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Texas Instruments OPA4227PA
- Part No.:
- OPA4227PA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
OPA4227PA.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,183
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Product details
Overview
OPA4227PA from Texas Instruments is a quad, 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. It operates from ±2.5 V to ±18 V supplies and is used in professional audio preamplifiers, vibration analysis front-ends, and high-resolution data acquisition systems.
For engineers reviewing the OPA4227PA datasheet, OPA4227PA pinout, OPA4227PA application, or OPA4227PA equivalent, key selection criteria include its unity-gain stability, 138 dB CMRR, 160 dB open-loop gain, low 10 nA input bias current, and DIP-14 package compatibility with legacy OP-27-based designs.
Technical Context
The OPA4227PA 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 each supply under 10 kΩ load, and it maintains stability without external compensation at unity gain.
It features matched channel separation >110 dB at DC and >80 dB at 1 kHz, enabling simultaneous multi-channel signal conditioning in geophysical sensor arrays and spectral analysis instruments where crosstalk must remain below –100 dB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 3 nV/√Hz at 1 kHz - enables sub-1 µV RMS noise in 20 kHz audio band |
| Gain Bandwidth Product | 8 MHz - supports stable closed-loop gain ≥1 up to 8 MHz signal bandwidth |
| Slew Rate | 2.3 V/µs - ensures <5 µs settling for 10 V step with 0.01% accuracy |
| Input Offset Voltage | ±75 µV max - reduces DC error to <0.0015% of 5 V full-scale in precision instrumentation |
| CMRR | 138 dB - rejects >79 million:1 common-mode interference in unbalanced sensor interfaces |
| Supply Range | ±2.5 V to ±18 V - allows direct interface with ±5 V, ±12 V, or ±15 V industrial power rails |
| Operating Temperature | –40°C to +85°C - qualified for deployment in outdoor telecom equipment and factory-floor DAQ systems |
Pinout & Package
OPA4227PA is supplied in a 14-pin plastic dual in-line package (PDIP) with 19.30 mm × 6.35 mm body size and 2.54 mm lead pitch. The package is through-hole mounted and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Out A) | Output channel A | Amplified signal output for first op amp; drives loads ≥10 kΩ |
| 2 (–In A) | Inverting input channel A | High-impedance node (10⁹ Ω || 3 pF); connects to feedback network |
| 3 (+In A) | Noninverting input channel A | High-impedance node; accepts sensor or reference signals with minimal loading |
| 4 (V+) | Positive supply | Connects to highest potential rail; requires local 0.1 µF decoupling |
| 5 (+In B) | Noninverting input channel B | Independent input for second amplifier; electrically isolated from channel A |
| 6 (–In B) | Inverting input channel B | Independent inverting node; supports separate gain configuration per channel |
| 7 (Out B) | Output channel B | Second independent output; shares no internal nodes with Out A |
| 8 (Out C) | Output channel C | Third independent output; enables three-channel simultaneous sampling |
| 9 (–In C) | Inverting input channel C | Third inverting input; supports differential or single-ended configurations |
| 10 (+In C) | Noninverting input channel C | Third noninverting input; matched performance to channels A and B |
| 11 (V–) | Negative supply | Connects to lowest potential rail; requires local 0.1 µF decoupling |
| 12 (+In D) | Noninverting input channel D | Fourth independent input; completes quad-channel signal path |
| 13 (–In D) | Inverting input channel D | Fourth inverting input; fully isolated for multi-sensor front-end use |
| 14 (Out D) | Output channel D | Fourth independent output; supports four-channel analog processing without multiplexing |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stability | Operates stably with no external compensation at G = 1 - eliminates risk of oscillation in buffer or gain-of-one configurations |
| Laser-trimmed offset | ±75 µV max input offset voltage - reduces calibration burden in 16-bit+ data acquisition systems |
| Low 10 nA input bias current | Minimizes voltage error across high-impedance sources (e.g., piezoelectric sensors or pH electrodes) |
| 138 dB CMRR | Rejects power supply ripple and ground noise in single-supply-derived bipolar systems |
| Quad-channel isolation | Channel separation >110 dB at DC - prevents signal leakage between vibration transducers or EEG electrodes |
Applications
| Professional Audio Preamp | Vibration Analysis Front-End |
|---|---|
Use Scenario: Low-noise microphone preamplification in studio-grade mixing consoles. IC Role / Device Role / Timing Role: Quad-channel voltage amplifier conditioning dynamic and condenser mic signals before ADC. Use Value: 3 nV/√Hz noise floor preserves signal integrity for 24-bit/192 kHz recording without audible hiss. | Use Scenario: Simultaneous acquisition of acceleration signals from four MEMS vibration sensors on rotating machinery. IC Role / Device Role / Timing Role: Four independent precision amplifiers providing matched gain and phase response per sensor channel. Use Value: >110 dB channel separation prevents cross-talk-induced false fault detection in predictive maintenance algorithms. |
| Geophysical Signal Conditioning | High-Resolution Data Acquisition |
Use Scenario: Amplifying weak seismic signals from geophone arrays deployed in oil exploration surveys. IC Role / Device Role / Timing Role: Quad op amp providing low-drift, low-noise gain prior to 24-bit sigma-delta ADC. Use Value: ±0.6 µV/°C max offset drift ensures baseline stability over wide ambient temperature swings in field deployments. | Use Scenario: Front-end amplification in portable battery-powered multimeters and calibration standards. IC Role / Device Role / Timing Role: Precision gain stage with programmable ranges (1×, 10×, 100×) using external resistors. Use Value: ±2.5 V to ±18 V supply flexibility enables operation from single Li-ion cell (via charge pump) or bench supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4228PA | Higher 33 MHz GBW and 11 V/µs slew rate but requires minimum G = 5; not unity-gain stable | Better suited for high-speed active filters or ultrasonic receiver chains where gain ≥5 is fixed | Select OPA4228PA only when closed-loop gain is ≥5 and speed outweighs DC precision needs |
| AD8628ARUZ | Zero-drift architecture; 1 µV max offset, 0.005 µV/°C drift, but 2.5 MHz GBW and higher 4.5 nV/√Hz noise | Preferred for ultra-low-offset DC-coupled applications like medical ECG front-ends where drift dominates error budget | Choose AD8628ARUZ when offset drift <0.01 µV/°C is mandatory and bandwidth ≤2.5 MHz suffices |
Compared with OPA4227PA, OPA4228PA trades unity-gain stability for higher speed, while AD8628ARUZ sacrifices bandwidth and noise performance to achieve near-zero drift - making OPA4227PA the optimal balance for mixed-signal applications requiring both precision and 8 MHz bandwidth.
Availability
OPA4227PA is available at Aetrix Electronics and suitable for professional audio equipment, vibration analysis systems, and geophysical signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA4227PA 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.
The OPAx22x product line was designed specifically for high-fidelity signal conditioning in mixed-signal systems where both low-noise AC performance and precision DC accuracy are simultaneously required.
FAQ
What is the maximum operating supply voltage for OPA4227PA?
The OPA4227PA supports a total supply voltage range of ±2.5 V to ±18 V, with absolute maximum ratings up to ±18 V per rail (36 V total). Operation beyond ±18 V risks permanent damage. The device is fully specified from ±5 V to ±15 V, and key parameters including offset voltage, CMRR, and gain bandwidth remain guaranteed across this range. Always use local 0.1 µF ceramic decoupling capacitors at both V+ and V– pins.
Does OPA4227PA require external compensation for unity-gain operation?
No, OPA4227PA is internally compensated and unity-gain stable. It does not require external compensation components when configured as a voltage follower or in any closed-loop gain ≥1. This eliminates risk of oscillation in buffer stages and simplifies layout in multi-channel systems. The OPA4228PA variant, by contrast, is not unity-gain stable and requires minimum gain of 5.
What is the input offset voltage specification for OPA4227PA over temperature?
The OPA4227PA has a maximum input offset voltage of ±75 µV at 25°C and ±200 µV over the full operating temperature range of –40°C to +85°C. Its offset drift is specified at ±0.6 µV/°C maximum, meaning worst-case drift across the full range contributes ≤102 µV additional error. These values are measured per amplifier in the quad package and apply individually to each channel.
Can OPA4227PA drive capacitive loads directly?
OPA4227PA can drive moderate capacitive loads up to ~100 pF without external isolation resistance. For loads >100 pF, a series resistor (typically 20–100 Ω) should be placed between the output pin and the capacitor to maintain phase margin and prevent peaking or oscillation. The device's typical small-signal overshoot remains <10% with 1500 pF load when gain is ≥10, but stability must be verified per application using layout parasitics and actual load conditions.
How does OPA4227PA compare to the legacy OP-27 in terms of pin compatibility and performance?
OPA4227PA is a direct pin-compatible replacement for quad OP-27 equivalents in PDIP-14 packages, sharing identical pinout and footprint. It improves upon OP-27 with 3 nV/√Hz vs 3.5 nV/√Hz input noise, 8 MHz vs 8 MHz GBW, 2.3 V/µs vs 2.0 V/µs slew rate, and ±75 µV vs ±100 µV max offset voltage. Unlike OP-27, OPA4227PA guarantees performance from ±2.5 V to ±18 V and includes enhanced ESD protection (±2000 V HBM).
OPA4227PA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- Through Hole
- Supplier Device Package:
- 14-PDIP
OPA4227PA FAQ
1.How can I place an order for OPA4227PA through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4227PA 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 OPA4227PA reliable?
The price and inventory of OPA4227PA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4227PA is usually 5 days.
3.What payment methods are accepted for OPA4227PA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4227PA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4227PA?
OPA4227PA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4227PA 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 OPA4227PA?
For technical support, including OPA4227PA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4227PA requirements.
6.How does Aetrix verify that OPA4227PA is sourced from the original manufacturer or authorized distributors?
All OPA4227PA 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 OPA4227PA meets industry standards.
7.What is the process for return or replacement of OPA4227PA?
All OPA4227PA units undergo pre-shipment inspection (PSI). If there is an issue with OPA4227PA, 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 OPA4227PA part is unused and in its original packaging.
Return procedure for OPA4227PA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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