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Texas Instruments OPA177GSG4
- Part No.:
- OPA177GSG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA177GSG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,661
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Product details
Overview
OPA177GSG4 from Texas Instruments is a precision bipolar operational amplifier designed for high-accuracy signal conditioning in low-drift, low-noise analog front-ends. It delivers 25 µV max input offset voltage, 0.3 µV/°C max offset drift, 134 dB min open-loop gain, ±15 V max common-mode input range, and operates from ±3 V to ±18 V dual supply (6–36 V single). It serves as a direct replacement for OP-07, OP-77, and AD707 in lab instrumentation and data acquisition systems.
For engineers reviewing the OPA177GSG4 datasheet, OPA177GSG4 pinout, OPA177GSG4 application, or OPA177GSG4 equivalent, this page provides verified specifications, SOIC-8 pin functions, thermal performance data, noise behavior at 1 Hz–100 Hz, and validated alternatives for precision DC-coupled amplification where long-term stability and thermoelectric error minimization are critical.
Technical Context
The OPA177GSG4 uses laser-trimmed bipolar input stage architecture with internal input bias current cancellation, eliminating need for external balancing resistors. Its offset trim terminals (Pins 1 & 8) support fine adjustment up to ±3 mV, while its 500-Ω series input resistors and diode clamps enable ±30-V differential input tolerance without damage.
It achieves unity-gain stability with 0.6 MHz closed-loop bandwidth and 0.3 V/µs slew rate, optimized for source impedances between 2 kΩ and 50 kΩ. Input voltage noise is 85 nVrms (1 Hz–100 Hz), and input bias current remains ≤±2 nA over –40°C to +85°C - enabling high-impedance sensor interfacing without significant DC error.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input offset voltage | ±25 µV (max) - ensures ≤25 µV DC error at output under nominal conditions, critical for sub-mV measurement accuracy |
| Offset voltage drift | ±0.3 µV/°C (max) - limits thermal-induced drift to <2.5 µV over 85°C ambient swing, enabling stable calibration |
| Open-loop gain | 134 dB (min) - provides ≥5 million V/V loop gain, supporting <0.1 ppm linearity in precision gain stages |
| Supply voltage range | ±3 V to ±18 V dual (6–36 V single) - supports industrial rails including ±15 V and 24 V systems without level-shifting |
| Input bias current | ±2 nA (max) - enables use with >100 MΩ sensor sources without significant IR drop or offset contribution |
| Common-mode range | ±13.5 V (min) - allows direct interface to ±10 V industrial signals with 3.5 V headroom to rails |
| Quiescent current | 2 mA (max) - reduces self-heating to <10 mW at ±15 V, minimizing warm-up drift in sealed enclosures |
Pinout & Package
OPA177GSG4 is supplied in an 8-pin SOIC (D package), 4.9 mm × 6 mm body size, RoHS-compliant with NiPdAu lead finish and MSL Level-3 moisture sensitivity rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +In (Pin 3) | Noninverting input | High-impedance node for reference or sensor signal; matched thermal path required to minimize thermoelectric offset |
| −In (Pin 2) | Inverting input | Feedback node; internal bias current cancellation eliminates need for external resistor matching |
| V+ (Pin 7) | Positive power supply | Accepts up to +18 V; requires local 0.1 µF ceramic decoupling to suppress supply noise coupling into input stage |
| V− (Pin 4) | Negative power supply | Accepts down to –18 V; symmetric rail operation improves CMRR and PSRR performance |
| VO (Pin 6) | Output | Drives ≥2 kΩ loads to ±13.5 V swing; short-circuit protected to ±35 mA continuous |
| Offset Trim (Pins 1 & 8) | Trim terminal pair | Connect 20 kΩ potentiometer wiper to Pin 1, ends to Pins 1 & 8; adjusts offset by ±3 mV max |
| No Internal Connection (Pin 5) | Unused terminal | Internally unconnected; must be left floating - no routing or grounding permitted |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed offset & drift | Eliminates factory calibration and external trimming circuitry, reducing BOM count and board area in metrology-grade designs |
| Internal input bias current cancellation | Removes requirement for equal resistance on both inputs, avoiding added Johnson noise and layout complexity in high-Z sensor interfaces |
| ±30-V differential input tolerance | Withstands transient overvoltage events in PLC I/O modules without external protection diodes or series resistors |
| Low 1-Hz–100-Hz noise (85 nVrms) | Maintains signal integrity in slow-sampling applications like temperature transmitters and strain gauge bridges |
| Unity-gain stable architecture | Enables direct use in buffer, integrator, and active filter configurations without compensation network design effort |
Applications
| Analog Input Module | Data Acquisition (DAQ) |
|---|---|
Use Scenario: Industrial analog input card digitizing 4–20 mA, ±10 V, and thermocouple signals in PLC backplanes. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier providing gain, level-shifting, and filtering before ADC sampling. Use Value: 0.3 µV/°C drift ensures <1 LSB error over 85°C ambient range in 16-bit systems; ±2 nA bias current avoids loading of high-Z RTD bridge sensors. |
Use Scenario: Portable battery-powered DAQ unit capturing low-frequency sensor data (e.g., pressure, humidity) at 10 SPS. IC Role / Device Role / Timing Role: Front-end signal conditioner rejecting thermoelectric EMFs and amplifying microvolt-level outputs. Use Value: Laser-trimmed offset and low warm-up drift (<1 µV after 30 min) enable stable zero-point calibration during field deployment. |
| Battery Test Equipment | Temperature Transmitter |
Use Scenario: High-accuracy battery impedance analyzer measuring mV-level AC voltage drops across cells under load. IC Role / Device Role / Timing Role: Low-noise, low-drift difference amplifier extracting small AC signals superimposed on large DC common-mode voltages. Use Value: 134 dB open-loop gain ensures <0.005% gain error in 1000× differential gain stages; 85 nVrms noise floor resolves 10 µV signals. |
Use Scenario: 2-wire 4–20 mA transmitter converting RTD or thermistor resistance to current using constant-current excitation. IC Role / Device Role / Timing Role: Precision current-source control amplifier maintaining excitation accuracy despite supply and temperature variation. Use Value: 25 µV max offset contributes <0.025°C error in Pt100 circuits; PSRR >125 dB rejects ripple from switching regulators powering the loop. |
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 |
|---|---|---|---|
| OPA277GSG4 | Same SOIC-8 package; 10 µV max offset, 0.1 µV/°C max drift - tighter initial spec but identical architecture and pinout | Better suited for metrology-grade calibrators requiring <10 µV absolute offset; same PCB layout and thermal management | Select OPA277GSG4 when initial offset budget is stricter than drift budget; verify long-term drift (0.3 µV/mo) matches system lifetime requirements |
| AD707JRZ | SOIC-8; 25 µV max offset, 0.2 µV/°C max drift; higher 1.8 mA quiescent current; different pin 1 orientation and trim configuration | Legacy industrial design compatibility; requires revalidation of offset nulling network due to non-identical trim terminal mapping | Choose AD707JRZ only for drop-in replacement in existing AD707-based boards; not recommended for new designs due to obsolescence risk and higher power |
Compared with OPA177GSG4, OPA277GSG4 offers lower initial offset at identical cost and footprint, while AD707JRZ trades higher power and aging uncertainty for legacy qualification - making OPA177GSG4 the optimal balance of performance, availability, and thermal stability for new precision analog designs.
Availability
OPA177GSG4 is available at Aetrix Electronics and suitable for analog input modules, data acquisition systems, and temperature transmitters requiring stable component supply across extended production lifecycles.
Supply support for OPA177GSG4 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 innovation.
The OPA177GSG4 belongs to TI's precision bipolar op amp product line, engineered specifically for DC-accurate signal conditioning in industrial process control, test equipment, and sensor interface applications where long-term drift and thermoelectric error dominate system error budgets.
FAQ
What is the maximum operating temperature range for the OPA177GSG4?
The OPA177GSG4 is rated for operation from –40°C to +85°C ambient temperature. Its electrical characteristics - including ±25 µV max offset voltage and ±0.3 µV/°C max drift - are guaranteed across this full range. Junction temperature must remain ≤150°C, and with its SOIC-8 package thermal resistance (RθJA = 160°C/W), proper PCB copper pour and airflow ensure safe operation at maximum supply and load conditions.
Does the OPA177GSG4 require external offset nulling in most applications?
No - the OPA177GSG4 features laser-trimmed input offset voltage and drift, rendering external nulling unnecessary in typical applications. Its ±25 µV max offset and ±0.3 µV/°C max drift meet requirements for 16-bit precision systems without adjustment. Offset trim pins (1 & 8) are provided only for cases demanding sub-10 µV residual error; improper use can introduce excess thermal drift.
Can the OPA177GSG4 drive a 600-Ω load reliably?
The OPA177GSG4 specifies ±12 V output swing into 1 kΩ and ±12.5 V into 10 kΩ, but does not guarantee full swing into 600 Ω. At that load, output voltage will compress due to its 60 Ω open-loop output resistance and ±35 mA short-circuit current limit. For 600-Ω driving, consider buffering with a rail-to-rail output op amp or verifying actual swing in simulation with TINA-TI models.
How does the OPA177GSG4 handle input overvoltage conditions?
The OPA177GSG4 incorporates 500-Ω series input resistors and diode clamps, allowing it to withstand ±30-V differential input voltage without damage. However, during overdrive, clamp conduction may distort slewing behavior in unity-gain followers. For robust overvoltage protection in harsh environments (e.g., PLC field wiring), TI recommends the OPA206 family instead - which integrates active overvoltage protection without external components.
Is the OPA177GSG4 pin-compatible with the OP-07 or AD707?
Yes - the OPA177GSG4 shares identical SOIC-8 pinout and electrical behavior with OP-07 and AD707, including pin assignments for +In, −In, V+, V−, Output, and offset trim. It is explicitly listed in TI documentation as a direct replacement. No PCB changes are required when upgrading from these legacy parts, though thermal layout and decoupling should follow OPA177GSG4's updated recommendations.
OPA177GSG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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:
- 20 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA177GSG4 FAQ
1.How can I place an order for OPA177GSG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA177GSG4 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 OPA177GSG4 reliable?
The price and inventory of OPA177GSG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA177GSG4 is usually 5 days.
3.What payment methods are accepted for OPA177GSG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA177GSG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA177GSG4?
OPA177GSG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA177GSG4 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 OPA177GSG4?
For technical support, including OPA177GSG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA177GSG4 requirements.
6.How does Aetrix verify that OPA177GSG4 is sourced from the original manufacturer or authorized distributors?
All OPA177GSG4 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 OPA177GSG4 meets industry standards.
7.What is the process for return or replacement of OPA177GSG4?
All OPA177GSG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA177GSG4, 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 OPA177GSG4 part is unused and in its original packaging.
Return procedure for OPA177GSG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA177GSG4 Tags
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