OPA2228UE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
OPA2228UE4 is a dual high-precision low-noise operational amplifier from Texas Instruments in an SOIC-8 package. Features 75 µV maximum offset voltage, 120 dB CMRR, and 10 nA maximum bias current for demanding signal conditioning. Available worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- OPA2228UE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of OPA2228UE4?
- 75 µV maximum input offset voltage for precision DC signal conditioning without calibration
- 120 dB minimum CMRR (138 dB typical) rejects common-mode noise in differential measurement circuits
- 10 nA maximum input bias current enables use with high-impedance sources such as pH electrodes and photodiodes
- Stable at closed-loop gains ≥5 V/V with internal frequency compensation for straightforward circuit design
What is OPA2228UE4 used for?
The OPA2228UE4 excels in precision data acquisition systems, medical instrumentation, and scientific measurement equipment where low noise and tight DC accuracy are essential. Its 10 nA bias current and 75 µV offset make it ideal for amplifying signals from high-impedance sensors such as photodiodes, pH probes, and piezoelectric transducers. The dual-channel configuration in SOIC-8 is also used in differential instrumentation amplifier front-ends and bridge sensor conditioning circuits.
What are the specifications of OPA2228UE4?
| YTEOL | 0 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Average Bias Current-Max (IIB) | 0.01 µA |
| Bias Current-Max (IIB) @25C | 0.01 µA |
| Common-mode Reject Ratio-Min | 120dB |
| Common-mode Reject Ratio-Nom | 138dB |
| Frequency Compensation | YES (AVCL>=5) |
| Input Offset Current-Max (IIO) | 0.01 µA |
| Input Offset Voltage-Max | 75 µV |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Low-Bias | NO |
| Low-Offset | YES |
| Micropower | NO |
| Neg Supply Voltage Limit-Max | -18 V |
| Neg Supply Voltage-Nom (Vsup) | -15 V |
| Number of Functions | 2 |
| 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 | 11V/us |
| Subcategory | Operational Amplifier |
| Supply Current-Max | 7.6mA |
| Supply Voltage Limit-Max | 18V |
| Supply Voltage-Nom (Vsup) | 15V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | INDUSTRIAL |
| 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 | 33000 |
| Voltage Gain-Min | 3981000 |
| 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 |
| Country of Origin | Malaysia |
Where can I find the OPA2228UE4 datasheet?
OPA2228UE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for OPA2228UE4?
Compatible alternatives and drop-in replacements for OPA2228UE4:
Frequently Asked Questions
At what closed-loop gain is the OPA2228UE4 stable, and why does this matter for audio or sensor circuits?
The OPA2228UE4 is internally compensated to be stable at closed-loop gains of 5 V/V or higher. Designs requiring unity-gain buffering must use an alternative op-amp, but for precision amplifier stages with 14 dB or more gain, the device delivers its full 120 dB CMRR and 75 µV offset performance without external compensation components.
How does the 10 nA bias current specification of the OPA2228UE4 benefit high-impedance sensor interfaces?
A 10 nA maximum bias current across a 1 MΩ source impedance generates only 10 mV of offset error, keeping the total referred-to-input error well below the 75 µV offset spec at moderate source impedances. This makes the OPA2228UE4 suitable for pH electrode buffers, reverse-biased photodiode transimpedance stages, and capacitive sensor front-ends.
How does OPA2228UE4 compare to single-channel OPA228 for a dual differential input instrumentation design?
The OPA2228UE4 integrates 2 matched channels in an SOIC-8 footprint, equivalent to two OPA228 devices in SOIC-8 packages but using roughly half the PCB area and reducing component count by one package. Both channels share the same 75 µV offset and 120 dB CMRR specs, making channel-to-channel matching reliable in differential amplifier topologies.
What common-mode rejection ratio does the OPA2228UE4 provide, and how does that affect 50 Hz/60 Hz noise rejection in industrial sensors?
With a minimum CMRR of 120 dB (138 dB typical), the OPA2228UE4 attenuates common-mode power-line interference by a factor exceeding 1 million, reducing 50 Hz or 60 Hz noise on balanced differential sensor lines to sub-microvolt levels — critical for thermocouples and strain gauges installed near AC power wiring in 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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