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Analog Devices Inc./Maxim Integrated OP27GS+
- Part No.:
- OP27GS+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OP27GS+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:583
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Product details
Overview
OP27GS+ from Analog Devices (acquired Maxim Integrated) is a precision operational amplifier with 60 µV input offset voltage, 0.2 µV/°C offset drift, and 8 MHz gain-bandwidth product, used in high-accuracy instrumentation signal conditioning circuits.
For engineers reviewing the OP27GS+ datasheet, OP27GS+ pinout, OP27GS+ application, or OP27GS+ equivalent, key selection considerations include low noise (3 nV/√Hz at 10 kHz), fast settling time (2.5 µs to 0.01%), and ±4 V to ±18 V dual-supply operation.
Technical Context
The OP27GS+ employs a proprietary bipolar input stage delivering ultra-low input offset and drift. Its internal compensation ensures unity-gain stability without external components across its full operating temperature range of –40°C to +85°C.
It features laser-trimmed thin-film resistors for ratio matching and offset calibration, enabling high common-mode rejection (120 dB) and power supply rejection (130 dB) at DC and low frequencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 60 µV max - enables sub-100 µV system-level DC error in sensor front-ends |
| Offset Drift | 0.2 µV/°C max - maintains accuracy over industrial temperature range without recalibration |
| Gain-Bandwidth Product | 8 MHz - supports stable closed-loop gain ≥ 10 at 500 kHz signal bandwidth |
| Input Noise Density | 3 nV/√Hz at 10 kHz - preserves SNR in low-level transducer amplification |
| Settling Time | 2.5 µs to 0.01% - meets fast-data-acquisition timing in 16-bit SAR ADC drivers |
| Supply Voltage Range | ±4 V to ±18 V - interfaces directly with legacy industrial ±15 V rails |
Pinout & Package
OP27GS+ is housed in an 8-pin SOIC package (SOIC_N) with standard dual-opamp pinout. Lead finish is matte tin, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output | Amplified single-ended output node; drives loads ≥ 2 kΩ |
| 2 | Inverting Input | High-impedance differential input; connects to feedback network |
| 3 | Non-Inverting Input | High-impedance differential input; connects to reference or sensor signal |
| 4 | V– | Negative supply terminal; requires low-impedance bypass to ground |
| 5 | NC | No internal connection; must be left unconnected |
| 6 | NC | No internal connection; must be left unconnected |
| 7 | V+ | Positive supply terminal; requires low-impedance bypass to ground |
| 8 | Output Trim | Connects to external 10 kΩ potentiometer for manual offset nulling |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed input offset | Enables factory-calibrated DC accuracy without user trimming in production test |
| Low 1/f noise corner | 10 Hz corner frequency minimizes drift-induced errors in DC-coupled precision integrators |
| High PSRR & CMRR | 130 dB PSRR and 120 dB CMRR suppress supply ripple and common-mode interference in noisy environments |
| Internal frequency compensation | Guarantees stability at unity gain without external capacitors or layout-dependent parasitics |
Applications
| Strain Gauge Signal Conditioning | Thermocouple Amplifier Front-End |
|---|---|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from metal foil strain gauges in load cells. IC Role / Device Role / Timing Role: Precision DC-coupled difference amplifier with gain ≥ 1000 and offset nulling capability. Use Value: 60 µV offset and 0.2 µV/°C drift ensure ≤ 0.05% full-scale error over –10°C to +70°C ambient. | Use Scenario: Cold-junction compensation and linearization of Type K thermocouple signals. IC Role / Device Role / Timing Role: Low-drift instrumentation amplifier driver with programmable gain and offset trim. Use Value: 3 nV/√Hz input noise preserves microvolt-level thermocouple resolution at 1 Hz bandwidth. |
| High-Resolution Data Acquisition | Calibration Equipment Reference Stage |
Use Scenario: Driving 16-bit successive-approximation ADC inputs in portable test equipment. IC Role / Device Role / Timing Role: Fast-settling buffer amplifier with 2.5 µs to 0.01% and low distortion. Use Value: Settling performance prevents acquisition-time penalty and maintains effective number of bits (ENOB). | Use Scenario: Generating stable, low-drift reference voltages in automated calibration systems. IC Role / Device Role / Timing Role: Precision voltage follower with external trim for <1 ppm/°C output drift. Use Value: Laser-trimmed resistors and low drift enable traceable 0.001% voltage reference stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8675ARZ | Lower input bias current (1 pA vs. 150 nA), higher cost, rail-to-rail output | Preferred in battery-powered sensor nodes where input leakage matters | Use AD8675ARZ when ultra-low input bias current is required; OP27GS+ remains optimal for ±15 V industrial supplies |
| LT1028ACN8#PBF | Higher gain-bandwidth (50 MHz), higher noise (1.9 nV/√Hz), wider supply range (±4 V to ±22 V) | Better suited for wideband photodiode transimpedance amplifiers | Select LT1028ACN8#PBF only if >10 MHz bandwidth is needed; OP27GS+ delivers superior DC precision at lower cost |
Compared with AD8675ARZ and LT1028ACN8#PBF, the OP27GS+ provides the best balance of ultra-low offset drift, proven industrial reliability, and cost-effectiveness in ±15 V DC-coupled measurement systems where bandwidth ≤ 8 MHz suffices.
Availability
OP27GS+ is available at Aetrix Electronics and suitable for strain gauge interfaces, thermocouple signal chains, and high-resolution data acquisition requiring stable component supply across extended lifecycle support windows.
Supply support for OP27GS+ 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The OP27GS+ belongs to the OP27 family of precision op-amps designed specifically for DC-accurate instrumentation, sensor signal conditioning, and calibration-grade analog front-ends.
FAQ
Is OP27GS+ recommended for new designs?
No, OP27GS+ is marked "Not Recommended for New Designs" due to discontinuation of its original wafer process. It remains available for legacy support and existing production. For new designs, consider AD8675ARZ or LT1028ACN8#PBF as alternatives. OP27GS+ continues to be stocked by Aetrix Electronics for continuity of supply in maintenance and repair contexts.
What is the maximum supply voltage for OP27GS+?
The OP27GS+ supports dual-supply operation from ±4 V up to ±18 V. Absolute maximum ratings specify ±22 V, but operation beyond ±18 V risks parametric degradation and is not guaranteed. The OP27GS+ is commonly used with ±15 V rails in industrial instrumentation, aligning with its specified performance envelope.
Does OP27GS+ require external compensation?
No, OP27GS+ is internally compensated for unity-gain stability. No external capacitors or feedback networks are needed to ensure stability across its full gain range. This simplifies PCB layout and eliminates tuning during production. The OP27GS+ achieves this via on-die compensation capacitance optimized for its bipolar process and target bandwidth.
Can OP27GS+ drive ADC inputs directly?
Yes, OP27GS+ can directly drive 16-bit SAR ADC inputs when configured as a unity-gain buffer or gain stage. Its 2.5 µs settling time to 0.01%, low distortion, and ability to drive ≥2 kΩ loads make it suitable for driving mid-speed precision converters. For optimal performance, maintain proper supply bypassing and minimize trace inductance between OP27GS+ output and ADC input.
What is the purpose of Pin 8 (Output Trim) on OP27GS+?
Pin 8 on OP27GS+ is the output offset null terminal. It connects to the wiper of a 10 kΩ potentiometer whose ends tie to V+ and V–, allowing manual adjustment of input offset voltage to <5 µV in final system calibration. This feature is critical in applications like precision weigh scales where zero-point accuracy must be field-adjustable. The OP27GS+ datasheet specifies exact wiring and component values for this trim circuit.
OP27GS+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 17V/µs
- Gain Bandwidth Product:
- 63 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 15 nA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- -
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 8 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OP27GS+ FAQ
1.How can I place an order for OP27GS+ through Aetrix?
Please submit a Request for Quotation (RFQ) for OP27GS+ 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 OP27GS+ reliable?
The price and inventory of OP27GS+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP27GS+ is usually 5 days.
3.What payment methods are accepted for OP27GS+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP27GS+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP27GS+?
OP27GS+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP27GS+ 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 OP27GS+?
For technical support, including OP27GS+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP27GS+ requirements.
6.How does Aetrix verify that OP27GS+ is sourced from the original manufacturer or authorized distributors?
All OP27GS+ 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 OP27GS+ meets industry standards.
7.What is the process for return or replacement of OP27GS+?
All OP27GS+ units undergo pre-shipment inspection (PSI). If there is an issue with OP27GS+, 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 OP27GS+ part is unused and in its original packaging.
Return procedure for OP27GS+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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