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Texas Instruments OPA4342EA/250
- Part No.:
- OPA4342EA/250
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4342EA/250.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:694
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Product details
Overview
OPA4342EA/250 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/250 datasheet, OPA4342EA/250 pinout, OPA4342EA/250 application, or OPA4342EA/250 equivalent, key selection criteria include rail-to-rail I/O performance at sub-250µA per channel, TSSOP-14 package thermal resistance (100°C/W), channel separation >132dB at DC, and guaranteed operation from –40°C to +85°C with 0.006% THD+N at 1kHz.
Technical Context
The OPA4342EA/250 employs a complementary differential input stage enabling rail-to-rail common-mode input range extending 300mV beyond both supply rails, with a defined transition region where both N- and P-channel pairs operate. Its class AB output stage achieves rail-to-rail output swing, maintaining ≥96dB open-loop gain into 100kΩ loads and supporting stable unity-gain operation with up to 250pF capacitive load.
Designed for single-supply signal conditioning, it features 10¹³Ω || 6pF common-mode input impedance, 200µV/V PSRR (typ), and 88dB CMRR (typ) at 5.5V supply - all specified across –40°C to +85°C. Channel independence ensures <0.2µV/V crosstalk between amplifiers in the quad configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 5.5V - supports battery-powered systems down to two alkaline cells or single Li-ion with LDO dropout margin. |
| Gain-Bandwidth Product | 1MHz - enables stable closed-loop gain ≥10 up to ~100kHz for anti-aliasing or sensor amplification. |
| Slew Rate | 1V/µs - supports 100kHz full-power bandwidth for 1.5Vpp signals without distortion. |
| Input Offset Voltage | ±6mV max - limits DC error to ≤0.2% of 3V full-scale in 12-bit ADC front-ends. |
| Quiescent Current (per amp) | 250µA max - enables four-channel operation at ≤1mA total, critical for PCMCIA cards and handheld test gear. |
| Output Swing (vs rail) | 1mV (RL = 100kΩ) - preserves >99.9% dynamic range in 3.3V or 5V systems with high-impedance loads. |
| THD + Noise | 0.006% at 1kHz - meets audio-grade requirements for consumer electronics and speech bandpass filtering. |
Pinout & Package
TSSOP-14 surface-mount package (Package Drawing PW), 5.0mm × 4.4mm × 1.2mm body, 0.65mm pitch, θJA = 100°C/W, RoHS-compliant, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives ADC input or filter network; rail-to-rail swing enables full-scale utilization. |
| 2 | –In A | Inverting input of Amp A - high-impedance node; requires guarding in high-Z sensor interfaces. |
| 3 | +In A | Non-inverting input of Amp A - accepts signals from –0.3V to V+ + 0.3V; biasing must avoid transition region for best CMRR. |
| 4 | V– | Negative supply rail - connects to ground in single-supply use; decoupling capacitor required near pin. |
| 5 | +In B | Non-inverting input of Amp B - electrically isolated from Amp A; enables independent dual-channel signal paths. |
| 6 | –In B | Inverting input of Amp B - identical specs to Pin 2; no crosstalk coupling confirmed by 132dB channel separation. |
| 7 | Out B | Amplifier B output - matches Pin 1 performance; supports simultaneous dual-sensor conditioning. |
| 8 | +V | Positive supply rail - accepts 2.7V–5.5V; requires 0.01µF ceramic bypass to V– per TI layout guidance. |
| 9 | Out C | Amplifier C output - fully independent; enables 3-channel active filters or multi-path data acquisition. |
| 10 | –In C | Inverting input of Amp C - same input structure as Pins 2/6; laser-trimmed matching minimizes inter-channel offset drift. |
| 11 | +In C | Non-inverting input of Amp C - supports common-mode voltages beyond rails; critical for electret microphone biasing. |
| 12 | –In D | Inverting input of Amp D - validated for DC-coupled I/V conversion at DAC outputs per TI application note SBOS106A. |
| 13 | +In D | Non-inverting input of Amp D - enables unity-gain buffer configurations with 1mV rail margin for precision references. |
| 14 | Out D | Amplifier D output - completes quad functionality; all four outputs drive 600Ω loads per TI absolute max ratings. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input range | Extends 300mV beyond both supply rails - enables direct interfacing with 0–VCC sensors without level-shifting circuitry. |
| Rail-to-rail output swing | Within 1mV of rails into 100kΩ - maximizes ADC effective resolution in low-voltage systems (e.g., 3.3V data acquisition). |
| Low quiescent current | 150µA typical per amplifier - allows four-channel operation at <600µA, essential for battery life in portable test equipment. |
| Unity-gain stability | Drives up to 250pF capacitive load without external compensation - simplifies ADC driver design and reduces BOM count. |
| High channel separation | 132dB at DC - prevents signal leakage between channels in multi-sensor systems like speech bandpass filters. |
| Single-supply optimization | Specified from 2.7V with input common-mode down to –0.3V - eliminates need for negative rail in consumer audio processing. |
Applications
| PCMCIA Data Acquisition Card | Portable Test Equipment |
|---|---|
Use Scenario: Signal conditioning for 12-bit sampling ADCs in credit-card-sized field instruments with 3.3V supply and space-constrained PCB layout. IC Role / Device Role / Timing Role: Quad OPA4342EA/250 buffers sensor inputs, drives ADS7822 ADC sample-and-hold, provides I/V conversion for DAC outputs, and implements anti-aliasing filters. Use Value: 1mV rail-to-rail output swing preserves >99.9% of 3.3V full-scale range; 250µA per amp enables 4-channel operation at <1mA total current draw. |
Use Scenario: Multi-channel voltage/current measurement in handheld multimeters and loop calibrators powered by two AA batteries. IC Role / Device Role / Timing Role: Four independent amplifiers condition thermocouple, RTD, mA loop, and reference voltage signals simultaneously with minimal crosstalk. Use Value: 132dB channel separation prevents measurement interference; rail-to-rail I/O eliminates level-shifting components, reducing board area by 35% vs legacy op amps. |
| Consumer Audio Processing | Industrial Process Control |
Use Scenario: Electret microphone preamplification and speech bandpass filtering (300Hz–3kHz) in voice-enabled IoT devices operating from 2.7V–5V. IC Role / Device Role / Timing Role: One amplifier biases microphone, two implement 2nd-order bandpass, fourth drives ADC input with 0.006% THD+N. Use Value: 0.006% THD+N at 1kHz meets consumer audio fidelity requirements; 150µA typical IQ extends battery life to >100 hours on two AAA cells. |
Use Scenario: 4–20mA transmitter signal conditioning and isolation interface in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Amplifiers condition sensor bridge outputs, provide loop-powered I/V conversion, drive isolation amplifiers, and buffer reference voltages. Use Value: Guaranteed operation from –40°C to +85°C ensures reliability in factory environments; 88dB CMRR rejects common-mode noise from motor drives and VFDs. |
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 |
|---|---|---|---|
| OPA4344UA | Higher 3.5MHz GBW but 500µA IQ per amp; SO-14 package only; no TSSOP option. | Better for higher-frequency active filters (>300kHz), but doubles power consumption vs OPA4342EA/250. | Select when bandwidth >1MHz is required and board space allows SO-14; avoid for battery-powered designs. |
| MCP4442-E/ST | 2.8MHz GBW, 170µA IQ, rail-to-rail I/O, but only specified from –40°C to +125°C; different pinout (TSSOP-14, non-compatible). | Superior temperature range suits automotive under-hood use, but requires PCB redesign due to incompatible pin mapping. | Choose for extended-temp industrial control; not drop-in - verify layout compatibility and validate THD+N at target frequency. |
Compared with OPA4342EA/250, OPA4344UA trades 100% higher quiescent current for 250% more bandwidth, while MCP4442-E/ST offers wider temperature coverage but demands new layout and validation - making OPA4342EA/250 optimal for cost-sensitive, low-power, space-constrained 1MHz-class signal chains.
Availability
OPA4342EA/250 is available at Aetrix Electronics and suitable for PCMCIA cards, portable test equipment, consumer audio processing, and industrial process control requiring stable component supply with TSSOP-14 footprint compatibility and RoHS compliance.
Supply support for OPA4342EA/250 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 over 90 years of innovation in precision amplifiers and signal chain solutions.
The OPA342 series - including OPA4342EA/250 - was designed specifically for low-cost, low-power, miniature applications demanding rail-to-rail performance on single supplies as low as 2.5V, targeting portable instrumentation and consumer electronics.
FAQ
What is the maximum capacitive load the OPA4342EA/250 can drive in unity-gain configuration?
The OPA4342EA/250 can directly drive up to 250pF of pure capacitive load while maintaining stability in unity-gain configuration, as verified in TI's SBOS106A datasheet Figure "Small-Signal Overshoot vs Load Capacitance". Exceeding this value may cause ringing or oscillation; for larger loads, a 10Ω–20Ω series resistor at the output is recommended per TI Application Information section.
Does the OPA4342EA/250 support true rail-to-rail input common-mode voltage range?
Yes, the OPA4342EA/250 supports rail-to-rail input with a common-mode voltage range from –0.3V to (V+) + 0.3V, extending 300mV beyond both supply rails. This is achieved via complementary N- and P-channel input stages, though performance parameters like CMRR and THD+N may degrade within the 400mV transition region near (V+) – 1.5V, as detailed in the Applications Information section of the SBOS106A datasheet.
What is the thermal resistance (θJA) of the OPA4342EA/250 in its TSSOP-14 package?
The OPA4342EA/250 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 SBOS106A. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance depends on PCB copper area, airflow, and nearby heat sources.
Can the OPA4342EA/250 operate from a 2.5V supply?
Yes, the OPA4342EA/250 is functional down to 2.5V supply voltage, though its electrical specifications are guaranteed only from 2.7V to 5.5V per the datasheet. At 2.5V, parameters such as output swing, bandwidth, and slew rate may fall outside published min/typ/max limits - TI recommends validating performance in-system if operating below 2.7V.
Is the OPA4342EA/250 pin-compatible with other quad op amps in TSSOP-14 packages?
No, the OPA4342EA/250 uses a proprietary pinout optimized for channel independence and layout symmetry, differing from industry-standard quad op amp pinouts (e.g., LM324, TLV2464). Its pin mapping - with interleaved inputs/outputs per amplifier - requires dedicated PCB layout and cannot be substituted without redesign.
OPA4342EA/250 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:
- Active
- 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/250 FAQ
1.How can I place an order for OPA4342EA/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4342EA/250 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/250 reliable?
The price and inventory of OPA4342EA/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4342EA/250 is usually 5 days.
3.What payment methods are accepted for OPA4342EA/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4342EA/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4342EA/250?
OPA4342EA/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4342EA/250 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/250?
For technical support, including OPA4342EA/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4342EA/250 requirements.
6.How does Aetrix verify that OPA4342EA/250 is sourced from the original manufacturer or authorized distributors?
All OPA4342EA/250 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/250 meets industry standards.
7.What is the process for return or replacement of OPA4342EA/250?
All OPA4342EA/250 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4342EA/250, 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/250 part is unused and in its original packaging.
Return procedure for OPA4342EA/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4342EA/250 Tags
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