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Texas Instruments OPA4347EA/250
- Part No.:
- OPA4347EA/250
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4347EA/250.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:827
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Product details
Overview
OPA4347EA/250 from Texas Instruments is a quad, micropower, rail-to-rail input/output operational amplifier in TSSOP-14 package, specified for –55°C to +125°C operation, with 350kHz gain-bandwidth, 20µA per-channel quiescent current, and 2.3V to 5.5V single-supply operation - ideal for battery-powered smoke and CO detectors.
For engineers reviewing the OPA4347EA/250 datasheet, OPA4347EA/250 pinout, OPA4347EA/250 application, or OPA4347EA/250 equivalent, key selection criteria include ultra-low IQ, rail-to-rail I/O swing within 5mV of rails at light loads, input common-mode range extending 200mV beyond supplies, and guaranteed performance across extended temperature.
Technical Context
The OPA4347EA/250 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 ADCs like the ADS7822, supporting low-noise signal conditioning in portable instrumentation. Input bias current is ±0.5pA typical, input voltage noise is 60nV/√Hz at 1kHz, and it features 128dB channel separation at 1kHz - critical for multi-channel sensor front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current | 20µA per channel - enables multi-year battery life in coin-cell–powered detectors. |
| Gain-Bandwidth Product | 350kHz - supports anti-aliasing filtering and sensor signal amplification up to ~100kHz without instability. |
| Input Common-Mode Range | (V−) − 0.2V to (V+) + 0.2V - allows direct interfacing with sensors operating near supply rails. |
| Output Voltage Swing | Within 5mV of rails (RL = 100kΩ) - maximizes dynamic range in low-voltage (2.3V–5.5V) systems. |
| Input Offset Voltage | 2mV max (typical 6mV) - ensures <0.1% error in 2V full-scale smoke detector transducer outputs. |
| Operating Temperature | −55°C to +125°C - qualified for automotive cabin and industrial environmental monitoring deployments. |
| Supply Voltage Range | 2.3V to 5.5V - compatible with single Li-ion, two alkaline, or regulated 3.3V/5V rails. |
Pinout & Package
TSSOP-14 surface-mount package (JEDEC MO-153), 5.0mm × 4.4mm × 1.2mm body, lead-free NiPdAu finish, MSL Level-2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out D | Amplifier D output - drives external load or ADC input; rail-to-rail capable. |
| 2 | –In D | Inverting input of Amp D - accepts feedback or signal inversion path. |
| 3 | +In D | Non-inverting input of Amp D - connects to sensor reference or high-impedance source. |
| 4 | V− | Negative supply rail - shared ground or negative bias for dual-supply operation. |
| 5 | +In C | Non-inverting input of Amp C - used for independent channel sensing (e.g., CO vs smoke). |
| 6 | –In C | Inverting input of Amp C - enables differential or transimpedance configuration. |
| 7 | Out C | Amplifier C output - isolated signal path for multi-sensor analog front-end. |
| 8 | Out A | Amplifier A output - primary channel for main sensor signal conditioning. |
| 9 | –In A | Inverting input of Amp A - supports precision gain-setting with matched resistors. |
| 10 | +In A | Non-inverting input of Amp A - high-impedance node for thermistor or electrochemical sensor. |
| 11 | V+ | Positive supply rail - powers all four amplifiers; bypass with 0.01µF ceramic capacitor. |
| 12 | +In B | Non-inverting input of Amp B - dedicated input for reference voltage or calibration path. |
| 13 | –In B | Inverting input of Amp B - enables ratiometric offset correction or buffer feedback. |
| 14 | Out B | Amplifier B output - provides auxiliary signal path (e.g., temperature compensation). |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables full utilization of 2.3V–5.5V supply range - no headroom loss in low-voltage battery systems. |
| 20µA per-channel quiescent current | Supports continuous operation on CR2032 for >5 years in standby smoke detection mode. |
| 350kHz bandwidth with 0.17V/µs slew rate | Sufficient for DC–100Hz gas sensor outputs and fast step response in alarm-trigger circuits. |
| ±0.5pA typical input bias current | Minimizes voltage error across high-value sensor resistors (e.g., 10MΩ photoelectric chamber networks). |
| 128dB channel separation at 1kHz | Prevents crosstalk between independent smoke and CO sensing channels in quad-front-end designs. |
Applications
| Smoke Detection Front-End | CO Gas Sensor Amplifier |
|---|---|
|
Use Scenario: Amplifies weak photocurrent from ionization or optical smoke chamber under battery power. IC Role / Device Role / Timing Role: Quad OPA4347EA/250 configures one amp as transimpedance preamp, one as reference buffer, two as comparator inputs. Use Value: 20µA/channel IQ extends CR2032 battery life beyond UL-certified 10-year service interval. |
Use Scenario: Conditions electrochemical CO sensor output (nA-level current, mV-level voltage) in portable safety monitors. IC Role / Device Role / Timing Role: Single amplifier per sensor channel provides gain, offset trimming, and rail-to-rail output to 12-bit ADC. Use Value: Input common-mode range extending 200mV beyond rails accommodates sensor bias drift over temperature. |
| 2-Wire Loop-Powered Transmitter | Portable Medical Sensor Interface |
|
Use Scenario: Signal conditioning stage in 4–20mA loop transmitter for industrial gas analyzers. IC Role / Device Role / Timing Role: OPA4347EA/250 buffers sensor output and drives V/I converter; operates from loop-derived 3.3V. Use Value: 350kHz GBW ensures stable closed-loop response with 100Ω–500Ω loop impedance variations. |
Use Scenario: Low-power biopotential front-end in handheld pulse oximeters or ECG patches. IC Role / Device Role / Timing Role: Configured as AC-coupled instrumentation amplifier (using 2 amps) and reference driver (2 amps). Use Value: 60nV/√Hz input voltage noise preserves SNR for µV-level bio-signals at 1kHz sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4348AIDR | Higher IQ (45µA/channel), 1MHz GBW, same rail-to-rail I/O, but only rated to +105°C. | Better for higher-bandwidth sensor interfaces (e.g., ultrasonic flow meters); not suitable for automotive under-hood use. | Select OPA4348AIDR when bandwidth >350kHz is required and extended temperature is not needed. |
| MCP6004T-I/ST | Lower IQ (1µA/channel), 1MHz GBW, but input offset voltage (1.5mV typ) and CMRR (70dB) are inferior. | Acceptable for cost-sensitive consumer smoke alarms with relaxed accuracy; lacks –55°C qualification. | Choose MCP6004T-I/ST only for commercial-grade portable equipment where extended temp and precision are noncritical. |
Compared with OPA4347EA/250, OPA4348AIDR trades ultra-low power for speed and reduced drive capability, while MCP6004T-I/ST sacrifices precision and temperature range for minimal IQ - making OPA4347EA/250 the sole option meeting UL 217/UL 2034 requirements for low-power, high-accuracy, wide-temperature gas detection.
Availability
OPA4347EA/250 is available at Aetrix Electronics and suitable for smoke detection systems, CO monitoring devices, and 2-wire industrial transmitters requiring stable component supply across extended temperature and long-life battery operation.
Supply support for OPA4347EA/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 amplifiers and sensor interface solutions.
The OPA347 family - including OPA4347EA/250 - was designed specifically for ultra-low-power, rail-to-rail signal conditioning in portable safety and environmental monitoring systems.
FAQ
What is the maximum operating temperature range for the OPA4347EA/250?
The OPA4347EA/250 is fully specified and tested from –55°C to +125°C, with absolute maximum ratings extending to +150°C junction temperature. This makes OPA4347EA/250 suitable for under-hood automotive gas sensors and industrial environments where thermal stress exceeds commercial-grade limits.
Does the OPA4347EA/250 support single-supply operation?
Yes, the OPA4347EA/250 operates from a single supply of 2.3V to 5.5V. Its rail-to-rail input extends 200mV beyond the supply rails and its output swings within 5mV of both rails at light loads - enabling true single-supply functionality without level-shifting circuitry.
What is the quiescent current per channel for the OPA4347EA/250?
The OPA4347EA/250 draws 20µA per channel typical (34µA max) at 25°C, rising to 38µA max over temperature. This ultra-low IQ enables multi-year operation on small batteries - critical for maintenance-free smoke and CO detectors certified to UL 217 and UL 2034.
Can the OPA4347EA/250 drive capacitive loads directly?
The OPA4347EA/250 can directly drive up to 250pF in unity-gain configuration. For larger capacitive loads (e.g., ADC input capacitance), adding a 10Ω–20Ω series resistor at the output improves stability without degrading DC accuracy - a technique validated in TI's application notes for ADS7822 interfacing.
Is the OPA4347EA/250 pin-compatible with other TSSOP-14 op-amps?
No - the OPA4347EA/250 has a proprietary quad-amplifier pinout optimized for signal isolation and layout symmetry. It is not pin-compatible with generic TSSOP-14 op-amps such as LM324 or TLV2464; PCB redesign is required for substitution.
OPA4347EA/250 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- microPOWER™
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-TSSOP
OPA4347EA/250 FAQ
1.How can I place an order for OPA4347EA/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4347EA/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 OPA4347EA/250 reliable?
The price and inventory of OPA4347EA/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4347EA/250 is usually 5 days.
3.What payment methods are accepted for OPA4347EA/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4347EA/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4347EA/250?
OPA4347EA/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4347EA/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 OPA4347EA/250?
For technical support, including OPA4347EA/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4347EA/250 requirements.
6.How does Aetrix verify that OPA4347EA/250 is sourced from the original manufacturer or authorized distributors?
All OPA4347EA/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 OPA4347EA/250 meets industry standards.
7.What is the process for return or replacement of OPA4347EA/250?
All OPA4347EA/250 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4347EA/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 OPA4347EA/250 part is unused and in its original packaging.
Return procedure for OPA4347EA/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4347EA/250 Tags
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LM358DT
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