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Texas Instruments OPA4277PA
- Part No.:
- OPA4277PA
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
OPA4277PA.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,434
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Product details
Overview
OPA4277PA from Texas Instruments is a quad high-precision operational amplifier designed for low-drift, low-noise signal conditioning in industrial measurement systems. It delivers ultra-low offset voltage (±20 µV max), ultra-low drift (±0.15 µV/°C max), 134 dB open-loop gain, 140 dB CMRR, and operates from ±2 V to ±18 V supplies - enabling stable performance in weigh scales and temperature transmitters.
For engineers reviewing the OPA4277PA datasheet, OPA4277PA pinout, OPA4277PA application, or OPA4277PA equivalent, key selection criteria include input offset stability over temperature, channel-to-channel crosstalk suppression in multi-channel DAQ, output swing near rails under 2-kΩ load, and compatibility with ±15-V legacy sensor front-ends.
Technical Context
The OPA4277PA employs laser-trimmed thin-film resistor networks and a precision bipolar input stage to achieve sub-µV/°C drift and <0.22 µVPP 0.1–10 Hz noise. Its fully independent quad architecture ensures no interaction between channels even under overload, with >115 dB channel separation up to 100 kHz.
It features internal input protection (±30-V differential tolerance), bias current cancellation eliminating external compensation resistors, and unity-gain stability without phase reversal - supporting direct use in precision integrators, strain gauge amplifiers, and 4–20 mA transmitter loops without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset voltage | ±20 µV max at 25°C; eliminates need for manual nulling in most bridge sensor interfaces |
| Drift | ±0.15 µV/°C max (–40°C to +85°C); ensures <±1.5 µV total drift across industrial temp range |
| CMRR | 140 dB min; rejects common-mode interference from noisy PLC backplanes or motor drives |
| Open-loop gain | 134 dB typ; enables <0.001% gain error in 100× instrumentation amplifier configurations |
| Quiescent current | 825 µA per amplifier max; supports low-power battery-operated DAQ with four simultaneous channels |
| Supply range | ±2 V to ±18 V; interoperable with legacy ±15-V analog I/O modules and modern ±5-V systems |
| Output swing | (V–) + 1.5 V to (V+) – 1.5 V @ 2 kΩ; delivers full 28-V p-p swing on ±15-V rails for maximum dynamic range |
Pinout & Package
OPA4277PA is packaged in a 14-pin SOIC (D package), 3.91 mm × 8.65 mm body, with standard JEDEC outline and gull-wing leads. Thermal resistance RθJA = 86.5°C/W enables operation at full spec without forced air in ambient temperatures ≤70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Out A | Amplifier A output; rail-to-rail capable within specified load and supply constraints |
| 2 | –In A | Inverting input for channel A; matched impedance and layout-critical for common-mode rejection |
| 3 | +In A | Noninverting input for channel A; thermally symmetric routing required to minimize thermal EMF errors |
| 4 | V+ | Positive supply rail; requires local 0.1-µF ceramic decoupling to ground per amplifier section |
| 5 | +In B | Noninverting input for channel B; electrically isolated from other channels to prevent crosstalk |
| 6 | –In B | Inverting input for channel B; identical electrical characteristics to pin 2 |
| 7 | Out B | Amplifier B output; independent output stage prevents loading effects on adjacent channels |
| 8 | Out C | Amplifier C output; supports simultaneous 3-channel analog acquisition without inter-channel gain error |
| 9 | –In C | Inverting input for channel C; pin 9 location minimizes trace length matching to pin 10 |
| 10 | +In C | Noninverting input for channel C; symmetrical placement relative to pins 2/3 and 5/6 |
| 11 | V– | Negative supply rail; connects to system ground or negative rail; shared return for all four amplifiers |
| 12 | +In D | Noninverting input for channel D; enables 4-channel synchronous sampling in compact layout |
| 13 | –In D | Inverting input for channel D; matches pin 2/6/9 in parasitic capacitance and layout sensitivity |
| 14 | Out D | Amplifier D output; fully specified for settling time (16 µs to 0.01%) and overload recovery (3 µs) |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed offset & drift | Eliminates factory calibration and reduces post-assembly drift-induced recalibration cycles in field instruments |
| Independent quad topology | Prevents channel interaction during overload or saturation - critical for multi-sensor data loggers |
| Bias current cancellation | Removes need for external Rcomp, avoiding added noise and offset error in high-Z pH or thermocouple circuits |
| Input overvoltage protection | Withstands ±30-V differential input without damage - protects against wiring faults in industrial cabinets |
| EMI rejection (EMIRR IN+) | High RF immunity at noninverting input prevents offset shifts from 800-MHz cellular or 2.4-GHz Wi-Fi emissions |
Applications
| Weigh Scale Front-End | Temperature Transmitter |
|---|---|
Use Scenario: Amplifies mV-level output from 350-Ω strain gauge bridges in platform scales and hopper load cells. IC Role / Device Role / Timing Role: Precision DC-coupled instrumentation amplifier core with 100× gain and <1 µV/°C total error budget. Use Value: Enables 1:10,000 resolution (0.01% FS) over –10°C to +50°C ambient without auto-zero or chopper architecture. | Use Scenario: Conditions RTD (PT100/1000) or thermistor signals in 4–20 mA loop-powered transmitters. IC Role / Device Role / Timing Role: Low-drift, low-noise programmable-gain amplifier driving voltage-to-current converter. Use Value: Achieves <0.1°C accuracy over –40°C to +85°C with no external offset trim or temperature compensation circuitry. |
| Pressure Transmitter Signal Chain | Data Acquisition System Input Stage |
Use Scenario: Interfaces piezoresistive pressure sensors with 1–10 mV/V sensitivity in HVAC and process control. IC Role / Device Role / Timing Role: First-stage gain block with high CMRR to reject common-mode noise from solenoid valves and pumps. Use Value: Maintains >120 dB CMRR at 60 Hz despite 10-V common-mode transients, reducing post-processing filtering requirements. | Use Scenario: Simultaneous analog input conditioning for 4-channel 16-bit SAR ADC in portable test equipment. IC Role / Device Role / Timing Role: Quad buffer and level-shifter providing matched gain, offset, and bandwidth to each ADC channel. Use Value: Ensures <0.02% inter-channel gain match and <100-ps skew between channels for coherent multi-signal capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4188AIDR | Zero-drift auto-zero architecture; 0.005 µV/°C drift vs. OPA4277PA's ±0.15 µV/°C; higher 1/f noise (0.3 µVPP) | Better for DC-coupled microvolt-level measurements; less suitable for wideband sensor excitation | Select OPA4188AIDR when long-term zero stability dominates over wideband noise and settling time |
| AD8629ARUZ | Single-supply optimized (2.7–36 V); lower quiescent current (250 µA); CMRR 130 dB (vs. 140 dB) | Preferred for battery-powered handheld DAQ; reduced supply headroom margin for ±15-V systems | Choose AD8629ARUZ only when operating from single-ended supplies or where ultra-low IQ outweighs CMRR and drift specs |
Compared with OPA4277PA, OPA4188AIDR offers superior drift but trades off 0.1–10 Hz noise and settling time; AD8629ARUZ provides wider supply flexibility at the cost of CMRR and thermal stability - making OPA4277PA optimal for dual-supply industrial transmitters requiring guaranteed 140 dB rejection and ±0.15 µV/°C drift.
Availability
OPA4277PA is available at Aetrix Electronics and suitable for weigh scale manufacturing, temperature transmitter design, and industrial data acquisition systems requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA4277PA 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 for industrial, automotive, and communications markets.
The OPAx277 product line was engineered specifically for high-accuracy, low-drift analog signal conditioning in industrial process control, test equipment, and sensor interface applications - replacing legacy OP-177 with improved speed, noise, and power efficiency.
FAQ
What is the maximum allowable supply voltage for OPA4277PA?
The absolute maximum supply voltage for OPA4277PA is ±18 V (36 V total), with recommended operation from ±2 V to ±15 V. Operation at ±18 V is permitted but may reduce long-term reliability; TI specifies full performance across ±5 V to ±15 V, and OPA4277PA maintains 134 dB open-loop gain and 140 dB CMRR within this range.
Does OPA4277PA require external offset trim components?
No - OPA4277PA does not provide external offset trim pins. Unlike the single-channel OPA277 (which has pins 1 and 8 for trimming), the quad OPA4277PA is laser-trimmed at wafer level and specified with ±20 µV max offset at 25°C and ±100 µV max over –40°C to +85°C, eliminating need for user adjustment in typical applications.
How does OPA4277PA handle input overvoltage conditions?
OPA4277PA incorporates 1-kΩ series input resistors and diode clamps on both inputs, allowing it to withstand ±30-V differential input without damage. This protects against wiring errors or transient surges in industrial cabinets, though sustained overvoltage may affect accuracy until thermal equilibrium is restored.
Can OPA4277PA drive capacitive loads directly?
OPA4277PA is unity-gain stable and can drive up to 1500 pF capacitive load with controlled overshoot (<10%), as verified in Figure 6-19 of the datasheet. For loads >1500 pF, an isolation resistor (e.g., 10–50 Ω) between amplifier output and capacitor is recommended to maintain stability and settling performance.
What is the typical 0.1–10 Hz noise performance of OPA4277PA?
OPA4277PA delivers 0.22 µVPP typical input-referred noise in the 0.1–10 Hz band, measured with bandwidth limiting. This low flicker noise supports high-resolution DC measurements in weigh scales and precision thermometry where sub-microvolt stability is required over seconds-to-minutes timescales.
OPA4277PA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- Through Hole
- Supplier Device Package:
- 14-PDIP
OPA4277PA FAQ
1.How can I place an order for OPA4277PA through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4277PA 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 OPA4277PA reliable?
The price and inventory of OPA4277PA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4277PA is usually 5 days.
3.What payment methods are accepted for OPA4277PA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4277PA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4277PA?
OPA4277PA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4277PA 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 OPA4277PA?
For technical support, including OPA4277PA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4277PA requirements.
6.How does Aetrix verify that OPA4277PA is sourced from the original manufacturer or authorized distributors?
All OPA4277PA 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 OPA4277PA meets industry standards.
7.What is the process for return or replacement of OPA4277PA?
All OPA4277PA units undergo pre-shipment inspection (PSI). If there is an issue with OPA4277PA, 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 OPA4277PA part is unused and in its original packaging.
Return procedure for OPA4277PA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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