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Texas Instruments OPA2340UA/2K5G4
- Part No.:
- OPA2340UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2340UA/2K5G4.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,616
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Product details
Overview
OPA2340UA/2K5G4 from Texas Instruments is a dual-channel, rail-to-rail input/output CMOS operational amplifier optimized for single-supply, low-voltage operation (2.7 V to 5.5 V). It delivers 5.5 MHz gain-bandwidth, 6 V/µs slew rate, and output swing within 1 mV of rails under 100-kΩ load - enabling high-fidelity signal conditioning in A/D converter driver and audio front-end applications.
For engineers reviewing the OPA2340UA/2K5G4 datasheet, OPA2340UA/2K5G4 pinout, OPA2340UA/2K5G4 application, or OPA2340UA/2K5G4 equivalent, key selection criteria include rail-to-rail I/O performance at 2.7–5.5 V supply, dual-channel independence for low crosstalk, 750 µA/channel quiescent current, and SOIC-8 package compatibility with space-constrained analog signal chains.
Technical Context
The OPA2340UA/2K5G4 implements a complementary N/P-channel input stage enabling rail-to-rail input common-mode range extending 500 mV beyond both supply rails. Its class AB output stage achieves rail-to-rail output swing with <1 mV headroom at light loads and maintains >106 dB open-loop gain up to 10 kΩ load.
It operates as a unity-gain stable voltage-feedback amplifier with no shutdown or enable control. The dual-channel architecture features completely independent circuitry - eliminating inter-channel interaction and ensuring channel separation >120 dB at DC and >100 dB at 10 kHz - critical for precision dual-signal paths like stereo audio or differential sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 5.5 V - supports direct interface with 3.3 V and 5 V logic/system rails without level shifting |
| Gain-Bandwidth Product | 5.5 MHz - enables stable closed-loop gain ≥10 up to ~500 kHz for anti-aliasing filter design |
| Slew Rate | 6 V/µs - ensures <1 µs 0.1% settling for 2-V step, suitable for 100-kSPS data acquisition |
| Input Offset Voltage | ±150 µV (typ) - minimizes DC error in precision I/V conversion and sensor amplification |
| Quiescent Current | 750 µA per channel - allows dual-channel operation at <1.5 mA total, ideal for battery-powered instrumentation |
| Output Swing | Within 1 mV of rails (RL ≥100 kΩ) - maximizes dynamic range in 0–5 V ADC input drive applications |
| THD + Noise | 0.0007% at 1 kHz - meets fidelity requirements for audio preamplifier and communication channel stages |
Pinout & Package
OPA2340UA/2K5G4 is packaged in an 8-pin SOIC (D package), 4.90 mm × 3.91 mm body size, surface-mount format rated for –40°C to 85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load or next-stage input; rail-to-rail capable |
| 2 | –IN A | Inverting input for channel A - accepts feedback network or signal source in inverting configuration |
| 3 | +IN A | Noninverting input for channel A - connects to reference, sensor, or signal source in noninverting mode |
| 4 | V– | Negative supply terminal - tied to ground in single-supply systems; establishes common reference |
| 5 | +IN B | Noninverting input for channel B - electrically isolated from channel A; enables dual-path signal processing |
| 6 | –IN B | Inverting input for channel B - supports independent feedback and gain setting per channel |
| 7 | OUT B | Amplifier B output - fully independent output node; no shared internal nodes with OUT A |
| 8 | V+ | Positive supply terminal - accepts 2.7–5.5 V; bypassing with 0.1 µF ceramic capacitor required |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Common-mode range extends 500 mV below V– and 500 mV above V+ - enables direct sensing of signals near supply rails (e.g., 0–5 V sensor outputs) |
| Rail-to-rail output | Swings to within 1 mV of V– and V+ with 100-kΩ load - preserves full-scale resolution when driving 12-bit ADCs like ADS7816 |
| Low quiescent current | 750 µA per channel at 5 V - supports dual-channel signal conditioning in power-sensitive portable equipment |
| High-speed performance | 5.5 MHz GBW and 6 V/µs slew rate - sustains fidelity for 100-kHz sampling systems and audio bandpass filtering |
| Channel independence | No shared bias or output circuitry between channels - eliminates crosstalk in stereo audio or differential sensor pairs |
Applications
| Audio Line Driver | Data Acquisition Front-End |
|---|---|
Use Scenario: Driving balanced/unbalanced line-level signals from microcontrollers or CODECs into consumer audio inputs. IC Role / Device Role / Timing Role: Dual-channel noninverting buffer with rail-to-rail I/O, providing gain = 1 and impedance transformation. Use Value: 0.0007% THD+N at 1 kHz and 5.5 MHz bandwidth preserve stereo channel fidelity without added noise or distortion. | Use Scenario: Conditioning analog sensor outputs (e.g., thermistor, strain gauge) prior to sampling by 12-bit ADCs such as ADS7816. IC Role / Device Role / Timing Role: Precision dual-channel amplifier with ±150 µV offset and rail-to-rail output, driving ADC input capacitance while rejecting supply noise. Use Value: Output swing within 1 mV of rails maximizes usable ADC input range; 750 µA/channel enables low-power multichannel DAQ systems. |
| Process Control Signal Conditioning | PCMCIA Card Analog Interface |
Use Scenario: Isolating and scaling 4–20 mA loop signals or industrial sensor voltages (0–10 V) for PLC analog input modules. IC Role / Device Role / Timing Role: Dual op-amp performing I/V conversion and level-shifting in single-supply 5 V systems. Use Value: Rail-to-rail input accommodates 0 V to >5 V input transients; 80–92 dB CMRR rejects common-mode noise on long industrial cables. | Use Scenario: Providing programmable gain and buffering for analog functions in PCMCIA cards used in portable test equipment. IC Role / Device Role / Timing Role: Dual low-power amplifier in space-constrained SOIC-8 footprint, supporting hot-plug compatible analog I/O. Use Value: 3.0 mm × 3.0 mm VSSOP alternative available (OPA2340DGK); SOIC-8 version offers proven manufacturability and thermal reliability (RθJA = 138.4°C/W). |
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 |
|---|---|---|---|
| OPA2340UA | Same silicon, identical electrical specs; differs only in tape-and-reel packaging (2K5 vs. standard reel) | No functional difference - same PCB layout, thermal, and electrical behavior | Select OPA2340UA/2K5G4 for automated SMT assembly requiring 2,500-unit reels with G4 moisture sensitivity level compliance |
| MCP6022-I/SN | Lower GBW (10 MHz), higher IQ (1 mA/channel), wider supply (2.7–6.0 V), but no guaranteed 1-mV rail-to-rail output swing | Acceptable for general-purpose dual op-amp use but not validated for precision ADC driver applications requiring sub-mV headroom | Choose only if higher bandwidth is prioritized over guaranteed rail-to-rail output fidelity and ultra-low distortion |
Compared with OPA2340UA/2K5G4, the OPA2340UA offers identical performance in a different reel configuration, while MCP6022-I/SN trades guaranteed rail-to-rail output and lower THD for marginally higher bandwidth and broader supply range - making OPA2340UA/2K5G4 the preferred choice for precision, low-distortion, single-supply signal chain stages.
Availability
OPA2340UA/2K5G4 is available at Aetrix Electronics and suitable for audio line drivers, data acquisition front-ends, and process control signal conditioning requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for OPA2340UA/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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The OPAx340 product line was designed specifically for single-supply, rail-to-rail signal conditioning in portable and space-constrained systems - targeting A/D converter driving, audio processing, and sensor interface applications where dynamic range and low power are critical.
FAQ
What is the operating supply voltage range for the OPA2340UA/2K5G4?
The OPA2340UA/2K5G4 operates from 2.7 V to 5.5 V, with full specifications guaranteed from 2.7 V to 5 V. It functions down to 2.5 V but with reduced performance margins. This range supports direct integration with 3.3 V and 5 V system rails without external regulation, and its rail-to-rail I/O ensures full utilization of the available voltage window in OPA2340UA/2K5G4-based designs.
Does the OPA2340UA/2K5G4 support true rail-to-rail output swing?
Yes - the OPA2340UA/2K5G4 delivers output voltage swing within 1 mV of both supply rails (V– and V+) when loaded with ≥100 kΩ, and within 10 mV with 10 kΩ loads. This is verified across temperature (–40°C to 85°C) and supply (2.7–5.5 V), making OPA2340UA/2K5G4 suitable for driving 12-bit ADCs like ADS7816 where maximizing input dynamic range is essential.
What is the input common-mode voltage range of the OPA2340UA/2K5G4?
The OPA2340UA/2K5G4 features a rail-to-rail input stage with common-mode range extending 500 mV beyond both supply rails: from (V– – 0.5 V) to (V+ + 0.5 V). This allows direct interfacing with signals that exceed the supply, such as sensor outputs or DACs with extended headroom - a capability confirmed in the OPA2340UA/2K5G4 datasheet's Electrical Characteristics table under VCM specification.
How does channel separation perform in the OPA2340UA/2K5G4?
OPA2340UA/2K5G4 provides >120 dB DC channel separation and >100 dB at 10 kHz due to fully independent internal circuitry per channel - no shared bias current sources, current mirrors, or output stages. This eliminates crosstalk in dual-path applications like stereo audio or differential sensor amplification, and is explicitly documented in the OPA2340UA/2K5G4 Typical Characteristics section (Figure 4: Channel Separation vs Frequency).
Is the OPA2340UA/2K5G4 unity-gain stable?
Yes - the OPA2340UA/2K5G4 is internally compensated for unity-gain stability across its full operating conditions. It maintains phase margin >60° with capacitive loads up to 1000 pF in unity-gain configuration, as validated in the OPA2340UA/2K5G4 datasheet Figure 21 (Small-Signal Overshoot vs Load Capacitance) and Application section 7.3.4. No external compensation is required for stable operation at G = 1.
OPA2340UA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 150 µV
- Current - Supply:
- 750µA (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-SOIC
OPA2340UA/2K5G4 FAQ
1.How can I place an order for OPA2340UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2340UA/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 OPA2340UA/2K5G4 reliable?
The price and inventory of OPA2340UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2340UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA2340UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2340UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2340UA/2K5G4?
OPA2340UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2340UA/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 OPA2340UA/2K5G4?
For technical support, including OPA2340UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2340UA/2K5G4 requirements.
6.How does Aetrix verify that OPA2340UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA2340UA/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 OPA2340UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA2340UA/2K5G4?
All OPA2340UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2340UA/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 OPA2340UA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA2340UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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