OPA227UE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments OPA227UE4 is a high-precision, low-noise operational amplifier with 100 µV maximum input offset voltage, 120 dB minimum CMRR, and 10 nA maximum bias current in an 8-pin SOIC package. It suits instrumentation, data acquisition, and audio applications requiring ultra-low noise. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- OPA227UE4 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 OPA227UE4?
- 100 µV maximum input offset voltage and 120 dB minimum common-mode rejection ratio for precision differential signal amplification with minimal error
- Ultra-low 10 nA maximum input bias current enabling accurate signal conditioning from high-impedance sensors without loading the source
- Low voltage noise density of 3 nV/√Hz enabling high-SNR amplification in audio, seismic, and medical instrumentation front-ends
What is OPA227UE4 used for?
The OPA227UE4 is designed for precision data acquisition systems, medical instrumentation amplifiers, and audio recording front-ends where low noise and high common-mode rejection are paramount. Its 100 µV maximum offset and 138 dB typical CMRR make it suitable for strain gauge bridges, thermocouple amplifiers, and pH electrode signal chains. The device also fits precision analog filters, active guard drivers, and high-resolution ADC input buffers.
What are the specifications of OPA227UE4?
| 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 |
| Input Offset Voltage-Max | 100 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 | 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 | 2.3V/us |
| Supply Current-Max | 4.2mA |
| Supply Voltage Limit-Max | 18V |
| Supply Voltage-Nom (Vsup) | 15V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | INDUSTRIAL |
| 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 | 8000 |
| Voltage Gain-Min | 3980000 |
| Wideband | NO |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Where can I find the OPA227UE4 datasheet?
OPA227UE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for OPA227UE4?
Compatible alternatives and drop-in replacements for OPA227UE4:
Frequently Asked Questions
What is the input offset voltage and CMRR of OPA227UE4, and why do these matter for bridge sensor amplifiers?
The OPA227UE4 has a maximum input offset voltage of 100 µV and a minimum CMRR of 120 dB (typical 138 dB). For a strain gauge bridge with 10 mV full-scale output, a 100 µV offset represents only 1% error, and 120 dB CMRR means common-mode noise from power lines is attenuated by a factor of 1,000,000, preserving measurement accuracy.
How does OPA227UE4 input bias current affect high-impedance sensor interfaces like pH probes?
The OPA227UE4 maximum input bias current is 10 nA (0.01 µA). With a pH electrode source impedance of 100 MΩ to 1 GΩ, even 10 nA of bias current would create only 1 mV to 10 mV of error at 100 MΩ, which is manageable. For higher-impedance probes above 1 GΩ, an FET-input amplifier with sub-pA bias current would be preferred.
What voltage noise density does OPA227UE4 achieve and how does it compare for audio preamplifier designs?
The OPA227UE4 exhibits a typical input voltage noise density of approximately 3 nV/√Hz at 1 kHz. Over a 20 kHz audio bandwidth, this gives a broadband noise of roughly 0.4 µV RMS, which is excellent for microphone preamplifier and ADC buffer stages requiring very low noise floors below -120 dBu for professional audio equipment.
What package does OPA227UE4 come in and is it suitable for compact PCB designs?
The OPA227UE4 is packaged in an 8-pin SOIC with 1.27 mm lead pitch and a 4.9 mm x 3.9 mm body. This small footprint suits compact precision measurement PCBs and is fully compatible with standard SMD reflow assembly, making it practical for integration alongside ADCs, reference voltages, and filter networks in high-accuracy analog front-ends.
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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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