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Texas Instruments OPA627AU/2K5E4
- Part No.:
- OPA627AU/2K5E4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA627AU/2K5E4.pdf
- Description:
- 55V/S, HIGH-SPEED, 0.8V/C DRIFT
- Quantity:
- Payment:
- Shipping:
Inventory:3,718
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Product details
Overview
OPA627AU/2K5E4 from Texas Instruments is a unity-gain stable, precision JFET-input operational amplifier optimized for high-speed, low-noise signal conditioning in demanding analog circuits. It delivers 4.5 nV/√Hz input voltage noise at 10 kHz, 150 V/μs slew rate, and 45 MHz gain-bandwidth product while operating from ±4.5 V to ±18 V supplies - enabling use in DAC output stages, ultrasound front-ends, and high-impedance sensor interfaces.
For engineers reviewing the OPA627AU/2K5E4 datasheet, OPA627AU/2K5E4 pinout, OPA627AU/2K5E4 application, or OPA627AU/2K5E4 equivalent, key selection criteria include its unity-gain stability, sub-130 ns 0.01% settling time, ±500 µV max input offset voltage over temperature, ultra-low 10 pA max input bias current, and SOIC-8 packaging with validated thermal performance (RθJA = 121.5 °C/W).
Technical Context
The OPA627AU/2K5E4 employs dielectrically isolated complementary NPN/PNP process technology with laser-trimmed input circuitry to achieve precision FET performance without bipolar trade-offs. Its cascode input stage maintains low input bias current across ±11.5 V common-mode range while delivering voltage noise density competitive with best-in-class bipolar op amps.
This device operates with full specification over –40°C to +125°C (industrial grade), supports dual-supply operation up to ±18 V, and features 10 TΩ differential input impedance. Its unity-gain stability eliminates external compensation requirements in buffer, integrator, and unity-gain filter configurations where noise gain ≤ 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 45 MHz - enables stable closed-loop operation up to 10× gain with >4.5 MHz bandwidth |
| Slew Rate | 150 V/μs - supports fast 10 V step response with minimal distortion in data acquisition paths |
| Input Voltage Noise | 4.5 nV/√Hz @ 10 kHz - critical for preserving SNR in high-gain, wideband sensor amplifiers |
| Input Bias Current | ±10 pA max - ensures negligible error in GΩ-range photodiode or piezoelectric sensor interfaces |
| Input Offset Voltage | ±500 µV max - allows direct connection to 16-bit ADCs without trimming in moderate-precision systems |
| Settling Time | 120 ns to 0.01% - meets timing budgets in 1 MSPS+ SAR ADC driver applications |
| Supply Voltage Range | ±4.5 V to ±18 V - accommodates industrial ±15 V rails and battery-powered ±5 V systems |
Pinout & Package
OPA627AU/2K5E4 is supplied in an 8-pin SOIC (D package) with exposed pad thermal enhancement. Pin 1, 5, and 8 are no-connect terminals and must remain unconnected. The device uses standard op amp topology with noninverting (+IN), inverting (–IN), output (OUT), positive supply (V+), and negative supply (V–) pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | No Connect (NC) | Internally unconnected; must be left floating - no routing or grounding required |
| 2 | Inverting Input (–IN) | High-impedance node for feedback networks; sensitive to stray capacitance - keep trace short |
| 3 | Noninverting Input (+IN) | Reference input for follower/buffer configurations; matched layout critical for CMRR |
| 4 | Negative Supply (V–) | Lowest potential rail; decouple locally with 0.1 µF ceramic + 10 µF tantalum |
| 6 | Output (OUT) | Capable of ±30 mA drive into 1 kΩ load; requires series resistor for capacitive loads > 100 pF |
| 7 | Positive Supply (V+) | Highest potential rail; same decoupling as V–; symmetric layout improves PSRR |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stability | Eliminates need for external compensation in buffers, active filters, and transimpedance amplifiers |
| Laser-trimmed input stage | Reduces system calibration burden by limiting initial offset to ±500 µV and drift to ±2.5 µV/°C |
| Ultra-low input bias current | Maintains accuracy in high-Z source applications (e.g., pH electrodes, piezo sensors) without guard rings |
| High open-loop gain (106 dB min) | Enables <0.001% gain error in 100× instrumentation amplifier topologies with matched resistors |
| Wide supply range (±4.5 V to ±18 V) | Supports legacy ±15 V industrial systems and modern low-voltage precision designs without level-shifting |
Applications
| Precision Instrumentation | DAC Output Amplification |
|---|---|
Use Scenario: High-resolution digital multimeter front-end measuring microvolt-level thermocouple signals with 100 dB CMRR requirement. IC Role / Device Role / Timing Role: Low-noise, low-drift gain stage preceding 24-bit ΣΔ ADC; operates at DC–10 kHz bandwidth. Use Value: 4.5 nV/√Hz noise and ±500 µV offset ensure <1 LSB error in 100 µV full-scale measurement at 25°C. |
Use Scenario: Driving 16-bit voltage-output DAC (e.g., DAC856x) into 10 kΩ load with monotonicity-critical settling. IC Role / Device Role / Timing Role: Unity-gain buffer with 120 ns 0.01% settling ensuring accurate code transitions at 1 MSPS update rates. Use Value: 150 V/μs slew rate and 45 MHz GBW prevent slewing-induced distortion during major code changes. |
| Ultrasound Signal Conditioning | Active Filter Design |
Use Scenario: Post-amplifier in portable ultrasound beamformer receiving echoes from 5–15 MHz transducers. IC Role / Device Role / Timing Role: Low-noise, wideband gain block with 100 dB PSRR rejecting switching supply noise in handheld units. Use Value: 10 TΩ input impedance prevents loading of high-Q resonant transducer elements; 4.5 nV/√Hz preserves dynamic range. |
Use Scenario: 4th-order Bessel low-pass filter (100 kHz cutoff) for anti-aliasing before 200 kSPS ADC in vibration monitoring. IC Role / Device Role / Timing Role: Dual-op-amp section implementing unity-gain Sallen-Key topology with precise pole placement. Use Value: Unity-gain stability and 121.5 °C/W RθJA allow reliable operation without thermal derating in compact enclosures. |
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 (±100 µV max) and drift (±0.8 µV/°C); same SOIC-8 package and pinout | Better suited for calibrated lab equipment requiring long-term zero stability over –25°C to +85°C | Select OPA627BM when offset drift dominates system error budget; OPA627AU/2K5E4 remains optimal for cost-sensitive industrial designs |
| ADA4625-1ARZ | Higher slew rate (34 V/μs), lower noise (2.9 nV/√Hz), but only stable ≥ 5 V/V gain; SOIC-8 package | Requires minimum noise gain of 5 - unsuitable for unity-gain buffers or integrators without modification | Choose ADA4625-1ARZ only for fixed-gain ≥5 signal chains where higher speed and lower noise justify redesign effort |
Compared with OPA627BM, OPA627AU/2K5E4 trades tighter offset specs for broader availability and lower unit cost; compared with ADA4625-1ARZ, it provides guaranteed unity-gain stability at the expense of slightly higher voltage noise - making it the default choice for general-purpose precision buffering and gain-of-one filtering.
Availability
OPA627AU/2K5E4 is available at Aetrix Electronics and suitable for precision instrumentation, ultrasound front-ends, and DAC output amplification requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA627AU/2K5E4 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/2K5E4 belongs to TI's OPA6x7 family of high-speed, low-noise JFET-input op amps engineered for applications demanding both precision DC performance and wide dynamic bandwidth - including medical imaging, test equipment, and high-fidelity audio.
FAQ
What is the maximum operating temperature range for the OPA627AU/2K5E4?
The OPA627AU/2K5E4 is rated for operation from –40°C to +125°C, meeting industrial temperature requirements. This range is validated per TI's SBOS165C datasheet Section 5.1 and applies to the SOIC-8 (D) package variant. Thermal derating begins above 85°C ambient, with junction temperature limited to 150°C under continuous operation.
Does the OPA627AU/2K5E4 require external offset trim?
No - the OPA627AU/2K5E4 uses laser-trimmed input circuitry and specifies ±500 µV maximum input offset voltage over temperature, eliminating routine external trimming. Offset adjustment is only supported in TO-99 packages (pins 1 and 5), not applicable to the SOIC-8 OPA627AU/2K5E4.
Can the OPA627AU/2K5E4 drive capacitive loads directly?
The OPA627AU/2K5E4 can drive up to 100 pF capacitive load stably in unity-gain configuration. For larger loads (e.g., ADC input capacitance), a series isolation resistor (20–100 Ω) between OUT and the capacitor is required to maintain phase margin and prevent peaking or oscillation.
What is the power supply rejection ratio (PSRR) of the OPA627AU/2K5E4 at 1 kHz?
At 1 kHz, the OPA627AU/2K5E4 delivers 100 dB minimum PSRR (positive rail) and 100 dB minimum PSRR (negative rail), as specified in Section 5.6 of the SBOS165C datasheet. This performance holds across ±4.5 V to ±18 V supply ranges and supports clean operation in noisy mixed-signal environments.
Is the OPA627AU/2K5E4 pin-compatible with other OPA627 variants?
Yes - all OPA627 variants (AU, BU, AM, BM, SM) share identical SOIC-8 (D) pinout and footprint. The OPA627AU/2K5E4 is mechanically and electrically interchangeable with OPA627BU and OPA627BM in the same package, though electrical specifications (offset, drift, noise) differ per grade.
OPA627AU/2K5E4 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:
- Push-Pull
- 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/2K5E4 FAQ
1.How can I place an order for OPA627AU/2K5E4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA627AU/2K5E4 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/2K5E4 reliable?
The price and inventory of OPA627AU/2K5E4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA627AU/2K5E4 is usually 5 days.
3.What payment methods are accepted for OPA627AU/2K5E4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA627AU/2K5E4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA627AU/2K5E4?
OPA627AU/2K5E4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA627AU/2K5E4 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/2K5E4?
For technical support, including OPA627AU/2K5E4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA627AU/2K5E4 requirements.
6.How does Aetrix verify that OPA627AU/2K5E4 is sourced from the original manufacturer or authorized distributors?
All OPA627AU/2K5E4 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/2K5E4 meets industry standards.
7.What is the process for return or replacement of OPA627AU/2K5E4?
All OPA627AU/2K5E4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA627AU/2K5E4, 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/2K5E4 part is unused and in its original packaging.
Return procedure for OPA627AU/2K5E4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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