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Texas Instruments OPA2342UA/2K5
- Part No.:
- OPA2342UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2342UA/2K5.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:12,327
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Product details
Overview
OPA2342UA/2K5 from Texas Instruments is a dual rail-to-rail input/output CMOS operational amplifier optimized for low-power, single-supply operation down to 2.7V. It delivers 1MHz gain-bandwidth, 1V/µs slew rate, and rail-to-rail output swing within 1mV of supply rails under light loads - enabling high dynamic range signal conditioning in battery-powered data acquisition and audio processing systems.
For engineers reviewing the OPA2342UA/2K5 datasheet, OPA2342UA/2K5 pinout, OPA2342UA/2K5 application, or OPA2342UA/2K5 equivalent, key selection criteria include quiescent current (150µA typ per amplifier), input bias current (±0.2pA typ), THD+N (0.006% at 1kHz), offset voltage (±1mV typ), and SO-8 package compatibility with standard PCB layouts for dual op-amp signal chains.
Technical Context
The OPA2342UA/2K5 employs complementary N-channel and P-channel input differential pairs to achieve rail-to-rail input common-mode range extending 300mV beyond both supply rails. Its class AB output stage enables rail-to-rail output swing while maintaining ≥96dB open-loop gain into 100kΩ loads.
This dual-channel architecture features completely independent circuitry per amplifier - ensuring minimal crosstalk (<0.2µV/V dc channel separation) and no interaction between channels, critical for precision dual-path signal conditioning in ADC driver and active filter applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V - supports direct integration into 3.3V and 5V systems without level-shifting. |
| Quiescent Current (per amp) | 150µA typ - enables ultra-low-power operation in always-on sensor interfaces and portable equipment. |
| Input Offset Voltage | ±1mV typ - ensures <10mV total error in unity-gain buffers driving 12-bit ADCs with 5V full-scale range. |
| Gain-Bandwidth Product | 1MHz - sufficient for closed-loop gains up to 100 at 10kHz while maintaining phase margin >45°. |
| Slew Rate | 1V/µs - supports clean 10kHz full-scale sine output with <1% distortion into 10kΩ loads. |
| THD + Noise | 0.006% at 1kHz - meets audio-grade requirements for microphone preamplifiers and consumer audio line drivers. |
| Input Bias Current | ±0.2pA typ - allows use with high-impedance sources (e.g., piezoelectric sensors, pH electrodes) without significant DC error. |
Pinout & Package
OPA2342UA/2K5 is packaged in an 8-pin SOIC (SO-8) surface-mount package with standard JEDEC MS-012AC footprint (5.3mm × 6.2mm), compatible with automated assembly and IPC-7351B land patterns.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Channel A) | High-impedance node accepting differential feedback; rail-to-rail common-mode range extends −0.3V to V+ +0.3V. |
| 2 | Non-Inverting Input (Channel A) | High-impedance node for reference or signal injection; same rail-to-rail input capability as Pin 1. |
| 3 | Output (Channel A) | Class AB output capable of swinging within 1mV of V+ or V− when loaded >100kΩ; drives 600Ω loads. |
| 4 | V− (Ground or Negative Supply) | Power return path; must be decoupled with 0.01µF ceramic capacitor near pin for stability. |
| 5 | V+ (Positive Supply) | Primary power rail; accepts 2.7V–5.5V; requires local 0.01µF ceramic bypass to ground. |
| 6 | Non-Inverting Input (Channel B) | Independent high-impedance input for second signal path; identical specs and rail-to-rail behavior as Pin 2. |
| 7 | Inverting Input (Channel B) | Independent high-impedance input for second feedback path; matches Pin 1 performance and range. |
| 8 | Output (Channel B) | Second fully independent output; maintains >132dB channel separation at dc and >100dB at 1kHz. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input | Common-mode range extends 300mV beyond both supply rails - maximizes usable input voltage headroom in low-voltage systems. |
| Rail-to-rail output | Swings within 1mV of supply rails into 100kΩ - preserves full dynamic range for ADC inputs and DAC I/V conversion. |
| Ultra-low quiescent current | 150µA per amplifier - enables multi-channel signal conditioning in energy-constrained IoT nodes and wearable devices. |
| Unity-gain stable | No external compensation required - simplifies design of buffers, active filters, and gain stages across all closed-loop configurations. |
| Low THD+N | 0.006% at 1kHz - meets Class D audio preamp and speech bandpass filter requirements without post-processing. |
| Independent dual amplifiers | No crosstalk-induced interaction - supports simultaneous analog front-end paths for stereo audio or differential sensor readout. |
Applications
| Audio Processing | Data Acquisition |
|---|---|
|
Use Scenario: Electret microphone preamplification and bandpass filtering in voice-enabled edge devices operating from 2.7V–5V supplies. IC Role / Device Role / Timing Role: Dual-channel signal conditioner: Channel A provides 100× gain, Channel B implements 300Hz–3kHz bandpass response. Use Value: Achieves <500µA total system quiescent current while delivering SNR >70dB and THD+N <0.01% across speech band. |
Use Scenario: Driving ADS7822 12-bit sampling ADC in portable instrumentation with micro-power constraints. IC Role / Device Role / Timing Role: Buffer and gain stage isolating ADC input capacitance and charge injection transients during sample-and-hold cycles. Use Value: Enables accurate 12-bit conversion at 50ksps with <0.5LSB integral nonlinearity error due to rail-to-rail output swing and low offset drift. |
| Active Filters | Process Control |
|
Use Scenario: 2nd-order Sallen-Key low-pass filter in sensor signal conditioning for industrial temperature monitoring. IC Role / Device Role / Timing Role: Dual op-amp implementing unity-gain buffer and filter transfer function with matched internal components. Use Value: Maintains filter cutoff accuracy ±0.5% over −40°C to +85°C due to low input bias current (±0.2pA) and minimal offset drift (±3µV/°C). |
Use Scenario: 4–20mA transmitter output stage and sensor excitation in loop-powered field instruments. IC Role / Device Role / Timing Role: Precision I/V converter generating 0–5V output from current loop; second channel conditions RTD bridge signal. Use Value: Delivers 0.1% FSR accuracy over temperature using rail-to-rail output and <1mV offset - eliminating need for trimming resistors. |
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 |
|---|---|---|---|
| MCP6022-I/SN | Higher quiescent current (1mA vs 150µA), lower GBW (10MHz), higher input bias current (1pA vs 0.2pA). | Better high-frequency performance but unsuitable for sub-500µA battery life targets. | Select when bandwidth >5MHz is required and power budget allows >1mA per channel. |
| TLV2462IDR | Lower quiescent current (23µA), lower slew rate (0.6V/µs), reduced output drive (±8mA vs ±15mA). | Optimized for ultra-low-power sensor interfaces where speed <100kHz suffices. | Select when system-level current budget is <100µA per channel and 10kHz bandwidth is adequate. |
Compared with MCP6022-I/SN and TLV2462IDR, OPA2342UA/2K5 uniquely balances 1MHz bandwidth, 1V/µs slew rate, and 150µA quiescent current - making it optimal for dual-channel, battery-powered data acquisition where both speed and efficiency are constrained.
Availability
OPA2342UA/2K5 is available at Aetrix Electronics and suitable for audio processing, data acquisition, active filter, process control, and consumer electronics applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for OPA2342UA/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 expertise in precision op-amps and signal chain solutions.
The OPA2342UA/2K5 belongs to TI's MicroAmplifier™ series, designed specifically for low-cost, low-power, miniature applications demanding rail-to-rail performance in space-constrained and energy-sensitive systems.
FAQ
What is the maximum operating supply voltage for OPA2342UA/2K5?
The absolute maximum supply voltage for OPA2342UA/2K5 is 7.5V between V+ and V− pins. However, the device is fully specified and guaranteed only from 2.7V to 5.5V. Operation above 5.5V may cause parametric degradation or reliability risk and is not recommended for production designs.
Does OPA2342UA/2K5 support true rail-to-rail input and output simultaneously?
Yes, OPA2342UA/2K5 supports rail-to-rail input common-mode range (−0.3V to V+ +0.3V) and rail-to-rail output swing (within 1mV of rails into 100kΩ). This enables full-scale signal handling in single-supply 3.3V systems without level-shifting circuitry.
Can OPA2342UA/2K5 drive capacitive loads directly?
OPA2342UA/2K5 can directly drive up to 250pF in unity-gain configuration. For larger capacitive loads, a 10Ω–20Ω series resistor at the output improves stability without degrading DC accuracy - as verified in TI's SBOS106A datasheet Figure 5.
What is the thermal resistance (θJA) of the SO-8 package used by OPA2342UA/2K5?
The SO-8 package for OPA2342UA/2K5 has a junction-to-ambient thermal resistance (θJA) of 150°C/W under standard JEDEC test conditions (2squares, 1oz copper, 1 layer), as specified in the SBOS106A datasheet on page 3.
Is OPA2342UA/2K5 suitable for driving ADC inputs like the ADS7822?
Yes, OPA2342UA/2K5 is explicitly optimized for driving sampling ADCs such as the ADS7822. TI's SBOS106A datasheet shows validated reference designs (Figures 6 and 7) demonstrating low-noise, low-distortion buffering with <500µA total quiescent current in 2.7V–5V systems.
OPA2342UA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 150µA (x2 Channels)
- Current - Output / Channel:
- 15 mA
- Voltage - Supply Span (Min):
- 2.7 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
OPA2342UA/2K5 FAQ
1.How can I place an order for OPA2342UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2342UA/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 OPA2342UA/2K5 reliable?
The price and inventory of OPA2342UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2342UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA2342UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2342UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2342UA/2K5?
OPA2342UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2342UA/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 OPA2342UA/2K5?
For technical support, including OPA2342UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2342UA/2K5 requirements.
6.How does Aetrix verify that OPA2342UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA2342UA/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 OPA2342UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA2342UA/2K5?
All OPA2342UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2342UA/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 OPA2342UA/2K5 part is unused and in its original packaging.
Return procedure for OPA2342UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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