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Texas Instruments OPA4344EA/250
- Part No.:
- OPA4344EA/250
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4344EA/250.pdf
- Description:
- IC CMOS 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:746
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Product details
Overview
OPA4344EA/250 from Texas Instruments is a quad, rail-to-rail input/output CMOS operational amplifier optimized for precision, low-power, single-supply operation from 2.7V to 5.5V. It delivers 1MHz gain-bandwidth, 0.8V/µs slew rate, ±1mV max input offset voltage, 150µA typical quiescent current per amplifier, and output swing within 1mV of rails under light load - ideal for driving SAR ADCs in portable data acquisition systems.
For engineers reviewing the OPA4344EA/250 datasheet, OPA4344EA/250 pinout, OPA4344EA/250 application, or OPA4344EA/250 equivalent, key selection criteria include rail-to-rail I/O performance at 2.7V supply, THD+N of 0.006% at 1kHz, channel separation >120dB, microamp-level quiescent current, and TSSOP-14 package compatibility with space-constrained PCB layouts.
Technical Context
The OPA4344EA/250 implements a complementary CMOS 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 unity-gain stable architecture supports direct buffering of sampling ADC inputs without external compensation.
Internal class AB output stage achieves rail-to-rail output swing down to 1mV from V+ or V– with 100kΩ load while maintaining ≥104dB open-loop gain; output drive capability degrades predictably to ±400mV swing at 5kΩ load, supporting signal conditioning into moderate-impedance loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 1MHz - enables stable unity-gain buffer configurations for anti-aliasing and ADC driver applications up to ~100kHz closed-loop bandwidth. |
| Slew Rate | 0.8V/µs - supports full-scale 2V step settling in 5µs (0.1%) and 8µs (0.01%), suitable for medium-speed data acquisition. |
| Input Offset Voltage | ±1mV max - ensures ≤0.02% gain error in 10V full-scale instrumentation amplifiers without trimming. |
| Quiescent Current | 150µA per amplifier typ - enables four-channel analog front-end operation below 600µA total, critical for battery-powered devices. |
| THD + Noise | 0.006% at 1kHz - meets audio-grade signal fidelity requirements for voice-band filtering and microphone preamplification. |
| Rail-to-Rail Output Swing | Within 1mV of rails (100kΩ) - maximizes dynamic range in 3V and 5V single-supply systems, preserving >99.9% of available voltage headroom. |
| Common-Mode Rejection | 76dB min (VCM < V+−1.8V) - maintains accuracy when interfacing with sensors referenced to noisy system grounds. |
Pinout & Package
TSSOP-14 surface-mount package (JEDEC MO-153, 5mm × 4.4mm × 1.2mm), moisture sensitivity level 1 (unlimited floor life), RoHS-compliant, lead finish NiPdAu.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out D | Amplifier D output - drives external load or ADC input; rail-to-rail swing supports full-scale signal delivery. |
| 2 | –In D | Inverting input of Amp D - differential pair node; accepts signals from –0.3V to V+ + 0.3V with rail-to-rail common-mode range. |
| 3 | +In D | Non-inverting input of Amp D - matched to –In D for precision differential gain; laser-trimmed offset minimizes error. |
| 4 | –V | Negative supply rail - connects to ground in single-supply operation; must be bypassed with 0.01µF ceramic capacitor. |
| 5 | +In C | Non-inverting input of Amp C - electrically isolated from other channels; enables independent sensor conditioning paths. |
| 6 | –In C | Inverting input of Amp C - shares no internal nodes with Amps A/B/D; channel separation >120dB prevents crosstalk. |
| 7 | Out C | Amplifier C output - independently buffered output; supports simultaneous multi-channel signal processing without interaction. |
| 8 | Out A | Amplifier A output - primary channel for system-critical signal path; identical AC/DC specs to Amps B/C/D. |
| 9 | –In A | Inverting input of Amp A - used in inverting configurations; common-mode voltage fixed by feedback network for stability. |
| 10 | +In A | Non-inverting input of Amp A - high-impedance node (10¹³Ω || 6pF); minimal loading on high-Z sources like piezoelectric sensors. |
| 11 | +V | Positive supply rail - operates from 2.7V to 5.5V; PSRR of 200µV/V ensures immunity to supply ripple. |
| 12 | +In B | Non-inverting input of Amp B - supports parallel channel configuration; matched bias current (<10pA) avoids resistor-induced offset. |
| 13 | –In B | Inverting input of Amp B - low input bias current enables high-value feedback networks without gain drift. |
| 14 | Out B | Amplifier B output - complements Amp A in dual-sensor or differential-output topologies; identical thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 300mV beyond V+ and V– rails - enables direct interface with sensors operating near supply limits, e.g., 0–3.3V thermistor bridges. |
| Rail-to-rail output swing (100kΩ) | Within 1mV of V+ and V– - preserves maximum SNR in 3V systems by utilizing full supply voltage range for signal encoding. |
| Ultra-low quiescent current | 150µA per amplifier - allows four-channel analog signal chain operation below 600µA, extending battery life in portable medical monitors. |
| Unity-gain stable architecture | No external compensation required - simplifies layout and reduces BOM count in ADC driver, active filter, and I/V conversion circuits. |
| High channel separation | >120dB at DC - prevents inter-channel leakage in multi-signal acquisition systems such as 4-channel ECG front-ends. |
Applications
| PCMCIA Data Acquisition Card | Industrial Process Control Sensor Interface |
|---|---|
Use Scenario: Signal conditioning for 12-bit SAR ADC in compact PCMCIA-format data loggers powered by 3.3V USB bus. IC Role / Device Role / Timing Role: Quad op-amp provides simultaneous I/V conversion, anti-alias filtering, reference buffering, and ADC input driving with rail-to-rail swing. Use Value: 150µA per amplifier enables full 4-channel operation under 600µA, meeting PCMCIA Class A power budget while delivering 0.006% THD+N fidelity. | Use Scenario: Four-channel 4–20mA loop receiver in DIN-rail mounted PLC I/O modules operating from 24VDC-derived 5V rail. IC Role / Device Role / Timing Role: Each amplifier conditions one current-loop sensor output, providing precision gain, offset correction, and rail-to-rail output for ADC input. Use Value: ±1mV max offset voltage ensures ≤0.01% measurement error across 16-bit industrial ADCs; TSSOP-14 footprint saves board area vs discrete solutions. |
| Audio Bandpass Filter for Voice Recognition | Portable Test Equipment Front-End |
Use Scenario: Electret microphone preamplifier and 300Hz–3kHz bandpass filter in battery-powered voice-command devices. IC Role / Device Role / Timing Role: Two amplifiers implement 2nd-order Sallen-Key bandpass; third buffers filtered output; fourth drives ADC input. Use Value: 0.006% THD+N at 1kHz meets speech intelligibility standards; 1MHz GBW supports sharp filter roll-off without phase distortion. | Use Scenario: Multi-channel oscilloscope or DMM analog front-end requiring simultaneous DC-coupled signal conditioning and fast settling. IC Role / Device Role / Timing Role: Quad configuration enables independent gain/offset adjustment per channel before multiplexed ADC sampling. Use Value: 5µs 0.1% settling time supports 100kSPS sampling; rail-to-rail I/O eliminates level-shifting components in ±2.5V input ranges. |
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 | SO-14 package (larger footprint, 100°C/W θJA vs 100°C/W for TSSOP), same electrical specs, rail-and-reel or tube packaging. | Preferred for prototyping or through-hole assembly; less suitable for high-density portable designs. | Select OPA4344UA when manual soldering or breadboarding is required; OPA4344EA/250 is optimal for automated SMT production of compact devices. |
| TLV2464AIDR | 1.5MHz GBW, 0.6V/µs slew rate, 500µA IQ per amp, 3mV max VOS - higher power, lower precision, faster settling than OPA4344EA/250. | Better suited for higher-speed, lower-accuracy applications like motor control feedback; not recommended for precision 12-bit+ data acquisition. | Choose TLV2464AIDR only if system requires >100kHz closed-loop bandwidth and can tolerate higher quiescent current and offset voltage. |
Compared with OPA4344UA and TLV2464AIDR, the OPA4344EA/250 uniquely balances ultra-low power (150µA/amp), precision (±1mV VOS), and rail-to-rail performance in the smallest quad op-amp footprint, making it the optimal choice for battery-powered, space-constrained instrumentation.
Availability
OPA4344EA/250 is available at Aetrix Electronics and suitable for portable medical monitors, industrial sensor nodes, and handheld test equipment requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for OPA4344EA/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 signal chain components.
The OPA344/4344 family belongs to TI's MicroAmplifier™ series, designed specifically for low-power, miniature, single-supply applications demanding rail-to-rail I/O, sub-millivolt offset, and microamp quiescent current - targeting portable instrumentation and energy-efficient sensing.
FAQ
What is the operating supply voltage range for the OPA4344EA/250?
The OPA4344EA/250 operates from a single supply of 2.7V to 5.5V, with full specifications guaranteed across this range. It functions down to 2.5V (non-specified), and absolute maximum supply is 7.5V. This makes the OPA4344EA/250 suitable for modern 3.3V and 5V systems, including USB-powered and battery-operated devices where supply headroom is constrained.
Is the OPA4344EA/250 unity-gain stable?
Yes, the OPA4344EA/250 is unity-gain stable and requires no external compensation. As part of the OPA344 series, it is explicitly designed for stable operation at G = 1, unlike the higher-speed OPA345 variants which require minimum G ≥ 5. This stability simplifies circuit design in buffer, active filter, and ADC driver applications using the OPA4344EA/250.
What is the maximum output current capability of the OPA4344EA/250?
The OPA4344EA/250 provides ±15mA short-circuit output current per amplifier, with continuous safe operation into resistive loads. Under normal linear operation with 5kΩ load, output swing remains within 400mV of rails while maintaining ≥96dB open-loop gain. This supports direct driving of moderate-impedance loads such as ADC input networks and active filter stages without external buffers.
Does the OPA4344EA/250 support rail-to-rail input and output simultaneously?
Yes, the OPA4344EA/250 supports true rail-to-rail input common-mode range (–0.3V to V+ + 0.3V) and rail-to-rail output swing (within 1mV of rails with 100kΩ load). This simultaneous capability enables full utilization of the supply voltage in single-supply systems - for example, accepting 0–3.3V sensor outputs and delivering 0–3.3V conditioned signals to an ADC - maximizing dynamic range and SNR in the OPA4344EA/250 signal chain.
What package type and moisture sensitivity level does the OPA4344EA/250 use?
The OPA4344EA/250 uses a TSSOP-14 package (JEDEC MO-153, 5mm × 4.4mm) with NiPdAu lead finish and is rated MSL Level-1 (unlimited floor life at ≤30°C/60% RH). This makes it ideal for high-volume SMT assembly without baking requirements, unlike moisture-sensitive alternatives. The compact footprint saves PCB area compared to SO-14, supporting miniaturized designs where the OPA4344EA/250 is deployed.
OPA4344EA/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:
- 0.8V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.2 pA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 150µA (x4 Channels)
- Current - Output / Channel:
- 15 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:
- 14-TSSOP
OPA4344EA/250 FAQ
1.How can I place an order for OPA4344EA/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4344EA/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 OPA4344EA/250 reliable?
The price and inventory of OPA4344EA/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4344EA/250 is usually 5 days.
3.What payment methods are accepted for OPA4344EA/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4344EA/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4344EA/250?
OPA4344EA/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4344EA/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 OPA4344EA/250?
For technical support, including OPA4344EA/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4344EA/250 requirements.
6.How does Aetrix verify that OPA4344EA/250 is sourced from the original manufacturer or authorized distributors?
All OPA4344EA/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 OPA4344EA/250 meets industry standards.
7.What is the process for return or replacement of OPA4344EA/250?
All OPA4344EA/250 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4344EA/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 OPA4344EA/250 part is unused and in its original packaging.
Return procedure for OPA4344EA/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4344EA/250 Tags
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