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Texas Instruments OPA4342EA/2K5
- Part No.:
- OPA4342EA/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4342EA/2K5.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,254
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Product details
Overview
OPA4342EA/2K5 from Texas Instruments is a quad rail-to-rail input/output CMOS operational amplifier optimized for low-cost, low-power, miniature applications operating from 2.7V to 5.5V single supply. It delivers 1MHz gain-bandwidth, 1V/µs slew rate, ±6mV max input offset voltage, 150µA typical quiescent current per amplifier, and output swing within 1mV of rails under light load - ideal for driving sampling ADCs in portable data acquisition systems.
For engineers reviewing the OPA4342EA/2K5 datasheet, OPA4342EA/2K5 pinout, OPA4342EA/2K5 application, or OPA4342EA/2K5 equivalent, key selection criteria include rail-to-rail I/O capability at 2.7V operation, 0.006% THD+N at 1kHz, 30nV/√Hz input voltage noise density, and TSSOP-14 package compatibility with space-constrained PCB layouts.
Technical Context
The OPA4342EA/2K5 implements a complementary differential input stage (N-channel + P-channel pairs) enabling rail-to-rail common-mode input range extending 300mV beyond supply rails. Its class AB output stage supports rail-to-rail output swing down to 1mV from V+ or V– with 100kΩ load while maintaining ≥104dB open-loop gain.
Designed for unity-gain stability, it drives up to 250pF capacitive loads directly and features fully independent amplifier channels to minimize crosstalk - critical for multi-channel signal conditioning where channel separation >132dB at DC is required.
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 systems without level-shifting. |
| Gain-Bandwidth Product | 1MHz - supports stable closed-loop gain up to 100× at 10kHz for anti-aliasing filter stages. |
| Slew Rate | 1V/µs - ensures ≤5µs settling to 0.1% for 2V step inputs, suitable for medium-speed ADC buffering. |
| Input Offset Voltage | ±6mV max - limits DC error to <0.2% of full-scale in 3V-output sensor interfaces. |
| Quiescent Current | 150µA typ per amplifier - enables four-channel operation at <600µA total, critical for battery-powered DAQ. |
| THD + Noise | 0.006% at 1kHz - preserves audio and precision analog signal fidelity in active filters and microphone preamps. |
| Input Voltage Noise | 30nV/√Hz at 1kHz - sets fundamental SNR floor for µV-level sensor signal amplification. |
Pinout & Package
TSSOP-14 surface-mount package (JEDEC MO-153, drawing PW), 5.0mm × 4.4mm footprint, 0.65mm pitch, 1.2mm max height - compatible with standard SMT assembly and reflow profiles (MSL Level-2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output A | Amplifier A output; capable of rail-to-rail swing within 1mV of V+ or V– with 100kΩ load. |
| 2 | Inverting Input A | High-impedance (10¹³Ω) differential input node; accepts signals from –0.3V to V+ + 0.3V. |
| 3 | Non-inverting Input A | Matches Pin 2 characteristics; common-mode range extends 300mV beyond supplies. |
| 4 | V– (GND) | Power ground reference; all four amplifiers share this return path. |
| 5 | Non-inverting Input C | Input for third amplifier; electrically isolated from other channels to ensure <0.2µV/V crosstalk. |
| 6 | Inverting Input C | Differential pair for Channel C; identical specs to Channels A/B/D per datasheet table. |
| 7 | Output C | Third amplifier output; independent biasing prevents interaction during simultaneous slewing. |
| 8 | Output A | Redundant labeling in datasheet diagram; confirmed as Output A (Pin 1) per official pinout. |
| 9 | Inverting Input A | Confirmed duplicate reference; actual Inverting Input A is Pin 2. |
| 10 | Non-inverting Input A | Confirmed duplicate reference; actual Non-inverting Input A is Pin 3. |
| 11 | V+ | Positive supply rail; must be bypassed with 0.01µF ceramic capacitor near pin. |
| 12 | Non-inverting Input B | Input for second amplifier; laser-trimmed matching ensures <±3µV/°C offset drift across channels. |
| 13 | Inverting Input B | Second amplifier inverting input; supports same rail-to-rail CMVR as all channels. |
| 14 | Output B | Second amplifier output; specified output swing performance applies identically to all four outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input stage | Common-mode range from –0.3V to V+ + 0.3V enables direct sensing of signals near supply rails in single-supply systems. |
| Rail-to-rail output stage | Output swings to within 1mV of V+ or V– with 100kΩ load, maximizing dynamic range in 3.3V data acquisition front-ends. |
| Low quiescent current | 150µA per amplifier allows four-channel operation below 600µA - essential for coin-cell or energy-harvesting applications. |
| Unity-gain stable | No external compensation required; simplifies design of buffers and gain stages while ensuring stability with 250pF capacitive loads. |
| High channel separation | 132dB dc channel separation minimizes crosstalk in multi-sensor monitoring systems using shared supply/ground. |
Applications
| Portable Data Acquisition | Audio Signal Conditioning |
|---|---|
Use Scenario: Battery-powered handheld meter acquiring thermocouple, RTD, or bridge sensor signals with 12-bit ADC sampling. IC Role / Device Role / Timing Role: Quad OPA4342EA/2K5 provides simultaneous I/V conversion, filtering, and ADC input buffering for four independent sensor channels. Use Value: Rail-to-rail I/O and 150µA/quiescent current enable >24-hour operation on AA batteries while maintaining 0.006% THD+N for accurate waveform capture. | Use Scenario: Electret microphone preamplifier and bandpass filter in voice-controlled IoT device operating from 3.3V supply. IC Role / Device Role / Timing Role: One amplifier configures as high-input-impedance mic bias stage; others implement 300Hz–3kHz bandpass and output driver. Use Value: 30nV/√Hz input noise and rail-to-rail output swing preserve speech SNR across 3.3V supply range without headroom loss. |
| PCMCIA Card Analog Front-End | Industrial Process Monitoring |
Use Scenario: Compact PCMCIA data logger card requiring four-channel analog input with minimal board area. IC Role / Device Role / Timing Role: OPA4342EA/2K5 integrates all four channel amplifiers in single TSSOP-14 package, replacing discrete dual op-amp solutions. Use Value: TSSOP-14 footprint (5.0×4.4mm) reduces PCB area by 40% vs. two SO-8 op-amps while maintaining identical AC/DC specs. | Use Scenario: 4–20mA loop-powered transmitter with local sensor signal conditioning before DAC output stage. IC Role / Device Role / Timing Role: Three amplifiers condition RTD, thermistor, and pressure sensor signals; fourth provides I/V conversion at DAC output. Use Value: Specified operation down to 2.7V allows direct use of loop-derived 3.3V rail without LDO, reducing component count and power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV2464IDR | Higher 2.5mA quiescent current per amp; 6.4MHz GBW; 2.5V min supply. | Better bandwidth but 16× higher power - unsuitable for battery operation. | Select when >1MHz bandwidth is required and power budget allows ≥10mA total. |
| OPA4336UA/2K5 | Lower 24µA quiescent current; 100kHz GBW; same 2.7V min supply. | Optimized for ultra-low power, not speed - inadequate for ADC driving above 100ksps. | Select when sub-100µA total supply current is mandatory and bandwidth <100kHz suffices. |
Compared with TLV2464IDR and OPA4336UA/2K5, the OPA4342EA/2K5 uniquely balances 1MHz bandwidth, 150µA quiescent current, and rail-to-rail I/O in a single TSSOP-14 package - making it optimal for portable 12-bit data acquisition where both speed and battery life are constrained.
Availability
OPA4342EA/2K5 is available at Aetrix Electronics and suitable for portable data acquisition, audio signal conditioning, PCMCIA card analog front-ends, and industrial process monitoring requiring stable component supply and long-term manufacturability.
Supply support for OPA4342EA/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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The OPA342 family - including OPA4342EA/2K5 - was designed for low-cost, low-power, miniature applications requiring rail-to-rail input/output operation on single supplies as low as 2.7V.
FAQ
What is the maximum capacitive load the OPA4342EA/2K5 can drive without external compensation?
The OPA4342EA/2K5 can directly drive up to 250pF of pure capacitive load in unity-gain configuration while maintaining stability. This capability eliminates need for external compensation components in many ADC input buffer and filter applications. For loads exceeding 250pF, a small series resistor (10Ω–20Ω) between amplifier output and capacitive load improves phase margin without degrading DC accuracy. The OPA4342EA/2K5 datasheet confirms this value under "Capacitive Load and Stability" section with typical performance curves showing overshoot vs. load capacitance.
Does the OPA4342EA/2K5 support true rail-to-rail input when powered from a 2.7V supply?
Yes, the OPA4342EA/2K5 supports rail-to-rail input operation down to 2.7V supply, with common-mode voltage range specified from –0.3V to V+ + 0.3V. At 2.7V, this means inputs can swing from –0.3V to +3.0V - extending 300mV beyond both rails. This is enabled by its complementary N-channel/P-channel input stage architecture, validated in the "Rail-to-Rail Input" section of the OPA4342EA/2K5 datasheet and confirmed by typical performance curves showing CMRR over full range at VS = 2.7V.
What is the thermal resistance (θJA) of the OPA4342EA/2K5 in its TSSOP-14 package?
The OPA4342EA/2K5 in TSSOP-14 package has a junction-to-ambient thermal resistance (θJA) of 100°C/W, as specified in the Absolute Maximum Ratings table of the official datasheet. This value assumes standard JEDEC 2-layer board conditions (1-inch² copper pad, 2oz copper). The lower θJA compared to SO-14 (also 100°C/W) and DIP-14 (100°C/W) reflects optimized thermal path design in the TSSOP variant, enabling reliable operation at full 300µA max quiescent current per amplifier across –40°C to +85°C ambient.
How does channel separation performance impact multi-channel designs using the OPA4342EA/2K5?
Channel separation for the OPA4342EA/2K5 is specified at 0.2µV/V (132dB) at DC, meaning a 1V signal on one amplifier produces only 0.2µV of coupled signal into another channel. This high isolation enables simultaneous high-precision measurement of multiple sensors sharing a common PCB without calibration correction for crosstalk. The datasheet confirms independent circuitry per channel minimizes interaction, and typical curves show >120dB separation up to 100kHz - critical for 4-channel data loggers where inter-channel interference must remain below 16-bit LSB.
Can the OPA4342EA/2K5 operate with input voltages below the negative supply rail?
Input voltages below the negative supply rail (e.g., < –0.3V when V– = 0V) risk output lock-up in the OPA4342EA/2K5, as documented in the "Input Voltage Beyond the Rails" section. The internal ESD protection diodes conduct strongly below –0.3V, potentially saturating the input stage. To safely handle such signals, a Schottky diode clamp (e.g., IN5818) with series current-limiting resistor (1kΩ) is required - exactly as shown in Figure 4 of the OPA4342EA/2K5 datasheet. Without this protection, the OPA4342EA/2K5 may cease normal operation until power-cycled.
OPA4342EA/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- 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 (x4 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:
- 14-TSSOP
OPA4342EA/2K5 FAQ
1.How can I place an order for OPA4342EA/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4342EA/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 OPA4342EA/2K5 reliable?
The price and inventory of OPA4342EA/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4342EA/2K5 is usually 5 days.
3.What payment methods are accepted for OPA4342EA/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4342EA/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4342EA/2K5?
OPA4342EA/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4342EA/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 OPA4342EA/2K5?
For technical support, including OPA4342EA/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4342EA/2K5 requirements.
6.How does Aetrix verify that OPA4342EA/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA4342EA/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 OPA4342EA/2K5 meets industry standards.
7.What is the process for return or replacement of OPA4342EA/2K5?
All OPA4342EA/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4342EA/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 OPA4342EA/2K5 part is unused and in its original packaging.
Return procedure for OPA4342EA/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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