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Texas Instruments OPA4347UA/2K5G4
- Part No.:
- OPA4347UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4347UA/2K5G4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,456
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Product details
Overview
OPA4347UA/2K5G4 from Texas Instruments is a quad, rail-to-rail input/output, microPower operational amplifier in SO-14 package, delivering 350kHz bandwidth, 20µA per-channel quiescent current, and operation from 2.3V to 5.5V single supply - ideal for low-power sensor signal conditioning in portable gas detectors.
For engineers reviewing the OPA4347UA/2K5G4 datasheet, OPA4347UA/2K5G4 pinout, OPA4347UA/2K5G4 application, or OPA4347UA/2K5G4 equivalent, key selection criteria include rail-to-rail swing (within 5mV of rails at light load), ultra-low IQ for battery longevity, input common-mode range extending 200mV beyond rails, and guaranteed operation from –55°C to +125°C.
Technical Context
The OPA4347UA/2K5G4 implements a complementary differential input stage (N- and P-channel pairs) enabling rail-to-rail input operation with a 400mV transition region where both pairs are active; PSRR and CMRR degrade within this region. Its class AB output stage delivers rail-to-rail output swing, achieving ≤15mV from rails at 100kΩ load and ≤125mV at 5kΩ load while maintaining >88dB open-loop gain.
It is unity-gain stable and optimized for driving medium-speed SAR ADCs like the ADS7822, supporting anti-aliasing RC filtering at the input. The device features input bias current as low as ±0.5pA (typ), 60nV/√Hz input voltage noise at 1kHz, and 0.17V/µs slew rate - balancing precision, speed, and power efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.3V to 5.5V single supply - enables direct integration into 3.3V and 5V battery-powered systems without level-shifting. |
| Quiescent Current (per channel) | 20µA (typ), 34µA (max) - supports multi-year operation on coin-cell batteries in smoke/CO detectors. |
| Gain-Bandwidth Product | 350kHz - sufficient for buffering 12-bit ADC inputs (e.g., ADS7822) and conditioning slow-varying sensor outputs. |
| Input Common-Mode Range | (V–) – 0.2V to (V+) + 0.2V - allows sensing signals below ground or above V+ in industrial transmitters. |
| Output Voltage Swing | Within 5mV of rails (RL = 100kΩ) - maximizes dynamic range in low-voltage systems (e.g., 2.5V supply). |
| Input Offset Voltage | 2mV (min), 6mV (typ) - ensures <0.1% error in 5V full-scale sensor interfaces without trimming. |
| Operating Temperature | –55°C to +125°C - qualified for automotive cabin, industrial control, and outdoor environmental monitoring. |
Pinout & Package
OPA4347UA/2K5G4 is packaged in a 14-pin SOIC (SO-14) surface-mount package with standard 1.27mm pitch, θJA = 100°C/W, and RoHS-compliant NiPdAu lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output - drives external load or ADC input; rail-to-rail capable. |
| 2 | –In A | Inverting input of Amp A - accepts feedback network or sensor signal inversion point. |
| 3 | +In A | Non-inverting input of Amp A - connects to reference, sensor, or filtered signal source. |
| 4 | V– | Negative supply pin - tied to ground in single-supply configurations; must be bypassed with 0.01µF ceramic capacitor. |
| 5 | +In B | Non-inverting input of Amp B - enables independent dual-channel signal conditioning. |
| 6 | –In B | Inverting input of Amp B - supports differential or inverting gain stages per channel. |
| 7 | Out B | Amplifier B output - electrically isolated from Out A; shares no internal coupling. |
| 8 | V+ | Positive supply pin - accepts 2.3V–5.5V; requires local 0.01µF ceramic decoupling. |
| 9 | Out C | Amplifier C output - provides third independent buffered channel for multi-sensor systems. |
| 10 | –In C | Inverting input of Amp C - supports configurable gain or filtering per channel. |
| 11 | +In C | Non-inverting input of Amp C - enables high-impedance sensor interface without loading. |
| 12 | +In D | Non-inverting input of Amp D - allows simultaneous conditioning of four analog channels. |
| 13 | –In D | Inverting input of Amp D - supports precision summing or difference amplification. |
| 14 | Out D | Amplifier D output - fully specified rail-to-rail performance identical to Out A/B/C. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 2.3V–5.5V supply range: input extends 200mV beyond rails; output swings within 5mV of rails at light loads. |
| Ultra-low quiescent current | 20µA per amplifier (typ) - reduces total system IQ to <80µA for quad configuration, critical for 10-year battery life in portable safety devices. |
| Unity-gain stability | Guaranteed stable with capacitive loads up to 250pF in unity-gain buffer mode - simplifies ADC driver design without external compensation. |
| Extended temperature range | Specified from –55°C to +125°C - eliminates derating concerns in automotive engine compartments or industrial enclosures. |
| High input impedance | 1013Ω || 6pF common-mode - prevents loading of high-impedance electrochemical sensors (e.g., CO detection cells). |
Applications
| Portable Gas Detection | Battery-Powered Instrumentation |
|---|---|
|
Use Scenario: Signal conditioning for electrochemical CO and smoke detector sensors operating from coin-cell batteries. IC Role / Device Role / Timing Role: Quad op amp buffers sensor output, rejects common-mode noise, and drives 12-bit SAR ADC (e.g., ADS7822) with minimal power overhead. Use Value: 20µA/channel IQ extends battery life to >5 years; rail-to-rail I/O preserves full 0–3.3V ADC input range at 3.3V supply. |
Use Scenario: Multi-channel analog front-end in handheld multimeters and portable data loggers. IC Role / Device Role / Timing Role: Four independent amplifiers condition thermistor, RTD, voltage, and current sensor signals simultaneously. Use Value: SO-14 footprint consolidates four precision amps; 350kHz GBW supports 10ksps sampling without aliasing. |
| 2-Wire Loop Transmitters | Low-Voltage Industrial Sensors |
|
Use Scenario: Input stage of 4–20mA loop-powered transmitters with HART modulation capability. IC Role / Device Role / Timing Role: Amplifies low-level sensor output (e.g., pressure bridge) and provides precise reference biasing for current DAC. Use Value: Input CM range down to (V–) – 0.2V allows ground-referenced sensor interfaces; 6mV VOS ensures <0.2% span error. |
Use Scenario: Signal amplification for MEMS accelerometers and humidity sensors in smart building nodes. IC Role / Device Role / Timing Role: Configured as instrumentation amp (using 3 op amps) or individual sensor buffers with programmable gain. Use Value: 60nV/√Hz noise density maintains SNR >70dB for 12-bit measurements; 125°C rating supports uncooled enclosure deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4348AIDR | Higher GBW (1MHz), higher IQ (45µA/channel), same SO-14 package. | Better suited for higher-speed sensor interfaces (>100ksps) but reduces battery life by ~2.2× vs OPA4347UA/2K5G4. | Select when bandwidth >500kHz is required and power budget allows ≥45µA/channel. |
| MCP6004-E/SL | Lower IQ (1µA/channel), lower GBW (1MHz), SC70-14 package (not SO-14). | Requires PCB redesign due to different footprint; insufficient drive strength for 5kΩ loads (output swing degrades >50mV). | Choose only if extreme ultra-low-power dominates over layout reuse and output drive requirements. |
Compared with OPA4348AIDR and MCP6004-E/SL, the OPA4347UA/2K5G4 uniquely balances 350kHz bandwidth, 20µA/channel IQ, rail-to-rail I/O, and SO-14 compatibility - making it optimal for cost-sensitive, battery-constrained, multi-channel analog systems requiring proven industrial temperature reliability.
Availability
OPA4347UA/2K5G4 is available at Aetrix Electronics and suitable for portable gas detection, battery-powered instrumentation, and 2-wire transmitter designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA4347UA/2K5G4 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 low-power signal chain solutions.
The OPA347 family - including OPA4347UA/2K5G4 - was designed specifically for ultra-low-power, rail-to-rail signal conditioning in portable and battery-operated safety-critical equipment such as smoke and CO detectors.
FAQ
What is the maximum operating temperature range for the OPA4347UA/2K5G4?
The OPA4347UA/2K5G4 is fully specified from –55°C to +125°C and can operate continuously up to +150°C. This makes it suitable for under-hood automotive, industrial control cabinets, and outdoor environmental monitoring where thermal extremes are encountered. All electrical parameters in the datasheet are guaranteed across the –55°C to +125°C range.
Does the OPA4347UA/2K5G4 support true rail-to-rail input and output operation?
Yes, the OPA4347UA/2K5G4 supports rail-to-rail input (common-mode range from V– – 0.2V to V+ + 0.2V) and rail-to-rail output (within 5mV of rails at 100kΩ load). Its complementary input stage enables operation 200mV beyond supply rails, and its class AB output stage delivers near-full supply swing - critical for maximizing dynamic range in low-voltage systems.
Can the OPA4347UA/2K5G4 drive a capacitive load directly?
Yes, the OPA4347UA/2K5G4 is unity-gain stable and can directly drive up to 250pF of pure capacitive load. For larger capacitances or mixed R-C loads, adding a 10Ω–20Ω series resistor at the output improves stability without compromising DC accuracy - a technique validated in TI's application notes for ADC driver configurations.
What is the typical quiescent current per channel for the OPA4347UA/2K5G4?
The typical quiescent current per channel for the OPA4347UA/2K5G4 is 20µA at +25°C and 2.5V–5.5V supply, with a maximum of 34µA per channel across temperature and voltage. This ultra-low IQ enables multi-year operation in battery-powered safety devices such as portable CO detectors using CR2032 cells.
Is the OPA4347UA/2K5G4 pin-compatible with other quad op amps in SO-14 packages?
No - while the OPA4347UA/2K5G4 uses the industry-standard SO-14 footprint, its pinout (Out A, –In A, +In A, V–, +In B, –In B, Out B, V+, Out C, –In C, +In C, +In D, –In D, Out D) is specific to the OPA347 family. It is not pin-compatible with generic quad op amps like LM324 or TLV2464; circuit redesign is required for substitution.
OPA4347UA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.17V/µs
- Gain Bandwidth Product:
- 350 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.5 pA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 20µA (x4 Channels)
- Current - Output / Channel:
- 17 mA
- Voltage - Supply Span (Min):
- 2.3 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
OPA4347UA/2K5G4 FAQ
1.How can I place an order for OPA4347UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4347UA/2K5G4 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 OPA4347UA/2K5G4 reliable?
The price and inventory of OPA4347UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4347UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA4347UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4347UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4347UA/2K5G4?
OPA4347UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4347UA/2K5G4 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 OPA4347UA/2K5G4?
For technical support, including OPA4347UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4347UA/2K5G4 requirements.
6.How does Aetrix verify that OPA4347UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA4347UA/2K5G4 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 OPA4347UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA4347UA/2K5G4?
All OPA4347UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4347UA/2K5G4, 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 OPA4347UA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA4347UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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