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Texas Instruments OPA2227U/2K5E4
- Part No.:
- OPA2227U/2K5E4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2227U/2K5E4.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,258
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Product details
Overview
OPA2227U/2K5E4 from Texas Instruments is a dual high-precision, low-noise operational amplifier optimized for AC and precision DC applications. It delivers 3 nV/√Hz voltage noise, 8 MHz gain bandwidth, 2.3 V/µs slew rate, and ±75 µV max input offset voltage across –40°C to 85°C, serving as a pin-for-pin upgrade to OP-27 in professional audio and data acquisition systems.
For engineers reviewing the OPA2227U/2K5E4 datasheet, OPA2227U/2K5E4 pinout, OPA2227U/2K5E4 application, or OPA2227U/2K5E4 equivalent, key selection criteria include its unity-gain stability, rail-to-rail output swing capability under ±2.5 V to ±18 V supplies, low 10 nA input bias current, and SOIC-8 package compatibility with legacy OP-27 layouts.
Technical Context
The OPA2227U/2K5E4 implements a bipolar input stage with laser-trimmed thin-film resistors to achieve low offset drift (±0.1 µV/°C typ) and high open-loop gain (160 dB). Its internal compensation ensures unity-gain stability without external components while maintaining 138 dB CMRR and 160 dB AOL over temperature.
Designed for mixed-signal signal chains, it supports dual-channel operation with >120 dB channel separation at DC and maintains <0.00005% THD+N at 1 kHz with 3.5 Vrms output - critical for spectral analysis and vibration measurement front-ends where harmonic integrity and noise floor define system resolution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 8 MHz - enables stable closed-loop operation up to 100 kHz with G = 100, suitable for anti-aliasing and active filter stages. |
| Slew Rate | 2.3 V/µs - supports full-scale 10 V step settling in ≤5.6 µs (0.01%), essential for fast data acquisition sampling. |
| Input Voltage Noise | 3 nV/√Hz @ 1 kHz - sets thermal noise floor for sensor interfaces with 10 kΩ source impedances. |
| Input Offset Voltage | ±75 µV max - ensures ≤0.0015% gain error in 5 V full-scale instrumentation amplifiers. |
| CMRR | 138 dB - rejects common-mode interference from noisy power rails or shared ground paths in multi-channel systems. |
| Supply Range | ±2.5 V to ±18 V - allows direct interface with ±5 V, ±12 V, or ±15 V industrial and audio subsystems without level-shifting. |
| Quiescent Current | ±3.8 mA per amplifier - balances precision performance with power efficiency in battery-powered portable test equipment. |
Pinout & Package
OPA2227U/2K5E4 is housed in an 8-pin SOIC (SO-8) package measuring 4.90 mm × 3.91 mm, compatible with standard surface-mount assembly processes and footprint-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Out A (Pin 1) | Output channel A | Provides buffered, low-impedance output for first signal path; drives 600 Ω loads to within ±3.5 V of rails. |
| –In A (Pin 2) | Inverting input channel A | Accepts feedback or inverted signal; matched impedance minimizes offset drift from thermal EMFs. |
| +In A (Pin 3) | Noninverting input channel A | High-impedance (10⁹ Ω || 3 pF) node for reference or sensor inputs; immune to common-mode noise. |
| V– (Pin 4) | Negative supply rail | Reference for dual-supply operation; must be decoupled with 0.1 µF capacitor near pin for stability. |
| +In B (Pin 5) | Noninverting input channel B | Independent second input; enables differential pair or dual-path conditioning without crosstalk degradation. |
| –In B (Pin 6) | Inverting input channel B | Matches Pin 2 characteristics; supports identical gain configurations for both channels. |
| Out B (Pin 7) | Output channel B | Second independent output; maintains >120 dB channel separation up to 100 kHz for simultaneous measurements. |
| V+ (Pin 8) | Positive supply rail | Power input for dual-supply operation; requires local 0.1 µF ceramic decoupling to suppress PSRR-induced errors. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable architecture | Eliminates need for external compensation components in G = 1 configurations, reducing BOM count and layout complexity. |
| Laser-trimmed input offset | Guarantees ±75 µV max offset without user trimming, enabling plug-and-play calibration in production test fixtures. |
| Low 10 nA input bias current | Minimizes voltage error across high-value feedback networks (e.g., 1 MΩ), preserving gain accuracy in transimpedance amplifiers. |
| 138 dB CMRR at DC | Rejects ground bounce and supply ripple in multi-board systems, ensuring stable DC operating points in precision analog front-ends. |
| SOIC-8 footprint compatibility | Direct replacement for OP-27, LT1007, and MAX427 in existing designs - no PCB rework required. |
Applications
| Professional Audio Preamp | Data Acquisition Front-End |
|---|---|
Use Scenario: Low-noise microphone preamplification in studio-grade audio interfaces requiring wide dynamic range and minimal harmonic distortion. IC Role / Device Role / Timing Role: Dual-channel op-amp providing gain, buffering, and common-mode rejection for balanced XLR inputs before ADC conversion. Use Value: 3 nV/√Hz input noise and <0.00005% THD+N preserve signal fidelity across 20 Hz–20 kHz, enabling >120 dB SNR in 24-bit recording systems. | Use Scenario: High-resolution sensor signal conditioning in automated test equipment capturing thermocouple, strain gauge, or RTD outputs. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end stage with programmable gain and offset correction prior to multiplexed ADC sampling. Use Value: ±75 µV offset and ±0.1 µV/°C drift ensure ≤0.01% measurement error over industrial temperature ranges without recalibration. |
| Vibration Analysis System | Spectral Analysis Instrumentation |
Use Scenario: Signal conditioning for piezoelectric accelerometers in predictive maintenance analyzers monitoring rotating machinery health. IC Role / Device Role / Timing Role: Charge amplifier and bandpass filter driver delivering flat frequency response from 0.1 Hz to 10 kHz with minimal phase shift. Use Value: 8 MHz GBW and 2.3 V/µs slew rate support accurate transient capture of impact events and resonance peaks without slew-induced distortion. | Use Scenario: Input stage for real-time spectrum analyzers performing FFT-based frequency-domain analysis of RF or audio signals. IC Role / Device Role / Timing Role: Low-noise, high-linearity buffer and anti-aliasing filter driver feeding high-speed ADCs with minimal added jitter or noise floor elevation. Use Value: 138 dB CMRR and 160 dB open-loop gain maintain amplitude accuracy across multi-decade frequency sweeps, ensuring calibrated spectral magnitude response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2227P | Dual in PDIP-8 package; higher RθJA (48.9°C/W vs 101.9°C/W), lower thermal performance in compact enclosures. | Preferred for through-hole prototyping or legacy DIP-based test fixtures where SOIC reflow is unavailable. | Select OPA2227P only when manual soldering or socket-based validation is required; otherwise OPA2227U/2K5E4 offers superior thermal and high-volume assembly compatibility. |
| LT1007CN8#PBF | Higher 10 nA max input bias current; 120 dB CMRR (vs 138 dB); no guaranteed 8 MHz GBW at ±2.5 V supply. | Acceptable for cost-sensitive general-purpose precision applications but not recommended for low-source-impedance, high-accuracy sensor interfaces. | Choose LT1007CN8#PBF only if budget constraints outweigh requirements for ultra-low noise, rail-swing output, and guaranteed wide supply range operation. |
Compared with OPA2227P and LT1007CN8#PBF, the OPA2227U/2K5E4 provides superior thermal resistance management in SOIC packaging, tighter offset voltage specification, and guaranteed performance across ±2.5 V to ±18 V - making it optimal for space-constrained, high-reliability industrial and audio designs.
Availability
OPA2227U/2K5E4 is available at Aetrix Electronics and suitable for professional audio preamplifiers, vibration analysis systems, and high-resolution data acquisition front-ends requiring stable component supply and long-term design continuity.
Supply support for OPA2227U/2K5E4 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 op-amp design and manufacturing.
The OPAx22x product line was engineered specifically for applications demanding simultaneous high AC fidelity and DC accuracy - including test and measurement, audio, geophysical sensing, and spectral analysis instrumentation.
FAQ
What is the maximum operating temperature range for the OPA2227U/2K5E4?
The OPA2227U/2K5E4 is specified for operation from –40°C to +85°C ambient temperature, with absolute maximum junction temperature rated at 150°C. Its electrical characteristics - including offset voltage, CMRR, and gain bandwidth - are fully guaranteed across this industrial temperature range, making it suitable for deployment in harsh environments such as factory-floor data loggers and outdoor vibration monitors.
Does the OPA2227U/2K5E4 require external compensation capacitors?
No, the OPA2227U/2K5E4 is internally compensated for unity-gain stability and does not require external compensation capacitors in any closed-loop configuration. This eliminates component count and layout sensitivity in G ≥ 1 applications, unlike some high-speed op-amps that mandate external compensation for stability - simplifying design validation for the OPA2227U/2K5E4 in active filters and buffer circuits.
Can the OPA2227U/2K5E4 operate from a single supply?
Yes, the OPA2227U/2K5E4 supports single-supply operation with V– grounded and V+ ranging from +5 V to +36 V, provided the input common-mode and output voltage ranges remain within specifications. Its input stage operates down to (V–)+2 V and output swings to within 2 V of either rail, enabling use in single-supply sensor interfaces - though dual-supply operation is recommended to maximize dynamic range and minimize distortion in AC-coupled applications.
How does the OPA2227U/2K5E4 compare to the OPA227 in terms of pin compatibility and performance?
The OPA2227U/2K5E4 is the dual-channel variant of the OPA227 family and shares identical electrical specifications and pinout mapping per channel. Both use the same SOIC-8 package with matching pin functions (Out A/Out, –In A/–In, +In A/+In, etc.), enabling drop-in replacement in dual-amplifier layouts. Performance parameters - including 3 nV/√Hz noise, 8 MHz GBW, and ±75 µV offset - are identical between OPA227 (single) and OPA2227U/2K5E4 (dual) under equivalent test conditions.
What decoupling capacitance is recommended for the OPA2227U/2K5E4 power pins?
Texas Instruments recommends placing a 0.1 µF ceramic capacitor between each supply pin (V+ and V–) and ground, located as close as possible to the respective pins on the OPA2227U/2K5E4. This minimizes high-frequency supply impedance and prevents instability or increased noise due to power rail coupling - especially critical in high-gain, wide-bandwidth configurations where PSRR degrades above 10 kHz.
OPA2227U/2K5E4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 2.3V/µs
- Gain Bandwidth Product:
- 8 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2.5 nA
- Voltage - Input Offset:
- 5 µV
- Current - Supply:
- 3.7mA (x2 Channels)
- Current - Output / Channel:
- 45 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2227U/2K5E4 FAQ
1.How can I place an order for OPA2227U/2K5E4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2227U/2K5E4 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 OPA2227U/2K5E4 reliable?
The price and inventory of OPA2227U/2K5E4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2227U/2K5E4 is usually 5 days.
3.What payment methods are accepted for OPA2227U/2K5E4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2227U/2K5E4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2227U/2K5E4?
OPA2227U/2K5E4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2227U/2K5E4 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 OPA2227U/2K5E4?
For technical support, including OPA2227U/2K5E4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2227U/2K5E4 requirements.
6.How does Aetrix verify that OPA2227U/2K5E4 is sourced from the original manufacturer or authorized distributors?
All OPA2227U/2K5E4 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 OPA2227U/2K5E4 meets industry standards.
7.What is the process for return or replacement of OPA2227U/2K5E4?
All OPA2227U/2K5E4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2227U/2K5E4, 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 OPA2227U/2K5E4 part is unused and in its original packaging.
Return procedure for OPA2227U/2K5E4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2227U/2K5E4 Tags
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