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Texas Instruments OPA2277UAE4
- Part No.:
- OPA2277UAE4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2277UAE4.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,477
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Product details
Overview
OPA2277UAE4 from Texas Instruments is a dual-channel, high-precision operational amplifier designed for low-drift, low-noise signal conditioning in measurement-critical circuits. 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 performance in battery-powered instruments, strain gage amplifiers, and precision integrators.
For engineers reviewing the OPA2277UAE4 datasheet, OPA2277UAE4 pinout, OPA2277UAE4 application, or OPA2277UAE4 equivalent, key selection criteria include ultralow 0.1–10 Hz noise (0.22 µVPP), high CMRR (140 dB), rail-to-rail output swing capability, and dual-channel independence for low crosstalk in multi-sensor systems.
Technical Context
The OPA2277UAE4 employs a laser-trimmed bipolar input stage with internal bias current cancellation, yielding ≤1 nA max input bias current and matched input offset current. Its unity-gain-stable architecture avoids phase inversion and supports robust operation under overload or capacitive load conditions up to 1500 pF.
Specified over –40°C to +85°C, it maintains consistent performance across ±5 V to ±15 V supply range - unlike many op amps limited to single-voltage characterization. Input common-mode range extends to within 2 V of both rails, and output swings to within 1.5 V of each rail at 2 kΩ load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±10 µV max - enables sub-µV-level DC accuracy without trimming in most precision sensor interfaces |
| Offset Drift | ±0.1 µV/°C max - ensures <1 µV total drift over 85°C temperature span, critical for unattended industrial monitoring |
| Open-Loop Gain | 134 dB min - supports >100 ppm closed-loop accuracy in 100× gain configurations |
| CMRR / PSRR | 140 dB / 130 dB min - rejects >100 dB of power supply ripple and common-mode interference in noisy environments |
| 0.1–10 Hz Noise | 0.22 µVPP - directly supports high-resolution DC measurements in weigh scales and thermopile amplifiers |
| Quiescent Current | 800 µA per amplifier - allows dual-channel precision amplification in 10-year battery-powered field instruments |
| Supply Range | ±2 V to ±18 V - accommodates legacy ±15 V systems and modern low-voltage portable designs without redesign |
Pinout & Package
OPA2277UAE4 is housed in an 8-pin PDIP package (6.35 mm × 9.81 mm body size) with through-hole mounting compatibility and thermal pad connected to V−.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Out A | Output channel A | Low-impedance buffered output capable of ±35 mA short-circuit current and driving ≥2 kΩ loads to within 1.5 V of rails |
| 2 - –In A | Inverting input channel A | Differential input node with 250 GΩ || 3 pF common-mode impedance; protected by 1 kΩ series resistor and diode clamps |
| 3 - +In A | Noninverting input channel A | High-impedance reference input; thermally matched to Pin 2 to minimize thermal EMF-induced offset drift |
| 4 - V− | Negative supply rail | Reference for internal biasing; thermal pad must be soldered to PCB ground plane or V− trace for optimal thermal performance |
| 5 - +In B | Noninverting input channel B | Independent input for second channel; identical electrical specs to Pin 3 - enables dual-sensor synchronous acquisition |
| 6 - –In B | Inverting input channel B | Fully isolated from Channel A circuitry - guarantees <0.1 µV/V channel separation and no interaction during overload |
| 7 - Out B | Output channel B | Separate output stage with same drive strength and settling behavior as Pin 1 - supports independent feedback networks |
| 8 - V+ | Positive supply rail | Primary power connection; requires local 0.1 µF ceramic decoupling to minimize high-frequency PSRR degradation |
Key Features
| Feature | Design Value |
|---|---|
| Ultralow offset voltage trim | Laser-trimmed to ±10 µV (max), eliminating need for external nulling in >95% of precision applications |
| Thermal EMF mitigation | Matched input terminal thermal mass and layout guidance reduce thermocouple-induced drift below 0.05 µV/°C |
| Unity-gain stability | Stable with 0 pF to 1500 pF capacitive loads - simplifies sensor interface design without external compensation |
| Input protection | ±30 V differential input tolerance with 1 kΩ series resistors and diode clamps - prevents damage in transient-prone industrial I/O |
| Channel isolation | 0.1 µV/V DC channel separation - preserves signal integrity in dual transducer systems like 4-wire RTD bridges |
Applications
| Transducer Amplifier | Bridge Amplifier |
|---|---|
Use Scenario: Amplifying mV-level outputs from load cells, pressure sensors, or accelerometers in factory automation systems. IC Role / Device Role / Timing Role: Primary signal-conditioning stage with programmable gain, rejecting common-mode noise from long sensor cables. Use Value: 140 dB CMRR and 0.22 µVPP 0.1–10 Hz noise enable 24-bit effective resolution without external filtering. |
Use Scenario: Reading Wheatstone bridge imbalances in strain gage or torque sensor modules. IC Role / Device Role / Timing Role: Instrumentation-grade differential amplifier with matched input impedances and ultra-low drift. Use Value: ±0.1 µV/°C drift ensures <0.5 µV total offset shift over full operating temperature range, maintaining calibration stability. |
| Temperature Measurement | Battery-Powered Instrument |
Use Scenario: Linearizing and amplifying thermocouple or RTD signals in portable environmental monitors. IC Role / Device Role / Timing Role: Cold-junction compensation amplifier with low thermal EMF inputs and high PSRR. Use Value: Matched input thermal paths and 130 dB PSRR suppress supply ripple and ambient thermal gradients. |
Use Scenario: Signal conditioning in handheld multimeters, pH meters, or portable gas analyzers. IC Role / Device Role / Timing Role: Dual-channel analog front-end supporting simultaneous voltage/current measurement. Use Value: 800 µA per amplifier quiescent current enables >5-year battery life on two AA cells while preserving 10 µV offset accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2188AIDR | Zero-drift auto-zero architecture; 0.003 µV/°C drift vs OPA2277UAE4's ±0.1 µV/°C; higher 1/f noise (0.35 µVPP) | Better for <100°C span DC measurements; less suitable for wide-bandwidth AC-coupled sensor signals due to chopping artifacts | Select OPA2188AIDR when absolute zero-drift dominates over broadband noise; retain OPA2277UAE4 for low-noise, wideband, or EMI-sensitive layouts |
| AD8628ARZ | Chopper-stabilized; 0.002 µV/°C drift; 0.5 µVPP 0.1–10 Hz noise; lower 130 dB CMRR vs OPA2277UAE4's 140 dB | Preferred for ultra-low-drift medical sensors; less ideal for industrial bridge circuits requiring high CMRR in noisy plants | Choose AD8628ARZ for sub-nV/°C drift-critical medical devices; prefer OPA2277UAE4 where CMRR, PSRR, and low 1/f noise jointly define system accuracy |
Compared with OPA2188AIDR and AD8628ARZ, the OPA2277UAE4 offers superior 0.1–10 Hz noise performance and higher CMRR/PSRR - making it the preferred choice for precision DC measurement systems where thermal EMF and power supply rejection are dominant error sources.
Availability
OPA2277UAE4 is available at Aetrix Electronics and suitable for transducer amplifiers, bridge circuits, temperature measurement systems, and battery-powered instruments requiring stable component supply across extended production lifecycles.
Supply support for OPA2277UAE4 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 OPAx277 product line was engineered specifically for high-accuracy DC signal chains - replacing OP-177 with improved noise, wider output swing, and half the quiescent current while maintaining ultralow offset and drift.
FAQ
What is the maximum operating supply voltage for OPA2277UAE4?
The OPA2277UAE4 supports a total supply voltage range of ±2 V to ±18 V (36 V total), with absolute maximum rating of 36 V. It is fully specified for operation from ±5 V to ±15 V, and maintains key parameters such as offset voltage and CMRR across this range - making it suitable for both legacy ±15 V industrial systems and modern low-voltage portable designs.
Does OPA2277UAE4 require external offset trim in typical applications?
No - the OPA2277UAE4 is laser-trimmed to deliver ≤±10 µV input offset voltage (max), eliminating the need for external trimming in >95% of precision applications. External trim pins (Pins 1 and 8) are provided only for specialized use cases demanding sub-µV nulling; TI recommends leaving them floating unless validated drift requirements exceed the device's inherent specification.
How does OPA2277UAE4 handle capacitive loads in sensor interface circuits?
The OPA2277UAE4 is unity-gain stable and characterized to drive capacitive loads up to 1500 pF without oscillation or excessive overshoot. Its robust output stage maintains <1% settling time within 16 µs (0.01% band) even with 1500 pF load and ±15 V supply - enabling direct connection to long cables, piezoelectric sensors, or ADC input filters without external isolation resistors.
What is the 0.1–10 Hz noise performance of OPA2277UAE4, and why does it matter?
The OPA2277UAE4 delivers 0.22 µVPP input-referred noise in the 0.1–10 Hz band - a critical metric for DC and low-frequency measurements. This enables high-resolution weighing, thermocouple amplification, and strain gage readouts where 1/f noise dominates system error budget; it is 2.3× lower than standard precision op amps like OP-07 (0.5 µVPP).
Can OPA2277UAE4 replace OP-07 or OP-177 in existing designs?
Yes - the OPA2277UAE4 is explicitly positioned as a drop-in replacement for OP-07, OP-77, and OP-177, with identical 8-pin PDIP pinout, improved noise (0.22 µVPP vs 0.5 µVPP), wider output swing, twice the bandwidth, and half the quiescent current. No PCB changes are required, and performance improves across all key DC precision parameters including offset, drift, and CMRR.
OPA2277UAE4 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
OPA2277UAE4 FAQ
1.How can I place an order for OPA2277UAE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2277UAE4 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 OPA2277UAE4 reliable?
The price and inventory of OPA2277UAE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2277UAE4 is usually 5 days.
3.What payment methods are accepted for OPA2277UAE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2277UAE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2277UAE4?
OPA2277UAE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2277UAE4 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 OPA2277UAE4?
For technical support, including OPA2277UAE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2277UAE4 requirements.
6.How does Aetrix verify that OPA2277UAE4 is sourced from the original manufacturer or authorized distributors?
All OPA2277UAE4 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 OPA2277UAE4 meets industry standards.
7.What is the process for return or replacement of OPA2277UAE4?
All OPA2277UAE4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2277UAE4, 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 OPA2277UAE4 part is unused and in its original packaging.
Return procedure for OPA2277UAE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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