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Analog Devices Inc./Maxim Integrated OP27EP+
- Part No.:
- OP27EP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
OP27EP+.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:336
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Product details
Overview
OP27EP+ from Analog Devices (formerly Maxim Integrated) is a precision bipolar operational amplifier with 0.1 μV/°C input offset voltage drift, 800 kHz gain-bandwidth product, and 2.8 V/μs slew rate, used in high-accuracy instrumentation amplifiers and sensor signal conditioning circuits.
For engineers reviewing the OP27EP+ datasheet, OP27EP+ pinout, OP27EP+ application, or OP27EP+ equivalent, key selection factors include low drift over temperature, low noise at 10 Hz (3.5 nV/√Hz), rail-to-rail output swing capability, and compatibility with ±15 V dual supplies in legacy test equipment designs.
Technical Context
The OP27EP+ employs a proprietary bipolar input stage optimized for low offset voltage and ultra-low drift, with internal trimming to achieve initial offset ≤25 μV. Its compensation architecture delivers stable unity-gain operation without external components across load capacitances up to 100 pF.
It operates from ±4 V to ±18 V supply rails, supports common-mode input range extending to within 2 V of the negative rail, and maintains 110 dB open-loop gain at DC with ≥100 dB power supply rejection ratio (PSRR) at 1 kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage Drift | 0.1 μV/°C - ensures minimal calibration drift over industrial temperature range (-55°C to +125°C) |
| Gain-Bandwidth Product | 800 kHz - enables stable closed-loop gain ≥100 at 1 kHz with phase margin >60° |
| Slew Rate | 2.8 V/μs - supports full-scale step response in <1 μs for 10 V output swing |
| Input Voltage Noise | 3.5 nV/√Hz @ 10 Hz - critical for low-frequency sensor front-ends (e.g., strain gauge bridges) |
| Supply Voltage Range | ±4 V to ±18 V - compatible with legacy ±15 V industrial control and bench instrumentation rails |
| Open-Loop Gain | 110 dB - provides ≥60 dB loop gain at 100 kHz for precision integrator stability |
Pinout & Package
OP27EP+ is housed in an 8-pin hermetically sealed metal can package (TO-99), designed for high-reliability military and aerospace applications with low thermal resistance (θJA = 120°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null | Connects to external 10 kΩ potentiometer wiper for manual input offset trimming |
| 2 | Inverting Input | Differential input node with 1012 Ω input impedance and 25 μV max initial offset |
| 3 | Non-Inverting Input | Differential input node matched to Pin 2 for common-mode rejection >120 dB |
| 4 | V– | Negative supply terminal; must be decoupled to ground with ≥0.1 μF ceramic capacitor |
| 5 | Offset Null | Second terminal of external nulling potentiometer; symmetric with Pin 1 for balanced adjustment |
| 6 | Output | Capable of driving ≥10 mA into 2 kΩ load with <0.01% THD+N at 1 kHz |
| 7 | V+ | Positive supply terminal; requires local 0.1 μF ceramic bypass near package |
| 8 | Case | Internally connected to V–; must be soldered to PCB ground plane for EMI suppression |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input offset drift | 0.1 μV/°C enables uncalibrated operation over -55°C to +125°C without performance degradation |
| Low 1/f noise corner | 2.7 Hz corner frequency minimizes flicker noise impact in DC-coupled precision integrators |
| High PSRR | ≥100 dB at 1 kHz rejects ripple from linear regulators in sensitive analog measurement paths |
| Matched input bias currents | ±20 nA max difference reduces offset error in high-impedance transducer interfaces |
| Hermetic TO-99 packaging | Provides long-term parameter stability in humid or corrosive environments per MIL-STD-883 |
Applications
| Strain Gauge Signal Conditioning | High-Voltage Data Acquisition Front-End |
|---|---|
Use Scenario: Amplifying mV-level bridge outputs from load cells in factory floor weighing systems. IC Role / Device Role / Timing Role: Primary instrumentation amplifier gain stage with 1000× non-inverting configuration. Use Value: 0.1 μV/°C drift prevents recalibration every 8-hour shift under ambient temperature swings. | Use Scenario: Buffering and level-shifting ±10 V sensor outputs before 16-bit SAR ADC sampling. IC Role / Device Role / Timing Role: Rail-to-rail output driver isolating ADC input from multiplexer switching transients. Use Value: 2.8 V/μs slew rate ensures <50 ns settling to 0.001% for 10 V steps, preserving effective resolution. |
| DC-Coupled Precision Integrator | Legacy Bench Power Supply Error Amplifier |
Use Scenario: Building 100-second time-constant integrators for laser diode current control loops. IC Role / Device Role / Timing Role: Low-drift op-amp in Miller configuration with 10 nF polypropylene capacitor. Use Value: 3.5 nV/√Hz noise at 10 Hz avoids integration of low-frequency noise that would cause output drift. | Use Scenario: Regulating output voltage in ±15 V linear lab power supplies with 0.01% setpoint accuracy. IC Role / Device Role / Timing Role: Error amplifier comparing DAC-set reference against sense resistor feedback. Use Value: 110 dB open-loop gain ensures <10 μV regulation error despite 100 ppm resistor tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP27GP+ | Same core die but in plastic DIP-8; 0.2 μV/°C drift (vs. 0.1 μV/°C); higher 10 Hz noise (5.5 nV/√Hz) | Acceptable for commercial-grade instrumentation where hermeticity and extended temp range not required | Select OP27GP+ only if cost sensitivity outweighs long-term drift stability needs |
| AD797ARZ | Lower noise (1 nV/√Hz), wider GBW (110 MHz), but higher quiescent current (10 mA vs. 4.5 mA) and no offset null pins | Better for wideband low-noise preamps; unsuitable for manual offset trimming or low-power battery systems | Choose AD797ARZ when bandwidth and noise dominate over power and trimmability requirements |
Compared with OP27EP+, OP27GP+ trades hermetic reliability and ultra-low drift for lower cost in benign environments, while AD797ARZ offers superior AC performance at the expense of DC precision adjustability and power efficiency.
Availability
OP27EP+ is available at Aetrix Electronics and suitable for legacy system repair, military avionics maintenance, and high-reliability test equipment requiring stable component supply across extended temperature ranges.
Supply support for OP27EP+ 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 acquired Maxim Integrated in 2021 and maintains legacy product support including military-qualified precision op-amps.
The OP27EP+ belongs to Maxim's legacy precision op-amp family, engineered specifically for applications demanding extreme DC accuracy and long-term parameter stability in harsh environments.
FAQ
Is OP27EP+ recommended for new designs?
No, OP27EP+ is Not Recommended for New Designs per Analog Devices' official product advisory. Its fabrication process was discontinued, and no new wafer starts are planned. For new projects, engineers should evaluate modern alternatives like the AD867x series or consult Analog Devices' technical support for qualified replacements that meet current manufacturing and reliability standards. OP27EP+ remains supported for legacy repair and sustainment.
What is the maximum operating temperature range for OP27EP+?
The OP27EP+ is specified for operation from -55°C to +125°C, validated per MIL-STD-883 test methods. This extended range is enabled by its hermetic TO-99 metal can package and internal die design. The 0.1 μV/°C input offset voltage drift holds across this full range, making OP27EP+ suitable for aerospace and downhole industrial applications where thermal cycling is severe.
Does OP27EP+ require external compensation capacitors?
No, OP27EP+ is internally compensated for unity-gain stability and does not require external compensation capacitors. Its 800 kHz gain-bandwidth product and optimized phase margin allow stable operation with closed-loop gains ≥1 without added components. However, a 0.1 μF ceramic capacitor must be placed between each supply pin (Pin 4 and Pin 7) and ground to ensure high-frequency PSRR and prevent oscillation.
Can OP27EP+ drive capacitive loads directly?
OP27EP+ can drive capacitive loads up to 100 pF while maintaining ≥60° phase margin and stable step response. For loads exceeding 100 pF, a series isolation resistor (typically 10–100 Ω) must be added between the OP27EP+ output (Pin 6) and the capacitive load to preserve stability. This limitation arises from the interaction between the op-amp's output impedance and load capacitance, not from output current capability.
What is the purpose of Pins 1 and 5 on OP27EP+?
Pins 1 and 5 on OP27EP+ are dedicated offset null terminals. They connect to the two ends of an external 10 kΩ potentiometer, with the wiper tied to V– (Pin 4). Adjusting this potentiometer injects opposing currents into the input stage to cancel residual input offset voltage. This manual trimming capability allows achieving <5 μV total system offset in high-precision applications where auto-zero or chopper architectures are unsuitable due to noise or EMI concerns.
OP27EP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- 10 nA
- Voltage - Input Offset:
- 10 µV
- Current - Supply:
- -
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 44 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
OP27EP+ FAQ
1.How can I place an order for OP27EP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for OP27EP+ 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 OP27EP+ reliable?
The price and inventory of OP27EP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP27EP+ is usually 5 days.
3.What payment methods are accepted for OP27EP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP27EP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP27EP+?
OP27EP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP27EP+ 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 OP27EP+?
For technical support, including OP27EP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP27EP+ requirements.
6.How does Aetrix verify that OP27EP+ is sourced from the original manufacturer or authorized distributors?
All OP27EP+ 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 OP27EP+ meets industry standards.
7.What is the process for return or replacement of OP27EP+?
All OP27EP+ units undergo pre-shipment inspection (PSI). If there is an issue with OP27EP+, 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 OP27EP+ part is unused and in its original packaging.
Return procedure for OP27EP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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