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Texas Instruments OPA211AIDRGR
- Part No.:
- OPA211AIDRGR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
OPA211AIDRGR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:2,020
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Product details
Overview
OPA211AIDRGR from Texas Instruments is a dual-channel, precision operational amplifier with 1.1 nV/√Hz input voltage noise density at 1 kHz, 80 MHz gain-bandwidth product (G = 100), 27 V/μs slew rate, and rail-to-rail output swing - designed for high-fidelity signal conditioning in 16-bit data acquisition systems driving ADCs or buffering DACs.
For engineers reviewing the OPA211AIDRGR datasheet, OPA211AIDRGR pinout, OPA211AIDRGR application, or OPA211AIDRGR equivalent, this page delivers verified specifications, SON-8 package layout, real-world use cases in instrumentation and test equipment, and validated alternative parts with documented functional trade-offs.
Technical Context
The OPA211AIDRGR implements a fully differential, unity-gain stable architecture optimized for low-noise, high-speed precision applications. Its internal design supports simultaneous low 1.1 nV/√Hz voltage noise and 1.7 pA/√Hz current noise at 1 kHz, enabling wideband signal integrity in PLL loop filters and sensor front-ends.
It features an active shutdown pin (Pin 8) with defined enable/disable thresholds relative to V+, rail-to-rail output capable of ±0.2 V swing from rails under 10 kΩ load, and specified operation from –40°C to +125°C across ±2.25 V to ±18 V dual supplies or 4.5 V to 36 V single supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Noise Density | 1.1 nV/√Hz at 1 kHz - enables sub-μV resolution in low-level sensor amplification without dominating system noise floor |
| Gain-Bandwidth Product | 80 MHz at G = 100 - supports stable closed-loop operation up to 800 kHz with 100× gain for anti-aliasing filter stages |
| Slew Rate | 27 V/μs - ensures faithful reproduction of fast transients in radar pulse conditioning and ultrasound transmit/receive paths |
| 16-Bit Settling Time | 700 ns over 10-V output swing - guarantees full accuracy for high-speed SAR or sigma-delta ADC drivers in DAQ systems |
| Input Offset Voltage | ±125 μV max - maintains DC accuracy in precision current sensing and strain gauge bridges without trimming |
| Supply Range | ±2.25 V to ±18 V or 4.5 V to 36 V - accommodates industrial power rails and battery-powered portable instrumentation |
| Quiescent Current | 3.6 mA per channel typical - balances ultra-low noise performance with moderate power budget in multi-channel systems |
Pinout & Package
OPA211AIDRGR is packaged in an 8-pin SON (Small Outline No-lead) with 3.00 mm × 3.00 mm body size and exposed thermal pad on underside. Thermal pad must be soldered to PCB and connected to V– for specified thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | High-impedance (10 GΩ || 2 pF) node for differential signal reference; common-mode range extends to within 1.4 V of rails |
| –IN A (Pin 2) | Inverting input, Channel A | Differential pair input with matched bias current; used for feedback configuration and transimpedance gain setting |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail capable output delivering ±30 mA short-circuit current; drives 10 kΩ loads to within ±0.2 V of supply rails |
| V– (Pin 4) | Negative power supply | Reference for internal biasing and thermal pad connection point; required for optimal thermal dissipation and PSRR |
| +IN B (Pin 5) | Noninverting input, Channel B | Independent high-Z input identical to Channel A; enables dual-path signal processing without cross-talk |
| –IN B (Pin 6) | Inverting input, Channel B | Separate differential input for second channel; supports independent gain and filtering configurations |
| OUT B (Pin 7) | Output, Channel B | Second rail-to-rail output with identical AC/DC specs as OUT A; allows parallel or complementary signal paths |
| V+ (Pin 8) | Positive power supply | Primary supply rail; shutdown threshold referenced to this pin; requires local decoupling for high-frequency stability |
Key Features
| Feature | Design Value |
|---|---|
| 1.1-nV/√Hz input voltage noise | Enables detection of microvolt-level signals in seismic sensors and photodiode transimpedance amplifiers without external cooling |
| Rail-to-rail output swing | Maximizes dynamic range in single-supply systems (e.g., 5 V or 12 V instrumentation), preserving >99% of available voltage headroom |
| 700-ns 16-bit settling time | Supports ≥1.4 MSPS sampling in precision DAQ systems using 16-bit ADCs without post-acquisition correction |
| Active shutdown mode | Reduces quiescent current to ≤20 μA per channel while maintaining high-impedance output state for multiplexed analog signal chains |
| ±0.35 μV/°C offset drift | Ensures <10 μV total drift over –40°C to +125°C - critical for uncalibrated field-deployed test equipment and aerospace avionics |
Applications
| Ultrasound Scanner Front-End | Semiconductor Test Equipment |
|---|---|
Use Scenario: Amplifying weak echo signals from piezoelectric transducers after time-gain compensation (TGC). IC Role / Device Role / Timing Role: Low-noise preamplifier stage with programmable gain and bandwidth control. Use Value: 1.1 nV/√Hz noise density preserves SNR in 1–15 MHz receive bands; 27 V/μs slew rate handles fast TGC step transitions without distortion. |
Use Scenario: Precision voltage/current sourcing and measurement in automated test equipment (ATE) for IC characterization. IC Role / Device Role / Timing Role: Output buffer and feedback amplifier in SMU (Source Measurement Unit) force-sense loops. Use Value: ±125 μV max offset and 0.35 μV/°C drift ensure <0.01% accuracy over temperature; rail-to-rail output supports 0–10 V compliance ranges. |
| X-Ray Detector Signal Chain | Lab Instrumentation DAQ |
Use Scenario: Integrating and amplifying charge pulses from scintillator-photodiode assemblies in digital radiography. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) followed by programmable gain stage. Use Value: 1.7 pA/√Hz input current noise minimizes shot-noise contribution; 80 MHz GBW supports fast pulse shaping (<100 ns rise time). |
Use Scenario: Driving 16-bit SAR ADC inputs in benchtop multimeters, spectrum analyzers, and oscilloscope front-ends. IC Role / Device Role / Timing Role: High-fidelity buffer and driver with minimal settling error and THD+N of –136 dB. Use Value: 700 ns 16-bit settling guarantees full accuracy at 1.4 MSPS; low THD+N prevents harmonic contamination in spectral analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA211AIDGKR | Same silicon die, VSSOP-8 package (3.0 mm × 3.0 mm); 184.9°C/W θJA vs 125°C/W for DRG; no exposed thermal pad | Limited thermal performance in high-power-density layouts; unsuitable for sustained >10 mA output current at elevated ambient temperatures | Select when board space constraints favor VSSOP footprint and thermal load remains below 150 mW per channel |
| OPA2211AIDRGR | Dual-channel variant with identical noise, speed, and precision specs but different pinout: OUT A/OUT B swapped; no shutdown pin | Cannot implement power-gating in battery-operated systems; requires PCB redesign due to non-interchangeable pin mapping | Choose only when shutdown functionality is unnecessary and layout allows reassignment of output pins |
Compared with OPA211AIDRGR, the OPA211AIDGKR trades thermal efficiency for package compatibility with legacy VSSOP footprints, while the OPA2211AIDRGR removes shutdown capability to simplify routing - neither offers pin-to-pin replacement, requiring schematic and layout revision for integration.
Availability
OPA211AIDRGR is available at Aetrix Electronics and suitable for ultrasound scanner front-ends, semiconductor test equipment, and lab-grade data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.
Supply support for OPA211AIDRGR 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 90 years of innovation in precision signal chain components.
The OPA211AIDRGR belongs to TI's OPAx211 precision op-amp family, engineered specifically for high-resolution data acquisition, test and measurement, and medical imaging systems where ultra-low noise and fast settling are non-negotiable.
FAQ
What is the maximum operating temperature range for the OPA211AIDRGR?
The OPA211AIDRGR is specified from –40°C to +125°C ambient temperature. This extended industrial temperature range ensures reliable operation in harsh environments such as automotive under-hood modules, industrial PLCs, and outdoor test equipment enclosures without derating.
Does the OPA211AIDRGR support single-supply operation?
Yes, the OPA211AIDRGR supports single-supply operation from 4.5 V to 36 V. Its rail-to-rail output and input common-mode range extending to within 1.4 V of V+ allow full-scale signal handling in 5 V, 12 V, or 24 V systems without level-shifting circuitry.
How does the shutdown function work on the OPA211AIDRGR?
The OPA211AIDRGR uses Pin 8 (Shutdown) as an active-high control. The device enables when VSHUTDOWN ≤ (V+) – 3 V and disables when VSHUTDOWN ≥ (V+) – 0.35 V. In shutdown, quiescent current drops to ≤20 μA per channel and the output enters high-impedance state.
What is the thermal pad connection requirement for the OPA211AIDRGR SON package?
The exposed thermal pad on the underside of the OPA211AIDRGR's SON package must be soldered to the PCB and electrically connected to V–. This connection is mandatory to achieve the specified 125°C/W junction-to-ambient thermal resistance and prevent thermal runaway during sustained 30 mA output loading.
Can the OPA211AIDRGR drive capacitive loads directly?
The OPA211AIDRGR can drive up to 100 pF capacitive loads while maintaining stability and 0.0015% (16-bit) settling in 700 ns. For loads >100 pF, external isolation resistors (e.g., 10–50 Ω in series with the output) are required to prevent peaking and overshoot per Figure 28 in the datasheet.
OPA211AIDRGR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 27V/µs
- Gain Bandwidth Product:
- 80 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 60 nA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 3.6mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SON (3x3)
OPA211AIDRGR FAQ
1.How can I place an order for OPA211AIDRGR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA211AIDRGR 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 OPA211AIDRGR reliable?
The price and inventory of OPA211AIDRGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA211AIDRGR is usually 5 days.
3.What payment methods are accepted for OPA211AIDRGR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA211AIDRGR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA211AIDRGR?
OPA211AIDRGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA211AIDRGR 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 OPA211AIDRGR?
For technical support, including OPA211AIDRGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA211AIDRGR requirements.
6.How does Aetrix verify that OPA211AIDRGR is sourced from the original manufacturer or authorized distributors?
All OPA211AIDRGR 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 OPA211AIDRGR meets industry standards.
7.What is the process for return or replacement of OPA211AIDRGR?
All OPA211AIDRGR units undergo pre-shipment inspection (PSI). If there is an issue with OPA211AIDRGR, 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 OPA211AIDRGR part is unused and in its original packaging.
Return procedure for OPA211AIDRGR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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