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Texas Instruments OPA627AU/2K5
- Part No.:
- OPA627AU/2K5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA627AU/2K5.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:573
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Product details
Overview
OPA627AU/2K5 from Texas Instruments is a precision JFET-input operational amplifier optimized for high-speed, low-noise signal conditioning in demanding analog systems. It delivers 4.5nV/√Hz input voltage noise at 10kHz, 150V/μs slew rate, and 45MHz gain-bandwidth product while remaining unity-gain stable - enabling use in DAC output buffers, ultrasound front-ends, and active filter stages requiring both accuracy and bandwidth.
For engineers reviewing the OPA627AU/2K5 datasheet, OPA627AU/2K5 pinout, OPA627AU/2K5 application, or OPA627AU/2K5 equivalent, key selection criteria include its ±15V dual-supply operation, 120ns settling time to 0.01%, laser-trimmed offset (±280μV max), ultra-low 5pA input bias current, and SOIC-8 packaging suitable for space-constrained precision PCB layouts.
Technical Context
The OPA627AU/2K5 employs a dielectrically isolated complementary NPN/PNP process with cascode input circuitry to maintain sub-10pA input bias current across ±11.5V common-mode range while achieving bipolar-class voltage noise. Its unity-gain stability stems from internal compensation tailored for wide supply range (±4.5V to ±18V) and robust phase margin (>75°) up to 10MHz.
Unlike the higher-bandwidth OPA637 (stable only at gain ≥5), the OPA627AU/2K5 supports direct use in unity-gain buffers, integrators, and transimpedance amplifiers without external compensation - making it the preferred choice for low-noise sensor interfaces where noise gain cannot be guaranteed above 5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 4.5nV/√Hz at 10kHz - enables high-resolution measurement of low-level signals without dominant op-amp contribution |
| Settling Time | 120ns to 0.01% - supports fast data acquisition at >1MSps with minimal settling error |
| Gain-Bandwidth Product | 45MHz - sustains closed-loop bandwidth >10MHz even at moderate gains (e.g., 4×) |
| Input Bias Current | ±2pA max (25°C) - preserves signal integrity in high-impedance sensor nodes (e.g., piezoelectric, pH electrodes) |
| Offset Voltage | ±500μV max - allows DC-coupled precision amplification without mandatory external trimming |
| Slew Rate | 150V/μs - prevents distortion on fast-rising waveforms such as pulsed ultrasound or laser driver feedback |
| Supply Range | ±4.5V to ±18V - accommodates industrial ±15V rails and battery-powered ±5V systems |
Pinout & Package
OPA627AU/2K5 is packaged in an 8-pin SOIC (D package), surface-mountable with standard reflow profiles. Thermal resistance RθJA is 121.5°C/W, requiring modest copper pour for continuous 7.5mA quiescent operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | NC | No internal connection - must remain unconnected; floating or grounded per layout best practice |
| 2 | –IN | Inverting input - primary feedback node; sensitive to stray capacitance; requires guard trace in high-Z designs |
| 3 | +IN | Noninverting input - high-impedance JFET node; benefits from symmetric layout and low-impedance source |
| 4 | V– | Negative power supply - return path for bias current and output sink; separate ground plane recommended |
| 6 | OUT | Amplified output - capable of ±30mA drive into 1kΩ; may require series resistor for capacitive loads >100pF |
| 7 | V+ | Positive power supply - supplies output source current; decoupling capacitor (0.1μF + 10μF) required at pin |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stability | Eliminates need for external compensation in buffer, integrator, or transimpedance configurations |
| Laser-trimmed input stage | Reduces system calibration burden by limiting initial offset to ±500μV and drift to ±2.5μV/°C |
| Ultra-low input bias current | Maintains signal fidelity in >1GΩ source impedances without significant DC error or thermal drift |
| High PSRR & CMRR | 116dB PSRR and 110dB CMRR minimize interference from noisy power rails or common-mode pickup |
| Wide supply range | Operates from ±4.5V to ±18V - supports legacy ±15V instrumentation and modern low-voltage portable designs |
Applications
| Precision Instrumentation | Fast Data Acquisition |
|---|---|
Use Scenario: High-accuracy strain gauge bridge amplifier in automated test equipment with 24-bit ADC backend. IC Role / Device Role / Timing Role: Primary signal-conditioning amplifier providing gain, offset correction, and low-pass filtering before digitization. Use Value: 4.5nV/√Hz noise and ±500μV offset enable <10ppm measurement linearity over 0–10V full scale without recalibration. | Use Scenario: Front-end amplifier for 1MSps sampling oscilloscope channel with 0.01% settling requirement. IC Role / Device Role / Timing Role: Driver for multiplexer-to-ADC signal path, handling transient step responses with minimal overshoot. Use Value: 120ns settling to 0.01% ensures accurate capture of 100ns-wide pulses without aperture uncertainty penalty. |
| DAC Output Amplifier | High-Impedance Sensor Amp |
Use Scenario: Buffered voltage output stage for 16-bit current-steering DAC in programmable power supply control loop. IC Role / Device Role / Timing Role: Unity-gain buffer isolating DAC from load variations while maintaining monotonicity and glitch energy suppression. Use Value: Unity-gain stability and 150V/μs slew rate prevent slewing-induced nonlinearity during fast DAC code transitions. | Use Scenario: Charge amplifier for piezoelectric accelerometer in structural health monitoring system. IC Role / Device Role / Timing Role: Transimpedance amplifier converting high-impedance charge output to low-impedance voltage with minimal leakage error. Use Value: 2pA input bias current avoids >100mV baseline shift over 10-second integration window at 1GΩ feedback impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision JFET op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA627BM | Lower offset (±100μV max) and drift (±0.8μV/°C); same SOIC-8 package and unity-gain stability | Better suited for extended temperature range (–25°C to +85°C) and zero-calibration-sensitive metrology | Select OPA627BM when tighter DC specs are required and cost premium is acceptable |
| OPA140AIDR | Lower noise (1.8nV/√Hz), lower IQ (1.5mA), but lower GBW (11MHz); SOIC-8, unity-gain stable | Ideal for low-power, battery-operated precision instruments where speed <5MHz suffices | Choose OPA140AIDR for ultra-low-power, low-noise applications with relaxed bandwidth needs |
Compared with OPA627BM and OPA140AIDR, the OPA627AU/2K5 offers the optimal balance of speed (45MHz GBW), noise (4.5nV/√Hz), and cost for industrial-grade high-speed precision amplification - retaining full compatibility with existing SOIC-8 footprints while delivering superior dynamic performance than lower-power alternatives.
Availability
OPA627AU/2K5 is available at Aetrix Electronics and suitable for precision instrumentation, fast data acquisition, and DAC output buffering requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for OPA627AU/2K5 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 OPA627AU/2K5 belongs to TI's OPA6x7 family of high-speed JFET-input op amps, engineered specifically for applications demanding simultaneous low noise, low drift, high slew rate, and unity-gain stability - targeting test & measurement, medical imaging, and high-fidelity audio signal chains.
FAQ
What is the maximum operating temperature range for the OPA627AU/2K5?
The OPA627AU/2K5 is rated for operation from –40°C to +125°C ambient temperature, meeting industrial-grade reliability requirements. Its electrical specifications - including offset voltage, bias current, and gain-bandwidth - are guaranteed over the –25°C to +85°C range, with derated performance outside that window. Thermal design must account for its 121.5°C/W junction-to-ambient resistance in SOIC-8 packaging.
Does the OPA627AU/2K5 require external offset trim in typical applications?
No, the OPA627AU/2K5 does not require external offset trim in most applications due to laser-trimmed input circuitry delivering ±500μV maximum input offset voltage and ±2.5μV/°C drift. External trimming is only necessary in ultra-high-precision systems demanding sub-100μV residual offset - and then only using the TO-99 variant; the SOIC-8 OPA627AU/2K5 lacks offset trim pins.
Can the OPA627AU/2K5 drive capacitive loads directly?
The OPA627AU/2K5 can drive moderate capacitive loads (<100pF) directly, but larger loads risk instability or ringing due to phase margin reduction. For loads >100pF - such as ADC input capacitors or long cables - a series isolation resistor (10–50Ω) between OPA627AU/2K5 output and the load is recommended to restore stability without significantly degrading bandwidth.
How does the OPA627AU/2K5 compare to the OPA637 in terms of stability and bandwidth?
The OPA627AU/2K5 is unity-gain stable with 45MHz GBW, while the OPA637 is stable only at noise gain ≥5 and achieves 80MHz GBW. This makes OPA627AU/2K5 suitable for buffers and integrators, whereas OPA637 excels in fixed-gain ≥5 signal paths like non-inverting amplifiers. Using OPA637 in unity-gain violates stability specs and risks oscillation.
Is the OPA627AU/2K5 pin-compatible with other OPA6x7 variants?
Yes, the OPA627AU/2K5 shares identical SOIC-8 pinout and footprint with all OPA627 variants (e.g., OPA627BM, OPA627SM) and OPA637 variants in D-package. This allows drop-in replacement within the same gain-stability class - though substituting OPA637 for OPA627AU/2K5 requires circuit redesign to ensure minimum noise gain ≥5.
OPA627AU/2K5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Difet®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 55V/µs
- Gain Bandwidth Product:
- 16 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 pA
- Voltage - Input Offset:
- 130 µV
- Current - Supply:
- 7mA
- Current - Output / Channel:
- 45 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -25°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA627AU/2K5 FAQ
1.How can I place an order for OPA627AU/2K5 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA627AU/2K5 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 OPA627AU/2K5 reliable?
The price and inventory of OPA627AU/2K5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA627AU/2K5 is usually 5 days.
3.What payment methods are accepted for OPA627AU/2K5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA627AU/2K5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA627AU/2K5?
OPA627AU/2K5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA627AU/2K5 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 OPA627AU/2K5?
For technical support, including OPA627AU/2K5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA627AU/2K5 requirements.
6.How does Aetrix verify that OPA627AU/2K5 is sourced from the original manufacturer or authorized distributors?
All OPA627AU/2K5 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 OPA627AU/2K5 meets industry standards.
7.What is the process for return or replacement of OPA627AU/2K5?
All OPA627AU/2K5 units undergo pre-shipment inspection (PSI). If there is an issue with OPA627AU/2K5, 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 OPA627AU/2K5 part is unused and in its original packaging.
Return procedure for OPA627AU/2K5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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