My Inquiry
My Account
Texas Instruments OPA4227UAG4
- Part No.:
- OPA4227UAG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4227UAG4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,123
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA4227UAG4 from Texas Instruments is a quad-channel, high-precision, low-noise operational amplifier optimized for unity-gain stability, delivering 8 MHz bandwidth, 2.3 V/µs slew rate, ≤75 µV input offset voltage, and 3 nV/√Hz input voltage noise density - used in precision data acquisition front-ends, spectrum analyzer signal conditioning, and professional audio preamplifier stages.
For engineers reviewing the OPA4227UAG4 datasheet, OPA4227UAG4 pinout, OPA4227UAG4 application, or OPA4227UAG4 equivalent, key selection criteria include guaranteed low offset drift (±0.6 µV/°C), wide dual-supply range (±2.5 V to ±18 V), high CMRR (138 dB), rail-to-rail output swing capability, and SO-14 package compatibility with industrial temperature operation (–40°C to +85°C).
Technical Context
The OPA4227UAG4 implements a precision bipolar input stage with internal offset trim capability, enabling stable DC-coupled operation in high-gain sensor interfaces. Its unity-gain stability eliminates external compensation requirements, while its 138 dB common-mode rejection and 160 dB open-loop gain support accurate differential signal amplification in noisy environments.
Designed for mixed-signal systems requiring both AC fidelity and DC accuracy, the device maintains low 15 nVRMS (0.1 Hz–10 Hz) and 3 nV/√Hz (1 kHz) voltage noise across its full operating temperature range, with channel separation exceeding 120 dB at 1 kHz - critical for multi-channel instrumentation where crosstalk must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 8 MHz unity-gain bandwidth enables accurate amplification of signals up to audio and low-RF frequencies without phase degradation. |
| Slew Rate | 2.3 V/µs supports fast transient response in precision DAC buffers and active filter stages without slewing-induced distortion. |
| Input Offset Voltage | ≤75 µV (max) ensures minimal DC error in 16-bit+ data acquisition systems without software calibration. |
| CMRR | 138 dB minimizes interference from power supply ripple and shared ground noise in multi-amplifier PCB layouts. |
| Supply Range | ±2.5 V to ±18 V allows flexible integration into legacy industrial systems using ±15 V rails or low-voltage portable designs. |
| Operating Temp | –40°C to +85°C rated performance guarantees consistent offset, noise, and gain behavior across industrial ambient conditions. |
| Quiescent Current | 3.8 mA per amplifier balances precision performance with thermal management in dense quad-channel layouts. |
Pinout & Package
OPA4227UAG4 is housed in a 14-pin SOIC (SO-14) surface-mount package with standard quad op-amp pin configuration and exposed pad not present. Thermal resistance RθJA is 65 °C/W, supporting reliable operation at full load under natural convection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output; drives loads ≥600 Ω with ±3.5 V swing from rails under full supply. |
| 2 | –In A | Inverting input for channel A; matched impedance to +In A enables precision differential gain configurations. |
| 3 | +In A | Noninverting input for channel A; high 1 GΩ common-mode input impedance minimizes loading on high-Z sensors. |
| 4 | V+ | Positive supply rail connection; requires local 0.1 µF ceramic decoupling to suppress high-frequency supply noise. |
| 5 | +In B | Noninverting input for channel B; electrically isolated from other channels to maintain >120 dB channel separation. |
| 6 | –In B | Inverting input for channel B; pin-compatible with industry-standard quad op-amp footprints including LM324 and TL074. |
| 7 | Out B | Amplifier B output; identical AC/DC specs to Out A, enabling matched dual-channel signal paths. |
| 8 | Out C | Amplifier C output; shares same die substrate as A/B/D but maintains independent biasing for low inter-channel drift coupling. |
| 9 | –In C | Inverting input for channel C; supports simultaneous multi-channel synchronous sampling when driven by common reference. |
| 10 | +In C | Noninverting input for channel C; layout symmetry with pins 2/3/5/6 reduces thermal gradient-induced offset mismatch. |
| 11 | V– | Negative supply rail connection; referenced to system ground in single-supply configurations with appropriate level-shifting. |
| 12 | +In D | Noninverting input for channel D; enables four independent precision gain stages on a single IC, reducing BOM count and board area. |
| 13 | –In D | Inverting input for channel D; supports fully differential output topologies when paired with complementary feedback networks. |
| 14 | Out D | Amplifier D output; specified for same settling time (5 µs to 0.1%) and overload recovery (1.3 µs) as other channels. |
Key Features
| Feature | Design Value |
|---|---|
| Low 1/f noise | 90 nVPP (0.1–10 Hz) enables stable DC-coupled amplification of microvolt-level sensor outputs without notch filtering. |
| High open-loop gain | 160 dB ensures <0.001% gain error in 100× closed-loop configurations, critical for calibrated measurement systems. |
| Input bias current | ≤10 nA (max) prevents significant voltage drop across high-impedance source networks (>1 MΩ), preserving signal integrity. |
| Channel separation | >120 dB at 1 kHz isolates adjacent amplifier channels in multi-channel DAQ, preventing cross-talk in spectral analysis. |
| Unity-gain stability | No external compensation required simplifies design of gain-of-1 buffers, integrators, and active filters without risk of oscillation. |
Applications
| Data Acquisition Front-End | Spectrum Analyzer Signal Path |
|---|---|
Use Scenario: Amplifying low-level thermocouple or strain gauge outputs prior to 24-bit sigma-delta ADC conversion in industrial PLC modules. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier stage with programmable gain, providing offset correction and noise filtering. Use Value: ≤75 µV offset and 3 nV/√Hz noise preserve sub-µV resolution; 138 dB CMRR rejects common-mode noise from motor drives sharing the same chassis ground. | Use Scenario: Conditioning IF signals in benchtop spectrum analyzers before logarithmic amplifier and envelope detection stages. IC Role / Device Role / Timing Role: Low-distortion, wide-bandwidth gain block in heterodyne receiver chain, maintaining amplitude fidelity across 100 kHz–10 MHz span. Use Value: 8 MHz GBW and 2.3 V/µs slew rate enable linear amplification of fast-rising RF envelope signals; THD+N <0.00005% prevents harmonic artifacts in displayed spectra. |
| Professional Audio Preamp | Industrial AC-DC Sensor Monitoring |
Use Scenario: Low-noise microphone preamplifier in rack-mount audio interfaces handling dynamic and condenser mics simultaneously. IC Role / Device Role / Timing Role: First-stage gain block with phantom power isolation, DC-blocking, and selectable gain (20–60 dB) via external resistors. Use Value: 3 nV/√Hz input noise ensures >120 dB A-weighted SNR; quad configuration allows independent channel processing without inter-channel crosstalk. | Use Scenario: Isolating and scaling current-sense signals from IGBT gate drivers in industrial AC-DC converters for real-time fault detection. IC Role / Device Role / Timing Role: High-CMRR difference amplifier converting shunt voltage to ground-referenced logic-level signal for MCU ADC input. Use Value: 138 dB CMRR rejects switching noise riding on high-side shunt; ±18 V supply tolerance accommodates wide input voltage transients during overloads. |
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 |
|---|---|---|---|
| OPA4228UAG4 | Higher 33 MHz bandwidth and 10 V/µs slew rate, but requires minimum closed-loop gain ≥5; not unity-gain stable. | Better suited for high-speed active filters and wideband signal chains where gain ≥5 is fixed; unsuitable for unity-gain buffers or integrators. | Select OPA4228UAG4 only when bandwidth >8 MHz is mandatory and circuit topology guarantees G ≥5; otherwise OPA4227UAG4 provides broader design flexibility. |
| OPA4188AIDR | Zero-drift architecture achieves 0.03 µV/°C drift vs. ±0.6 µV/°C for OPA4227UAG4; lower 10 MHz GBW and 0.8 V/µs slew rate. | Ideal for ultra-stable DC measurements (e.g., weigh scales, medical ECG front-ends); insufficient speed for audio or spectrum analysis. | Choose OPA4188AIDR when long-term DC accuracy dominates; retain OPA4227UAG4 when combined AC+DC performance is required. |
Compared with OPA4228UAG4 and OPA4188AIDR, the OPA4227UAG4 uniquely balances unity-gain stability, 8 MHz bandwidth, and 3 nV/√Hz noise - making it the optimal choice for general-purpose precision instrumentation where both transient fidelity and DC accuracy are non-negotiable.
Availability
OPA4227UAG4 is available at Aetrix Electronics and suitable for data acquisition systems, spectrum analyzer signal conditioning, and professional audio amplifier (rack mount) applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for OPA4227UAG4 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 heritage in precision op-amp design and manufacturing.
The OPAx227 series was developed specifically for high-fidelity instrumentation systems demanding simultaneous low noise, high DC accuracy, and robust AC performance - targeting test & measurement, industrial automation, and professional audio markets.
FAQ
What is the maximum supply voltage rating for the OPA4227UAG4?
The OPA4227UAG4 supports a maximum dual-supply voltage of ±18 V (36 V total), with absolute maximum ratings specifying continuous operation up to ±18 V. Exceeding this may cause permanent damage. Operation is fully specified from ±2.5 V to ±15 V, with extended functionality validated to ±18 V under recommended conditions - critical for industrial systems with wide input voltage tolerances.
Does the OPA4227UAG4 require external compensation capacitors?
No, the OPA4227UAG4 is internally compensated for unity-gain stability and does not require external compensation capacitors. This eliminates layout sensitivity and potential instability risks in gain-of-1 configurations such as voltage followers or active filters. The device remains stable with capacitive loads up to 100 pF without added series resistance.
What is the typical input voltage noise density of the OPA4227UAG4 at 1 kHz?
The typical input voltage noise density of the OPA4227UAG4 at 1 kHz is 3 nV/√Hz, matching the value specified for the entire OPAx227 family. This low noise floor is maintained across temperature and supply variations, enabling high-resolution signal amplification in sensitive measurement applications without additional noise filtering.
Can the OPA4227UAG4 drive a 600 Ω load effectively?
Yes, the OPA4227UAG4 delivers ±3.5 V output swing into a 600 Ω load at ±15 V supplies, with full specification compliance across –40°C to +85°C. Its ±45 mA short-circuit current capability and 27 Ω open-loop output impedance ensure stable driving of moderate-impedance loads common in audio line-driving and test equipment interfaces.
How does the OPA4227UAG4 compare to the legacy OP27 in terms of pin compatibility?
The OPA4227UAG4 is not pin-compatible with the OP27, which is a single-channel device. However, the quad-channel OPA4227UAG4 is a pin-for-pin replacement for the industry-standard quad OP27-based equivalents (e.g., LT1014, AD704) in SO-14 packages - offering substantial improvements in noise, bandwidth, and CMRR while retaining identical pin functions and layout footprint.
OPA4227UAG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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
OPA4227UAG4 FAQ
1.How can I place an order for OPA4227UAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4227UAG4 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 OPA4227UAG4 reliable?
The price and inventory of OPA4227UAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4227UAG4 is usually 5 days.
3.What payment methods are accepted for OPA4227UAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4227UAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4227UAG4?
OPA4227UAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4227UAG4 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 OPA4227UAG4?
For technical support, including OPA4227UAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4227UAG4 requirements.
6.How does Aetrix verify that OPA4227UAG4 is sourced from the original manufacturer or authorized distributors?
All OPA4227UAG4 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 OPA4227UAG4 meets industry standards.
7.What is the process for return or replacement of OPA4227UAG4?
All OPA4227UAG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4227UAG4, 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 OPA4227UAG4 part is unused and in its original packaging.
Return procedure for OPA4227UAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4227UAG4 Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
