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Texas Instruments OPA2344EA/250
- Part No.:
- OPA2344EA/250
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2344EA/250.pdf
- Description:
- IC CMOS 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,302
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Product details
Overview
OPA2344EA/250 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 drives sampling ADCs in portable data acquisition systems.
For engineers reviewing the OPA2344EA/250 datasheet, OPA2344EA/250 pinout, OPA2344EA/250 application, or OPA2344EA/250 equivalent, key selection criteria include rail-to-rail I/O swing within 1 mV of rails, unity-gain stability, microamp-level supply current, MSOP-8 thermal performance (θJA = 150°C/W), and operation across –40°C to +85°C.
Technical Context
The OPA2344EA/250 implements a complementary CMOS input stage enabling rail-to-rail common-mode range extending 300 mV beyond both supply rails. Its class AB output stage delivers rail-to-rail output swing-within 1 mV of rails at light loads (100 kΩ) and within 40 mV at 5 kΩ-while maintaining ≥96 dB open-loop gain.
It is unity-gain stable and specified for single-supply operation from 2.7 V to 5.5 V. Input bias current is ultra-low (±10 pA max), noise is 30 nV/√Hz at 10 kHz, and THD+N is 0.006% at 1 kHz with 3 Vp-p output.
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 adequate phase margin. |
| Slew Rate | 0.8 V/µs - enables full-scale settling of 2 V step in 5 µs (0.1%), suitable for medium-speed data acquisition. |
| Input Offset Voltage | ±1 mV max - ensures ≤1 mV dc error in precision I/V or sensor amplification circuits without trimming. |
| Quiescent Current | 150 µA typ per amplifier - allows dual-channel operation below 300 µA total, critical for battery-powered instrumentation. |
| Rail-to-Rail Output Swing | Within 1 mV of rails (100 kΩ load) - maximizes dynamic range in 3 V or 5 V single-supply systems driving SAR ADC inputs. |
| THD + Noise | 0.006% at 1 kHz - preserves audio and sensor signal fidelity in active filters and microphone preamps. |
| Common-Mode Range | –0.3 V to (V+) + 0.3 V - accepts inputs below ground or above V+, simplifying level-shifting in mixed-signal interfaces. |
Pinout & Package
OPA2344EA/250 is packaged in an 8-pin MSOP (VSSOP-8, package drawing DGK), with exposed thermal pad for enhanced power dissipation (θJA = 150°C/W). The device marking is "C44".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Channel A) | High-impedance node (1013 Ω || 6 pF) accepting rail-to-rail common-mode signals; connects to feedback network in inverting configurations. |
| 2 | Non-Inverting Input (Channel A) | Same high-Z, rail-to-rail input as Pin 1; used for unity-gain buffers or non-inverting amplifiers where VCM = VIN. |
| 3 | Output (Channel A) | Class AB rail-to-rail output capable of sourcing/sinking ±15 mA; swings to within 1 mV of V+ or V– under light load. |
| 4 | V– (Ground or Negative Supply) | Reference return for both amplifiers; must be low-impedance; bypassed with 0.01 µF ceramic capacitor near pin. |
| 5 | V+ (Positive Supply) | Single-supply input (2.7–5.5 V); requires local 0.01 µF ceramic decoupling to minimize PSRR degradation. |
| 6 | Non-Inverting Input (Channel B) | Independent high-Z input for second amplifier; identical specs to Pin 2; enables dual-path signal conditioning. |
| 7 | Inverting Input (Channel B) | Independent high-Z input for Channel B; matches Pin 1 electrical behavior and layout requirements. |
| 8 | Output (Channel B) | Second rail-to-rail output; electrically isolated from Channel A; supports independent gain/feedback networks. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 2.7–5.5 V supply range-critical for maximizing SNR when driving 12-bit ADCs like ADS7822. |
| 150 µA typical quiescent current per amplifier | Supports dual-channel operation at <300 µA total, meeting sub-500 µA system budget for portable medical or sensor nodes. |
| Unity-gain stable design | Eliminates need for external compensation in buffer, filter, or transimpedance configurations-reducing BOM count and layout area. |
| Ultra-low input bias current (±10 pA max) | Prevents significant voltage error across high-value feedback resistors (>1 MΩ), essential for photodiode or pH sensor interfaces. |
| Specified from –40°C to +85°C | Validates performance across industrial temperature range without derating-enabling use in uncontrolled environments like factory-floor DAQ modules. |
Applications
| PCMCIA Data Acquisition | Speech Bandpass Filtering |
|---|---|
Use Scenario: Portable PCMCIA card acquiring analog sensor data (e.g., thermocouple, strain gauge) with on-board 12-bit SAR ADC. IC Role / Device Role / Timing Role: Dual op amp provides programmable gain and anti-alias filtering before ADC sampling; Channel A conditions signal, Channel B buffers reference. Use Value: Rail-to-rail I/O captures full ADC input range (0–VREF) from 3 V supply; 150 µA per channel minimizes card power draw. | Use Scenario: Electret microphone interface in voice recorder or VoIP endpoint, requiring 300 Hz–3 kHz bandpass response. IC Role / Device Role / Timing Role: OPA2344EA/250 implements 2nd-order active bandpass filter (G = 100) and DC-blocking buffer in compact MSOP-8 footprint. Use Value: 0.006% THD+N preserves speech intelligibility; 1 MHz GBW supports filter Q-factor without peaking; dual channel integrates filter + buffer. |
| Low-Power Sensor Signal Conditioning | ADC Driver for Sampling Converters |
Use Scenario: Battery-powered environmental monitor measuring temperature/humidity with microamp-level supply constraints. IC Role / Device Role / Timing Role: Amplifies low-level sensor outputs (e.g., RTD bridge, capacitive humidity) and rejects common-mode noise via differential configuration. Use Value: ±10 pA input bias avoids error with 10 MΩ sensor elements; rail-to-rail input accepts wide common-mode shifts from supply-varying sensors. | Use Scenario: Driving ADS7822 12-bit sampling ADC in handheld test equipment with 2.7–5 V supply. IC Role / Device Role / Timing Role: Buffers ADC input capacitance (10 pF), absorbs charge injection kickback, and provides gain/level shift prior to sampling. Use Value: Settles 2 V step in 5 µs (0.1%)-matches ADS7822's 1 µs acquisition time; rail-to-rail output ensures full-scale code utilization. |
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 | SOIC-8 package (θJA = 150°C/W), same electrical specs, no exposed thermal pad. | Preferred for through-hole prototyping or legacy PCBs with SOIC footprints; lower thermal performance in high-density layouts. | Select OPA2344UA when board space allows larger SOIC and thermal management is less constrained. |
| MCP6022-E/SN | 2 MHz GBW, 1.2 V/µs slew rate, 100 µA IQ, Microchip; not unity-gain stable (min G = 2). | Better speed for higher-frequency filtering but requires gain ≥2; unsuitable for unity-gain buffers without compensation. | Choose MCP6022-E/SN only when >1 MHz bandwidth is required and circuit topology supports G ≥ 2. |
Compared with OPA2344UA and MCP6022-E/SN, the OPA2344EA/250 offers optimal trade-off of ultra-low quiescent current, guaranteed unity-gain stability, and compact MSOP-8 packaging-making it uniquely suited for space- and power-constrained dual-channel signal chains where rail-to-rail I/O and precision are mandatory.
Availability
OPA2344EA/250 is available at Aetrix Electronics and suitable for portable data acquisition, battery-powered sensor nodes, and voice-band signal conditioning requiring stable component supply and RoHS-compliant, green packaging.
Supply support for OPA2344EA/250 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 specializing in analog and embedded processing technologies, with leadership in precision op amps, data converters, and power management ICs.
The OPA2344EA/250 belongs to TI's MicroAmplifier™ series, designed specifically for low-power, miniature, single-supply applications demanding rail-to-rail performance and high precision in space-constrained systems.
FAQ
What supply voltage range does the OPA2344EA/250 support?
The OPA2344EA/250 operates from 2.7 V to 5.5 V on a single supply, with full specifications guaranteed over this range at –40°C to +85°C. It can tolerate transient operation down to 2.5 V, though some parameters (e.g., output swing, GBW) may degrade slightly below 2.7 V. The absolute maximum supply is 7.5 V.
Is the OPA2344EA/250 unity-gain stable?
Yes, the OPA2344EA/250 is explicitly unity-gain stable, as confirmed in the Applications Information section of the SBOS107A datasheet. This allows direct use in voltage followers, active filters, and transimpedance configurations without external compensation components-unlike the OPA2345 family, which requires minimum gain of 5.
What is the thermal resistance (θJA) of the OPA2344EA/250 in its MSOP-8 package?
The OPA2344EA/250 in the MSOP-8 (DGK) package has a junction-to-ambient thermal resistance (θJA) of 150°C/W, as specified in the Thermal Resistance table of the SBOS107A datasheet. This value assumes standard JEDEC 2-layer board conditions; adding copper pour or thermal vias can improve actual thermal performance.
Can the OPA2344EA/250 drive capacitive loads directly?
The OPA2344EA/250 can directly drive up to 250 pF of pure capacitive load in unity-gain configuration while maintaining stability. For loads exceeding 250 pF or when resistive load is present in parallel, a small series resistor (10–20 Ω) between output and capacitor improves phase margin and reduces ringing without significantly affecting DC accuracy.
What is the maximum input voltage beyond the supply rails that the OPA2344EA/250 can tolerate?
The OPA2344EA/250 input terminals are diode-clamped to the supply rails. Inputs may safely swing to (V–) – 0.5 V and (V+) + 0.5 V. However, if input voltage falls more than 0.3 V below V– (e.g., below ground in single-supply use), output lockup may occur-requiring Schottky clamping per Figure 4 in the datasheet to prevent malfunction.
OPA2344EA/250 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/250 FAQ
1.How can I place an order for OPA2344EA/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2344EA/250 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/250 reliable?
The price and inventory of OPA2344EA/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2344EA/250 is usually 5 days.
3.What payment methods are accepted for OPA2344EA/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2344EA/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2344EA/250?
OPA2344EA/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2344EA/250 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/250?
For technical support, including OPA2344EA/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2344EA/250 requirements.
6.How does Aetrix verify that OPA2344EA/250 is sourced from the original manufacturer or authorized distributors?
All OPA2344EA/250 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/250 meets industry standards.
7.What is the process for return or replacement of OPA2344EA/250?
All OPA2344EA/250 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2344EA/250, 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/250 part is unused and in its original packaging.
Return procedure for OPA2344EA/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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