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Texas Instruments OPA2343EA/2K5G4
- Part No.:
- OPA2343EA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2343EA/2K5G4.pdf
- Description:
- IC CMOS 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,253
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Product details
Overview
OPA2343EA/2K5G4 from Texas Instruments is a dual, rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation (2.7V to 5.5V). It delivers 5.5MHz gain-bandwidth, 6V/µs slew rate, 850µA per channel quiescent current, and output swing within 1mV of rails under 100kΩ load - enabling high-fidelity signal conditioning in space-constrained, battery-powered data acquisition and audio systems.
For engineers reviewing the OPA2343EA/2K5G4 datasheet, OPA2343EA/2K5G4 pinout, OPA2343EA/2K5G4 application, or OPA2343EA/2K5G4 equivalent, key selection criteria include rail-to-rail I/O performance at 2.7V supply, ultra-low input bias current (±0.2pA typ), THD+N of 0.0007% at 1kHz, and MSOP-8 thermal resistance (θJA = 150°C/W) for thermally demanding PCB layouts.
Technical Context
The OPA2343EA/2K5G4 employs a complementary CMOS input stage enabling rail-to-rail input common-mode range extending 500mV beyond supply rails, paired with a class AB output stage delivering true rail-to-rail output swing. Its unity-gain stable architecture supports driving capacitive loads up to 1000pF without external compensation.
Each amplifier operates independently with <0.2µV/V channel separation (dc), minimizing crosstalk in dual-channel signal paths. The device is fabricated on a 0.6µm CMOS process and specified over –40°C to +85°C, with extended operation from –55°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V - enables direct interface with 3.3V and 5V logic, and operation down to 2.5V for brownout resilience. |
| Gain-Bandwidth Product | 5.5MHz - supports stable closed-loop gain ≥10 at >500kHz, suitable for anti-aliasing and reconstruction filters. |
| Slew Rate | 6V/µs - ensures ≤1µs 0.1% settling for 2V step, critical for driving SAR ADC sample-and-hold inputs. |
| Input Bias Current | ±0.2pA (typ) - preserves accuracy in high-impedance sensor interfaces (e.g., photodiode transimpedance amps). |
| THD+N | 0.0007% at 1kHz - meets high-fidelity audio line-driver requirements without audible distortion. |
| Quiescent Current | 0.85mA per amplifier - allows dual-channel amplification in portable devices with <1.7mA total analog front-end draw. |
| Output Swing | Within 1mV of rails (100kΩ load) - maximizes dynamic range in 3.3V systems where headroom is limited. |
Pinout & Package
VSSOP-8 (DGK) package: 3mm × 3mm body, 0.65mm pitch, exposed thermal pad (not electrically connected), RoHS-compliant NiPdAu finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unused; must be left floating or tied to GND per layout best practice to reduce noise coupling. |
| 2 (+In A) | Non-inverting Input, Amplifier A | Accepts rail-to-rail common-mode signals from –0.3V to V+ +0.3V; high-impedance node for precision sensing. |
| 3 (–In A) | Inverting Input, Amplifier A | Differential input pair node; matched to Pin 2 for <2µV offset voltage and low CMRR degradation. |
| 4 (V–) | Negative Supply / Ground Reference | Return path for both amplifiers; requires local 0.01µF ceramic bypass to minimize PSRR degradation above 10kHz. |
| 5 (V+) | Positive Supply | Single-supply input (2.7–5.5V); connects to system VDD; bypass capacitor mandatory for stability. |
| 6 (–In B) | Inverting Input, Amplifier B | Independent input with same specs as Pin 3; no crosstalk coupling to Amplifier A due to isolated die layout. |
| 7 (+In B) | Non-inverting Input, Amplifier B | Matches Pin 2 in performance; enables dual-channel instrumentation or stereo audio buffering. |
| 8 (Out B) | Output, Amplifier B | Rail-to-rail capable; drives 600Ω loads directly; short-circuit protected to ±50mA continuous. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input/output | Enables full-scale signal utilization in 3.3V systems - e.g., 0–3.3V ADC input range without level-shifting circuitry. |
| Ultra-low input bias current (0.2pA) | Permits use with >100MΩ source impedances (e.g., pH electrodes, piezoelectric sensors) without significant offset error. |
| 5.5MHz GBW with 6V/µs slew rate | Supports 12-bit ADC driving at 100kHz sampling rates while maintaining <0.5LSB settling error. |
| 0.0007% THD+N at 1kHz | Meets consumer audio line-out specifications (e.g., USB DACs, portable media players) without post-filtering. |
| MSOP-8 thermal resistance (150°C/W) | Allows sustained 1.7mA operation at +85°C ambient without derating, simplifying thermal design in dense layouts. |
Applications
| PCMCIA Data Acquisition Card | Portable Audio Line Driver |
|---|---|
Use Scenario: Signal conditioning for 12-bit SAR ADC in compact PCMCIA card with 3.3V supply and space constraints. IC Role / Device Role / Timing Role: Dual op amp buffers analog sensor outputs and drives ADC input while rejecting charge injection kickback. Use Value: Rail-to-rail I/O eliminates need for external level shifters; 850µA/channel current enables >10-hour battery life in handheld DAQ units. |
Use Scenario: Stereo line-level output stage in Bluetooth speaker with 3.3V Li-ion supply and 10kΩ load. IC Role / Device Role / Timing Role: Dual non-inverting amplifier providing unity-gain buffering and DC blocking for left/right channels. Use Value: 0.0007% THD+N ensures transparent audio reproduction; 1mV rail swing preserves 99.97% of 3.3V peak-to-peak dynamic range. |
| Medical ECG Front-End | Industrial Sensor Signal Chain |
Use Scenario: First-stage amplification of microvolt-level biopotential signals in battery-powered ECG monitor. IC Role / Device Role / Timing Role: Dual amplifier configured as high-input-impedance instrumentation preamp (gain = 10) with active filtering. Use Value: 0.2pA input bias current prevents electrode polarization errors; rail-to-rail output accommodates variable reference voltages. |
Use Scenario: Conditioning 4–20mA loop receiver output in programmable logic controller (PLC) analog input module. IC Role / Device Role / Timing Role: Dual op amp converts current-to-voltage and provides buffered, scaled output for MCU ADC. Use Value: 5.5MHz bandwidth rejects 50/60Hz interference via active filtering; 2.7V min supply supports wide industrial input ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2343UA/2K5 | Same electrical specs; SO-8 package (4.9mm × 3.9mm) vs MSOP-8 (3mm × 3mm); θJA = 150°C/W (same), but larger footprint. | Preferred when legacy SO-8 layout reuse is required or thermal mass improves long-term reliability in high-temp environments. | Select OPA2343UA/2K5 only if board space permits larger package or existing SO-8 footprints exist. |
| MCP6022-E/SN | Lower GBW (10MHz) but higher quiescent current (1mA/ch); input bias current 1pA (5× higher); THD+N 0.001% (1.4× higher). | Better for higher-speed filtering but less optimal for ultra-low-power or ultra-high-impedance sensor nodes. | Choose MCP6022-E/SN only when 10MHz bandwidth is mandatory and power budget allows +0.3mA extra per channel. |
Compared with OPA2343UA/2K5, the OPA2343EA/2K5G4 saves 55% board area with identical performance; versus MCP6022-E/SN, it delivers superior input bias current and THD+N at lower power - making it optimal for portable, precision-sensing designs where size and fidelity are critical.
Availability
OPA2343EA/2K5G4 is available at Aetrix Electronics and suitable for PCMCIA data acquisition, portable audio line drivers, medical ECG front-ends, and industrial 4–20mA receiver modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2343EA/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 signal chain solutions.
The OPA343 family - including OPA2343EA/2K5G4 - was designed specifically for low-cost, miniature, single-supply applications demanding rail-to-rail I/O, low power, and high AC performance in data acquisition and audio systems.
FAQ
What is the maximum operating supply voltage for the OPA2343EA/2K5G4?
The OPA2343EA/2K5G4 has an absolute maximum supply voltage of 7.5V, but its specified operating range is 2.7V to 5.5V. Operation at 5.5V is fully characterized across –40°C to +85°C, with parameters guaranteed per SBOS090A. Exceeding 5.5V voids parametric guarantees and risks permanent damage.
Does the OPA2343EA/2K5G4 require external compensation for unity-gain stability?
No, the OPA2343EA/2K5G4 is unity-gain stable per its datasheet (SBOS090A). It drives pure capacitive loads up to 1000pF in G = 1 configuration without oscillation. For loads >1000pF, a 10Ω–20Ω series resistor at the output (as shown in Figure 4 of SBOS090A) restores phase margin without compromising dc accuracy significantly.
How does the rail-to-rail input stage of the OPA2343EA/2K5G4 behave near the supply rails?
The OPA2343EA/2K5G4 uses complementary N- and P-channel input pairs, creating a 400mV transition region near (V+) – 1.3V where both pairs conduct. Within this zone, PSRR, CMRR, and THD may degrade - so for highest precision, keep input signals outside (V+) – 1.8V to (V+) – 0.8V. Outside this region, performance matches datasheet specs.
Can the OPA2343EA/2K5G4 drive a 600Ω audio load directly?
Yes - the OPA2343EA/2K5G4's class AB output stage is explicitly rated to drive 600Ω loads connected anywhere between V+ and ground (per SBOS090A Applications Information). At 3.3V supply, it delivers >2.5VPP into 600Ω with <0.0007% THD+N at 1kHz, meeting professional line-driver standards.
What is the thermal resistance (θJA) of the OPA2343EA/2K5G4 in its VSSOP-8 package?
The OPA2343EA/2K5G4 in VSSOP-8 (DGK) package has a junction-to-ambient thermal resistance of 150°C/W, as specified in SBOS090A. This value assumes standard JEDEC 2-layer board conditions (2oz copper, 1in² pad). With proper thermal vias to inner ground planes, actual θJA can improve by 20–30% in production layouts.
OPA2343EA/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:
- 6V/µs
- Gain Bandwidth Product:
- 5.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 850µA (x2 Channels)
- Current - Output / Channel:
- 50 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
OPA2343EA/2K5G4 FAQ
1.How can I place an order for OPA2343EA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2343EA/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 OPA2343EA/2K5G4 reliable?
The price and inventory of OPA2343EA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2343EA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA2343EA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2343EA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2343EA/2K5G4?
OPA2343EA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2343EA/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 OPA2343EA/2K5G4?
For technical support, including OPA2343EA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2343EA/2K5G4 requirements.
6.How does Aetrix verify that OPA2343EA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA2343EA/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 OPA2343EA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA2343EA/2K5G4?
All OPA2343EA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2343EA/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 OPA2343EA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA2343EA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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