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Analog Devices Inc. OP177FSZ-REEL7
- Part No.:
- OP177FSZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OP177FSZ-REEL7.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,225
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Product details
Overview
OP177FSZ-REEL7 from Analog Devices is an ultraprecision bipolar-input operational amplifier optimized for high closed-loop gain, low-drift instrumentation and sensor signal conditioning. It delivers 25 μV max input offset voltage, 0.3 μV/°C max offset drift, 130 dB min CMRR, 115 dB min PSRR, and 12 V/μV typical open-loop gain at ±15 V supply - enabling sub-microvolt accuracy in thermocouple amplifiers and precision differential stages.
For engineers reviewing the OP177FSZ-REEL7 datasheet, OP177FSZ-REEL7 pinout, OP177FSZ-REEL7 application, or OP177FSZ-REEL7 equivalent, key selection criteria include guaranteed offset stability over temperature, absence of chopper-induced noise or spikes, compatibility with standard SOIC-8 sockets, and validated performance in cold-junction compensation and absolute-value amplifier topologies.
Technical Context
The OP177FSZ-REEL7 employs a proprietary bipolar input stage with on-chip laser-trimmed resistors (R2A/R2B) to achieve ultralow offset and drift. Its open-loop gain remains stable across ±10 V output swing, supporting high-accuracy linear amplification without gain nonlinearity errors.
It features dual VOS trim terminals for external nulling, operates from ±3 V to ±18 V supplies, and maintains 120 dB CMRR up to 1 kHz - critical for rejecting common-mode interference in low-level DC-coupled measurements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 25 μV max at 25°C - enables direct amplification of microvolt-level thermocouple outputs without zero-error correction circuitry |
| Offset Voltage Drift | 0.3 μV/°C max - ensures <1 μV total drift over 0–70°C industrial range, eliminating recalibration in field-deployed sensors |
| CMRR | 130 dB min - rejects >3 million-to-1 common-mode interference, essential for bridge sensor interfaces with shared ground paths |
| Open-Loop Gain | 12 V/μV typical - sustains >100 dB loop gain at 100× closed-loop gain, guaranteeing <0.001% gain error in precision integrators |
| Supply Current | 2.0 mA max - allows operation from low-power ±15 V rails while maintaining full precision specs, compatible with legacy analog test equipment |
| Input Resistance | 200 GΩ common-mode - prevents loading of high-impedance pH electrodes or piezoelectric transducers |
| Output Swing | ±13.5 V into 10 kΩ - delivers rail-to-rail usable dynamic range within ±15 V supplies, preserving headroom for anti-aliasing filtering |
Pinout & Package
OP177FSZ-REEL7 is housed in an 8-lead SOIC_N (S-Suffix, R-8) package per JEDEC MS-012-AA, with 1.27 mm lead pitch and 5.00 × 4.00 mm body dimensions. Thermal resistance θJA = 158°C/W (PCB mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOS TRIM | Connects to external 20 kΩ potentiometer wiper for factory-calibrated offset nulling; required for sub-5 μV system-level accuracy |
| 2 | −IN | Inverting input node; high-impedance bipolar junction with matched base-emitter pairs for minimal input bias current mismatch |
| 3 | +IN | Noninverting input node; symmetric layout to −IN ensures optimal CMRR and TCVOS tracking |
| 4 | V− | Negative supply terminal; must be decoupled with 0.1 µF ceramic + 10 µF tantalum for PSRR integrity below 10 Hz |
| 5 | NC | No connect - internal die pad not bonded; electrically isolated to prevent parasitic coupling in high-CMRR layouts |
| 6 | OUT | Class-A output stage with 60 Ω open-loop resistance; drives ≥2 kΩ loads without phase reversal or slew limiting |
| 7 | V+ | Positive supply terminal; supports ±3 V to ±18 V operation; PSRR remains >110 dB across full range |
| 8 | VOS TRIM | Second trim terminal - completes 3-terminal nulling network with Pin 1 and external resistor; enables bidirectional offset adjustment |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow offset voltage | 25 μV max eliminates need for manual zeroing in weigh-scale front-ends and medical ECG amplifiers |
| Outstanding offset drift | 0.3 μV/°C max ensures <0.5 μV total drift over 85°C operating range - critical for unattended environmental monitoring |
| High open-loop gain linearity | 12 V/μV maintained across ±10 V output swing prevents harmonic distortion in precision integrators and active filters |
| Bipolar input architecture | Delivers chopper-level precision without switching noise, enabling clean 1/f noise floor down to 0.1 Hz for seismic sensor interfaces |
| SOIC-8 footprint compatibility | Direct drop-in replacement for legacy OP07/OP177P in space-constrained industrial PLC I/O modules |
Applications
| Thermocouple Amplifier | Precision Differential Sensor Interface |
|---|---|
Use Scenario: Amplifying S-type thermocouple output (10.3 μV/°C) from 0°C to 1000°C with cold-junction compensation using a diode-based reference. IC Role / Device Role / Timing Role: Primary gain-stage op-amp providing 973× closed-loop gain while rejecting ambient thermal EMFs via 130 dB CMRR. Use Value: Achieves ±0.2°C measurement accuracy without software calibration, verified per Figure 27 in datasheet. | Use Scenario: Conditioning low-level bridge outputs (e.g., 2 mV/V load cell) in weigh scales with 100 dB dynamic range requirement. IC Role / Device Role / Timing Role: High-gain differential amplifier (R1=R3=1 kΩ, R2=R4=1 MΩ) rejecting common-mode noise from long sensor cables. Use Value: Limits worst-case gain linearity error to 0.02% and TCVOS contribution to 0.0003%/°C per Table 6. |
| Precision Absolute Value Circuit | Low-Drift Threshold Detector |
Use Scenario: Converting bipolar AC signals (e.g., vibration sensor output) to unipolar DC for RMS-to-DC conversion in predictive maintenance systems. IC Role / Device Role / Timing Role: Core op-amp in Figure 31 topology, where both OP177 units operate in common-mode to cancel offset drift. Use Value: Maintains <10 μV absolute error across −1 V to +1 V input range due to matched TCVOS and high open-loop gain. | Use Scenario: Detecting overtemperature events in motor windings using a precision bandgap reference and RTD feedback. IC Role / Device Role / Timing Role: Comparator-amplifier in Figure 33 configuration, setting VTH with 0.1% tolerance and rejecting supply ripple via 115 dB PSRR. Use Value: Delivers <1 mV threshold hysteresis and <10 μs response time without external Schmitt trigger components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OP07DR | Higher 75 μV max VOS and 1.2 μV/°C max TCVOS; lower 114 dB CMRR; no VOS trim pins | Suitable for cost-sensitive DC amplifiers where ±2°C thermal accuracy is acceptable | Select when board area is constrained and offset trimming is performed digitally post-acquisition |
| AD8675ARZ | Zero-drift auto-zero architecture; 10 μV max VOS but introduces 1.5 μV p-p chopper noise at 100 kHz; 140 dB CMRR | Better for sub-μV offset-critical applications but unsuitable for low-noise audio or seismic sensing | Prefer for battery-powered portable instruments requiring lowest possible initial offset, accepting higher 1/f noise |
Compared with OP07DR and AD8675ARZ, the OP177FSZ-REEL7 uniquely balances ultralow drift, absence of switching artifacts, and proven SOIC-8 reliability in industrial temperature cycling - making it the preferred choice for metrology-grade analog front-ends where long-term stability outweighs initial offset minimization.
Availability
OP177FSZ-REEL7 is available at Aetrix Electronics and suitable for thermocouple signal conditioning, precision differential amplification, absolute value conversion, cold-junction compensation, and low-drift threshold detection requiring stable component supply across extended temperature ranges.
Supply support for OP177FSZ-REEL7 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, headquartered in Wilmington, MA.
The OP177FSZ-REEL7 belongs to Analog Devices' ultraprecision op-amp product line, engineered specifically for DC-coupled instrumentation, sensor signal chains, and metrology systems demanding sub-microvolt stability over time and temperature.
FAQ
What is the maximum operating temperature range for the OP177FSZ-REEL7?
The OP177FSZ-REEL7 is rated for continuous operation from −40°C to +85°C, matching the extended industrial temperature range specified in the Ordering Guide. This range is validated per Table 2 electrical characteristics and Absolute Maximum Ratings, ensuring full parameter compliance including 0.3 μV/°C max TCVOS and 130 dB min CMRR across the entire span.
Does the OP177FSZ-REEL7 require external offset nulling components?
The OP177FSZ-REEL7 includes dedicated VOS TRIM pins (1 and 8) for external nulling using a 20 kΩ potentiometer, as shown in Figure 4. While the device achieves 25 μV max VOS without trimming, external adjustment can reduce residual offset to <1 μV - critical for applications like precision weigh scales where zero-error directly impacts measurement validity.
How does the OP177FSZ-REEL7 compare to chopper-stabilized amplifiers in noise performance?
Unlike chopper-stabilized amplifiers, the OP177FSZ-REEL7 uses a bipolar input stage with no switching clock, eliminating chopper spikes and high-frequency noise. Its 118 nV rms input noise (0.1–10 Hz) and flat 10 nV/√Hz spectral density above 10 Hz provide cleaner low-frequency signal integrity - verified in Figures 18–19 - making it superior for seismic, ECG, and thermocouple applications sensitive to switching artifacts.
Can the OP177FSZ-REEL7 drive capacitive loads without instability?
Yes - the OP177FSZ-REEL7 can drive large capacitive loads stably using the isolation technique in Figure 29: a 100 Ω series resistor placed inside the feedback loop. Due to its high open-loop gain (12 V/μV), the resistor's effect on output impedance is negligible, enabling reliable operation with >10 nF loads in data acquisition multiplexers and piezoelectric charge amplifiers.
Is the OP177FSZ-REEL7 RoHS compliant?
Yes, the "Z" suffix in OP177FSZ-REEL7 explicitly denotes RoHS compliance per the Ordering Guide (Page 14). It meets EU Directive 2011/65/EU requirements, including lead-free terminations and exemption-compliant materials, and is suitable for environmentally regulated industrial and medical equipment.
OP177FSZ-REEL7 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:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.3V/µs
- Gain Bandwidth Product:
- 600 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1.2 nA
- Voltage - Input Offset:
- 10 µV
- Current - Supply:
- 1.6mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 6 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OP177FSZ-REEL7 FAQ
1.How can I place an order for OP177FSZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for OP177FSZ-REEL7 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 OP177FSZ-REEL7 reliable?
The price and inventory of OP177FSZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP177FSZ-REEL7 is usually 5 days.
3.What payment methods are accepted for OP177FSZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP177FSZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP177FSZ-REEL7?
OP177FSZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP177FSZ-REEL7 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 OP177FSZ-REEL7?
For technical support, including OP177FSZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP177FSZ-REEL7 requirements.
6.How does Aetrix verify that OP177FSZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All OP177FSZ-REEL7 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 OP177FSZ-REEL7 meets industry standards.
7.What is the process for return or replacement of OP177FSZ-REEL7?
All OP177FSZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with OP177FSZ-REEL7, 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 OP177FSZ-REEL7 part is unused and in its original packaging.
Return procedure for OP177FSZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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