My Inquiry
My Account
Texas Instruments OPA342UA/2K5
- Part No.:
- OPA342UA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA342UA/2K5.pdf
- Description:
- OPA342 - OPERATIONAL AMPLIFIER,
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA342UA/2K5 from Texas Instruments is a single-channel, rail-to-rail input/output CMOS operational amplifier optimized for low-power, single-supply operation from 2.7V to 5.5V. It delivers 1MHz gain-bandwidth, 1V/µs slew rate, and rail-to-rail output swing within 1mV of the rails (RL = 100kΩ), with only 150µA typical quiescent current. It is used in precision signal conditioning for data acquisition systems driving ADCs like the ADS7822.
For engineers reviewing the OPA342UA/2K5 datasheet, OPA342UA/2K5 pinout, OPA342UA/2K5 application, or OPA342UA/2K5 equivalent, key selection criteria include its 150µA quiescent current, rail-to-rail I/O capability at 2.7V supply, ±6mV max input offset voltage, 30nV/√Hz input voltage noise density, and SO-8 package compatibility with standard PCB layouts.
Technical Context
The OPA342UA/2K5 employs a complementary differential input stage enabling rail-to-rail common-mode input range extending 300mV beyond both supply rails. Its class AB output stage achieves rail-to-rail output swing while maintaining >96dB open-loop gain into 100kΩ loads.
It is unity-gain stable and specified across –40°C to +85°C. Input bias current is ultra-low (±0.2pA typ), and CMRR exceeds 74dB over full common-mode range at 5.5V supply - critical for high-accuracy DC-coupled sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V - supports direct interface with 3.3V and 5V logic, eliminating level-shifting needs. |
| Quiescent Current | 150µA typ - enables battery-powered designs with multi-year runtime (e.g., portable data loggers). |
| Gain-Bandwidth Product | 1MHz - sufficient for anti-aliasing filters and sensor amplification up to ~100kHz closed-loop bandwidth. |
| Slew Rate | 1V/µs - ensures faithful reproduction of 100kHz full-scale sine waves without distortion. |
| Input Offset Voltage | ±6mV max - maintains <0.1% error in 6V full-scale measurement systems without trimming. |
| THD + Noise | 0.006% at 1kHz - meets audio-grade signal integrity requirements in consumer electronics front-ends. |
| Output Swing (vs Rail) | 1mV (RL = 100kΩ) - maximizes dynamic range in low-voltage ADC driver applications (e.g., 12-bit ADS7822). |
Pinout & Package
OPA342UA/2K5 is housed in an 8-pin SOIC (SO-8) package per JEDEC MS-012, with thermal resistance θJA = 150°C/W. Pin 1 is marked by a beveled corner or dot.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (–In) | High-impedance node accepting feedback network; sensitive to layout parasitics above 100kHz. |
| 2 | Non-Inverting Input (+In) | Reference input for buffer/gain configurations; requires low-impedance source to avoid CMRR degradation. |
| 3 | Output (Out) | Capable of sourcing/sinking ±15mA; drives 600Ω loads rail-to-rail with minimal headroom loss. |
| 4 | Ground / Negative Supply (V–) | Return path for all internal bias currents; must connect directly to low-impedance ground plane. |
| 5 | NC | No internal connection - left unconnected; not to be tied to any potential. |
| 6 | NC | No internal connection - left unconnected; not to be tied to any potential. |
| 7 | Positive Supply (V+) | Power input requiring local 0.01µF ceramic decoupling to minimize PSRR degradation at high frequencies. |
| 8 | NC | No internal connection - left unconnected; not to be tied to any potential. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input range | Extends 300mV beyond both supply rails - enables direct sensing of signals near ground or VCC in single-supply systems. |
| Rail-to-rail output swing | Within 1mV of rails into 100kΩ - preserves full ADC input range and minimizes quantization loss. |
| Ultra-low input bias current | ±0.2pA typical - eliminates significant voltage error across high-impedance sources (>1MΩ) such as piezoelectric sensors. |
| Low THD + noise | 0.006% at 1kHz - supports high-fidelity audio pre-amplification without audible artifacts. |
| Unity-gain stability | Stable with no external compensation - simplifies design of buffers and gain stages without risk of oscillation. |
Applications
| ADC Driver for Portable Data Acquisition | Electret Microphone Preamplifier |
|---|---|
Use Scenario: Driving the ADS7822 12-bit sampling ADC in battery-powered environmental monitoring nodes. IC Role / Device Role / Timing Role: Precision buffer and gain stage that isolates ADC input capacitance and conditions analog sensor output before sampling. Use Value: 150µA quiescent current extends battery life; rail-to-rail output ensures full utilization of 0–VREF ADC input range under 2.7V supply. |
Use Scenario: Low-noise amplification of electret microphone output in voice-enabled IoT edge devices. IC Role / Device Role / Timing Role: First-stage transimpedance and gain amplifier providing 100× voltage gain with bandpass filtering (300Hz–3kHz). Use Value: 30nV/√Hz input voltage noise density preserves speech SNR; 0.006% THD+N prevents harmonic distortion in voice capture. |
| Single-Supply Active Filter | Process Control Signal Conditioning |
Use Scenario: 2nd-order Sallen-Key low-pass filter in handheld test equipment with 3.3V supply. IC Role / Device Role / Timing Role: Configured as unity-gain buffer and integrator core, rejecting power supply ripple via high PSRR. Use Value: 200µV/V PSRR at DC minimizes supply-induced baseline drift; rail-to-rail I/O accommodates full 0–3.3V filter response. |
Use Scenario: Isolating and scaling 4–20mA loop signals in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Precision I/V conversion stage converting loop current to 0–5V output referenced to system ground. Use Value: ±6mV max input offset ensures <0.12% full-scale error; 10¹³Ω input impedance prevents loading of current-source transmitters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6001T-E/OT | Lower GBW (1MHz same), higher IQ (100µA vs 150µA typ), but only 2.7V min supply; no rail-to-rail input. | Limited to non-rail-sensing applications; unsuitable for signals near V– in single-supply configs. | Select when ultra-low power dominates and input common-mode range stays >0.3V above V–. |
| TLV2461CDR | Higher IQ (550µA typ), wider supply range (2.7–6V), rail-to-rail I/O, but higher offset (±3mV typ) and noise (28nV/√Hz). | Better drive strength (30mA), suited for heavier loads; less optimal for micro-power sensor nodes. | Select when higher output current or tighter offset tolerance is required, and 400µA extra IQ is acceptable. |
Compared with MCP6001T-E/OT, OPA342UA/2K5 provides true rail-to-rail input operation essential for ground-referenced sensors, while TLV2461CDR trades 400µA higher quiescent current for improved output drive and lower offset - making OPA342UA/2K5 optimal for space-constrained, battery-powered signal chains where input voltage range and power are primary constraints.
Availability
OPA342UA/2K5 is available at Aetrix Electronics and suitable for portable data acquisition, electret microphone preamplification, and single-supply active filtering requiring stable component supply and long-term manufacturability.
Supply support for OPA342UA/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, embedded processing, and connectivity technologies, with decades of op amp innovation and broad industrial qualification.
The OPA342 series belongs to TI's MicroAmplifier™ portfolio, designed specifically for miniature, low-power, cost-sensitive applications demanding rail-to-rail performance on single supplies as low as 2.7V.
FAQ
What is the operating temperature range for OPA342UA/2K5?
The OPA342UA/2K5 is specified for operation from –40°C to +85°C, with extended operating range up to +125°C. All electrical parameters in the datasheet - including input offset voltage, CMRR, and quiescent current - are guaranteed across the –40°C to +85°C range, making OPA342UA/2K5 suitable for industrial and automotive cabin environments.
Does OPA342UA/2K5 support true rail-to-rail input and output?
Yes, OPA342UA/2K5 supports rail-to-rail input (common-mode range extends 300mV beyond both supply rails) and rail-to-rail output (within 1mV of rails into 100kΩ). This is achieved via complementary input pairs and a class AB output stage - confirmed in the SBOS106A datasheet Figures 1 and 2 - enabling full dynamic range utilization in 2.7V–5.5V single-supply systems.
Can OPA342UA/2K5 drive capacitive loads directly?
OPA342UA/2K5 can directly drive up to 250pF of pure capacitive load in unity-gain configuration without instability. For larger capacitive loads or improved phase margin, a 10Ω–20Ω series resistor between output and load (Figure 5 in SBOS106A) is recommended. This preserves DC accuracy while suppressing ringing - critical when driving ADC input capacitance or long PCB traces.
What is the maximum supply voltage rating for OPA342UA/2K5?
The absolute maximum supply voltage for OPA342UA/2K5 is 7.5V (V+ to V–), but the recommended operating range is 2.7V to 5.5V. Operation outside 2.7V–5.5V may cause parameter degradation or reduced reliability. The device is fully characterized and guaranteed only within the 2.7V–5.5V range, as stated in the SBOS106A datasheet "SPECIFICATIONS" table.
Is OPA342UA/2K5 pin-compatible with other OPA342 variants?
No - OPA342UA/2K5 uses an SO-8 package with two NC pins (pins 5, 6, 8), whereas the SOT23-5 variant (e.g., OPA342NA) has only five functional pins in a different physical layout. Pin compatibility exists only within the same package type (e.g., OPA342UA and OPA2342UA share SO-8 footprints), but not across package families. Always verify footprint against the SO-8 drawing 182.
OPA342UA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 1
- 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
- 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
OPA342UA/2K5 FAQ
1.How can I place an order for OPA342UA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA342UA/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 OPA342UA/2K5 reliable?
The price and inventory of OPA342UA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA342UA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA342UA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA342UA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA342UA/2K5?
OPA342UA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA342UA/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 OPA342UA/2K5?
For technical support, including OPA342UA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA342UA/2K5 requirements.
6.How does Aetrix verify that OPA342UA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA342UA/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 OPA342UA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA342UA/2K5?
All OPA342UA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA342UA/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 OPA342UA/2K5 part is unused and in its original packaging.
Return procedure for OPA342UA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA342UA/2K5 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
