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Texas Instruments OPA177FPG4
- Part No.:
- OPA177FPG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
OPA177FPG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,037
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Product details
Overview
OPA177FPG4 from Texas Instruments is a precision bipolar operational amplifier optimized for low-drift, low-noise instrumentation applications. It delivers 10 µV max input offset voltage, 0.1–0.3 µV/°C offset drift, 134 dB min open-loop gain, and operates from ±3 V to ±18 V dual supply (6–36 V single). It serves as front-end signal conditioner in high-accuracy analog input modules and temperature transmitters.
For engineers reviewing the OPA177FPG4 datasheet, OPA177FPG4 pinout, OPA177FPG4 application, or OPA177FPG4 equivalent, key selection criteria include guaranteed offset drift over –40°C to +85°C, laser-trimmed input bias current cancellation, absence of chopper-induced switching artifacts, and compatibility with ±13.5 V output swing into 2 kΩ loads.
Technical Context
The OPA177FPG4 employs a laser-trimmed bipolar input stage with internal input bias current cancellation, eliminating the need for external balancing resistors and reducing thermoelectric error contributions. Its architecture avoids chopper stabilization, preserving wideband noise performance and avoiding digital switching interference in sensitive analog paths.
It features integrated 500 Ω series input protection resistors and diode clamps enabling ±30 V differential input tolerance without damage. The device is unity-gain stable and supports rail-to-rail output swing within ±13.5 V under 2 kΩ load at ±15 V supply, with 0.4–0.6 MHz closed-loop bandwidth at G = 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input offset voltage | ±10 µV (max, F grade) - enables sub-16-bit DC accuracy without trimming in 24-bit DAQ front ends |
| Offset voltage drift | ±0.1 µV/°C (max, F grade, –40°C to +85°C) - ensures <1 µV total drift across industrial temperature range |
| Open-loop gain | 134 dB (min) - provides >10⁶ loop gain for high-precision closed-loop configurations at DC |
| Supply voltage range | ±3 V to ±18 V (dual), 6 V to 36 V (single) - supports legacy ±15 V systems and modern wide-range industrial supplies |
| Input bias current | ±0.5 nA (max, F grade, 25°C) - minimizes voltage error across high-impedance sensor bridges and RTD sense networks |
| Output voltage swing | ±13.5 V (min, RL ≥ 2 kΩ, ±15 V supply) - delivers full dynamic range into standard instrumentation loads |
| Quiescent current | 1.3 mA (typ) - reduces self-heating and warm-up drift critical in lab-grade calibration equipment |
Pinout & Package
OPA177FPG4 is supplied in an 8-pin PDIP (plastic dual in-line package) with 9.81 mm × 9.43 mm footprint. This through-hole package supports prototyping, manual assembly, and legacy board designs requiring socketed op amps.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +In (Pin 3) | Noninverting input | High-impedance node for reference or sensor signal routing; matched thermal path required to minimize thermoelectric offset |
| –In (Pin 2) | Inverting input | Feedback node in closed-loop configurations; internal bias current cancellation eliminates need for external balancing resistor |
| V+ (Pin 7) | Positive power supply | Highest potential rail; requires local 0.1 µF ceramic decoupling to suppress supply noise coupling into high-gain stages |
| V− (Pin 4) | Negative power supply | Lowest potential rail; must be referenced to system ground or negative supply; same decoupling applies as V+ |
| VO (Pin 6) | Output | Capacitive-load limited; stable at unity gain but degrades with >100 pF; avoid long traces to prevent oscillation |
| Offset Trim (Pins 1 & 8) | Offset voltage adjustment terminals | Optional 20 kΩ potentiometer connection; leave floating for factory-trimmed performance; not intended for system-level offset correction |
| No Internal Connection (Pin 5) | Unused terminal | Internally unconnected; may be left floating or tied to ground per layout best practice; no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed offset and drift | Eliminates production calibration steps and external trim components, reducing BOM count and test time in automated test equipment |
| Internal input bias current cancellation | Removes requirement for equal dc resistance at both inputs, simplifying PCB layout and improving noise performance in high-Z sensor interfaces |
| Low 1/f noise (85 nVrms, 0.1–100 Hz) | Maintains signal integrity in slow-sampling applications like temperature measurement and battery monitoring where flicker noise dominates |
| ±30 V differential input rating | Withstands transient overvoltage events common in industrial field wiring without external protection circuitry |
| Unity-gain stability | Enables direct use in voltage followers and active filters without compensation networks, accelerating design validation |
Applications
| Analog Input Module | Data Acquisition (DAQ) |
|---|---|
|
Use Scenario: Signal conditioning of 4–20 mA current loops and thermocouple outputs in PLC analog I/O cards. IC Role / Device Role / Timing Role: Precision buffer and gain stage before ADC sampling; rejects common-mode noise while preserving microvolt-level signal fidelity. Use Value: Enables 18+ ENOB in 24-bit sigma-delta DAQ systems by contributing <0.5 µV RMS input-referred noise and <0.3 µV/°C drift over operating range. |
Use Scenario: Front-end amplification in portable handheld multimeters and benchtop DMMs. IC Role / Device Role / Timing Role: Low-drift, low-noise gain block preceding auto-ranging and digitization; handles both DC and low-frequency AC measurements. Use Value: Supports 7½-digit resolution by limiting offset drift contribution to <1 ppm of full-scale reading across 8-hour warm-up period. |
| Battery Test Equipment | Temperature Transmitter |
|
Use Scenario: Voltage and current sensing during electrochemical impedance spectroscopy (EIS) and capacity cycling tests. IC Role / Device Role / Timing Role: High-precision current shunt amplifier and cell voltage monitor; operates continuously under varying thermal conditions. Use Value: Delivers <±2 µV total offset error over 24-hour test cycle, enabling accurate coulomb counting and state-of-charge estimation. |
Use Scenario: Linearization and amplification of RTD or thermistor signals in 4–20 mA HART-enabled field transmitters. IC Role / Device Role / Timing Role: Cold-junction compensation amplifier and bridge excitation driver; interfaces directly with 2-wire or 3-wire sensor configurations. Use Value: Achieves <0.1°C measurement uncertainty over –40°C to +85°C ambient due to ultra-low thermal EMF sensitivity and matched input thermal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision bipolar op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA206IDR | Includes integrated ±40 V input overvoltage protection; higher quiescent current (1.8 mA typ); FET input (lower bias current but higher voltage noise) | Better suited for harsh industrial I/O where input fault robustness is prioritized over lowest possible 1/f noise | Select OPA206IDR when input protection beyond ±30 V is required and chopper-free operation remains essential |
| AD707JRZ | Higher offset drift (0.6 µV/°C max); lower open-loop gain (126 dB min); same SO-8/PDIP packaging; legacy product with longer lead times | Acceptable for cost-sensitive lab instruments where 0.1 µV/°C drift is not mandatory | Choose AD707JRZ only if existing design qualification mandates drop-in replacement and thermal drift budget allows ≥0.6 µV/°C |
Compared with OPA177FPG4, the OPA206IDR trades ultra-low drift for enhanced input ruggedness, while the AD707JRZ offers functional equivalence at relaxed drift specs and reduced supply rejection-making OPA177FPG4 optimal for new designs demanding highest DC precision without sacrificing bipolar noise performance.
Availability
OPA177FPG4 is available at Aetrix Electronics and suitable for analog input modules, battery test systems, and temperature transmitters requiring stable component supply across extended industrial lifecycles.
Supply support for OPA177FPG4 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of heritage in precision op amp design and manufacturing.
The OPA177FPG4 belongs to TI's precision bipolar op amp family, engineered specifically for high-accuracy DC-coupled instrumentation where chopper artifacts, excessive drift, or input bias current errors must be eliminated.
FAQ
What is the maximum operating temperature range for the OPA177FPG4?
The OPA177FPG4 is specified for operation from –40°C to +85°C ambient temperature. Electrical characteristics including offset voltage drift (±0.1 µV/°C max, F grade), input bias current (±0.5 nA max), and open-loop gain (134 dB min) are guaranteed across this full industrial temperature range, making it suitable for deployment in uncontrolled environments such as factory floors and outdoor field instruments.
Does the OPA177FPG4 require external offset nulling in typical applications?
No, the OPA177FPG4 does not require external offset nulling in typical applications. It features laser-trimmed input offset voltage (±10 µV max, F grade) and drift (±0.1 µV/°C max), which eliminates the need for manual trimming in most precision circuits. The offset trim pins (1 and 8) are provided only for specialized cases where system-level calibration is necessary, and leaving them unconnected preserves factory-optimized performance.
Can the OPA177FPG4 drive capacitive loads reliably?
The OPA177FPG4 is unity-gain stable but exhibits degraded phase margin with capacitive loads exceeding ~100 pF. For loads >100 pF, external isolation resistance (e.g., 10–100 Ω in series with the output) is recommended to maintain stability. This limitation arises from its bipolar output stage topology and should be verified via SPICE simulation or bench testing when driving ADC input capacitors or long cables.
How does the OPA177FPG4 compare to chopper-stabilized amplifiers in noise performance?
The OPA177FPG4 avoids chopper stabilization entirely, delivering 85 nVrms (0.1–100 Hz) low-frequency noise without switching artifacts or charge injection errors. Unlike chopper op amps, it maintains clean spectral purity below 1 kHz-critical for precision DC measurements and low-frequency sensor interfaces where ripple or intermodulation distortion would corrupt measurement integrity.
Is the OPA177FPG4 pin-compatible with the OP-07 or OP-177?
Yes, the OPA177FPG4 is pin-compatible with the OP-07, OP-77, and OP-177 in the 8-pin PDIP package. It shares identical pinout (including offset trim pins 1/8 and NC pin 5), supply voltage range, and output swing capability. This allows direct substitution in legacy designs without PCB modification, while delivering improved offset drift (0.1 vs. 0.6 µV/°C), higher open-loop gain (134 vs. 126 dB), and lower quiescent current (1.3 vs. 2.2 mA).
OPA177FPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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:
- 500 pA
- Voltage - Input Offset:
- 10 µV
- Current - Supply:
- 1.3mA
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
OPA177FPG4 FAQ
1.How can I place an order for OPA177FPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA177FPG4 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 OPA177FPG4 reliable?
The price and inventory of OPA177FPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA177FPG4 is usually 5 days.
3.What payment methods are accepted for OPA177FPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA177FPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA177FPG4?
OPA177FPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA177FPG4 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 OPA177FPG4?
For technical support, including OPA177FPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA177FPG4 requirements.
6.How does Aetrix verify that OPA177FPG4 is sourced from the original manufacturer or authorized distributors?
All OPA177FPG4 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 OPA177FPG4 meets industry standards.
7.What is the process for return or replacement of OPA177FPG4?
All OPA177FPG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA177FPG4, 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 OPA177FPG4 part is unused and in its original packaging.
Return procedure for OPA177FPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA177FPG4 Tags
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