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Texas Instruments OPA4227UA/2K5G4
- Part No.:
- OPA4227UA/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4227UA/2K5G4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,107
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Product details
Overview
OPA4227UA/2K5G4 from Texas Instruments is a quad-channel, high-precision, low-noise operational amplifier optimized for AC and precision DC applications. It delivers 3 nV/√Hz input 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, making it suitable for professional audio signal conditioning and spectral analysis front-ends.
For engineers reviewing the OPA4227UA/2K5G4 datasheet, OPA4227UA/2K5G4 pinout, OPA4227UA/2K5G4 application, or OPA4227UA/2K5G4 equivalent, key selection criteria include its unity-gain stability, SOIC-14 package compatibility, low 10 nA input bias current, and guaranteed performance over ±2.5 V to ±18 V supplies.
Technical Context
The OPA4227UA/2K5G4 implements a bipolar input stage with laser-trimmed thin-film resistors for precision offset and drift control. Its fully differential architecture supports rail-to-rail output swing within ±2 V of supply rails at 10 kΩ load, while maintaining >132 dB open-loop gain and >120 dB CMRR up to 1 kHz.
It operates as a unity-gain stable voltage-feedback amplifier with internal compensation, eliminating external phase compensation requirements. The device features no output phase reversal under common-mode overload and includes robust ESD protection (±2000 V HBM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 3 nV/√Hz at 1 kHz - enables high-fidelity signal amplification in low-level sensor interfaces |
| Gain Bandwidth Product | 8 MHz - supports stable closed-loop operation up to 100 kHz with G ≥ 10 |
| Slew Rate | 2.3 V/µs - ensures <5.6 µs settling to 0.01% for 10 V step with 100 pF load |
| Input Offset Voltage | ±75 µV max - reduces DC error in precision instrumentation and data acquisition |
| Supply Voltage Range | ±2.5 V to ±18 V - allows flexible dual-supply operation in industrial and audio systems |
| Common-Mode Rejection | 138 dB typ - rejects power supply ripple and interference in noisy environments |
| Quiescent Current | ±3.8 mA per amplifier - balances low power with high AC performance for portable precision gear |
Pinout & Package
OPA4227UA/2K5G4 is housed in a 14-pin SOIC (SO-14) package measuring 8.65 mm × 3.91 mm, optimized for surface-mount assembly and thermal performance (θJA = 65 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Out A) | Output channel A | Amplified output of first op amp; drives loads up to ±45 mA |
| 2 (–In A) | Inverting input A | Differential input node for channel A; high-impedance (10⁹ Ω || 3 pF) |
| 3 (+In A) | Noninverting input A | Differential input node for channel A; matched impedance to Pin 2 |
| 4 (V+) | Positive supply | Highest potential rail; accepts up to +18 V relative to V– |
| 5 (+In B) | Noninverting input B | Input for second amplifier; electrically isolated from other channels |
| 6 (–In B) | Inverting input B | Input for second amplifier; maintains >110 dB channel separation at DC |
| 7 (Out B) | Output channel B | Second independent output; identical AC/DC specs to Out A |
| 8 (Out C) | Output channel C | Third output; enables compact multi-stage filtering or signal routing |
| 9 (–In C) | Inverting input C | Input for third amplifier; supports independent gain configuration |
| 10 (+In C) | Noninverting input C | Input for third amplifier; referenced to same V+ and V– as all channels |
| 11 (V–) | Negative supply | Lowest potential rail; accepts down to –18 V relative to V+ |
| 12 (+In D) | Noninverting input D | Input for fourth amplifier; completes full quad functionality |
| 13 (–In D) | Inverting input D | Input for fourth amplifier; supports independent feedback networks |
| 14 (Out D) | Output channel D | Fourth output; enables simultaneous processing of four analog signals |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stability | Internally compensated for stable operation at G = 1 without external components |
| No output phase reversal | Prevents signal inversion during common-mode overdrive, critical in active filter stages |
| Laser-trimmed offset | ±75 µV max ensures minimal calibration burden in high-accuracy measurement systems |
| Wide supply range | Operates from ±2.5 V to ±18 V - supports both low-voltage portable and high-dynamic-range industrial designs |
| Low 10 nA input bias current | Minimizes voltage error across high-impedance sensor sources (e.g., piezoelectric transducers) |
Applications
| Professional Audio Equipment | Spectral Analysis Systems |
|---|---|
Use Scenario: Low-noise preamplification of microphone and line-level signals in mixing consoles and audio interfaces. IC Role / Device Role / Timing Role: Quad-channel voltage amplifier providing simultaneous gain, filtering, and buffering for stereo L/R plus auxiliary channels. Use Value: 3 nV/√Hz noise floor preserves signal integrity across 20 Hz–20 kHz bandwidth without audible hiss. | Use Scenario: Signal conditioning front-end for FFT-based vibration and geophysical analyzers. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier stage preceding ADC sampling, rejecting power supply noise via 138 dB CMRR. Use Value: ±75 µV offset and 0.6 µV/°C drift ensure stable baseline over temperature for accurate amplitude/frequency mapping. |
| Data Acquisition Front-Ends | Active Filter Banks |
Use Scenario: Multi-channel sensor signal conditioning in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Four independent amplifiers performing gain, level-shifting, and anti-aliasing drive for successive-approximation ADCs. Use Value: Channel separation >110 dB prevents crosstalk between simultaneously sampled channels. | Use Scenario: Implementation of 4-pole Sallen-Key or state-variable filters in telecom test equipment. IC Role / Device Role / Timing Role: Quad op amp configured as two 2nd-order sections, leveraging unity-gain stability and 8 MHz GBW. Use Value: 2.3 V/µs slew rate supports clean transient response up to 100 kHz corner frequencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4228UA/2K5 | Higher 33 MHz GBW and 11 V/µs slew rate; requires minimum G = 5 for stability | Better suited for high-speed closed-loop gain ≥5 applications (e.g., active equalizers), not unity-gain buffers | Select OPA4228UA/2K5 only when bandwidth >10 MHz and gain ≥5 are required; not drop-in for OPA4227UA/2K5G4 |
| AD8629ARZ-REEL | Rail-to-rail input/output, lower 1.5 nV/√Hz noise, but only 2.5 MHz GBW and 1 V/µs slew rate | Preferred for low-voltage (±2.5 V) single-supply systems where rail-sensing is essential | Choose AD8629ARZ-REEL for battery-powered instrumentation needing RRO and ultra-low noise below 1 MHz |
Compared with OPA4227UA/2K5G4, OPA4228UA/2K5 trades unity-gain stability for higher speed, while AD8629ARZ-REEL sacrifices bandwidth for rail-to-rail operation and lower noise at sub-MHz frequencies - each serves distinct precision analog design constraints.
Availability
OPA4227UA/2K5G4 is available at Aetrix Electronics and suitable for professional audio equipment, spectral analysis systems, and data acquisition front-ends requiring stable component supply, long-term manufacturability, and guaranteed parametric performance across –40°C to 85°C.
Supply support for OPA4227UA/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 delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The OPAx22x product line was designed specifically for high-fidelity analog signal chains demanding simultaneous low noise, wide bandwidth, and precision DC accuracy - targeting audio, test & measurement, and scientific instrumentation.
FAQ
What is the maximum operating supply voltage for OPA4227UA/2K5G4?
The OPA4227UA/2K5G4 supports a total supply voltage range of ±2.5 V to ±18 V, meaning the absolute maximum difference between V+ and V– is 36 V. Operation at ±18 V is fully specified across –40°C to 85°C, with electrical characteristics guaranteed per the datasheet's Recommended Operating Conditions table. Exceeding ±18 V risks permanent damage.
Does OPA4227UA/2K5G4 require external compensation capacitors?
No, the OPA4227UA/2K5G4 is internally compensated and unity-gain stable - no external compensation capacitors are needed for stable operation at any closed-loop gain ≥1. This simplifies PCB layout and eliminates tuning effort. However, 0.1-μF decoupling capacitors placed close to V+ and V– pins are recommended to suppress high-frequency supply noise.
Can OPA4227UA/2K5G4 drive capacitive loads directly?
The OPA4227UA/2K5G4 can drive moderate capacitive loads (≤100 pF) without instability, but larger loads require isolation resistance (e.g., 10–100 Ω in series with the output) to maintain phase margin. Typical Characteristics show overshoot increases significantly above 100 pF at G = 1; for 1500 pF loads, a series resistor and/or feedback capacitor network is necessary to preserve stability and settling time.
What is the input common-mode voltage range of OPA4227UA/2K5G4?
The input common-mode voltage range for OPA4227UA/2K5G4 is (V–) + 2 V to (V+) – 2 V under standard operating conditions. For example, with ±15 V supplies, inputs must stay within –13 V to +13 V. This range is independent of output swing and remains valid across the full –40°C to 85°C temperature range, ensuring reliable operation in precision DC-coupled circuits.
How does OPA4227UA/2K5G4 compare to the legacy OP-27 in terms of noise and bandwidth?
The OPA4227UA/2K5G4 improves upon the OP-27 with identical 3 nV/√Hz input voltage noise but adds 8 MHz gain bandwidth (vs OP-27's 8 MHz typical) and 2.3 V/µs slew rate (vs OP-27's 2.8 V/µs). Crucially, OPA4227UA/2K5G4 offers superior DC precision: ±75 µV max offset (vs OP-27's ±100 µV) and ±0.6 µV/°C drift (vs OP-27's ±1.5 µV/°C), making it a direct, enhanced replacement.
OPA4227UA/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- 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 (x4 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:
- 14-SOIC
OPA4227UA/2K5G4 FAQ
1.How can I place an order for OPA4227UA/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4227UA/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 OPA4227UA/2K5G4 reliable?
The price and inventory of OPA4227UA/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4227UA/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA4227UA/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4227UA/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4227UA/2K5G4?
OPA4227UA/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4227UA/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 OPA4227UA/2K5G4?
For technical support, including OPA4227UA/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4227UA/2K5G4 requirements.
6.How does Aetrix verify that OPA4227UA/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA4227UA/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 OPA4227UA/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA4227UA/2K5G4?
All OPA4227UA/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4227UA/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 OPA4227UA/2K5G4 part is unused and in its original packaging.
Return procedure for OPA4227UA/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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