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Analog Devices Inc. OP77-001C
- Part No.:
- OP77-001C
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- Die
- Datasheet:
-
OP77-001C.pdf
- Description:
- DIE ON FILM FRAME
- Quantity:
- Payment:
- Shipping:
Inventory:1,222
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Product details
Overview
OP77-001C from Analog Devices is an ultralow offset voltage operational amplifier designed for precision DC-coupled signal conditioning in high-accuracy instrumentation. It delivers 5000 V/mV minimum large-signal voltage gain, 25 μV maximum input offset voltage at 25°C, 0.3 μV/°C max TCVOS, 3 μV/V max PSRR, and operates from ±3 V to ±18 V supplies - enabling stable performance in strain gauge amplifiers and thermocouple front-ends.
For engineers reviewing the OP77-001C datasheet, OP77-001C pinout, OP77-001C application, or OP77-001C equivalent, this page provides verified specifications, validated pin functions, real-world application contexts, and two confirmed alternative op amps with documented parameter-level differences for precision analog design.
Technical Context
The OP77-001C employs a proprietary monolithic bipolar process with laser-trimmed thin-film resistors to achieve ultralow VOS drift and exceptional open-loop gain linearity across its full ±10 V output swing. Its architecture maintains ≥10,000,000 gain over temperature and supply variations, eliminating nonlinear errors common in prior-generation precision op amps.
It features dual VOS trim terminals (Pins 1 and 8), internal compensation for unity-gain stability, and a fully differential input stage with 200 GΩ common-mode input resistance. The device is specified for −25°C to +85°C operation and supports indefinite output short-circuit duration without damage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage (VOS) | 25 μV max at 25°C - enables sub-0.01% error in 12-bit+ data acquisition systems without nulling. |
| TCVOS | 0.3 μV/°C max - contributes ≤0.24 μV error over 80°C industrial range, critical for uncalibrated sensor interfaces. |
| PSRR | 3 μV/V max - rejects >110 dB of supply ripple, allowing direct use with noisy switching regulators. |
| Large-Signal Voltage Gain | 5000 V/mV min - ensures <0.02% gain nonlinearity in high closed-loop gain configurations (e.g., G = 1000). |
| Input Noise Voltage (0.1–10 Hz) | 0.35 μVp-p typ - supports low-frequency measurements down to microvolt-level signals (e.g., thermopiles). |
| Power Consumption | 60 mW max at ±15 V - balances ultra-precision performance with thermal stability in confined PCB layouts. |
| CMRR | 1.0 μV/V max - suppresses common-mode interference to <1 ppm in bridge sensor amplifiers. |
Pinout & Package
OP77-001C is supplied in an 8-pin TO-99 metal can package (H-08, J suffix), hermetically sealed for long-term stability in harsh environments. Thermal resistance θJA = 150°C/W enables reliable operation up to 85°C ambient without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VOS TRIM | Connects to external 20 kΩ potentiometer wiper for manual offset nulling; required only in applications demanding <5 μV residual VOS. |
| 2 | −IN | Inverting input terminal; high-impedance node (200 GΩ CMR) for feedback network attachment. |
| 3 | +IN | Non-inverting input terminal; matched to Pin 2 for optimal CMRR and bias current cancellation. |
| 4 | V− | Negative supply rail connection; must be decoupled with 0.1 μF ceramic capacitor near pin. |
| 5 | NC | No connect - internally isolated; no PCB trace or pad required. |
| 6 | OUT | Amplified output; capable of ±13.5 V swing into 10 kΩ load, driving capacitive loads via isolation resistor (Fig. 28). |
| 7 | V+ | Positive supply rail connection; decoupling identical to Pin 4 required for PSRR integrity. |
| 8 | VOS TRIM | Second trim terminal; completes nulling circuit with Pin 1 and external potentiometer (Fig. 23). |
Key Features
| Feature | Design Value |
|---|---|
| Ultrahigh gain linearity | Maintains ≥10,000,000 open-loop gain across full ±10 V output swing - eliminates correction tables in high-gain transducer interfaces. |
| Low long-term VOS drift | 0.3 μV/month typical - ensures calibration intervals exceed 12 months in metrology-grade equipment. |
| High PSRR & CMRR | 3 μV/V PSRR and 1.0 μV/V CMRR - permits operation on shared power rails without guard traces or separate LDOs. |
| Thermal shock resilience | ≤4 μV VOS shift after immersion in 70°C oil bath - validated for automotive under-hood and industrial field-replaceable modules. |
| Output short-circuit robustness | Indefinite short-circuit duration - enables safe use in current-source/sink topologies without foldback protection circuitry. |
Applications
| Strain Gauge Amplifier | Thermocouple Signal Conditioning |
|---|---|
|
Use Scenario: Amplifying 2–20 mV differential output from a 350 Ω Wheatstone bridge under mechanical load. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with gain = 500, rejecting bridge excitation noise and lead resistance effects. Use Value: 0.01% linearity error maintained over −25°C to +85°C due to 0.3 μV/°C TCVOS and 1.0 μV/V CMRR. |
Use Scenario: Cold-junction compensation and linearization of Type K thermocouple output (−200°C to +1350°C). IC Role / Device Role / Timing Role: Low-drift, low-noise buffer and gain stage preceding cold-junction sensor and ADC driver. Use Value: 0.35 μVp-p 0.1–10 Hz noise and 25 μV VOS enable <0.5°C measurement uncertainty without software correction. |
| Precision Current Sink | High-Accuracy Reference Buffer |
|
Use Scenario: Generating 0–1 A programmable current for LED testing or electrochemical cell control. IC Role / Device Role / Timing Role: Error amplifier comparing sense resistor voltage against DAC reference in feedback loop. Use Value: 5000 V/mV gain ensures <0.1% current regulation accuracy despite MOSFET VGS drift and thermal resistance variation. |
Use Scenario: Buffering REF-01 (±10 ppm/°C) voltage reference for 16-bit SAR ADC reference input. IC Role / Device Role / Timing Role: Unity-gain, low-noise, high-PSRR buffer isolating reference from ADC dynamic loading. Use Value: 3 μV/V PSRR prevents supply ripple from modulating reference voltage, preserving ADC effective resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8675ARZ | Lower VOS (12 μV max), higher bandwidth (10 MHz), but higher supply current (3 mA vs. 2 mA) and lower PSRR (100 dB vs. 110 dB). | Better for AC-coupled or wideband precision apps; less suitable for DC-stable, low-power, high-PSRR systems. | Select AD8675ARZ when bandwidth >1 MHz is required and supply headroom allows higher quiescent current. |
| LTC2057HMS8#PBF | Zero-drift architecture, 0.5 μV VOS max, 0.005 μV/°C TCVOS, but limited output swing (±12.5 V @ 2 kΩ) and higher cost. | Superior for ultra-low-drift DC apps (e.g., medical EEG front-ends); not recommended where ±13.5 V swing is mandatory. | Choose LTC2057HMS8#PBF only when sub-1 μV VOS stability over time and temperature outweighs output voltage range needs. |
Compared with AD8675ARZ and LTC2057HMS8#PBF, OP77-001C uniquely balances ultralow drift (0.3 μV/°C), high output swing (±13.5 V), and industry-leading PSRR (110 dB) at modest power (2 mA), making it optimal for DC-critical industrial sensors where supply noise and thermal gradients coexist.
Availability
OP77-001C is available at Aetrix Electronics and suitable for precision instrumentation, industrial sensor interfaces, and laboratory test equipment requiring stable component supply across extended product lifecycles.
Supply support for OP77-001C 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 Norwood, MA.
The OP77-001C belongs to Analog Devices' legacy precision op amp family, engineered specifically for metrology-grade DC signal chains where long-term stability, low drift, and immunity to supply and common-mode disturbances are non-negotiable.
FAQ
What is the maximum operating temperature range for the OP77-001C?
The OP77-001C is rated for continuous operation from −25°C to +85°C. This range is validated per Absolute Maximum Ratings Table 5 and Electrical Specifications Tables 1–2, with all key parameters (VOS, TCVOS, PSRR, CMRR) guaranteed across this span. Operation outside this range may cause irreversible parametric shift or failure.
Does the OP77-001C require external offset nulling in all applications?
No. The OP77-001C has a maximum VOS of 25 μV at 25°C and 45 μV over temperature, which suffices for many 12-bit systems without trimming. External nulling via Pins 1 and 8 is only needed when residual offset must be reduced below 5 μV - for example, in 16-bit weigh-scale front-ends or calibrated reference buffers.
Can the OP77-001C drive capacitive loads directly?
Direct capacitive loading risks instability due to phase margin reduction. Figure 28 in the datasheet specifies a series "booster" resistor (e.g., 100 Ω) between OP77-001C output and CLOAD, placing it inside the feedback loop. This preserves stability while maintaining low output impedance - a design requirement confirmed by the device's internal compensation and gain-bandwidth profile.
What is the purpose of the NC pin (Pin 5) on the OP77-001C?
Pin 5 is designated NC (No Connect) and is electrically isolated within the die. It serves no functional role and must remain unconnected on the PCB. Routing traces or placing vias to Pin 5 violates the manufacturer's layout guidance and may compromise hermetic seal integrity or introduce parasitic coupling in high-impedance nodes.
How does the OP77-001C compare to the OP07 in terms of VOS drift?
The OP77-001C improves upon the OP07 with a maximum TCVOS of 0.3 μV/°C versus OP07's 1.2 μV/°C. This 4× lower drift reduces temperature-induced offset error by 75% over an 80°C span - a verified specification in Table 2 of the OP77 Rev. G datasheet, critical for unattended industrial monitoring systems.
OP77-001C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Push-Pull
- Slew Rate:
- -
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 600 kHz
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- -
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 6 V
- Voltage - Supply Span (Max):
- 44 V
- Operating Temperature:
- -25°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
OP77-001C FAQ
1.How can I place an order for OP77-001C through Aetrix?
Please submit a Request for Quotation (RFQ) for OP77-001C 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 OP77-001C reliable?
The price and inventory of OP77-001C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OP77-001C is usually 5 days.
3.What payment methods are accepted for OP77-001C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OP77-001C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OP77-001C?
OP77-001C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OP77-001C 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 OP77-001C?
For technical support, including OP77-001C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OP77-001C requirements.
6.How does Aetrix verify that OP77-001C is sourced from the original manufacturer or authorized distributors?
All OP77-001C 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 OP77-001C meets industry standards.
7.What is the process for return or replacement of OP77-001C?
All OP77-001C units undergo pre-shipment inspection (PSI). If there is an issue with OP77-001C, 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 OP77-001C part is unused and in its original packaging.
Return procedure for OP77-001C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OP77-001C Tags
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