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Analog Devices Inc. OP27GS-REEL
- Part No.:
- OP27GS-REEL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OP27GS-REEL.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,882
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Product details
Overview
OP27GS-REEL from Analog Devices is a low-noise, precision operational amplifier optimized for high-gain, low-drift signal conditioning in instrumentation and professional audio. It delivers 3.0 nV/√Hz input voltage noise density at 1 kHz, 0.2 µV/°C typical offset drift, 2.8 V/µs slew rate, 8 MHz gain bandwidth, and ±10 V output swing into 600 Ω. Its design enables accurate amplification of microvolt-level sensor outputs in stable integrators and microphone preamplifiers.
For engineers reviewing the OP27GS-REEL datasheet, OP27GS-REEL pinout, OP27GS-REEL application, or OP27GS-REEL equivalent, key selection criteria include low 1/f noise corner (2.7 Hz), guaranteed CMRR ≥120 dB at ±11 V common-mode voltage, ±40°C to +85°C operating range, and SOIC-8 packaging with validated nulling capability via Pins 1 and 8.
Technical Context
The OP27GS-REEL uses a bipolar input stage with on-chip Zener zap-trimming for initial offset calibration and a bias current cancellation circuit that maintains ±15 nA max input bias current over temperature. Its open-loop gain exceeds 1.5 million (V/mV) with 70 Ω output impedance, enabling stable operation at unity gain and up to 2000 pF capacitive load without external compensation.
Thermal performance is characterized by 158°C/W junction-to-ambient thermal resistance in SOIC-8 package, and long-term offset stability is specified at 0.2 µV/month. Input protection diodes limit differential voltage to ±0.7 V, requiring external current limiting if exceeded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Noise Density | 3.0 nV/√Hz at 1 kHz - enables clean amplification of low-level signals without significant white noise contribution |
| 0.1 Hz to 10 Hz p-p Noise | 0.08 µV p-p - supports precision DC-coupled measurements in slow-sampling systems |
| Input Offset Drift | 0.2 µV/°C typical - ensures minimal calibration drift across industrial temperature range |
| Slew Rate | 2.8 V/µs - sustains full-scale output transitions in <4 µs for 10 V step, critical for fast data acquisition |
| Gain Bandwidth Product | 8 MHz - allows stable closed-loop gain of 100 at 80 kHz or gain of 10 at 800 kHz |
| CMRR | 126 dB at ±11 V common-mode - rejects interference in single-supply-derived rails or noisy ground-referenced sensors |
| Output Swing | ±10 V into 600 Ω - drives professional audio line-level loads directly without buffer stages |
Pinout & Package
OP27GS-REEL is supplied in an 8-lead SOIC_N (Small Outline Integrated Circuit, narrow body) package with standard JEDEC MS-012AC footprint and 1.27 mm lead pitch. The package is RoHS-compliant, surface-mountable, and rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOS TRIM (−) | Connects to wiper of 10 kΩ potentiometer for offset nulling; adjusts VOS by ±4 mV |
| 2 | Inverting Input (−IN) | Differential input node; high-impedance bipolar junction with 3 GΩ common-mode resistance |
| 3 | Noninverting Input (+IN) | Differential input node; matched to Pin 2 for CMRR optimization |
| 4 | V− | Negative supply rail connection; must be decoupled locally with 0.1 µF ceramic capacitor |
| 5 | VOS TRIM (+) | Connects to one end of 10 kΩ potentiometer; completes offset adjustment network with Pin 1 |
| 6 | Output (OUT) | Class-AB output stage capable of ±10 V swing into 600 Ω with <0.001% THD+N at 1 kHz |
| 7 | V+ | Positive supply rail connection; supports ±4 V to ±18 V dual supply operation |
| 8 | No Connect (NC) | Internally unconnected; must remain floating per datasheet Figure 2 |
Key Features
| Feature | Design Value |
|---|---|
| Low 1/f noise corner | 2.7 Hz - minimizes low-frequency drift impact in DC-stable integrators and precision threshold detectors |
| Bias current cancellation | ±15 nA max IB over −40°C to +85°C - preserves accuracy with high-impedance sources like piezoelectric sensors |
| Unity-gain stability | Stable with >2000 pF capacitive load - eliminates need for isolation resistors in cable-driven audio or ADC driver applications |
| Zener zap-trimmed offset | 10 µV max VOS (G grade) - reduces system calibration burden in automated test equipment and medical instrumentation |
| High PSRR | ≥120 dB at DC - rejects ripple from shared power supplies in multi-channel data acquisition systems |
Applications
| Strain Gauge Signal Conditioning | Magnetic Tape Head Preamplifier |
|---|---|
Use Scenario: Amplifying mV-level Wheatstone bridge outputs from bonded foil strain gauges in load cells and pressure transducers. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier front-end with gain ≥1000 and sub-µV offset stability. Use Value: 0.2 µV/°C drift and 0.08 µV p-p 0.1–10 Hz noise ensure <0.01% measurement error over 40°C ambient variation without recalibration. | Use Scenario: Low-noise, direct-coupled preamplification of analog audio signals from professional reel-to-reel tape playback heads. IC Role / Device Role / Timing Role: First-stage voltage amplifier with wideband flat response (DC–20 kHz) and minimal self-magnetization risk. Use Value: 3.0 nV/√Hz noise density and <1500 Ω source impedance compatibility prevent audible hiss while preserving transient fidelity. |
| Stable Integrator for PID Control | Microphone Preamplifier (Condenser) |
Use Scenario: Building ultra-low-drift integrators in analog PID controllers for industrial motion systems requiring months-long zero stability. IC Role / Device Role / Timing Role: High-open-loop-gain (>1.5M) integrator core with low input bias current to minimize capacitor leakage-induced drift. Use Value: 0.2 µV/month long-term VOS stability and 3 GΩ input resistance enable integration time constants >10 seconds without significant baseline walk. | Use Scenario: High-gain, low-noise preamplification of 10–20 mV RMS signals from electret condenser microphones in studio recording interfaces. IC Role / Device Role / Timing Role: First-stage gain block with DC coupling, low input capacitance (8 pF), and 2.8 V/µs slew rate for transient headroom. Use Value: ±10 V output swing into 600 Ω and <0.001% THD+N at 1 kHz support clean line-level output without clipping on vocal peaks. |
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-REEL | Same die, PDIP-8 package; higher θJA (103°C/W) and no moisture sensitivity level rating | Preferred for through-hole prototyping or legacy PCBs; unsuitable for reflow assembly | Select OP27GS-REEL for surface-mount production; OP27GP-REEL only where DIP sockets or hand-soldering required |
| AD797ARZ | Lower 1.0 nV/√Hz noise, but 25 µV max VOS and 0.6 µV/°C drift; requires external compensation for stability | Better for ultra-low-noise AC-coupled audio; less suitable for DC-coupled precision integrators due to higher drift | Choose AD797ARZ when noise dominates specification; retain OP27GS-REEL when DC accuracy, drift, and ease of use are prioritized |
Compared with OP27GP-REEL, OP27GS-REEL offers superior thermal performance and SMT compatibility; compared with AD797ARZ, it trades 2 nV/√Hz higher noise for 3× lower drift and guaranteed unity-gain stability-making it more robust in mixed-signal industrial systems.
Availability
OP27GS-REEL is available at Aetrix Electronics and suitable for precision instrumentation, professional audio circuits, and industrial control systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for OP27GS-REEL 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with design centers worldwide and ISO 9001-certified manufacturing.
The OP27 series was developed specifically for high-accuracy, low-drift analog signal conditioning in test & measurement, medical instrumentation, and professional audio-emphasizing noise, drift, and stability over raw speed or power efficiency.
FAQ
What is the maximum capacitive load the OP27GS-REEL can drive without instability?
The OP27GS-REEL is unity-gain stable and can drive up to 2000 pF capacitive load while maintaining phase margin >70°, as verified in Figure 25 of the Rev. H datasheet. For loads exceeding 2000 pF, a 50 Ω series resistor inside the feedback loop is recommended to isolate the capacitance from the output node and preserve stability in applications such as cable-driven audio outputs or ADC input buffers.
Does the OP27GS-REEL require external offset nulling in typical applications?
The OP27GS-REEL features factory Zener zap-trimmed offset, with a guaranteed maximum input offset voltage of 100 µV (typical 10 µV) at 25°C. External nulling via Pins 1 and 8 is optional and only needed in applications demanding sub-5 µV offset after thermal cycling or long-term aging; most precision instrumentation designs operate within specification without adjustment.
How does the OP27GS-REEL's noise performance compare between 0.1 Hz–10 Hz and 1 kHz?
The OP27GS-REEL exhibits 0.08 µV p-p integrated noise from 0.1 Hz to 10 Hz and 3.0 nV/√Hz spectral density at 1 kHz. This reflects its low 2.7 Hz 1/f noise corner: below 10 Hz, flicker noise dominates the p-p value; above 100 Hz, white noise prevails. Designers selecting OP27GS-REEL for DC-coupled sensor interfaces rely on the p-p spec, while AC-coupled audio stages reference the 1 kHz density.
Can the OP27GS-REEL be used with single-supply operation?
The OP27GS-REEL is specified for dual-supply operation (±4 V to ±18 V) and does not support true single-supply rail-to-rail input or output. Its input common-mode range extends to ±11 V with ±15 V supplies, but operation with V− = 0 V violates absolute maximum ratings for input voltage and differential input voltage. For single-supply systems, consider rail-to-rail op amps such as AD8605 or ADA4077.
What is the thermal resistance (θJA) of the OP27GS-REEL in its SOIC-8 package?
The OP27GS-REEL in 8-lead SOIC_N package has a junction-to-ambient thermal resistance (θJA) of 158°C/W when soldered to a standard two-layer PCB with JEDEC-standard copper area, as specified in Table 6 of the Rev. H datasheet. This value assumes no internal thermal vias or enhanced heatsinking; actual board layout significantly impacts real-world thermal performance.
OP27GS-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2.8V/µs
- Gain Bandwidth Product:
- 8 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-REEL FAQ
1.How can I place an order for OP27GS-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for OP27GS-REEL 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-REEL reliable?
The price and inventory of OP27GS-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP27GS-REEL is usually 5 days.
3.What payment methods are accepted for OP27GS-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP27GS-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP27GS-REEL?
OP27GS-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP27GS-REEL 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-REEL?
For technical support, including OP27GS-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP27GS-REEL requirements.
6.How does Aetrix verify that OP27GS-REEL is sourced from the original manufacturer or authorized distributors?
All OP27GS-REEL 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-REEL meets industry standards.
7.What is the process for return or replacement of OP27GS-REEL?
All OP27GS-REEL units undergo pre-shipment inspection (PSI). If there is an issue with OP27GS-REEL, 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-REEL part is unused and in its original packaging.
Return procedure for OP27GS-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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