OPA348AIDG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments OPA348AIDG4 is a single CMOS operational amplifier with 1 MHz gain-bandwidth product and rail-to-rail input/output on 3V to 5V supply. It features an ultra-low 0.01 pA input bias current and voltage-feedback architecture in an 8-pin SOIC package. Suited for high-impedance sensor conditioning and portable precision signal-chain designs worldwide.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- OPA348AIDG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of OPA348AIDG4?
- Ultra-low 0.01 pA input bias current enables accurate signal conditioning from high-impedance photodiode and pH electrode sensors
- 1 MHz gain-bandwidth product with rail-to-rail I/O on 3 V to 5 V supply covers single-supply portable instrument designs
- Voltage-feedback architecture with 71 dB typical CMRR delivers stable, low-distortion amplification for precision measurement applications
What is OPA348AIDG4 used for?
The OPA348AIDG4 is well suited for portable medical instruments, chemical analysis equipment, and precision sensor interfaces where high-impedance sources such as pH electrodes, photodiodes, and piezoelectric sensors must be amplified without loading error. Its micropower supply range of 3V to 5V makes it compatible with single-cell lithium-ion and alkaline battery-powered data loggers. Engineers also deploy it in 4-20 mA loop transmitters and Wheatstone bridge amplifiers where low offset voltage and high common-mode rejection are essential.
What are the specifications of OPA348AIDG4?
| YTEOL | 0 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Average Bias Current-Max (IIB) | 0.00001 µA |
| Bias Current-Max (IIB) @25C | 0.00001 µA |
| Common-mode Reject Ratio-Min | 56dB |
| Common-mode Reject Ratio-Nom | 71dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 6000 µV |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Low-Bias | YES |
| Low-Offset | NO |
| Micropower | YES |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP8,.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-Nom | 0.5V/us |
| Supply Current-Max | 0.075mA |
| Supply Voltage Limit-Max | 7.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Unity Gain BW-Nom | 1000 |
| Voltage Gain-Min | 25100 |
| Wideband | NO |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Where can I find the OPA348AIDG4 datasheet?
OPA348AIDG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for OPA348AIDG4?
Compatible alternatives and drop-in replacements for OPA348AIDG4:
Frequently Asked Questions
How does the 0.01 pA input bias current of OPA348AIDG4 affect circuit design with high-impedance sensors?
With only 0.01 pA input bias current, the OPA348AIDG4 introduces less than 1 µV of error voltage across a 100 MΩ sensor source impedance, a level that is negligible for most precision 12-bit to 16-bit ADC systems. This allows direct interface to pH electrodes, photodiodes, and piezoelectric sensors without additional buffer stages or guard ring PCB techniques.
For a 3.3 V single-supply data acquisition system, how does the OPA348AIDG4 rail-to-rail output extend usable dynamic range?
Rail-to-rail output on OPA348AIDG4 swings to within a few millivolts of both supply rails, providing a usable output range of approximately 3.25 V on a 3.3 V supply versus roughly 2 V for a non-rail-to-rail alternative. This wider swing maximizes ADC input utilization, improving effective resolution by up to 2 additional bits compared to amplifiers with 0.5 V output headroom limitations.
When is OPA348AIDG4 a better fit than a higher-bandwidth op-amp such as OPA356 for a portable sensor application?
For signals below 10 kHz such as temperature, pressure, and chemical sensor outputs, the 1 MHz GBP of OPA348AIDG4 provides ample gain with a gain of 100, while its micropower quiescent current below 500 µA extends battery runtime significantly compared to OPA356 which draws several milliamps. This trade-off makes OPA348AIDG4 preferable for multi-month battery-powered field instruments.
What is the common-mode rejection ratio of OPA348AIDG4, and how does it benefit differential sensor measurements?
The OPA348AIDG4 achieves a typical CMRR of 71 dB and a minimum of 56 dB, attenuating common-mode noise such as 50 Hz or 60 Hz power-line interference by a factor of over 300. This rejection level allows the amplifier to extract small differential signals as low as a few millivolts from Wheatstone bridge and thermocouple sensor circuits operating in electrically noisy industrial environments.
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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.
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