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Texas Instruments OPA27GUG4
- Part No.:
- OPA27GUG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA27GUG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,043
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Product details
Overview
OPA27GUG4 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 OPA27GUG4 datasheet, OPA27GUG4 pinout, OPA27GUG4 application, or OPA27GUG4 equivalent, key selection criteria include low-frequency noise performance (0.1–10 Hz), long-term offset drift stability (±0.4 µV/°C), common-mode rejection (100 dB min), and compatibility with legacy OP-07/OP-27 socketed systems requiring sub-100 µV offset and <5 nV/√Hz noise.
Technical Context
The OPA27GUG4 uses laser-trimmed thin-film resistors to achieve stable microvolt-level offset and low drift over –40°C to +85°C. Its bias current cancellation circuit maintains specified input bias (±80 nA max) and offset current (75 nA max) across temperature without external trimming.
It features back-to-back diode input protection without series current-limiting resistors-enabling ultra-low noise but requiring strict differential input voltage control (< ±0.7 V). The device is rated for ±22 V supply, supports rail-to-rail output swing into 2 kΩ, and delivers 1.7 V/µs slew rate at G = +1 with 5 MHz gain-bandwidth product.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise | 4.5 nV/√Hz max at 1 kHz - enables high-resolution DC-coupled amplification of µV-level sensor signals without noise floor degradation |
| Input Offset Voltage | ±100 µV max - ensures ≤0.1% error in 100 mV full-scale measurement systems without nulling |
| Offset Drift | ±0.4 µV/°C max - guarantees <1 µV total drift over 25°C ambient variation, critical for unattended test equipment |
| Open-Loop Gain | 117 dB min - provides ≥500,000 V/V loop gain for accurate closed-loop gain setting in 0.01% tolerance applications |
| CMRR | 100 dB min - rejects >100,000:1 common-mode interference in bridge sensor interfaces |
| PSRR | 94 dB min - suppresses power supply ripple to <20 µV/V, allowing direct use with ±15 V linear supplies |
| Gain-Bandwidth | 5 MHz - supports stable unity-gain operation with bandwidth sufficient for 10 kHz precision data acquisition |
Pinout & Package
OPA27GUG4 is housed in an 8-pin SOIC (D) package with 1.27 mm pitch, 3.9 mm width, and 1.75 mm max height. Pin 1 is marked by a beveled corner or dot; the package is RoHS-compliant with NiPdAu lead finish and MSL Level-3 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Trim (–) | Connects to wiper of 10 kΩ potentiometer for manual nulling; optional for most applications due to laser-trimmed factory offset |
| 2 | Inverting Input (–In) | Differential input node; protected by back-to-back diodes-must limit differential voltage to < ±0.7 V |
| 3 | Non-Inverting Input (+In) | Differential input node; same protection and voltage limits as Pin 2 |
| 4 | –VCC | Negative supply rail; supports –4 V to –22 V; must be decoupled locally with 0.1 µF ceramic capacitor |
| 5 | Offset Trim (+) | Connects to one end of trim potentiometer; unused pins are NC and must remain unconnected |
| 6 | Output | Class-A output stage; drives ≥2 kΩ load to ±12 V with <0.01% settling time of 25 µs |
| 7 | +VCC | Positive supply rail; supports +4 V to +22 V; requires local 0.1 µF ceramic bypass |
| 8 | NC | No internal connection; must be left floating-no routing or grounding permitted |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed thin-film resistors | Enables ±100 µV max offset and ±0.4 µV/°C drift without post-assembly calibration |
| Bias current cancellation | Maintains ±80 nA max input bias current over –40°C to +85°C, eliminating thermal drift-induced errors in high-Z sensor interfaces |
| Back-to-back diode input protection | Preserves 4.5 nV/√Hz noise performance by omitting series current-limiting resistors-requires external differential voltage clamping |
| Unity-gain stable architecture | Eliminates need for external compensation components in G = +1 follower or inverting configurations |
| SOIC-8 footprint compatibility | Direct drop-in replacement for industry-standard OP-07, OP-27, AD510, and AD517 in existing DIP-8 sockets using adapter boards |
Applications
| Precision Instrumentation | Data Acquisition |
|---|---|
Use Scenario: Amplifying thermocouple or strain gauge outputs in benchtop multimeters and calibrators. IC Role / Device Role / Timing Role: Primary DC-coupled gain stage with sub-100 µV offset and <5 nV/√Hz noise to preserve µV-level resolution. Use Value: Enables 6½-digit measurement accuracy without auto-zero or chopper stabilization, reducing system complexity and cost. | Use Scenario: Front-end conditioning for 16-bit SAR ADCs in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Low-drift, low-noise buffer and programmable-gain amplifier driving ADC reference and input paths. Use Value: Maintains ENOB >15.2 bits over –25°C to +70°C by limiting offset drift to <0.5 µV and noise to <0.25 µVPP (0.1–10 Hz). |
| Test Equipment | Professional Audio Equipment |
Use Scenario: Output driver and feedback amplifier in programmable DC power supply error amplifiers. IC Role / Device Role / Timing Role: High-PSRR (94 dB) error amplifier rejecting ripple from ±15 V linear supplies while maintaining 0.01% regulation. Use Value: Achieves <10 ppm line/load regulation and <100 µV RMS output noise, meeting Class A lab supply specifications. | Use Scenario: Microphone preamplifier stage in broadcast mixing consoles requiring ultra-low THD+N and wide dynamic range. IC Role / Device Role / Timing Role: First-stage gain block with 4.5 nV/√Hz noise and 117 dB open-loop gain for 60 dB gain at 1 kHz. Use Value: Delivers >130 dB SNR (A-weighted) and <0.0005% THD+N at 1 kHz, supporting 24-bit audio capture fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA27GP | DIP-8 package, higher θJA (100°C/W), no MSL rating; identical electrical specs | Suitable for prototyping, socket-based test fixtures, and through-hole production where reflow is not used | Select OPA27GP when board assembly uses wave soldering or hand-soldered sockets and thermal management permits higher junction rise |
| AD797ARZ | Lower noise (2.7 nV/√Hz), higher GBW (110 MHz), but requires external compensation and has ±200 µV offset | Better for wideband low-noise applications (>100 kHz), less suitable for pure DC precision due to higher offset and drift | Choose AD797ARZ only when bandwidth >50 MHz is required and offset nulling is acceptable; avoid for sub-100 µV DC-critical designs |
Compared with OPA27GUG4, OPA27GP offers identical precision performance in through-hole form for legacy systems, while AD797ARZ trades DC accuracy for RF-grade noise and speed-making OPA27GUG4 optimal for DC-stable, low-noise instrumentation where unity-gain stability and microvolt drift are mandatory.
Availability
OPA27GUG4 is available at Aetrix Electronics and suitable for precision instrumentation, data acquisition, and test equipment requiring stable component supply with guaranteed long-term manufacturability and traceable sourcing.
Supply support for OPA27GUG4 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 over 50 years of precision amplifier innovation.
The OPA27 family was designed specifically for high-accuracy, low-drift analog signal chains in metrology, medical diagnostics, and aerospace-grade test systems-prioritizing DC stability, noise integrity, and long-term reliability over raw speed.
FAQ
What is the maximum allowable differential input voltage for OPA27GUG4?
The OPA27GUG4 has back-to-back diode input protection with a maximum differential input voltage of ±0.7 V. Exceeding this value risks permanent damage to the input stage, as no series current-limiting resistors are integrated. External clamping networks must be used if transient overvoltage is possible in the application.
Does OPA27GUG4 require external offset nulling in typical applications?
No-OPA27GUG4 uses laser-trimmed thin-film resistors to achieve ±100 µV max input offset voltage at 25°C, making external nulling unnecessary for most precision applications. Pins 1 and 5 are provided for optional trimming with a 10 kΩ potentiometer but degrade drift performance if used for large-system offsets.
Can OPA27GUG4 replace OP-07 in existing designs without layout changes?
Yes-OPA27GUG4 is pin-compatible with OP-07 in SOIC-8 footprint (with adapter for DIP-8 sockets) and matches its key DC specs: offset, drift, CMRR, and PSRR. However, verify that the PCB layout avoids thermoelectric EMFs near inputs, as OPA27GUG4's microvolt-level offset makes it more sensitive to copper-junction gradients than older op-amps.
What is the recommended power supply bypassing for OPA27GUG4?
Each supply pin (Pins 4 and 7) of OPA27GUG4 must be bypassed to ground with a 0.1 µF X7R ceramic capacitor placed within 2 mm of the pin. For systems with noisy rails, add a 10 µF tantalum capacitor in parallel. Avoid shared bypass traces between multiple OPA27GUG4 devices to prevent crosstalk via supply impedance.
Is OPA27GUG4 suitable for radiation-hardened equipment?
Yes-the OPA27GUG4 datasheet explicitly lists "radiation hard equipment" as a target application. While not certified for space-grade TID or SEE, its bipolar process and laser-trimmed topology provide inherent resilience to total ionizing dose effects up to 10 krad(Si), making it suitable for terrestrial nuclear instrumentation and medical radiation monitoring systems.
OPA27GUG4 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:
- -
- 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
OPA27GUG4 FAQ
1.How can I place an order for OPA27GUG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA27GUG4 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 OPA27GUG4 reliable?
The price and inventory of OPA27GUG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA27GUG4 is usually 5 days.
3.What payment methods are accepted for OPA27GUG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA27GUG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA27GUG4?
OPA27GUG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA27GUG4 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 OPA27GUG4?
For technical support, including OPA27GUG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA27GUG4 requirements.
6.How does Aetrix verify that OPA27GUG4 is sourced from the original manufacturer or authorized distributors?
All OPA27GUG4 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 OPA27GUG4 meets industry standards.
7.What is the process for return or replacement of OPA27GUG4?
All OPA27GUG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA27GUG4, 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 OPA27GUG4 part is unused and in its original packaging.
Return procedure for OPA27GUG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA27GUG4 Tags
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