My Inquiry
My Account
Texas Instruments OPA4227PAG4
- Part No.:
- OPA4227PAG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
OPA4227PAG4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,529
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA4227PAG4 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 at 1 kHz, 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, geophysical sensor front-ends, and spectral analysis instrumentation.
For engineers reviewing the OPA4227PAG4 datasheet, OPA4227PAG4 pinout, OPA4227PAG4 application, or OPA4227PAG4 equivalent, key selection considerations include its unity-gain stability, rail-to-rail output swing capability (±2 V from rails), low 10 nA max input bias current, and compatibility with ±2.5 V to ±18 V dual supplies in space-constrained quad-channel designs.
Technical Context
The OPA4227PAG4 implements a bipolar input stage with matched transistor pairs to achieve low offset voltage drift (±0.6 µV/°C max) and high open-loop gain (160 dB typ). Its internal compensation ensures unity-gain stability without external components, supporting wideband signal conditioning in both inverting and non-inverting configurations.
It features fully independent amplifier channels with >110 dB channel separation at DC and maintains CMRR of 138 dB over common-mode input range (V– +2 V to V+ –2 V), making it suitable for multi-channel differential measurement systems where crosstalk must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 3 nV/√Hz at 1 kHz - enables high-fidelity amplification of microvolt-level sensor signals without adding significant noise floor |
| Gain Bandwidth Product | 8 MHz - supports stable closed-loop operation up to 100 kHz with G = 100, suitable for anti-aliasing and active filter stages |
| Slew Rate | 2.3 V/µs - allows full-scale 10 V output transitions within 4.3 µs, meeting settling requirements for 16-bit DAC buffers |
| Input Offset Voltage | ±75 µV max at 25°C - ensures ≤0.0015% gain error in 5 V full-scale precision instrumentation amplifiers |
| Common-Mode Rejection | 138 dB - rejects >20 million:1 common-mode interference, critical for bridge sensor interfaces with noisy ground returns |
| Supply Voltage Range | ±2.5 V to ±18 V - permits direct integration into legacy ±15 V industrial control systems or low-voltage portable data loggers |
Pinout & Package
OPA4227PAG4 is housed in a 14-pin plastic DIP (PDIP-14) package measuring 19.30 mm × 6.35 mm, with through-hole mounting and industry-standard pinout compatible with OPA4228 and legacy OP-27 quad variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Out A) | Output channel A | Amplified signal output for first op amp; capable of ±2 V swing into 10 kΩ load |
| 2 (–In A) | Inverting input channel A | Differential input node; high-impedance (10⁷ Ω || 12 pF) with 10 nA max bias current |
| 3 (+In A) | Noninverting input channel A | Differential input node; matched impedance and bias to pin 2 for optimal CMRR |
| 4 (V+) | Positive supply rail | Connects to highest potential supply; supports up to +18 V relative to V– |
| 5 (+In B) | Noninverting input channel B | Second amplifier's noninverting input; electrically isolated from other channels |
| 6 (–In B) | Inverting input channel B | Second amplifier's inverting input; shares no internal connection with pins 2 or 9 |
| 7 (Out B) | Output channel B | Independent output; 27 Ω open-loop output impedance at 1 MHz |
| 8 (Out C) | Output channel C | Third amplifier output; identical AC/DC specs to Out A and Out B |
| 9 (–In C) | Inverting input channel C | Third amplifier's inverting input; referenced only to its own output and supply rails |
| 10 (+In C) | Noninverting input channel C | Third amplifier's noninverting input; thermally balanced layout recommended vs pin 9 |
| 11 (V–) | Negative supply rail | Connects to lowest potential supply; supports down to –18 V relative to V+ |
| 12 (+In D) | Noninverting input channel D | Fourth amplifier's noninverting input; no internal trimming or feedback path to other channels |
| 13 (–In D) | Inverting input channel D | Fourth amplifier's inverting input; fully isolated per-channel architecture |
| 14 (Out D) | Output channel D | Final amplifier output; maintains 5 µs 0.1% settling time with 100 pF capacitive load |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable architecture | Eliminates need for external compensation components in G = 1 buffer or integrator circuits |
| Low 10 nA max input bias current | Reduces voltage error across high-impedance source networks (e.g., piezoelectric sensors, pH electrodes) |
| 138 dB CMRR at DC | Enables accurate differential measurements in presence of shared ground noise up to 100 mVpp |
| ±75 µV max input offset voltage | Permits DC-coupled signal chains without manual nulling in 16-bit data acquisition systems |
| 8 MHz bandwidth with 2.3 V/µs slew rate | Supports simultaneous high-resolution and high-speed performance in oscilloscope front-ends and active filters |
Applications
| Professional Audio Preamp | Geophysical Signal Conditioning |
|---|---|
Use Scenario: Low-noise microphone preamplification in studio-grade audio interfaces requiring <0.0001% THD+N. IC Role / Device Role / Timing Role: Primary gain stage amplifying 1–10 mV mic signals with minimal added noise before ADC conversion. Use Value: 3 nV/√Hz input voltage noise preserves dynamic range; 138 dB CMRR rejects power supply hum induced in long XLR cables. | Use Scenario: Amplifying seismic transducer outputs (sub-µV level) in field-deployable vibration analyzers. IC Role / Device Role / Timing Role: First-stage low-noise amplifier in multi-channel analog front-end before programmable gain and filtering. Use Value: 10 nA max input bias current prevents signal loss across high-Z geophone elements; quad configuration reduces board area by 50% vs discrete singles. |
| Spectral Analysis Instrumentation | Data Acquisition System Front-End |
Use Scenario: High-fidelity signal conditioning for FFT-based spectrum analyzers used in EMI testing. IC Role / Device Role / Timing Role: Anti-aliasing filter driver and signal buffer prior to 1 MSPS SAR ADC sampling. Use Value: 8 MHz GBW ensures flat frequency response to 100 kHz; 5 µs 0.1% settling guarantees accurate sample capture at 100 kSPS. | Use Scenario: Multi-channel precision sensor interface in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Quad-channel instrumentation amplifier front-end for RTD, thermocouple, and strain gauge inputs. Use Value: ±75 µV max offset voltage eliminates per-channel calibration; 110 dB channel separation prevents cross-talk between 4 independent measurement paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4228PAG4 | Higher 33 MHz GBW and 10 V/µs slew rate, but requires minimum G = 5 for stability | Better suited for high-gain, high-frequency active filters; not unity-gain stable | Select OPA4228PAG4 only when closed-loop gain ≥5 and bandwidth >10 MHz is required |
| AD8628ARUZ | Zero-drift architecture with 0.5 µV max offset and 0.005 µV/°C drift, but 2.5 MHz GBW and higher 12 nA bias current | Superior DC accuracy for ultra-low-drift applications; lower bandwidth limits AC performance | Choose AD8628ARUZ when sub-µV offset stability over temperature outweighs need for 8 MHz bandwidth |
Compared with OPA4228PAG4, OPA4227PAG4 provides guaranteed unity-gain stability and lower noise floor, while AD8628ARUZ trades bandwidth for near-zero drift - making OPA4227PAG4 the optimal balance of precision, speed, and ease of use in general-purpose high-fidelity analog signal chains.
Availability
OPA4227PAG4 is available at Aetrix Electronics and suitable for professional audio equipment, geophysical analysis instruments, and spectral analysis systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for OPA4227PAG4 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 specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The OPAx22x product line was designed specifically for high-fidelity signal conditioning in test and measurement, audio, and scientific instrumentation - emphasizing low noise, low drift, and robust DC precision without sacrificing bandwidth.
FAQ
What is the maximum operating supply voltage for OPA4227PAG4?
The OPA4227PAG4 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 the –40°C to 85°C temperature range, and the device remains functional up to ±20 V with derated performance. Always observe absolute maximum ratings to prevent permanent damage.
Does OPA4227PAG4 require external compensation for unity-gain operation?
No, OPA4227PAG4 is internally compensated for unity-gain stability. It can be used directly in G = 1 buffer, inverter, or integrator configurations without external capacitors or resistors. This simplifies design and improves reliability compared to decompensated op-amps like OPA4228PAG4, which require minimum gain of 5.
What is the typical input voltage noise density of OPA4227PAG4 at 10 Hz?
The typical input voltage noise density of OPA4227PAG4 at 10 Hz is 3.5 nV/√Hz, as confirmed in the Electrical Characteristics table (Section 6.6) of the SBOS110B datasheet. This value is consistent across all four amplifier channels and remains stable over the full specified temperature range.
Can OPA4227PAG4 drive capacitive loads without oscillation?
OPA4227PAG4 can safely drive up to 100 pF capacitive loads in unity-gain configuration with minimal overshoot, as verified in Figure 26 of the datasheet. For loads exceeding 100 pF, an isolation resistor (typically 20–100 Ω) placed in series with the output is recommended to maintain phase margin and prevent instability.
Is OPA4227PAG4 pin-compatible with legacy OP-27 quad variants?
Yes, OPA4227PAG4 is a pin-for-pin replacement for the industry-standard OP-427 quad op-amp in PDIP-14 and SOIC-14 packages. The pin functions, supply connections, and output/input assignments match exactly, allowing drop-in upgrades with substantial improvements in noise, bandwidth, and offset voltage performance.
OPA4227PAG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 14-PDIP
OPA4227PAG4 FAQ
1.How can I place an order for OPA4227PAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4227PAG4 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 OPA4227PAG4 reliable?
The price and inventory of OPA4227PAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4227PAG4 is usually 5 days.
3.What payment methods are accepted for OPA4227PAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4227PAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4227PAG4?
OPA4227PAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4227PAG4 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 OPA4227PAG4?
For technical support, including OPA4227PAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4227PAG4 requirements.
6.How does Aetrix verify that OPA4227PAG4 is sourced from the original manufacturer or authorized distributors?
All OPA4227PAG4 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 OPA4227PAG4 meets industry standards.
7.What is the process for return or replacement of OPA4227PAG4?
All OPA4227PAG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4227PAG4, 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 OPA4227PAG4 part is unused and in its original packaging.
Return procedure for OPA4227PAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4227PAG4 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…
