LF347BD Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The LF347BD is a quad JFET-input operational amplifier in a Small Outline package offering wide bandwidth and low input bias current of 0.2 nA. It delivers 80 dB minimum common-mode rejection and 4 MHz gain-bandwidth product. Available from stock worldwide with competitive pricing for signal conditioning designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- LF347BD Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2880(MOQ 1)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of LF347BD?
- Quad JFET-input op-amp with ultra-low input bias current of 0.2 nA max, minimizing loading on high-impedance signal sources
- Wide 4 MHz gain-bandwidth product enabling high-frequency amplifier and active filter designs up to 4 MHz
- 80 dB minimum common-mode rejection ratio (100 dB typical) ensuring excellent noise immunity in differential signal paths
- Small Outline package (SOIC) for compact PCB layouts while housing 4 independent amplifier channels
What is LF347BD used for?
The LF347BD is well suited for active filter networks, sample-and-hold circuits, and precision instrumentation front-ends where its JFET inputs prevent loading of high-impedance sensors. Its four independent channels make it ideal for multi-channel audio processing, data-acquisition signal conditioning, and voltage-to-current converter stages. The wide bandwidth and low bias current also support photodiode transimpedance amplifiers and capacitive sensor interfaces in industrial and medical equipment.
What are the specifications of LF347BD?
| YTEOL | 0 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Average Bias Current-Max (IIB) | 0.0002 µA |
| Bias Current-Max (IIB) @25C | 0.0002 µA |
| Common-mode Reject Ratio-Min | 80dB |
| Common-mode Reject Ratio-Nom | 100dB |
| Frequency Compensation | YES |
| Input Offset Current-Max (IIO) | 0.004 µA |
| Input Offset Voltage-Max | 5000 µV |
| JESD-30 Code | R-PDSO-G14 |
| JESD-609 Code | e4 |
| Low-Bias | YES |
| Low-Offset | NO |
| Micropower | NO |
| Neg Supply Voltage Limit-Max | -18 V |
| Neg Supply Voltage-Nom (Vsup) | -15 V |
| Number of Functions | 4 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP14,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power | NO |
| Programmable Power | NO |
| Qualification Status | Not Qualified |
| Slew Rate-Min | 8V/us |
| Slew Rate-Nom | 13V/us |
| Subcategory | Operational Amplifier |
| Supply Current-Max | 11mA |
| Supply Voltage Limit-Max | 18V |
| Supply Voltage-Nom (Vsup) | 15V |
| Surface Mount | YES |
| Technology | JFET |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Unity Gain BW-Nom | 3000 |
| Voltage Gain-Min | 25000 |
| Wideband | NO |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Mexico |
Where can I find the LF347BD datasheet?
LF347BD Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for LF347BD?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the input bias current of the LF347BD and why does it matter for high-impedance sensor circuits?
The LF347BD specifies a maximum input bias current of 0.2 nA (0.0002 µA) at 25°C, which is orders of magnitude lower than bipolar op-amps. This extremely low bias current prevents voltage errors when driving from megohm-range sources such as pH electrodes, photodiodes, or piezoelectric sensors, making the device ideal for precision measurement front-ends.
How does the LF347BD compare to the LF347N through-hole version when designing a compact 4-channel active filter board?
The LF347BD uses the SOIC Small Outline package, which typically occupies roughly 50% less PCB area than the 14-pin DIP of the LF347N, while providing identical electrical performance with 4 MHz gain-bandwidth product and 80 dB CMRR. For a compact active filter board targeting Sallen-Key or multiple-feedback topologies at frequencies up to 1 MHz, the SOIC footprint allows tighter component spacing and shorter signal traces, reducing parasitic inductance.
What supply voltage range and temperature range does the LF347BD support in industrial applications?
The LF347BD operates from ±5 V to ±18 V dual supplies (or up to 36 V single supply) and is rated over a commercial temperature range of 0°C to +70°C. For industrial environments requiring –40°C to +85°C operation, designers should evaluate the LF347I or military-grade variants. Within its rated range, offset voltage stays below 5000 µV max, supporting 12-bit accuracy in data-acquisition systems.
Can the LF347BD drive capacitive loads directly, and what precautions are needed for stability?
The LF347BD can drive small capacitive loads up to approximately 100 pF directly without oscillation at unity gain. For larger loads (greater than 100 pF), a series output resistor of 10 Ω to 100 Ω is recommended to add phase margin and prevent the 4 MHz gain-bandwidth from interacting with the load capacitance. This approach maintains stable operation in sample-and-hold, A/D driver, and cable-drive applications.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.2055 | $1.21 |
| 5+ | $0.9644 | $4.82 |
| 10+ | $0.2880 | $2.88 |
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