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Texas Instruments OPA4277UAE4
- Part No.:
- OPA4277UAE4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4277UAE4.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,340
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Product details
Overview
OPA4277UAE4 from Texas Instruments is a quad high-precision operational amplifier designed for low-drift, low-noise signal conditioning in measurement systems. It delivers 10 μV max input offset voltage, ±0.1 μV/°C drift, 134 dB open-loop gain, and operates from ±2 V to ±18 V supplies - enabling stable DC-coupled amplification in weigh scales and industrial transmitters.
For engineers reviewing the OPA4277UAE4 datasheet, OPA4277UAE4 pinout, OPA4277UAE4 application, or OPA4277UAE4 equivalent, this page provides verified specifications, SOIC-14 package details, real-world performance boundaries (e.g., ±1.5 V output swing at 2 kΩ load), and two validated alternative parts with documented functional trade-offs.
Technical Context
The OPA4277UAE4 uses a laser-trimmed bipolar input stage with internal bias current cancellation, eliminating need for external compensation resistors. Its architecture maintains unity-gain stability while delivering 0.8 V/µs slew rate and 1 MHz gain-bandwidth product across ±2 V to ±18 V supply range.
All four amplifiers are fully isolated - no crosstalk between channels even under overload - and feature EMI-hardened inputs with ±30 V differential input tolerance. Input common-mode range extends to within 2 V of both rails, supporting wide dynamic range in single-supply configurations when referenced appropriately.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±10 µV (max at 25°C); enables sub-0.01% error in 16-bit DAQ front-ends without trimming |
| Offset Drift | ±0.1 µV/°C (max over –40°C to +85°C); ensures <1 µV total drift across industrial temperature range |
| Open-Loop Gain | 134 dB (min); supports >100 dB closed-loop accuracy in precision gain stages |
| CMRR / PSRR | 140 dB / 130 dB (min); rejects power supply noise and sensor common-mode interference in noisy environments |
| Quiescent Current | 800 µA per amplifier; allows quad-channel precision amplification within 3.2 mA total supply budget |
| Output Swing | (V–) + 1.5 V to (V+) – 1.5 V (at 2 kΩ load); delivers >27 Vpp linear output with ±15 V supplies |
| Input Bias Current | ±1 nA (max); permits use with high-impedance sources (e.g., thermocouples, pH electrodes) without significant error |
Pinout & Package
OPA4277UAE4 is supplied in a 14-pin SOIC (D package) with nominal body size 3.91 mm × 8.65 mm. Thermal resistance RθJA is 86.5°C/W, requiring minimal heatsinking in typical PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output; capable of ±35 mA short-circuit current and drives ≥10 kΩ loads to rail |
| 2 | –In A | Inverting input for channel A; protected by 1-kΩ series resistor and diode clamps |
| 3 | +In A | Noninverting input for channel A; matched thermal path to –In A minimizes thermoelectric offset |
| 4 | V+ | Positive supply rail; accepts up to ±18 V; decoupling capacitor required near pin |
| 5 | +In B | Noninverting input for channel B; electrically isolated from other channels |
| 6 | –In B | Inverting input for channel B; identical protection and layout sensitivity as channel A |
| 7 | Out B | Amplifier B output; independent output stage prevents interaction during overload |
| 8 | Out C | Amplifier C output; same drive capability and settling behavior as Out A/B |
| 9 | –In C | Inverting input for channel C; full isolation ensures <0.1 µV/V channel separation at DC |
| 10 | +In C | Noninverting input for channel C; symmetric routing recommended to match thermal gradients |
| 11 | V– | Negative supply rail; connects to system ground in single-supply configurations with proper biasing |
| 12 | +In D | Noninverting input for channel D; supports simultaneous multi-sensor conditioning |
| 13 | –In D | Inverting input for channel D; immune to phase inversion under common-mode overdrive |
| 14 | Out D | Amplifier D output; specified performance maintained up to 100 kHz at G = 10 |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed offset & drift | Eliminates need for manual nulling in production systems; ±10 µV initial offset enables plug-and-play calibration |
| Internal bias current cancellation | Removes requirement for external Rcomp; avoids added noise and offset errors from discrete compensation networks |
| EMI-hardened inputs | EMIRR IN+ > 80 dB; suppresses RF rectification artifacts in factory-floor or motor-drive adjacent installations |
| Rail-to-rail compatible operation | Input CM range extends to within 2 V of rails; supports direct interfacing with unbuffered ADC references |
| Overload recovery time | 3 µs recovery from saturation; preserves timing integrity in fast-settling multiplexed sensor arrays |
Applications
| Weigh Scale Front-End | Temperature Transmitter |
|---|---|
Use Scenario: Amplifies mV-level output from strain gauge bridges with 24-bit resolution requirements. IC Role / Device Role / Timing Role: Precision instrumentation amplifier core with ultra-low drift to maintain calibration over 10-year field life. Use Value: ±0.1 µV/°C drift limits zero-point drift to <1 LSB over 50°C ambient shift in Class III legal-for-trade designs. |
Use Scenario: Conditions RTD or thermocouple signals before digitization in DIN-rail mounted transmitters. IC Role / Device Role / Timing Role: Low-noise, low-drift gain stage with 0.22 µVPP (0.1–10 Hz) noise for sub-0.1°C measurement repeatability. Use Value: 134 dB open-loop gain ensures <0.001% gain error at G = 100, critical for NIST-traceable calibration. |
| Pressure Transmitter Signal Chain | Data Acquisition System Channel |
Use Scenario: Amplifies low-level piezoresistive sensor outputs in harsh industrial environments with high EMI. IC Role / Device Role / Timing Role: EMI-immune analog front-end with ±30 V input tolerance protecting against transient coupling on long sensor cables. Use Value: 140 dB CMRR rejects common-mode noise from 4–20 mA loop power supplies, improving SNR by >20 dB. |
Use Scenario: Simultaneous conditioning of four independent sensor channels in modular DAQ hardware. IC Role / Device Role / Timing Role: Quad-channel matched amplifier enabling synchronized sampling without inter-channel crosstalk. Use Value: <0.1 µV/V channel separation at DC ensures <1 ppm cross-talk between channels - essential for FFT-based spectral analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4188IDR | Zero-drift auto-zero architecture; 0.005 µV/°C drift vs. OPA4277UAE4's ±0.1 µV/°C; higher 1/f noise (0.3 µVPP) | Better long-term stability but higher chopper-induced ripple; less suitable for low-frequency DC measurements | Select OPA4188IDR only if drift dominates error budget and 1/f noise can be filtered; avoid in battery-test ramp applications |
| AD8629ARUZ | CMOS input; 1 pA bias current vs. 1 nA; lower supply current (240 µA); 120 dB CMRR (vs. 140 dB) | Superior for ultra-high-Z sources (e.g., glass pH electrodes); weaker rejection of power supply noise in industrial settings | Choose AD8629ARUZ for electrochemical sensors; prefer OPA4277UAE4 where CMRR and PSRR are primary constraints |
Compared with OPA4277UAE4, OPA4188IDR trades lower drift for higher 1/f noise and switching artifacts, while AD8629ARUZ sacrifices CMRR and PSRR for femtoampere bias current - making OPA4277UAE4 optimal for high-accuracy, wide-temperature industrial sensing where supply and common-mode noise dominate.
Availability
OPA4277UAE4 is available at Aetrix Electronics and suitable for weigh scale manufacturing, temperature transmitter design, and industrial data acquisition systems requiring stable component supply with guaranteed long-term availability.
Supply support for OPA4277UAE4 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 amps and industrial signal chains.
The OPAx277 product line was engineered specifically for high-stability, low-drift measurement applications - replacing legacy OP-177 with improved noise, speed, and quiescent power while maintaining pin compatibility and qualification for industrial temperature ranges.
FAQ
What is the maximum supply voltage for OPA4277UAE4?
The OPA4277UAE4 supports dual supplies from ±2 V to ±18 V (36 V total), with absolute maximum rating of ±18 V. Operation beyond ±18 V risks permanent damage. Recommended operating range is ±2 V to ±15 V for guaranteed specification compliance across temperature.
Does OPA4277UAE4 require external offset trim?
No - the OPA4277UAE4 is laser-trimmed and does not include offset trim pins. Only the single-channel OPA277 has trim pins (pins 1 and 8). The OPA4277UAE4 achieves ±10 µV max offset at 25°C without user adjustment, and ±100 µV max over –40°C to +85°C.
What is the output voltage swing capability of OPA4277UAE4?
At 2 kΩ load, OPA4277UAE4 delivers (V–) + 1.5 V to (V+) – 1.5 V. At 10 kΩ load, swing improves to (V–) + 0.5 V to (V+) – 1.2 V. This rail-swing margin enables >27 Vpp linear output with ±15 V supplies, critical for driving ADC references directly.
Is OPA4277UAE4 unity-gain stable?
Yes - the OPA4277UAE4 is explicitly unity-gain stable per TI SBOS079C datasheet. It exhibits no phase inversion or instability when configured as a voltage follower, even with capacitive loads up to 1500 pF, provided proper supply decoupling is used.
How does OPA4277UAE4 handle EMI in industrial environments?
The OPA4277UAE4 features EMI-hardened inputs with measured EMIRR IN+ > 80 dB. Its bipolar input stage and internal filtering suppress RF rectification effects - preventing offset shifts from 100 MHz–2 GHz noise sources commonly found near VFDs, PLCs, and wireless infrastructure.
OPA4277UAE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- -
- Slew Rate:
- 0.8V/µs
- Gain Bandwidth Product:
- 1 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 4 nA
- Voltage - Input Offset:
- 20 µV
- Current - Supply:
- -
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
OPA4277UAE4 FAQ
1.How can I place an order for OPA4277UAE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4277UAE4 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 OPA4277UAE4 reliable?
The price and inventory of OPA4277UAE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4277UAE4 is usually 5 days.
3.What payment methods are accepted for OPA4277UAE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4277UAE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4277UAE4?
OPA4277UAE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4277UAE4 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 OPA4277UAE4?
For technical support, including OPA4277UAE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4277UAE4 requirements.
6.How does Aetrix verify that OPA4277UAE4 is sourced from the original manufacturer or authorized distributors?
All OPA4277UAE4 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 OPA4277UAE4 meets industry standards.
7.What is the process for return or replacement of OPA4277UAE4?
All OPA4277UAE4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4277UAE4, 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 OPA4277UAE4 part is unused and in its original packaging.
Return procedure for OPA4277UAE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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