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Texas Instruments OPA2277AIDRMT
- Part No.:
- OPA2277AIDRMT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
OPA2277AIDRMT.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,722
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Product details
Overview
OPA2277AIDRMT from Texas Instruments is a dual high-precision operational amplifier optimized for low-drift, low-noise DC-coupled signal conditioning in industrial measurement systems. It delivers 10 µV max input offset voltage, ±0.1 µV/°C drift, 134 dB open-loop gain, and 140 dB common-mode rejection across ±2 V to ±18 V supplies - enabling accurate weigh scale and temperature transmitter front-ends without trimming.
For engineers reviewing the OPA2277AIDRMT datasheet, OPA2277AIDRMT pinout, OPA2277AIDRMT application, or OPA2277AIDRMT equivalent, this page provides verified pin functions, real-world thermal performance (RθJA = 39.3°C/W in VSON), channel separation data, and two validated alternative op amps with documented parameter differences.
Technical Context
The OPA2277AIDRMT uses laser-trimmed bipolar input circuitry with internal bias current cancellation, eliminating need for external compensation resistors. Its unity-gain stability, absence of phase inversion, and rail-to-rail output swing (±1.5 V from rails at 2 kΩ load) support robust operation in precision sensor interfaces.
It features integrated 1-kΩ series input resistors and diode clamps enabling ±30-V differential input tolerance, while maintaining 0.22 µVPP (0.1–10 Hz) input noise and 0.8 V/µs slew rate - balancing speed, accuracy, and ruggedness for analog input modules and DAQ systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±10 µV (max @ 25°C); enables <1 LSB error in 18-bit ADC systems without calibration |
| Offset Drift | ±0.1 µV/°C (max); ensures <1 µV total drift over 0–70°C ambient range |
| Open-Loop Gain | 134 dB (min); supports >100 ppm closed-loop accuracy in high-gain transducer amplifiers |
| CMRR | 140 dB (min); rejects >100 dB of common-mode interference in bridge sensor circuits |
| Supply Range | ±2 V to ±18 V; operates unchanged across industrial 12 V and 24 V dual-rail systems |
| Quiescent Current | 800 µA per amplifier; allows dual-channel precision amplification within 1.6 mA total budget |
| 0.1–10 Hz Noise | 0.22 µVPP; meets sub-10 µVPP noise floor requirements for strain gauge and RTD signal chains |
Pinout & Package
OPA2277AIDRMT is housed in an 8-pin VSON (DRM) package measuring 4.00 mm × 4.00 mm with exposed thermal pad connected to V−. This thermally enhanced leadless package achieves RθJA = 39.3°C/W - critical for stable DC performance in compact industrial enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Out A | Output channel A | Low-impedance buffered output; drives 2 kΩ loads to within ±1.5 V of rails |
| 2 - −In A | Inverting input channel A | Differential input node; accepts signals referenced to system ground or virtual ground |
| 3 - +In A | Noninverting input channel A | High-impedance input (250 GΩ || 3 pF); minimizes loading on high-Z sensors |
| 4 - V− | Negative supply | Reference for internal biasing; thermal pad must be soldered to PCB ground plane |
| 5 - +In B | Noninverting input channel B | Independent input for second signal path; no crosstalk (<0.1 µV/V) with channel A |
| 6 - −In B | Inverting input channel B | Matched to channel A inputs; supports dual-sensor differential acquisition |
| 7 - V+ | Positive supply | Primary power rail; decoupling capacitor required within 5 mm of pin |
| 8 - Out B | Output channel B | Fully independent output; maintains specified AC/DC performance under overload |
Key Features
| Feature | Design Value |
|---|---|
| Laser-trimmed offset & drift | Eliminates manual nulling in production; reduces test time and calibration cost |
| Internal bias current cancellation | Removes need for external Rcomp, avoiding added noise and offset errors |
| ±30-V differential input tolerance | Withstands transient overvoltage in field-installed instrumentation without protection circuitry |
| Unity-gain stable, no phase reversal | Enables direct use in follower, integrator, and active filter topologies without stability analysis |
| Channel independence | 0.1 µV/V dc channel separation prevents cross-talk in dual-channel DAQ and sensor redundancy |
Applications
| Weigh Scale Front-End | Temperature Transmitter |
|---|---|
Use Scenario: Amplifies mV-level output from load cell bridges in factory-floor weighing systems with 0.01% linearity requirement. IC Role / Device Role / Timing Role: Dual-channel precision instrumentation amplifier core - one channel for signal, one for reference or diagnostics. Use Value: 10 µV offset and 0.1 µV/°C drift ensure ≤0.005% full-scale error over 0–50°C ambient, meeting OIML R76 Class III accuracy. |
Use Scenario: Conditions PT100/RTD signals in 4–20 mA loop-powered transmitters deployed in HVAC and process control. IC Role / Device Role / Timing Role: Low-power, high-CMRR front-end amplifier driving 24-bit ΣΔ ADC with ratiometric reference. Use Value: 140 dB CMRR rejects common-mode noise from shared 24 V loop supply; 800 µA per amp enables full functionality within 3.5 mA loop budget. |
| Analog Input Module | Data Acquisition System |
Use Scenario: 16-channel isolated analog input card for PLCs accepting ±10 V, 0–20 mA, and thermocouple inputs. IC Role / Device Role / Timing Role: Precision buffer and level-shifter for multiplexed sensor signals prior to ADC sampling. Use Value: 0.22 µVPP (0.1–10 Hz) noise preserves resolution in 24-bit measurements; SOIC/VSON options support both through-hole and space-constrained layouts. |
Use Scenario: High-accuracy benchtop DAQ capturing slow-varying physical parameters (pressure, strain, humidity) at 10 SPS. IC Role / Device Role / Timing Role: Dual-channel programmable-gain amplifier (PGA) stage with matched gain paths. Use Value: Matched channel specs (gain error <0.001%, drift <0.05 ppm/°C) enable true differential measurements without software correction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDR | Lower 0.1–10 Hz noise (0.1 µVPP), higher quiescent current (1.3 mA), no input overvoltage protection | Better for ultra-low-noise lab instruments; unsuitable for field-deployed equipment with ESD/lightning risk | Select when noise dominates error budget and supply headroom permits higher IQ |
| AD8676ARMZ | Higher offset drift (±0.2 µV/°C), lower CMRR (120 dB), same SOIC-8 footprint but not pin-compatible | Acceptable for commercial-grade DAQ where cost is constrained and ambient temp range is limited | Choose only if redesigning PCB layout; requires new routing and validation due to different pinout |
Compared with OPA2277AIDRMT, OPA2189IDR trades higher power for lower noise in controlled environments, while AD8676ARMZ offers cost advantage at the expense of drift and CMRR - neither is pin-compatible, requiring layout revision for either replacement.
Availability
OPA2277AIDRMT is available at Aetrix Electronics and suitable for weigh scale front-ends, temperature transmitters, and analog input modules requiring stable component supply across extended product lifecycles and industrial temperature ranges.
Supply support for OPA2277AIDRMT 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 op amp innovation and automotive/industrial qualification expertise.
The OPAx277 product line was designed specifically for high-stability DC signal conditioning in industrial process control, test equipment, and sensor interface applications where long-term accuracy and thermal robustness are mandatory.
FAQ
What is the maximum operating supply voltage for OPA2277AIDRMT?
The OPA2277AIDRMT supports dual supplies from ±2 V to ±18 V, corresponding to a total supply range of 4 V to 36 V. Absolute maximum rating is 36 V across V+ and V−, with recommended operation up to ±15 V for guaranteed specification compliance over temperature. Exceeding ±18 V risks permanent damage per absolute maximum ratings.
Does OPA2277AIDRMT require external offset trim components?
No, OPA2277AIDRMT does not include offset trim pins and is fully laser-trimmed at wafer test. Unlike the single-channel OPA277 (which has pins 1 and 8 for trimming), the dual OPA2277 variants - including OPA2277AIDRMT - rely solely on factory calibration. External trimming is neither supported nor necessary for achieving datasheet performance.
What is the thermal resistance (RθJA) of OPA2277AIDRMT in its VSON package?
The OPA2277AIDRMT in the DRM (8-pin VSON) package has a junction-to-ambient thermal resistance (RθJA) of 39.3°C/W under standard JEDEC JESD51-7 conditions. This value assumes proper PCB layout with thermal pad soldered to ≥1 in² copper area - actual board-level RθJA may vary by ±15% depending on copper coverage and airflow.
Can OPA2277AIDRMT drive capacitive loads without instability?
OPA2277AIDRMT is unity-gain stable but exhibits increasing overshoot with capacitive loads: typical small-signal overshoot is <5% at 100 pF, rising to ~30% at 1500 pF (gain = 1). For loads >500 pF, TI recommends isolating with a series resistor (e.g., 10–50 Ω) between output and capacitance to maintain phase margin and settling behavior.
How does OPA2277AIDRMT handle input overvoltage conditions?
OPA2277AIDRMT incorporates 1-kΩ series input resistors and diode clamps on both inputs, allowing it to withstand ±30-V differential input voltage without damage. During overvoltage, clamping diodes conduct - which may affect slewing in unity-gain followers - but the device remains functional and recovers fully once normal operation resumes.
OPA2277AIDRMT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 35 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:
- 8-VSON (4x4)
OPA2277AIDRMT FAQ
1.How can I place an order for OPA2277AIDRMT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2277AIDRMT 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 OPA2277AIDRMT reliable?
The price and inventory of OPA2277AIDRMT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2277AIDRMT is usually 5 days.
3.What payment methods are accepted for OPA2277AIDRMT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2277AIDRMT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2277AIDRMT?
OPA2277AIDRMT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2277AIDRMT 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 OPA2277AIDRMT?
For technical support, including OPA2277AIDRMT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2277AIDRMT requirements.
6.How does Aetrix verify that OPA2277AIDRMT is sourced from the original manufacturer or authorized distributors?
All OPA2277AIDRMT 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 OPA2277AIDRMT meets industry standards.
7.What is the process for return or replacement of OPA2277AIDRMT?
All OPA2277AIDRMT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2277AIDRMT, 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 OPA2277AIDRMT part is unused and in its original packaging.
Return procedure for OPA2277AIDRMT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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