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Texas Instruments OPA2277AIDRMR
- Part No.:
- OPA2277AIDRMR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
OPA2277AIDRMR.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,739
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Product details
Overview
OPA2277AIDRMR 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 CMRR across ±2 V to ±18 V supplies - enabling accurate weigh scale and temperature transmitter front-ends without trimming.
For engineers reviewing the OPA2277AIDRMR datasheet, OPA2277AIDRMR pinout, OPA2277AIDRMR application, or OPA2277AIDRMR equivalent, this page provides verified pin functions, real-world thermal metrics for SOIC-8, confirmed 0.22 µVPP (0.1–10 Hz) noise performance, and two validated alternatives with documented channel separation and supply rejection trade-offs.
Technical Context
The OPA2277AIDRMR uses laser-trimmed bipolar input circuitry with internal bias current cancellation, eliminating need for external compensation resistors while maintaining ±1 nA max input bias current. Its unity-gain stability and absence of phase inversion support robust operation in precision integrators and sensor interface loops.
Specified over ±5 V to ±15 V with a single limit - unlike most op amps rated at one voltage only - it guarantees consistent 126 dB min open-loop gain and 115 dB min CMRR across that full range, with output swing to within 1.5 V of rails at 2 kΩ load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input offset voltage | ±10 µV (typ), ±25 µV (max) at 25°C - enables sub-0.01% accuracy in 16-bit DAQ front-ends without calibration |
| Offset voltage drift | ±0.1 µV/°C (max) - contributes <0.85 µV error over –40°C to +85°C ambient, critical for unattended field instrumentation |
| Open-loop gain | 134 dB (typ) - ensures <1 ppm gain error in closed-loop configurations with gain ≥100 |
| CMRR | 140 dB (typ), 115 dB (min) - rejects common-mode interference from 4–20 mA transmitters and noisy PLC backplanes |
| Supply range | ±2 V to ±18 V - supports direct interfacing to legacy ±15 V industrial rails and modern ±5 V low-power systems |
| Quiescent current | 800 µA per amplifier - allows dual-channel precision amplification in battery-powered handheld test equipment |
| 0.1–10 Hz noise | 0.22 µVPP - meets resolution requirements for 24-bit sigma-delta ADC drivers in weigh scales |
Pinout & Package
OPA2277AIDRMR is housed in an 8-pin SOIC (D package), 3.91 mm × 4.90 mm body, with exposed thermal pad connected to V– for improved power dissipation in continuous DC output applications.
| 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; internally compensated for bias current - no external resistor needed |
| 3 - +In A | Noninverting input channel A | High-impedance input (250 GΩ || 3 pF); sensitive to thermoelectric EMF - requires matched thermal layout |
| 4 - V– | Negative supply rail | Reference for internal circuitry and thermal pad connection point; must be low-impedance |
| 5 - +In B | Noninverting input channel B | Independent input for second channel; zero crosstalk due to fully isolated die circuitry |
| 6 - –In B | Inverting input channel B | Matched to channel A specs; supports simultaneous dual-sensor conditioning |
| 7 - Out B | Output channel B | Fully independent output; settles in 16 µs to 0.01% for 10-V step (±15 V supply) |
| 8 - V+ | Positive supply rail | Must be decoupled with 0.1 µF ceramic capacitor close to pin; supports EMI rejection up to 1 GHz |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low drift architecture | Laser-trimmed bipolar input stage with ±0.1 µV/°C max drift - eliminates recalibration in lab instrumentation over temperature cycles |
| Input bias current cancellation | ±1 nA max bias current without external compensation - removes need for RB = R1||R2 networks and avoids added offset/noise |
| Real-world supply specification | Single performance limit across ±5 V to ±15 V - simplifies design validation for multi-rail industrial systems |
| EMI rejection ratio (EMIRR) | High immunity to RF rectification on +In pins - prevents offset shifts from 400–900 MHz cellular or ISM band interference |
| Channel independence | 0.1 µV/V dc channel separation - preserves signal integrity when amplifying differential pairs or dual sensors on same die |
Applications
| Analog Input Module | Weigh Scale |
|---|---|
Use Scenario: Signal conditioning for 4–20 mA current loop receivers in PLC analog input cards. IC Role / Device Role / Timing Role: Dual-channel precision amplifier buffering and level-shifting sensor signals before ADC sampling. Use Value: 140 dB CMRR rejects common-mode noise from shared ground returns; 0.22 µVPP noise ensures 18-bit effective resolution. |
Use Scenario: Amplifying mV-level outputs from strain gauge bridges in platform scales and hopper load cells. IC Role / Device Role / Timing Role: Low-drift instrumentation amplifier front-end with matched gain paths for ratiometric bridge excitation. Use Value: ±0.1 µV/°C drift limits temperature-induced zero-error to <10 ppm over operating range - meeting OIML Class III requirements. |
| Temperature Transmitter | Data Acquisition (DAQ) |
Use Scenario: Linearizing and scaling RTD or thermocouple outputs for 4–20 mA or HART-enabled field transmitters. IC Role / Device Role / Timing Role: Precision voltage-to-current converter driver with stable reference buffer and cold-junction compensation interface. Use Value: 134 dB open-loop gain maintains linearity under varying loop impedance; ±10 µV offset enables <0.1°C absolute accuracy at 25°C. |
Use Scenario: Front-end amplification for 16–24-bit delta-sigma ADCs in portable multimeters and benchtop analyzers. IC Role / Device Role / Timing Role: Dual-channel programmable gain amplifier (PGA) core with selectable gain and filtering paths. Use Value: 800 µA per amplifier enables dual-channel operation in battery-powered DAQ; 1 MHz GBW supports anti-aliasing filter implementation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDR | Zero-drift auto-zero architecture; 0.005 µV/°C drift vs. OPA2277AIDRMR's ±0.1 µV/°C; higher 1.3 MHz GBW but 1.3 µVPP (0.1–10 Hz) noise | Better for ultra-stable DC offsets over wide temperature swings; less suitable for low-noise AC-coupled sensor interfaces | Select OPA2189IDR when long-term zero stability dominates over low-frequency noise floor |
| AD8629ARZ | CMOS input; 1 pA max bias current vs. OPA2277AIDRMR's ±1 nA; lower 2.2 V to 36 V supply range; 130 dB CMRR (min) | Ideal for high-impedance pH or ion-selective electrode buffers; lacks bipolar input's inherent EMI immunity | Select AD8629ARZ when interfacing >100 MΩ sources where input bias current directly impacts accuracy |
Compared with OPA2277AIDRMR, OPA2189IDR offers superior drift performance at the cost of higher 0.1–10 Hz noise, while AD8629ARZ provides femtoampere bias current for ultra-high-Z sensors but sacrifices EMI rejection and rail-to-rail output swing capability.
Availability
OPA2277AIDRMR is available at Aetrix Electronics and suitable for analog input modules, weigh scales, and temperature transmitters requiring stable component supply with guaranteed long-term manufacturability and traceable lot history.
Supply support for OPA2277AIDRMR 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 over 50 years of precision op amp innovation and automotive-grade reliability validation.
The OPAx277 product line was designed specifically for high-accuracy industrial process control and test equipment - replacing OP-177 with improved noise, speed, and quiescent current while maintaining pin compatibility and legacy system interoperability.
FAQ
What is the maximum supply voltage for OPA2277AIDRMR?
The OPA2277AIDRMR supports dual supplies from ±2 V to ±18 V, with absolute maximum rating of ±18 V. Exceeding ±18 V risks permanent damage per Section 6.1 of the datasheet. Operation at ±15 V is typical for industrial systems, delivering optimal balance of output swing, noise, and power consumption in the OPA2277AIDRMR.
Does OPA2277AIDRMR require external offset trim?
No - the OPA2277AIDRMR is laser-trimmed during manufacturing and does not include offset trim pins. Only the single-channel OPA277 has trim pins (pins 1 and 8). The OPA2277AIDRMR achieves ±10 µV typical and ±25 µV maximum input offset voltage without user adjustment, making it suitable for calibration-free designs.
What is the thermal resistance (RθJA) of OPA2277AIDRMR in SOIC-8 package?
The junction-to-ambient thermal resistance (RθJA) for OPA2277AIDRMR in the D (SOIC-8) package is 126.9 °C/W, as specified in Section 6.5 of the datasheet. This value assumes standard JEDEC 2S2P board layout; actual thermal performance improves significantly with copper pour and thermal vias under the exposed pad.
Can OPA2277AIDRMR drive capacitive loads?
Yes - the OPA2277AIDRMR is unity-gain stable and can safely drive up to 1500 pF without oscillation, as verified in Figure 6-19 (small-signal overshoot vs. load capacitance). For loads >1500 pF, external isolation resistance (e.g., 10–50 Ω in series with output) is recommended to maintain phase margin in the OPA2277AIDRMR.
How does OPA2277AIDRMR handle input overvoltage conditions?
The OPA2277AIDRMR inputs include 1-kΩ series resistors and diode clamps, allowing survival of ±30 V differential input without damage (Section 7.3.3). However, clamping conduction may distort slewing in unity-gain followers - for robust overvoltage protection beyond ±30 V, external Schottky clamps to rails are advised in the OPA2277AIDRMR design.
OPA2277AIDRMR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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:
- 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)
OPA2277AIDRMR FAQ
1.How can I place an order for OPA2277AIDRMR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2277AIDRMR 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 OPA2277AIDRMR reliable?
The price and inventory of OPA2277AIDRMR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2277AIDRMR is usually 5 days.
3.What payment methods are accepted for OPA2277AIDRMR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2277AIDRMR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2277AIDRMR?
OPA2277AIDRMR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2277AIDRMR 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 OPA2277AIDRMR?
For technical support, including OPA2277AIDRMR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2277AIDRMR requirements.
6.How does Aetrix verify that OPA2277AIDRMR is sourced from the original manufacturer or authorized distributors?
All OPA2277AIDRMR 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 OPA2277AIDRMR meets industry standards.
7.What is the process for return or replacement of OPA2277AIDRMR?
All OPA2277AIDRMR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2277AIDRMR, 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 OPA2277AIDRMR part is unused and in its original packaging.
Return procedure for OPA2277AIDRMR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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