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Texas Instruments OPA2227UA/2K5G4
- Part No.:
- OPA2227UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2227UA/2K5G4.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,155
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Product details
Overview
OPA2227UA/2K5G4 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, enabling use in professional audio preamplifiers, data acquisition front-ends, and spectral analysis instrumentation.
For engineers reviewing the OPA2227UA/2K5G4 datasheet, OPA2227UA/2K5G4 pinout, OPA2227UA/2K5G4 application, or OPA2227UA/2K5G4 equivalent, key selection criteria include its unity-gain stability, SOIC-8 package compatibility, low 10 nA input bias current, and guaranteed performance over ±2.5 V to ±18 V supplies - critical for battery-powered test equipment and high-fidelity signal conditioning.
Technical Context
The OPA2227UA/2K5G4 implements a bipolar-input, fully differential input stage with laser-trimmed thin-film resistors for low offset drift (±0.6 µV/°C max). Its internal compensation ensures unity-gain stability without external components, supporting direct use in transimpedance, active filter, and precision integrator configurations.
It features rail-to-rail output swing limited by ±2 V headroom at 10 kΩ load, common-mode input range from (V–)+2 V to (V+)-2 V, and 138 dB CMRR at DC - enabling accurate differential sensing in noisy industrial environments while maintaining 0.00005% THD+N at 1 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 8 MHz - supports stable closed-loop operation up to 100 kHz with G = 80, suitable for anti-aliasing filters in 200 kSPS ADC systems. |
| Slew Rate | 2.3 V/µs - enables full-scale 10 V step response within 5.6 µs (0.01%), meeting settling requirements for 16-bit DAC buffers. |
| Input Offset Voltage | ±75 µV max - reduces DC error to < 0.0012% of 6 V full-scale, critical for strain gauge bridge amplification. |
| Voltage Noise Density | 3 nV/√Hz @ 1 kHz - contributes < 1.2 µVrms integrated noise in 100 kHz bandwidth, preserving SNR in microphone preamp stages. |
| Supply Range | ±2.5 V to ±18 V - allows direct interface with ±15 V legacy instrumentation rails or ±3.3 V low-power mixed-signal systems. |
| CMRR | 138 dB - rejects > 79 million:1 common-mode interference, essential for ECG front-end designs with high electrode impedance. |
| Quiescent Current | ±3.8 mA per amplifier - enables dual-channel precision amplification in portable devices with < 15 mW total dissipation at ±5 V. |
Pinout & Package
OPA2227UA/2K5G4 is housed in an 8-pin SOIC (SO-8) package measuring 4.90 mm × 3.91 mm, with standard surface-mount footprint and moisture sensitivity level (MSL) 2a per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Out A (Pin 1) | Output channel A | Delivers amplified signal with ±2 V output swing headroom; requires local 0.1 µF decoupling to ground for stability. |
| –In A (Pin 2) | Inverting input channel A | Differential node for feedback networks; sensitive to PCB leakage - must be guarded in high-Z sensor interfaces. |
| +In A (Pin 3) | Noninverting input channel A | High-impedance input (10⁹ Ω || 3 pF); thermally matched layout required to minimize thermal EMF-induced offset drift. |
| V– (Pin 4) | Negative supply rail | Reference for internal biasing; must connect directly to low-impedance ground plane with dedicated trace. |
| +In B (Pin 5) | Noninverting input channel B | Independent second input; shares no internal coupling with Channel A - enables true dual-path signal processing. |
| –In B (Pin 6) | Inverting input channel B | Electrically isolated from Channel A inputs; supports independent gain configuration without crosstalk. |
| Out B (Pin 7) | Output channel B | Matches Out A performance; channel separation > 110 dB at DC ensures minimal inter-channel interference in stereo audio paths. |
| V+ (Pin 8) | Positive supply rail | Power source for internal circuitry; requires 0.1 µF ceramic capacitor placed ≤ 2 mm from pin for high-frequency PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Low input voltage noise | 3 nV/√Hz at 1 kHz enables sub-1 µVrms noise floors in 20 kHz audio bandwidths without cooling. |
| Unity-gain stable architecture | Eliminates need for external compensation components, reducing BOM count and layout complexity in gain-of-one buffers. |
| Laser-trimmed offset | ±75 µV max eliminates manual nulling circuits in production test fixtures and medical sensor calibrations. |
| Wide supply flexibility | Operates from ±2.5 V to ±18 V with consistent specs - supports reuse across 3.3 V IoT nodes and ±15 V lab equipment. |
| High open-loop gain | 160 dB AOL ensures < 0.0001% gain error in 100× inverting amplifiers, critical for precision weigh scale bridges. |
Applications
| Professional Audio Preamp | Data Acquisition Front-End |
|---|---|
Use Scenario: Low-noise microphone signal conditioning in studio-grade audio interfaces. IC Role / Device Role / Timing Role: Dual-channel voltage amplifier with independent gain control per channel for stereo L/R paths. Use Value: 3 nV/√Hz input noise preserves dynamic range > 110 dB(A), while 8 MHz bandwidth supports ultrasonic content up to 40 kHz. | Use Scenario: High-resolution sensor signal amplification in portable environmental monitors. IC Role / Device Role / Timing Role: Dual-channel programmable-gain amplifier driving 16-bit SAR ADC inputs. Use Value: ±75 µV offset ensures < 0.001% full-scale error at 5 V range; ±3.8 mA IQ enables > 24-hour battery life on two AA cells. |
| Vibration Analysis Instrumentation | Spectral Analysis Filter Bank |
Use Scenario: Piezoelectric accelerometer signal conditioning in predictive maintenance sensors. IC Role / Device Role / Timing Role: Charge amplifier and anti-aliasing filter driver with matched dual channels. Use Value: 138 dB CMRR rejects motor drive noise; 2.3 V/µs slew rate handles 5 kHz resonance peaks without distortion. | Use Scenario: Multi-band analog filter bank for real-time frequency-domain analysis in spectrum analyzers. IC Role / Device Role / Timing Role: Dual-channel active bandpass filter section with precise center frequency control. Use Value: 8 MHz GBW supports Q > 50 at 100 kHz without peaking; channel separation > 110 dB prevents inter-band leakage. |
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 |
|---|---|---|---|
| OPA2227U | Same silicon die, identical electrical specs, but in PDIP-8 package (9.81 mm × 6.35 mm) with through-hole mounting. | Preferred for prototyping, breadboarding, or legacy through-hole PCBs where reflow soldering is unavailable. | Select OPA2227U when mechanical mounting constraints require DIP packaging or hand-soldering capability. |
| OPA227UA | Single-channel variant with identical per-amplifier specs, same SOIC-8 footprint, and pin-compatible pinout (non-inverting/inverting/output/supply pins aligned). | Used when only one precision channel is needed, allowing space savings or dual placement for redundancy. | Choose OPA227UA to reduce channel count without redesigning layout - shares thermal and decoupling design rules. |
Compared with OPA2227U and OPA227UA, the OPA2227UA/2K5G4 provides optimal cost-per-channel in surface-mount production, retains full dual-channel functionality in compact SOIC-8, and avoids DIP thermal limitations or single-channel board area inefficiency.
Availability
OPA2227UA/2K5G4 is available at Aetrix Electronics and suitable for professional audio equipment, portable data acquisition systems, and vibration analysis instrumentation requiring stable component supply and long-term manufacturability.
Supply support for OPA2227UA/2K5G4 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 over 50 years of innovation in precision signal chain solutions.
The OPAx22x product line was engineered specifically for high-fidelity measurement systems demanding simultaneous low noise, wide bandwidth, and DC accuracy - targeting audio, test & measurement, and scientific instrumentation markets.
FAQ
What is the maximum operating temperature range for OPA2227UA/2K5G4?
The OPA2227UA/2K5G4 is specified for operation from –40°C to +85°C ambient temperature, with absolute maximum junction temperature rated at 150°C. Electrical characteristics including offset voltage, CMRR, and gain bandwidth are guaranteed across this full industrial temperature range, making it suitable for deployment in uncontrolled environments such as field-deployed environmental sensors or automotive cabin test gear.
Does OPA2227UA/2K5G4 require external compensation capacitors?
No, the OPA2227UA/2K5G4 is internally compensated for unity-gain stability and does not require external compensation capacitors. Its design eliminates the need for external phase compensation networks, simplifying layout and ensuring stable operation in gain-of-one buffer, inverting amplifier, and active filter configurations without risk of oscillation - a key advantage over non-compensated precision op-amps like the OPA228 family.
Can OPA2227UA/2K5G4 drive capacitive loads directly?
The OPA2227UA/2K5G4 can drive moderate capacitive loads up to 100 pF stably with proper PCB layout and local 0.1 µF supply decoupling. For loads exceeding 100 pF - such as ADC input capacitors or long cables - a series isolation resistor (typically 20–100 Ω) between the output and load is recommended to maintain phase margin and prevent peaking or ringing, as confirmed in Figure 26 of the SBOS110B datasheet.
How does the input offset voltage drift behave over temperature for OPA2227UA/2K5G4?
The OPA2227UA/2K5G4 exhibits a maximum input offset voltage drift of ±0.6 µV/°C over the –40°C to +85°C range, with typical distribution centered near ±0.3 µV/°C (Figure 11). This low drift ensures that offset error remains below ±50 µV over a 60°C ambient shift - critical for multi-decade DC-coupled applications like precision weigh scales or thermocouple amplifiers where calibration intervals exceed six months.
Is OPA2227UA/2K5G4 pin-compatible with industry-standard op-amps?
Yes, the OPA2227UA/2K5G4 is a pin-for-pin replacement for the OP-27 and LT1007 dual variants in SOIC-8 packages, as explicitly stated in the TI datasheet (SBOS110B, Section 1). Its Pin 1–8 assignment matches standard dual op-amp conventions: Out A, –In A, +In A, V–, +In B, –In B, Out B, V+, enabling drop-in upgrades with improved noise (3 nV/√Hz vs 3.5 nV/√Hz for OP-27) and wider bandwidth (8 MHz vs 8 MHz, but with superior phase margin).
OPA2227UA/2K5G4 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:
- 10 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
OPA2227UA/2K5G4 FAQ
1.How can I place an order for OPA2227UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2227UA/2K5G4 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 OPA2227UA/2K5G4 reliable?
The price and inventory of OPA2227UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2227UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA2227UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2227UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2227UA/2K5G4?
OPA2227UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2227UA/2K5G4 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 OPA2227UA/2K5G4?
For technical support, including OPA2227UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2227UA/2K5G4 requirements.
6.How does Aetrix verify that OPA2227UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA2227UA/2K5G4 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 OPA2227UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA2227UA/2K5G4?
All OPA2227UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2227UA/2K5G4, 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 OPA2227UA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA2227UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2227UA/2K5G4 Tags
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