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Texas Instruments OPA27GUE4
- Part No.:
- OPA27GUE4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA27GUE4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,323
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Product details
Overview
OPA27GUE4 from Texas Instruments is an ultra-low-noise, high-precision bipolar operational amplifier in SOIC-8 package, featuring 4.5 nV/√Hz max input voltage noise at 1 kHz, ±100 µV max input offset voltage, and 117 dB min open-loop gain. It is internally compensated for unity-gain stability and targets precision DC-coupled signal conditioning in instrumentation-grade analog front-ends.
For engineers reviewing the OPA27GUE4 datasheet, OPA27GUE4 pinout, OPA27GUE4 application, or OPA27GUE4 equivalent, key selection criteria include its laser-trimmed offset stability over –40°C to +85°C, low 0.4 µV/°C drift, high CMRR (100 dB min), and compatibility with OP-07/OP-05 legacy designs requiring low-noise, low-drift amplification.
Technical Context
The OPA27GUE4 uses laser-trimmed thin-film resistors to achieve microvolt-level initial offset and superior long-term voltage offset stability versus zener-zap methods. Its unique bias current cancellation circuit ensures specified input bias and offset currents across the full industrial temperature range.
As an internally compensated op amp, it delivers unity-gain stable operation without external compensation components. It is a direct functional upgrade to industry-standard OP-27, offering improved noise, offset, and drift performance while maintaining pinout compatibility with legacy DIP-8 and SOIC-8 footprints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 4.5 nV/√Hz max at 1 kHz - enables high-resolution measurement of low-level sensor signals without dominating system noise floor. |
| Input Offset Voltage | ±100 µV max - supports accurate DC amplification in strain gauge, thermocouple, and bridge sensor interfaces. |
| Offset Voltage Drift | ±0.4 µV/°C max - ensures minimal calibration drift over temperature in portable or unheated test equipment. |
| Open-Loop Gain | 117 dB min - provides >500,000 V/V loop gain for precise closed-loop gain accuracy in 16-bit+ data acquisition systems. |
| CMRR | 100 dB min - rejects common-mode interference in differential transducer amplifiers operating near noisy power rails. |
| PSRR | 94 dB min - maintains output accuracy despite ±4 V to ±22 V supply variations, critical in mixed-signal PCBs with shared rails. |
| Gain-Bandwidth Product | 5 MHz min - supports stable unity-gain buffering and low-noise amplification up to ~100 kHz with adequate phase margin. |
Pinout & Package
OPA27GUE4 is housed in an 8-pin SOIC (SO-8) package with 1.27 mm pitch, 3.9 mm width, and 1.75 mm max height per JEDEC MS-012 variation AA. Pin 1 is marked by a beveled corner or dot; device orientation follows standard SOIC top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Trim (–) | Connects to wiper of 10 kΩ trim potentiometer for fine offset adjustment; unused pins must remain open or tied to Pin 8. |
| 2 | Inverting Input (–In) | Differential input node; high-impedance, protected by back-to-back diodes; requires current limiting if differential voltage exceeds ±0.7 V. |
| 3 | Non-Inverting Input (+In) | Differential input node; same protection and layout sensitivity as Pin 2; critical for thermoelectric error minimization. |
| 4 | –VCC | Negative supply rail connection; decoupling capacitor (0.1 µF ceramic) required within 1 cm for stable low-noise operation. |
| 5 | Offset Trim (+) | Connects to one end of trim potentiometer; laser trimming eliminates need for nulling in most applications. |
| 6 | Output | Class-A output stage capable of ±12 V swing into 2 kΩ; short-circuit current limited to 25–60 mA. |
| 7 | +VCC | Positive supply rail connection; symmetric ±15 V nominal operation; supports ±4 V to ±22 V range with derated specs. |
| 8 | No Connection (NC) | Internally unconnected; must remain floating-no tie to ground, supply, or other nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enables ±100 µV max offset and ±0.4 µV/°C drift without external nulling, reducing calibration overhead in production test. |
| Bias current cancellation circuit | Maintains ±15 nA max input bias current over –40°C to +85°C, enabling stable operation with high-impedance pH or photodiode sensors. |
| Back-to-back input diode protection | Allows robust handling of transient overvoltage without series current-limiting resistors-preserving low-noise performance. |
| Unity-gain stable internal compensation | Eliminates need for external compensation capacitors in follower, integrator, or gain-of-1 configurations-reducing BOM count. |
| SOIC-8 RoHS-compliant packaging | Supports automated SMT assembly with Level-3 MSL rating (260°C peak reflow), compatible with standard 0.65 mm pitch pick-and-place. |
Applications
| High-Precision Data Acquisition | Professional Audio Preamplification |
|---|---|
|
Use Scenario: Amplifying low-level outputs from 24-bit delta-sigma ADC reference buffers and load cell bridges in industrial weigh scales. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with <1 µVpp 0.1 Hz–10 Hz noise, rejecting power supply ripple and thermal EMFs. Use Value: Enables 1:1,000,000 dynamic range without chopper stabilization-reducing design complexity vs. auto-zero alternatives. |
Use Scenario: Low-noise microphone preamplifier in broadcast mixing consoles requiring <–125 dBu EIN and minimal harmonic distortion. IC Role / Device Role / Timing Role: First-stage gain block with 4.5 nV/√Hz noise density and 117 dB open-loop gain for accurate signal fidelity. Use Value: Delivers professional-grade audio SNR without FET-based trade-offs in input impedance or bias current stability. |
| Transducer Signal Conditioning | Radiation-Hardened Instrumentation |
|
Use Scenario: Amplifying millivolt-level outputs from RTDs, thermocouples, and piezoresistive pressure sensors in medical diagnostics equipment. IC Role / Device Role / Timing Role: Low-drift, low-noise instrumentation amplifier front-end with laser-trimmed offset for factory calibration retention. Use Value: Maintains ±0.1°C temperature measurement accuracy over 10-year field life without recalibration. |
Use Scenario: Signal conditioning in space-qualified telemetry systems exposed to total ionizing dose (TID) environments. IC Role / Device Role / Timing Role: Radiation-tolerant analog front-end leveraging bipolar process inherent immunity to single-event latchup (SEL). Use Value: Supports mission-critical operation where CMOS op amps would require shielding or redundancy-reducing SWaP-C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA27GP | DIP-8 package, 100°C/W θJA, no MSL rating; identical electrical specs but through-hole mounting. | Suitable for prototyping, lab test fixtures, or legacy board upgrades where SOIC footprint is unavailable. | Select OPA27GP when manual soldering, breadboarding, or socket-based validation is required. |
| OPA227UA | Enhanced version with ±25 µV max offset, 0.1 µV/°C drift, and 120 dB min CMRR; same SOIC-8 package. | Targets higher-tier metrology and calibration equipment where sub-µV drift is mandatory. | Choose OPA227UA only if tighter offset/drift specs justify cost premium; OPA27GUE4 remains optimal for cost-sensitive industrial DAQ. |
Compared with OPA27GP, OPA27GUE4 offers surface-mount reliability and thermal performance for volume production, while OPA227UA trades higher cost for measurable improvements in long-term stability-making OPA27GUE4 the balanced choice for industrial instrumentation with strict noise and drift requirements.
Availability
OPA27GUE4 is available at Aetrix Electronics and suitable for precision instrumentation, data acquisition, and professional audio equipment requiring stable component supply, consistent parametric performance, and long-term obsolescence management.
Supply support for OPA27GUE4 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 innovation.
The OPA27 product line was engineered specifically for high-accuracy, low-noise analog signal chains in test & measurement, medical, and industrial control systems-prioritizing offset stability, noise floor, and temperature resilience over speed or power efficiency.
FAQ
What is the maximum supply voltage for OPA27GUE4?
The absolute maximum supply voltage for OPA27GUE4 is ±22 V. Operation at ±15 V is recommended for full specification compliance; derated performance applies between ±4 V and ±22 V. Exceeding ±22 V risks permanent damage to the internal bipolar junctions and input protection diodes.
Does OPA27GUE4 require external compensation for unity-gain operation?
No, OPA27GUE4 is internally compensated and stable at unity gain. However, when using feedback resistors >2 kΩ, a small capacitor (typically 1–5 pF) in parallel with RF may be needed to suppress peaking caused by RF–CIN interaction-especially in high-source-impedance sensor interfaces.
Can OPA27GUE4 replace OP-07 in existing designs?
Yes, OPA27GUE4 is explicitly designed as an improved replacement for OP-07, OP-05, AD510, and AD517. It matches the SOIC-8 pinout, offers lower noise (4.5 nV/√Hz vs. 12 nV/√Hz), lower drift (0.4 µV/°C vs. 1.2 µV/°C), and higher open-loop gain-requiring no schematic or layout changes.
What is the purpose of Pins 1 and 5 on OPA27GUE4?
Pins 1 and 5 are offset trim terminals. A 10 kΩ potentiometer connected between them-with its wiper to Pin 1-allows fine adjustment of input offset voltage. Laser trimming makes nulling unnecessary in most applications; unused trim pins must remain open to avoid degrading drift performance.
Is OPA27GUE4 suitable for radiation-hardened applications?
While not formally certified as radiation-hardened, OPA27GUE4's bipolar process exhibits inherent tolerance to total ionizing dose (TID) and single-event effects. It is documented in TI's SBOS135C datasheet for use in radiation-hard equipment-leveraging its robust junction isolation and absence of gate oxide vulnerability found in CMOS op amps.
OPA27GUE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1.9V/µs
- Gain Bandwidth Product:
- 8 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 nA
- Voltage - Input Offset:
- 25 µV
- Current - Supply:
- 3.3mA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA27GUE4 FAQ
1.How can I place an order for OPA27GUE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA27GUE4 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 OPA27GUE4 reliable?
The price and inventory of OPA27GUE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA27GUE4 is usually 5 days.
3.What payment methods are accepted for OPA27GUE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA27GUE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA27GUE4?
OPA27GUE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA27GUE4 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 OPA27GUE4?
For technical support, including OPA27GUE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA27GUE4 requirements.
6.How does Aetrix verify that OPA27GUE4 is sourced from the original manufacturer or authorized distributors?
All OPA27GUE4 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 OPA27GUE4 meets industry standards.
7.What is the process for return or replacement of OPA27GUE4?
All OPA27GUE4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA27GUE4, 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 OPA27GUE4 part is unused and in its original packaging.
Return procedure for OPA27GUE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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