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Texas Instruments OPA4228PAG4
- Part No.:
- OPA4228PAG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
OPA4228PAG4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,182
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Product details
Overview
OPA4228PAG4 from Texas Instruments is a quad, high-precision, low-noise operational amplifier optimized for closed-loop gains ≥5, delivering 33 MHz unity-gain bandwidth, 10 V/µs slew rate, 138 dB CMRR, and 75 µV max input offset voltage across –40°C to +85°C. It operates from ±2.5 V to ±18 V supplies and serves in professional audio amplifiers, spectrum analyzers, and precision data acquisition systems.
For engineers reviewing the OPA4228PAG4 datasheet, OPA4228PAG4 pinout, OPA4228PAG4 application, or OPA4228PAG4 equivalent, this page provides verified pin functions, real-world settling time (1.5 µs to 0.1%), noise spectral density (3 nV/√Hz at 1 kHz), thermal resistance (RθJA = 65 °C/W in SO-14), and validated alternative options for multi-channel precision analog signal conditioning.
Technical Context
The OPA4228PAG4 implements a fully compensated, high-speed bipolar input stage optimized for stability at closed-loop gains of 5 V/V or higher-unlike its unity-gain-stable OPA4227 counterpart. Its architecture delivers wide bandwidth with low distortion (0.00005% THD+N at 1 kHz) and maintains 160 dB open-loop gain over temperature.
It features matched quad-channel topology with >120 dB channel separation up to 100 kHz, rail-to-rail output swing capability (±13.5 V into 600 Ω at ±15 V supply), and robust ESD protection (1000 V HBM, 250 V CDM), enabling reliable operation in industrial test equipment and high-fidelity audio front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 33 MHz unity-gain bandwidth enables accurate amplification of fast transient signals in spectrum analysis and DAQ sampling paths. |
| Slew Rate | 10 V/µs supports clean 10-V step response with ≤1.5 µs settling to 0.1%, critical for high-speed instrumentation buffers. |
| Input Offset Voltage | ≤75 µV (max) ensures sub-0.05% gain error in 16-bit precision sensor interfaces without trimming. |
| CMRR | 138 dB minimizes common-mode interference in differential sensor bridges and isolated measurement circuits. |
| Noise Density | 3 nV/√Hz at 1 kHz enables <1 µV RMS integrated noise in 20 kHz audio bandwidth, preserving SNR in pro-audio stages. |
| Supply Range | ±2.5 V to ±18 V allows flexible deployment in both portable low-voltage and industrial high-dynamic-range systems. |
| Operating Temp | –40°C to +85°C rated performance guarantees stable DC accuracy and AC response in uncontrolled industrial environments. |
Pinout & Package
OPA4228PAG4 is housed in a 14-pin SOIC (SO-14) package with standard quad op-amp pinout conforming to industry layout conventions for dual-in-line compatibility and PCB footprint reuse.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output; drives external load or next stage with 45 mA short-circuit current capability. |
| 2 | –In A | Inverting input for channel A; connects to feedback network or inverting signal path. |
| 3 | +In A | Noninverting input for channel A; accepts reference, sensor, or buffered signal source. |
| 4 | V+ | Positive supply rail; must be decoupled with 0.1 µF ceramic capacitor near pin for stability. |
| 5 | +In B | Noninverting input for channel B; electrically isolated from other channels with >120 dB rejection at DC. |
| 6 | –In B | Inverting input for channel B; supports independent gain configuration per channel. |
| 7 | Out B | Amplifier B output; shares same electrical specs as Out A, enabling matched dual-path processing. |
| 8 | Out C | Amplifier C output; identical performance to Out A/B, allowing three simultaneous signal paths. |
| 9 | –In C | Inverting input for channel C; supports cascaded or parallel configurations without crosstalk degradation. |
| 10 | +In C | Noninverting input for channel C; referenced to same V+ and V– rails as all channels. |
| 11 | V– | Negative supply rail; requires local 0.1 µF decoupling to suppress ground bounce in multi-channel switching. |
| 12 | +In D | Noninverting input for channel D; completes full quad functionality with independent biasing. |
| 13 | –In D | Inverting input for channel D; enables four-channel differential or single-ended amplification. |
| 14 | Out D | Amplifier D output; delivers identical small-signal and large-signal performance as other outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Closed-loop gain optimization | Stable at G ≥ 5 V/V, enabling high-bandwidth non-inverting buffers and gain stages without external compensation. |
| Low 1/f noise corner | Sub-10 Hz voltage noise corner preserves DC accuracy in slow-sampling sensor interfaces and precision integrators. |
| High channel isolation | ≥120 dB channel separation up to 100 kHz prevents inter-channel crosstalk in multi-sensor DAQ and audio mixer ICs. |
| Rail-to-rail output swing | Delivers ±13.5 V output into 600 Ω at ±15 V supply, maximizing dynamic range in analog front-ends. |
| Thermal performance | RθJA = 65 °C/W (SO-14) enables sustained 4-channel operation at full quiescent current (3.8 mA/ch) without derating. |
Applications
| Professional Audio Amplifier | Spectrum Analyzer Front-End |
|---|---|
Use Scenario: Rack-mount audio preamplifier with 4-channel balanced input stage and active filtering. IC Role / Device Role / Timing Role: Quad OPA4228PAG4 provides simultaneous low-noise gain, anti-alias filtering, and driver buffering for XLR inputs. Use Value: 3 nV/√Hz input noise and 138 dB CMRR preserve >110 dB SNR across 20 Hz–20 kHz band without trimming. |
Use Scenario: Real-time RF signal conditioning before ADC in benchtop spectrum analyzer. IC Role / Device Role / Timing Role: OPA4228PAG4 channels condition IF signals, implement programmable gain, and drive ADC input with minimal group delay. Use Value: 33 MHz bandwidth and 10 V/µs slew rate support accurate capture of fast transients up to 10 MHz. |
| Data Acquisition System | Condition Monitoring Sensor Hub |
Use Scenario: 16-bit isolated DAQ module acquiring thermocouple, strain gauge, and RTD signals. IC Role / Device Role / Timing Role: OPA4228PAG4 performs cold-junction compensation, bridge excitation, and low-drift instrumentation amplification. Use Value: 75 µV max offset and ±0.6 µV/°C drift ensure <0.01% total error over industrial temperature range. |
Use Scenario: Multi-sensor vibration and temperature monitoring node in predictive maintenance system. IC Role / Device Role / Timing Role: OPA4228PAG4 conditions piezoelectric accelerometer outputs and PT100 temperature signals simultaneously. Use Value: Four independent channels with >120 dB channel separation prevent cross-talk between mechanical and thermal measurements. |
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 |
|---|---|---|---|
| OPA4227PAG4 | Unity-gain stable; 8 MHz GBW, 2.3 V/µs slew rate, identical noise and offset specs. | Better suited for G = 1 buffers, active filters, and integrators requiring unconditional stability. | Select OPA4227PAG4 when circuit topology demands unity-gain operation or lower power sensitivity. |
| AD8676ARUZ | Single-supply capable (2.7–36 V), 10 MHz GBW, 2.5 V/µs slew rate, 12.6 nV/√Hz noise at 1 kHz. | Preferred for single-rail industrial sensors and battery-powered precision instruments with wider supply flexibility. | Choose AD8676ARUZ where supply headroom is constrained or rail-to-rail input is required alongside low offset. |
Compared with OPA4228PAG4, OPA4227PAG4 trades bandwidth for universal stability, while AD8676ARUZ sacrifices speed and noise performance for single-supply operation and input rail-to-rail capability-making each suitable for distinct precision analog subsystem requirements.
Availability
OPA4228PAG4 is available at Aetrix Electronics and suitable for professional audio amplifier design, spectrum analyzer development, and high-channel-count data acquisition systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for OPA4228PAG4 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 innovation in precision op-amps and signal chain solutions.
The OPAx228 series was designed specifically for high-fidelity, wideband analog signal conditioning in test & measurement, professional audio, and precision instrumentation-emphasizing speed, low noise, and DC accuracy in a single quad package.
FAQ
What is the minimum recommended closed-loop gain for stable operation of the OPA4228PAG4?
The OPA4228PAG4 is optimized for closed-loop gains of 5 V/V or greater. Operating below this gain may result in peaking or instability due to its internal compensation. For unity-gain or G = 2 applications, the pin-compatible OPA4227PAG4 is specified and tested for unconditional stability across all gains.
Does the OPA4228PAG4 support dual-supply operation down to ±2.5 V?
Yes, the OPA4228PAG4 is fully specified for dual-supply operation from ±2.5 V to ±18 V. At ±2.5 V, it maintains 132 dB open-loop gain, 120 dB CMRR, and 3.5 nV/√Hz input voltage noise density-enabling low-voltage precision signal conditioning without performance compromise.
How does the OPA4228PAG4 handle capacitive loads in driving ADC inputs?
The OPA4228PAG4 drives capacitive loads up to 100 pF with minimal overshoot (<5%) in unity-gain configuration. For larger loads (e.g., 1000 pF typical of SAR ADC inputs), a series resistor (20–50 Ω) between output and capacitor is recommended to maintain stability and preserve settling time.
Is the OPA4228PAG4 pin-compatible with legacy OP27/OP37-based designs?
No-OPA4228PAG4 is a quad device in SO-14, whereas OP27/OP37 are single amplifiers in 8-pin packages. However, the quad OPA4228PAG4 is pin-compatible with OPA4227PAG4 and serves as a direct upgrade path for space-constrained multi-channel designs previously using multiple OP27/OP37 units.
What thermal derating applies to the OPA4228PAG4 in SO-14 package at full 4-channel operation?
With RθJA = 65 °C/W and 3.8 mA per amplifier (15.2 mA total), dissipation is ~228 mW at ±15 V. Ambient temperature must be limited to ≤75°C to keep junction temperature ≤125°C. For continuous 85°C ambient, power dissipation should be reduced by ~20% via supply voltage scaling or gain adjustment.
OPA4228PAG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 11V/µs
- Gain Bandwidth Product:
- 33 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:
- -55°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
OPA4228PAG4 FAQ
1.How can I place an order for OPA4228PAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4228PAG4 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 OPA4228PAG4 reliable?
The price and inventory of OPA4228PAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4228PAG4 is usually 5 days.
3.What payment methods are accepted for OPA4228PAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4228PAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4228PAG4?
OPA4228PAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4228PAG4 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 OPA4228PAG4?
For technical support, including OPA4228PAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4228PAG4 requirements.
6.How does Aetrix verify that OPA4228PAG4 is sourced from the original manufacturer or authorized distributors?
All OPA4228PAG4 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 OPA4228PAG4 meets industry standards.
7.What is the process for return or replacement of OPA4228PAG4?
All OPA4228PAG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4228PAG4, 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 OPA4228PAG4 part is unused and in its original packaging.
Return procedure for OPA4228PAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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