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Texas Instruments OPA2277UAG4
- Part No.:
- OPA2277UAG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2277UAG4.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,651
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Product details
Overview
OPA2277UAG4 from Texas Instruments is a dual-channel, high-precision operational amplifier designed for low-drift, low-noise signal conditioning in precision analog front-ends. 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 use in battery-powered instrumentation and industrial sensor interfaces.
For engineers reviewing the OPA2277UAG4 datasheet, OPA2277UAG4 pinout, OPA2277UAG4 application, or OPA2277UAG4 equivalent, key selection criteria include its ultralow 0.22 µVPP (0.1–10 Hz) input noise, dual-channel independence for bridge amplifier topologies, ±1 nA max input bias current, and guaranteed performance across –40°C to +85°C.
Technical Context
The OPA2277UAG4 employs a laser-trimmed, bipolar-input architecture optimized for DC precision and low-frequency stability. Its input stage integrates internal bias current cancellation, eliminating the need for external compensation resistors while maintaining <±1 nA bias current and <±50 µV offset over temperature.
It features fully independent dual amplifiers with >140 dB CMRR and >130 dB PSRR, supporting stable unity-gain operation without phase reversal. Channel separation exceeds 100 dB at DC, ensuring minimal crosstalk in multi-channel transducer signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±10 µV max - enables sub-16-bit accuracy in 24-bit ADC front-ends without trimming |
| Offset Drift | ±0.1 µV/°C max - ensures <±1 µV total drift over full –40°C to +85°C operating range |
| 0.1–10 Hz Noise | 0.22 µVPP - critical for precision DC measurements like strain gage and thermocouple amplification |
| Open-Loop Gain | 134 dB min - supports high closed-loop accuracy (e.g., <0.001% gain error at G=100) |
| Supply Range | ±2 V to ±18 V - accommodates both low-voltage portable systems and industrial ±15 V rails |
| Quiescent Current | 800 µA per amplifier - allows dual-channel precision operation in power-constrained battery designs |
| CMRR / PSRR | 140 dB / 130 dB min - rejects common-mode interference and supply ripple in noisy environments |
Pinout & Package
OPA2277UAG4 is housed in an 8-pin SOIC (D) package (3.91 mm × 4.90 mm), with exposed thermal pad connected to V− for improved thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Out A) | Output channel A | Low-impedance buffered output; capable of ±35 mA short-circuit current |
| 2 (–In A) | Inverting input channel A | Differential input node; protected by 1-kΩ series resistor and diode clamps |
| 3 (+In A) | Noninverting input channel A | Differential input node; matched thermal path to –In A minimizes thermoelectric drift |
| 4 (V−) | Negative supply rail | Reference for all internal circuitry; thermal pad must be soldered to PCB ground plane |
| 5 (+In B) | Noninverting input channel B | Independent second channel input; identical specs and layout isolation as channel A |
| 6 (–In B) | Inverting input channel B | Independent second channel input; no electrical or thermal coupling to channel A |
| 7 (Out B) | Output channel B | Fully independent output; supports separate feedback networks without crosstalk |
| 8 (V+) | Positive supply rail | Power supply connection; requires local 0.1-µF decoupling capacitor per rail |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed offset & drift | Eliminates need for manual nulling in most applications; maintains ±10 µV / ±0.1 µV/°C across temperature |
| Internal bias current cancellation | Removes requirement for external Rcomp, simplifying PCB layout and improving long-term stability |
| Unity-gain stable, no phase reversal | Enables direct use in voltage followers and integrators without external compensation |
| Robust input protection | Withstands ±30 V differential input without damage; safe for sensor disconnect/reconnect scenarios |
| Dual-channel independence | Channel separation >100 dB at DC prevents interaction in dual-sensor or differential-output systems |
Applications
| Transducer Amplifier | Bridge Amplifier |
|---|---|
|
Use Scenario: Amplifying mV-level outputs from load cells and pressure sensors in industrial weighing systems. IC Role / Device Role: Primary signal-conditioning amplifier with programmable gain and offset calibration. Use Value: 0.22 µVPP (0.1–10 Hz) noise and ±10 µV offset enable <0.01% full-scale measurement accuracy. |
Use Scenario: Reading Wheatstone bridge outputs in strain gauge-based structural health monitoring. IC Role / Device Role: Instrumentation-grade differential amplifier with matched channel tracking. Use Value: 140 dB CMRR and dual-channel independence suppress common-mode bridge excitation noise. |
| Temperature Measurement | Battery-Powered Instrument |
|
Use Scenario: Cold-junction compensation and linearization of thermocouple signals in data loggers. IC Role / Device Role: Precision cold-junction reference amplifier with ultra-low thermal EMF sensitivity. Use Value: Matched input thermal paths and ±0.1 µV/°C drift minimize self-heating errors in thermopile interfaces. |
Use Scenario: Signal conditioning in handheld multimeters and portable gas analyzers. IC Role / Device Role: Dual-channel analog front-end supporting simultaneous voltage/current measurement. Use Value: 800 µA per amplifier quiescent current enables >100-hour battery life on two AA cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2188AIDR | Zero-drift auto-zero architecture; 0.003 µV/°C drift vs OPA2277UAG4's ±0.1 µV/°C | Better for <100 ppm/°C drift-critical systems; higher 1/f noise (0.35 µVPP) than OPA2277UAG4 | Choose OPA2188AIDR when drift dominates error budget; choose OPA2277UAG4 for lowest broadband noise |
| AD8628ARZ | Chopper-stabilized; 0.5 µV max offset but higher 10-Hz noise (1.1 nV/√Hz) vs OPA2277UAG4's 8 nV/√Hz | Suitable for ultra-low-offset DC apps; less optimal for AC-coupled sensor signals due to switching artifacts | Choose AD8628ARZ for sub-microvolt offset needs; choose OPA2277UAG4 for clean wideband analog signal chains |
Compared with OPA2188AIDR and AD8628ARZ, the OPA2277UAG4 offers superior 0.1–10 Hz noise performance and lower 10-Hz noise density, making it preferred for precision DC and low-frequency AC measurements where chopper artifacts or excess 1/f noise are unacceptable.
Availability
OPA2277UAG4 is available at Aetrix Electronics and suitable for transducer amplification, bridge sensing, temperature measurement, and battery-powered instrumentation requiring stable component supply and long-term parametric consistency.
Supply support for OPA2277UAG4 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 delivering analog and embedded processing solutions, with over 50 years of precision amplifier innovation and manufacturing excellence.
The OPAx277 product line was engineered specifically for high-accuracy, low-drift analog signal conditioning in test equipment, industrial process control, and scientific instrumentation - replacing legacy OP-177 with improved noise, speed, and power efficiency.
FAQ
What is the maximum supply voltage for OPA2277UAG4?
The OPA2277UAG4 supports a total supply voltage (V+ to V−) up to ±18 V (36 V total), with recommended operation between ±5 V and ±15 V. Absolute maximum ratings allow 36 V, but specified electrical performance is guaranteed only within the ±2 V to ±18 V operating range per the datasheet.
Does OPA2277UAG4 require external offset trim components?
No - the OPA2277UAG4 is laser-trimmed during manufacturing and achieves ±10 µV max input offset voltage without external adjustment. Trim pins are not provided on this dual variant; only the single-channel OPA277 includes offset adjust pins (1 and 8).
Can OPA2277UAG4 drive capacitive loads?
Yes - the OPA2277UAG4 is stable with capacitive loads up to 1500 pF when configured in unity gain, as verified in Figure 19 of the SBOS079B datasheet. For loads >500 pF, consider adding a small series resistor (10–50 Ω) at the output to maintain phase margin.
What is the input voltage range for OPA2277UAG4?
The OPA2277UAG4 features a rail-to-rail input common-mode range of (V−)+2 V to (V+)-2 V. For example, with ±15 V supplies, inputs operate from –13 V to +13 V - excluding the outer 2 V near each rail to ensure specified CMRR and bias current performance.
Is OPA2277UAG4 pin-compatible with other OPA2277 variants?
Yes - all OPA2277 variants (including UAG4, UA, PA, and P) share identical 8-pin SOIC pinouts and electrical specifications. The "G4" suffix denotes TI's Green (RoHS-compliant, lead-free) packaging standard, with no functional or mechanical differences from other SOIC versions.
OPA2277UAG4 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:
- 2
- 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:
- 790µA (x2 Channels)
- 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:
- 8-SOIC
OPA2277UAG4 FAQ
1.How can I place an order for OPA2277UAG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2277UAG4 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 OPA2277UAG4 reliable?
The price and inventory of OPA2277UAG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2277UAG4 is usually 5 days.
3.What payment methods are accepted for OPA2277UAG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2277UAG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2277UAG4?
OPA2277UAG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2277UAG4 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 OPA2277UAG4?
For technical support, including OPA2277UAG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2277UAG4 requirements.
6.How does Aetrix verify that OPA2277UAG4 is sourced from the original manufacturer or authorized distributors?
All OPA2277UAG4 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 OPA2277UAG4 meets industry standards.
7.What is the process for return or replacement of OPA2277UAG4?
All OPA2277UAG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2277UAG4, 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 OPA2277UAG4 part is unused and in its original packaging.
Return procedure for OPA2277UAG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2277UAG4 Tags
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