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Texas Instruments OPA177FP
- Part No.:
- OPA177FP
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
OPA177FP.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,086
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Product details
Overview
OPA177FP from Texas Instruments is a precision bipolar operational amplifier optimized for low-offset, low-drift, low-noise instrumentation applications. It delivers 25 µV max input offset voltage, 0.3 µV/°C max offset drift, 134 dB min open-loop gain, and operates from ±3 V to ±18 V dual supply (6–36 V single supply), serving as a direct replacement for OP-07, OP-77, and AD707 in high-stability analog front-ends.
For engineers reviewing the OPA177FP datasheet, OPA177FP pinout, OPA177FP application, or OPA177FP equivalent, this device is selected for precision DC-coupled signal conditioning where thermally stable offset, minimal warm-up drift, and high CMRR are critical - especially in data acquisition, temperature transmitters, and battery test systems.
Technical Context
The OPA177FP uses laser-trimmed bipolar input stage architecture with internal input bias current cancellation, eliminating the need for external balancing resistors and reducing thermoelectric error sources. Its unity-gain stability and 0.6 MHz closed-loop bandwidth support robust DC-to-low-frequency amplification without phase compensation.
It features integrated 500-Ω series input resistors and diode clamps enabling ±30-V differential input tolerance, while its low 1.3 mA quiescent current minimizes self-heating-induced offset drift - a key design factor in lab-grade instrumentation requiring long-term measurement integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input offset voltage | ±25 µV (max) - enables sub-100-µV system-level DC error in 12-bit+ DAQ channels |
| Offset voltage drift | ±0.3 µV/°C (max) - ensures <1 µV total drift over 10°C ambient change, critical for uncooled field instruments |
| Open-loop gain | 134 dB (min) - provides >5 million V/V loop gain, supporting <0.0001% gain error in precision gain stages |
| Supply voltage range | ±3 V to ±18 V (dual) - supports rail-to-rail compatible industrial sensor interfaces up to ±15 V operation |
| Input bias current | ±2 nA (max) - allows use with high-impedance sources (e.g., RTD bridges, pH electrodes) without significant voltage drop |
| Input voltage noise | 85 nVRMS (0.1–100 Hz) - preserves signal integrity in low-frequency thermal and strain measurements |
| Quiescent current | 1.3 mA (typ) - reduces thermal gradient across PCB, limiting warm-up drift to <0.5 µV in first 30 minutes |
Pinout & Package
OPA177FP is supplied in an 8-pin plastic DIP (PDIP) package measuring 9.81 mm × 9.43 mm, with through-hole mounting and industry-standard pin spacing (0.3 inch). The package includes internal offset trim terminals and no internal connection on Pin 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +In (Pin 3) | Noninverting input | High-impedance node for reference or sensor signal routing; matched thermal path required vs. –In to minimize thermoelectric offset |
| –In (Pin 2) | Inverting input | Differential input node; internal bias current cancellation eliminates need for external balancing resistor |
| V+ (Pin 7) | Positive power supply | Accepts up to +18 V (dual) or +36 V (single); decoupling capacitor required within 1 cm for noise immunity |
| V− (Pin 4) | Negative power supply | Accepts down to –18 V (dual) or GND (single); symmetric layout with V+ reduces common-mode coupling |
| VO (Pin 6) | Output | Capable of ±14 V swing into ≥2 kΩ load; slew rate limited to 0.3 V/µs prevents overshoot in step-response-critical loops |
| Offset Trim (Pins 1 & 8) | Trim adjustment terminals | Supports ±3 mV external nulling range via 20-kΩ potentiometer; floating if unused |
| No Internal Connection (Pin 5) | NC | Internally unconnected; must be left floating - not tied to ground or supply |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed offset & drift | Eliminates factory calibration and external trimming circuitry, reducing BOM count and board area in production instrumentation |
| Internal input bias current cancellation | Removes requirement for matched input resistors, avoiding added noise and offset errors from resistor mismatch and thermal gradients |
| ±30-V differential input tolerance | Withstands transient overvoltage events in industrial I/O modules without external protection diodes or series resistors |
| Low warm-up drift | 1.3 mA quiescent current limits self-heating, enabling stable readings within 5 minutes of power-on in portable lab equipment |
| Unity-gain stable architecture | Operates reliably without external compensation in buffer, integrator, or gain-of-one configurations - simplifying layout and validation |
Applications
| Analog Input Module | Data Acquisition (DAQ) |
|---|---|
Use Scenario: Signal conditioning for 16-bit ADC inputs in PLC analog input cards handling 4–20 mA, thermocouple, and RTD signals. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier providing gain, filtering, and level-shifting before digitization. Use Value: ±25 µV offset and ±0.3 µV/°C drift ensure <0.01% full-scale error over temperature, meeting IEC 61000-6-2 immunity requirements. | Use Scenario: Front-end amplification in benchtop multichannel DAQ systems sampling at ≤10 kSPS with DC accuracy priority. IC Role / Device Role / Timing Role: Low-noise, low-drift gain stage preceding multiplexer and ADC, maintaining signal fidelity during channel switching. Use Value: 85 nVRMS (0.1–100 Hz) noise and 134 dB open-loop gain enable 1 μV resolution on 10 V full-scale ranges. |
| Battery Test System | Temperature Transmitter |
Use Scenario: High-accuracy voltage and current sensing during charge/discharge cycling of Li-ion cells under thermal stress. IC Role / Device Role / Timing Role: Bidirectional current-sense amplifier and cell-voltage monitor with programmable gain. Use Value: Low 1.3 mA quiescent current prevents self-heating-induced voltage drift during long-duration soak tests at 25°C ambient. | Use Scenario: 4–20 mA loop-powered transmitter converting RTD or thermistor resistance to current output in HVAC and process control. IC Role / Device Role / Timing Role: Precision bridge amplifier and voltage-to-current converter operating from loop power (≤4 mA available). Use Value: ±2 nA max input bias current avoids loading high-resistance RTD elements, preserving linearity across –40°C to +85°C range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA277GP | Same pinout, identical SOIC/PDIP packaging; 10 µV max offset (F grade), 0.1 µV/°C drift - tighter initial spec but same architecture | Preferred for new designs requiring guaranteed F-grade performance out-of-box; shares same layout and thermal profile | Select OPA277GP when initial offset budget is ≤10 µV and long-term drift must stay below 0.1 µV/°C over full temp range |
| AD707KPZ | Pin-compatible PDIP-8; 25 µV max offset, 0.3 µV/°C drift, but higher 2.2 mA quiescent current and 120 dB min open-loop gain | Suitable for legacy ADI-based designs; requires additional decoupling due to higher supply current noise | Choose AD707KPZ only for drop-in replacement in existing AD707-based boards where re-layout is prohibited |
Compared with OPA177FP, OPA277GP offers tighter initial offset and drift specs without changing PCB layout, while AD707KPZ provides functional equivalence in legacy systems but increases thermal load and reduces loop gain margin by 14 dB.
Availability
OPA177FP is available at Aetrix Electronics and suitable for analog input modules, data acquisition systems, and temperature transmitters requiring stable component supply across extended product lifecycles.
Supply support for OPA177FP 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 OPA177FP belongs to TI's precision bipolar op amp product line, engineered specifically for high-accuracy, low-drift DC signal conditioning in industrial instrumentation, test equipment, and sensor interface applications.
FAQ
What is the maximum supply voltage rating for the OPA177FP?
The OPA177FP has an absolute maximum supply voltage of 40 V (V+ to V−), with recommended operating range of ±3 V to ±18 V dual supply or 6 V to 36 V single supply. Exceeding 40 V risks permanent damage per TI's SBOS008A datasheet Section 6.1.
Does the OPA177FP require external offset nulling in typical applications?
No - the OPA177FP uses laser trimming to achieve ±25 µV max input offset voltage, making external nulling unnecessary in most implementations. Pins 1 and 8 support optional ±3 mV adjustment via a 20-kΩ potentiometer only if system-level calibration is required beyond the device's inherent specification.
Can the OPA177FP drive a 600-Ω load effectively?
The OPA177FP specifies ±12 V output swing into 1 kΩ and ±13.5 V into 2 kΩ. Driving 600 Ω falls outside tested conditions; output voltage will compress and slew rate degrade. For 600-Ω loads, TI recommends the OPA1611 or OPA1678 - both specified for 600-Ω drive with <0.0005% THD+N.
Is the OPA177FP pin-compatible with the OP-07CP?
Yes - the OPA177FP uses the same 8-pin PDIP footprint and identical pin functions (Pin 2 = –In, Pin 3 = +In, Pin 4 = V−, Pin 6 = VO, Pin 7 = V+) as the OP-07CP, enabling direct PCB replacement without layout changes. Both share offset trim pins (1 & 8) and NC (Pin 5).
What is the thermal resistance (RθJA) of the OPA177FP package?
The OPA177FP in PDIP-8 package has a junction-to-ambient thermal resistance (RθJA) of 100.0°C/W, per TI SBOS008A Section 6.4. This value assumes standard JEDEC 2-layer board conditions; actual board layout and copper area will affect real-world thermal performance.
OPA177FP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- 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
OPA177FP FAQ
1.How can I place an order for OPA177FP through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA177FP 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 OPA177FP reliable?
The price and inventory of OPA177FP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA177FP is usually 5 days.
3.What payment methods are accepted for OPA177FP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA177FP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA177FP?
OPA177FP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA177FP 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 OPA177FP?
For technical support, including OPA177FP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA177FP requirements.
6.How does Aetrix verify that OPA177FP is sourced from the original manufacturer or authorized distributors?
All OPA177FP 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 OPA177FP meets industry standards.
7.What is the process for return or replacement of OPA177FP?
All OPA177FP units undergo pre-shipment inspection (PSI). If there is an issue with OPA177FP, 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 OPA177FP part is unused and in its original packaging.
Return procedure for OPA177FP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA177FP Tags
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