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Texas Instruments OPA177GS/2K5G4
- Part No.:
- OPA177GS/2K5G4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA177GS/2K5G4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,919
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Product details
Overview
OPA177GS/2K5G4 from Texas Instruments is a precision bipolar operational amplifier optimized for low-offset, low-drift, and low-noise instrumentation applications. It delivers 25 µV max input offset voltage, 0.3 µV/°C max offset drift, and 134 dB min open-loop gain, operating from ±3 V to ±18 V dual supply (or 6–36 V single supply). It serves as a direct replacement for OP-07, OP-77, and AD707 in high-stability analog front-ends for data acquisition and lab instrumentation.
For engineers reviewing the OPA177GS/2K5G4 datasheet, OPA177GS/2K5G4 pinout, OPA177GS/2K5G4 application, or OPA177GS/2K5G4 equivalent, key selection criteria include its laser-trimmed offset stability, internal input bias current cancellation, ±13.5 V output swing into 2 kΩ, and SOIC-8 package compatibility with standard PCB footprints for precision analog signal conditioning.
Technical Context
The OPA177GS/2K5G4 employs a laser-trimmed bipolar input stage with integrated input bias current cancellation, eliminating the need for external balancing resistors and reducing thermoelectric error sources. Its architecture achieves <0.3 µV/°C drift and <2 nA max input bias current over –40°C to +85°C, enabling stable DC-coupled measurements without warm-up drift.
It features unity-gain stability, 0.4 MHz closed-loop bandwidth at G = 1, and 0.1–0.3 V/µs slew rate-optimized for precision DC and low-frequency AC applications such as sensor signal conditioning and temperature transmitter front-ends where long-term accuracy outweighs speed requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input offset voltage | ±25 µV (max) - enables sub-100 µV system-level DC error in 16-bit DAQ channels |
| Offset voltage drift | ±0.3 µV/°C (max) - ensures <1 µV total drift over 10°C ambient change in lab environments |
| Open-loop gain | 134 dB (min) - supports >100 dB closed-loop accuracy with minimal gain error in precision buffers |
| Supply voltage range | ±3 V to ±18 V (dual), or 6–36 V (single) - compatible with industrial 24 V rails and legacy ±15 V systems |
| Input bias current | ±2 nA (max) - allows use with high-impedance sensors (e.g., RTDs, thermocouples) without significant voltage drop |
| Output voltage swing | ±13.5 V (min) into 2 kΩ - delivers full-scale dynamic range for ±12 V ADC drivers |
| Quiescent current | 1.3 mA (typ) - minimizes self-heating and thermal EMF errors in ultra-low-drift designs |
Pinout & Package
OPA177GS/2K5G4 is supplied in an 8-pin SOIC (D) package measuring 4.9 mm × 6 mm, RoHS-compliant with NiPdAu lead finish and MSL Level-3 moisture sensitivity rating. The package supports automated SMT assembly and is footprint-compatible with industry-standard SOIC-8 layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V− (Pin 4) | Power | Negative supply rail connection; must be decoupled locally to minimize noise coupling into input stage |
| V+ (Pin 7) | Power | Positive supply rail connection; requires 0.1 µF ceramic decoupling capacitor near pin for stability |
| IN− (Pin 2) | Input | Inverting input; internally compensated for bias current-no external balancing resistor needed |
| IN+ (Pin 3) | Input | Noninverting input; matched thermal path to IN− critical for minimizing thermoelectric offset drift |
| OUT (Pin 6) | Output | Amplified output node; capable of ±13.5 V swing into 2 kΩ load with <0.1% THD+N at 1 kHz |
| Offset Trim (Pins 1 & 8) | Adjustment | Laser-trimmed inputs; pins may be left floating for most applications-external potentiometer only required for <10 µV residual adjustment |
| No Internal Connection (Pin 5) | Terminal | Unused die pad; electrically isolated and may be left unconnected or tied to ground for mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed offset & drift | Eliminates factory calibration and external nulling circuitry, reducing BOM count and board area in production instrumentation |
| Internal input bias current cancellation | Removes need for input-resistor matching, avoiding added Johnson noise and layout-induced thermal gradients |
| Low 1/f noise (85 nVRMS, 0.1–100 Hz) | Maintains SNR > 100 dB in DC-coupled sensor interfaces with source impedances ≤50 kΩ |
| High PSRR (125 dB typ) | Rejects ripple and noise on shared power rails, critical for multi-channel DAQ systems sharing LDO outputs |
| Unity-gain stable architecture | Enables direct use in voltage followers and integrators without external compensation components |
Applications
| Analog Input Module | Data Acquisition (DAQ) |
|---|---|
Use Scenario: High-resolution analog input channel in PLC or industrial I/O module handling 4–20 mA, thermocouple, and RTD signals. IC Role / Device Role / Timing Role: Precision buffer and signal conditioner providing low-drift gain, common-mode rejection, and drive capability for successive-approximation ADCs. Use Value: Enables 16-bit effective resolution over –40°C to +85°C without recalibration, leveraging <0.3 µV/°C drift and 130 dB CMRR. | Use Scenario: Front-end amplifier in benchtop or portable DAQ system acquiring low-level sensor outputs with DC accuracy. IC Role / Device Role / Timing Role: Low-noise, low-drift gain stage preceding programmable-gain instrumentation amplifier and sigma-delta ADC. Use Value: Delivers 85 nVRMS integrated noise (0.1–100 Hz) and ±25 µV offset to preserve dynamic range in 24-bit measurement systems. |
| Battery Test Equipment | Temperature Transmitter |
Use Scenario: Voltage and current sensing in automated battery formation/cycling systems requiring microvolt-level DC stability. IC Role / Device Role / Timing Role: Precision current-sense amplifier and reference buffer ensuring accurate charge/discharge current monitoring over extended test cycles. Use Value: Long-term drift of 0.3 µV/month enables <10 ppm accuracy maintenance across 1000-hour test profiles without recalibration. | Use Scenario: Signal conditioning stage in 4–20 mA loop-powered temperature transmitters using RTD or thermistor sensors. IC Role / Device Role / Timing Role: Low-power, rail-to-rail compatible amplifier driving 4–20 mA current loop with high CMRR against common-mode noise on long cables. Use Value: 1.3 mA quiescent current and ±13.5 V output swing support operation from 24 V loop supply while maintaining >100 dB PSRR against line transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA206IDR | Integrated ±40 V input overvoltage protection; higher 0.6 µV/°C drift; 1.7 mA IQ | Required in harsh industrial environments with frequent input fault exposure (e.g., PLC analog inputs) | Select OPA206IDR when input robustness outweighs lowest possible drift; not pin-compatible-requires layout revision |
| AD707JRZ-REEL7 | Similar 25 µV offset but higher 0.6 µV/°C drift; 1.8 mA IQ; no internal bias cancellation | Legacy design continuity where AD707 footprint and qualification history are mandated | Choose AD707JRZ-REEL7 only for drop-in replacement in existing AD707-based designs; requires external bias resistor |
Compared with OPA177GS/2K5G4, the OPA206IDR trades lower drift for built-in overvoltage protection-critical for field-deployed equipment-but demands PCB redesign. The AD707JRZ-REEL7 matches legacy form factor and offset spec but lacks internal bias cancellation and exhibits higher thermal drift, increasing calibration burden in new designs.
Availability
OPA177GS/2K5G4 is available at Aetrix Electronics and suitable for analog input modules, data acquisition systems, and temperature transmitters requiring stable component supply across industrial temperature ranges and multi-year production cycles.
Supply support for OPA177GS/2K5G4 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 amplifiers and data converters.
The OPA177 product line was engineered specifically for high-accuracy, low-drift instrumentation applications-including sensor signal conditioning, precision voltage references, and metrology-grade measurement systems-where long-term stability and minimal thermal error dominate design requirements.
FAQ
What is the maximum operating temperature range for the OPA177GS/2K5G4?
The OPA177GS/2K5G4 is rated for operation from –40°C to +85°C ambient temperature, as specified in TI's Recommended Operating Conditions. This range is validated across all electrical characteristics including offset drift (±0.3 µV/°C max), input bias current (±2 nA max), and output swing (±12 V min), making it suitable for industrial and laboratory environments without derating.
Does the OPA177GS/2K5G4 require external offset nulling components?
No-the OPA177GS/2K5G4 uses laser trimming to achieve ±25 µV max input offset voltage and does not require external nulling for most applications. Pins 1 and 8 are provided for optional external trim (±3 mV range), but leaving them unconnected maintains full specified performance. External adjustment is discouraged unless sub-10 µV residual offset is mandatory, as it can introduce additional thermal drift.
Is the OPA177GS/2K5G4 unity-gain stable?
Yes, the OPA177GS/2K5G4 is explicitly unity-gain stable per TI's datasheet, supporting direct use in voltage followers, integrators, and non-inverting amplifiers with gain ≥1 without external compensation. This stability is verified across the full –40°C to +85°C range and under all recommended supply conditions (±3 V to ±18 V).
What package type and dimensions does the OPA177GS/2K5G4 use?
The OPA177GS/2K5G4 is packaged in an 8-pin SOIC (D) case measuring 4.9 mm × 6 mm, with NiPdAu lead finish and JEDEC MSL Level-3 rating (260°C peak reflow, 168-hour floor life). It ships in 2500-unit large tape-and-reel format (reel diameter 330 mm, width 12.4 mm), quadrant Q1 pin-1 orientation.
How does the OPA177GS/2K5G4 handle input overvoltage conditions?
The OPA177GS/2K5G4 incorporates 500 Ω series input resistors and diode clamps, allowing it to withstand ±30 V differential input voltage without damage. However, it lacks integrated overvoltage protection circuitry-unlike the OPA206 family-so sustained overvoltage events may affect accuracy. For robust field applications, external Schottky clamping or upgrading to OPA206 is recommended.
OPA177GS/2K5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
OPA177GS/2K5G4 FAQ
1.How can I place an order for OPA177GS/2K5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA177GS/2K5G4 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 OPA177GS/2K5G4 reliable?
The price and inventory of OPA177GS/2K5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA177GS/2K5G4 is usually 5 days.
3.What payment methods are accepted for OPA177GS/2K5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA177GS/2K5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA177GS/2K5G4?
OPA177GS/2K5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA177GS/2K5G4 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 OPA177GS/2K5G4?
For technical support, including OPA177GS/2K5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA177GS/2K5G4 requirements.
6.How does Aetrix verify that OPA177GS/2K5G4 is sourced from the original manufacturer or authorized distributors?
All OPA177GS/2K5G4 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 OPA177GS/2K5G4 meets industry standards.
7.What is the process for return or replacement of OPA177GS/2K5G4?
All OPA177GS/2K5G4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA177GS/2K5G4, 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 OPA177GS/2K5G4 part is unused and in its original packaging.
Return procedure for OPA177GS/2K5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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