discontinued at Digi-Key
- 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/2K5G4 FAQ
1.How can I place an order for OPA2344EA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2344EA/2K5G4 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/2K5G4 reliable?
The price and inventory of OPA2344EA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2344EA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA2344EA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2344EA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2344EA/2K5G4?
OPA2344EA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2344EA/2K5G4 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/2K5G4?
For technical support, including OPA2344EA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2344EA/2K5G4 requirements.
6.How does Aetrix verify that OPA2344EA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA2344EA/2K5G4 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/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA2344EA/2K5G4?
All OPA2344EA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2344EA/2K5G4, 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/2K5G4 part is unused and in its original packaging.
Return procedure for OPA2344EA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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