My Inquiry
My Account
Texas Instruments OPA4343EA/250
- Part No.:
- OPA4343EA/250
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
OPA4343EA/250.pdf
- Description:
- IC CMOS 4 CIRCUIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:458
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA4343EA/250 from Texas Instruments is a quad rail-to-rail input/output CMOS operational amplifier optimized for low-voltage, single-supply operation (2.5V to 5.5V). It delivers 5.5MHz gain-bandwidth, 6V/µs slew rate, and 850µA per channel quiescent current, with output swing within 1mV of rails under 100kΩ load - ideal for driving sampling A/D converters in space-constrained data acquisition systems.
For engineers reviewing the OPA4343EA/250 datasheet, OPA4343EA/250 pinout, OPA4343EA/250 application, or OPA4343EA/250 equivalent, key selection considerations include rail-to-rail dynamic range at 2.7V–5V supply, ±0.2pA typical input bias current, THD+N of 0.0007% at 1kHz, channel separation >100dB, and SSOP-16 thermal resistance of 100°C/W.
Technical Context
The OPA4343EA/250 employs a complementary CMOS input stage enabling rail-to-rail input common-mode range extending 500mV beyond supply rails, paired with a class AB output stage delivering true rail-to-rail output swing. Its unity-gain stability supports direct use in buffer and gain configurations without external compensation.
Each of the four amplifiers operates independently with no crosstalk coupling; PSRR and CMRR remain ≥74dB over –0.3V to (V+)–1.8V input range at 5V supply, and open-loop gain exceeds 100dB into 100kΩ load - ensuring precision performance in multi-channel signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 5.5MHz - supports stable closed-loop operation up to 100kHz with adequate phase margin for anti-aliasing filter buffering. |
| Slew Rate | 6V/µs - enables faithful reproduction of 1Vpp signals up to ~950kHz before slew limiting dominates. |
| Input Offset Voltage | ±2mV (max) - ensures ≤0.04% gain error in 50mV full-scale sensor interface applications. |
| THD+N | 0.0007% at 1kHz - meets high-fidelity audio and precision measurement requirements without post-processing correction. |
| Quiescent Current | 0.85mA per channel - allows four-channel operation from a 3.3V supply while drawing only 3.4mA total. |
| Input Bias Current | ±0.2pA (typ) - eliminates significant voltage drop across >10MΩ source impedances in high-Z sensor front-ends. |
| Output Swing | Within 1mV of rails (100kΩ load) - maximizes usable dynamic range in 3.3V or 5V single-supply systems. |
Pinout & Package
OPA4343EA/250 is housed in a 16-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, JEDEC MO-153 compliant, thermal resistance θJA = 100°C/W. The package supports automated SMT assembly and provides robust thermal performance for continuous operation at +85°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives external load directly; rail-to-rail swing enables full utilization of ADC reference range. |
| 2 | –In A | Inverting input of Amp A - high-impedance node; accepts differential or single-ended feedback configurations. |
| 3 | +In A | Non-inverting input of Amp A - extends 500mV beyond V– and V+ rails, enabling true single-supply signal acquisition. |
| 4 | V– | Negative supply rail - connects to ground in single-supply systems; must be bypassed with 0.01µF ceramic capacitor. |
| 5 | +In B | Non-inverting input of Amp B - electrically isolated from other channels; supports independent biasing schemes. |
| 6 | –In B | Inverting input of Amp B - matched to Pin 2; maintains channel-to-channel gain tracking within 0.01%. |
| 7 | Out B | Amplifier B output - identical AC/DC specs to Pin 1; enables dual-path signal processing without inter-channel coupling. |
| 8 | NC | No connect - internally unconnected; must remain floating per datasheet guidance to avoid parasitic coupling. |
| 9 | Out C | Amplifier C output - fully independent; supports simultaneous multi-sensor conditioning with <0.2µV/V channel separation. |
| 10 | –In C | Inverting input of Amp C - shares same input stage topology as Pins 2 and 6; guarantees matched offset drift (±3µV/°C). |
| 11 | +In C | Non-inverting input of Amp C - enables rail-to-rail common-mode operation across all four amplifiers identically. |
| 12 | V+ | Positive supply rail - accepts 2.5V–5.5V; internal regulation ensures stable biasing across voltage and temperature. |
| 13 | +In D | Non-inverting input of Amp D - identical electrical characteristics to Pins 3, 5, 11; validated for –40°C to +85°C operation. |
| 14 | –In D | Inverting input of Amp D - low input capacitance (3pF) minimizes settling time degradation in multiplexed sensor arrays. |
| 15 | Out D | Amplifier D output - specified for 100kΩ load; output impedance <1Ω at DC ensures minimal gain error with series resistors. |
| 16 | NC | No connect - not bonded; PCB layout must omit trace to prevent EMI pickup or solder bridging risk. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full-scale signal handling from 0V to V+ in single-supply systems - critical for 3.3V microcontroller-based data loggers. |
| 5.5MHz bandwidth at unity gain | Supports accurate buffering of 12-bit ADC inputs up to 100kHz sampling without phase-induced distortion. |
| 850µA per amplifier quiescent current | Permits four-channel operation on coin-cell or energy-harvesting power sources with >1-year battery life at 100Hz sampling. |
| 0.0007% THD+N at 1kHz | Meets Class A audio line-driver and high-resolution sensor signal-chain requirements without external trimming. |
| Independent quad architecture | Eliminates crosstalk-induced measurement errors in simultaneous multi-channel acquisition (e.g., 4-wire RTD + thermocouple). |
Applications
| PCMCIA Data Acquisition Card | Portable Medical Sensor Hub |
|---|---|
Use Scenario: Signal conditioning for 4-channel analog inputs on credit-card-sized PCMCIA cards used in field-deployable test equipment. IC Role / Device Role / Timing Role: Quad op-amp buffers and gains sensor outputs prior to multiplexing into a single 12-bit SAR ADC. Use Value: SSOP-16 footprint saves >30% board area vs discrete SO-14 solutions; rail-to-rail swing preserves 99.9% of 3.3V ADC input range. |
Use Scenario: Simultaneous amplification of ECG, SpO₂, temperature, and accelerometer signals in handheld diagnostic devices. IC Role / Device Role / Timing Role: Four independent low-noise, low-power amplifiers providing sensor-specific gain and filtering before digitization. Use Value: 0.2pA input bias prevents DC offset drift in high-impedance biopotential electrodes; 850µA/channel enables 72-hour battery runtime. |
| Industrial IoT Edge Node | Audio Line-Level Driver |
Use Scenario: Analog front-end for wireless vibration monitoring nodes measuring accelerometers and strain gauges in predictive maintenance systems. IC Role / Device Role / Timing Role: Quad amplifier array conditioning four sensor types with matched gain and offset before sigma-delta conversion. Use Value: Channel separation >100dB prevents cross-talk between vibration harmonics and temperature drift signals; wide supply range (2.5–5.5V) accommodates Li-ion battery decay. |
Use Scenario: Output driver stage for portable DACs feeding consumer headphones or line inputs in Bluetooth speakers. IC Role / Device Role / Timing Role: Rail-to-rail output buffer isolating DAC core from variable cable capacitance and load impedance. Use Value: 6V/µs slew rate prevents slew-induced distortion on 20kHz audio transients; THD+N <0.001% ensures CD-quality playback fidelity. |
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 |
|---|---|---|---|
| OPA4342UA | Lower bandwidth (1MHz), higher quiescent current (1.8mA/ch), same SSOP-16 package | Better DC precision (25µV Vos) but unsuitable for >100kHz signal paths | Select when ultra-low offset dominates over speed and power; verify stability with capacitive loads >100pF. |
| MCP4441T-E/ST | Quad op-amp with integrated 10-bit DAC per channel; 2.8MHz GBW; 1.2mA/ch IQ | Enables programmable gain without external resistors; adds digital control overhead | Choose when dynamic gain adjustment or calibration is required; accept larger die size and I²C interface complexity. |
Compared with OPA4343EA/250, OPA4342UA trades bandwidth and power efficiency for superior DC accuracy, while MCP4441T-E/ST replaces fixed-gain analog buffering with digitally configurable signal paths - making OPA4343EA/250 optimal for cost-sensitive, high-speed, low-power analog-only designs.
Availability
OPA4343EA/250 is available at Aetrix Electronics and suitable for PCMCIA data acquisition, portable medical sensors, industrial IoT edge nodes, and audio line-level drivers requiring stable component supply across extended temperature ranges (–40°C to +85°C) and long production lifecycles.
Supply support for OPA4343EA/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 decades of expertise in precision op-amps and signal chain solutions.
The OPA343 family - including OPA4343EA/250 - was designed specifically for low-cost, miniature, single-supply applications demanding rail-to-rail performance, low power, and high-speed operation in data acquisition and portable instrumentation.
FAQ
What supply voltage range does the OPA4343EA/250 support?
The OPA4343EA/250 operates from a single supply of 2.5V to 5.5V, with full specifications guaranteed from 2.7V to 5V over –40°C to +85°C. This range allows direct compatibility with 3.3V and 5V systems, including decaying Li-ion batteries, without external regulators - a key enabler for portable OPA4343EA/250 deployments.
Does the OPA4343EA/250 require external compensation for unity-gain stability?
No, the OPA4343EA/250 is internally compensated and unity-gain stable. It drives capacitive loads up to 1000pF in unity-gain configuration without oscillation, though a 10Ω–20Ω series resistor at the output improves phase margin for loads >100pF - confirmed in the OPA4343EA/250 datasheet Figure 4 and Typical Performance Curves.
How does the rail-to-rail input stage of the OPA4343EA/250 function?
The OPA4343EA/250 uses parallel N-channel and P-channel input differential pairs, enabling input common-mode voltage from (V–) – 0.5V to (V+) + 0.5V. Within the 400mV transition region near (V+) – 1.3V, PSRR and CMRR degrade slightly - a documented behavior in the OPA4343EA/250 Applications Information section that users must consider for precision DC applications.
What is the thermal resistance (θJA) of the OPA4343EA/250 in its SSOP-16 package?
The OPA4343EA/250 in SSOP-16 has a junction-to-ambient thermal resistance (θJA) of 100°C/W, as specified in the Absolute Maximum Ratings table. This value assumes standard JEDEC 2-layer board conditions and enables reliable operation at +85°C ambient with ≤3.4mA total quiescent current - critical for sealed OPA4343EA/250 industrial enclosures.
Can the OPA4343EA/250 drive a 600Ω audio load?
Yes, the OPA4343EA/250's class AB output stage is explicitly rated to drive 600Ω loads connected anywhere between V+ and ground, as stated in the Applications Information section. At 5V supply, it delivers >4.9Vpp into 600Ω with <0.001% THD+N - making the OPA4343EA/250 suitable for line-out stages in portable audio gear.
OPA4343EA/250 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- MicroAmplifier™
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- 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:
- 2 mV
- Current - Supply:
- 850µA (x4 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:
- 16-SSOP
OPA4343EA/250 FAQ
1.How can I place an order for OPA4343EA/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4343EA/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 OPA4343EA/250 reliable?
The price and inventory of OPA4343EA/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4343EA/250 is usually 5 days.
3.What payment methods are accepted for OPA4343EA/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4343EA/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4343EA/250?
OPA4343EA/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4343EA/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 OPA4343EA/250?
For technical support, including OPA4343EA/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4343EA/250 requirements.
6.How does Aetrix verify that OPA4343EA/250 is sourced from the original manufacturer or authorized distributors?
All OPA4343EA/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 OPA4343EA/250 meets industry standards.
7.What is the process for return or replacement of OPA4343EA/250?
All OPA4343EA/250 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4343EA/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 OPA4343EA/250 part is unused and in its original packaging.
Return procedure for OPA4343EA/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4343EA/250 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…
