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Texas Instruments OPA211IDRGT
- Part No.:
- OPA211IDRGT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
OPA211IDRGT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:855
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Product details
Overview
OPA211IDRGT 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. It operates from ±2.25 V to ±18 V or 4.5 V to 36 V supplies and delivers 16-bit settling in 700 ns-ideal for high-resolution data acquisition driving 16-bit ADCs.
For engineers reviewing the OPA211IDRGT datasheet, OPA211IDRGT pinout, OPA211IDRGT application, or OPA211IDRGT equivalent, key selection considerations include low-noise signal conditioning in ultrasound scanners, semiconductor test equipment, and seismic DAQ systems where 125 μV max offset, 0.35 μV/°C drift, and 3.6 mA/ch quiescent current are critical.
Technical Context
The OPA211IDRGT implements a fully differential, high-speed precision op-amp architecture optimized for low-noise, wide-bandwidth closed-loop operation. Its internal compensation ensures unity-gain stability while supporting gain configurations from G = 1 to G = 100 without external compensation.
It features an active shutdown pin (Pin 8) enabling high-impedance output state with <2 μs turn-on time, and integrates an exposed thermal pad requiring connection to V– for specified thermal performance (RθJB = 28.8 °C/W in DRG package).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Noise Density | 1.1 nV/√Hz at 1 kHz - enables sub-μV signal integrity in precision sensor front-ends |
| Gain-Bandwidth Product | 80 MHz at G = 100 - supports high-speed closed-loop filtering in PLL loop amplifiers |
| Slew Rate | 27 V/μs - ensures faithful reproduction of fast transients in radar pulse conditioning |
| 16-Bit Settling Time | 700 ns over 10-V swing - meets timing budget for 1 MSPS+ SAR ADC drivers |
| Input Offset Voltage | 125 μV (max) - reduces calibration burden in lab instrumentation signal chains |
| Supply Current | 3.6 mA per channel (typ) - balances low-noise performance with power-constrained embedded DAQ |
| Operating Temp Range | –40°C to +125°C - qualified for industrial and automotive under-hood signal conditioning |
Pinout & Package
OPA211IDRGT is housed in an 8-pin SON (DRG) package measuring 3.00 mm × 3.00 mm with an exposed thermal pad on the underside, requiring soldering to PCB and connection to V– for thermal and electrical performance compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | High-impedance node (10 GΩ || 2 pF) accepting precision analog signals with minimal loading |
| –IN A (Pin 2) | Inverting input, Channel A | Differential pair input referenced to feedback network; common-mode range extends to within 1.4 V of rails |
| OUT A (Pin 6) | Output, Channel A | Rail-to-rail capable (V– + 0.2 V to V+ – 0.2 V @ 10 kΩ), drives 30 mA into loads |
| V– (Pin 4) | Negative supply | Reference for internal biasing and thermal pad connection point; must be tied to exposed pad |
| V+ (Pin 7) | Positive supply | Supports up to ±18 V dual or 36 V single supply; PSRR >114 dB minimizes supply ripple coupling |
| Shutdown (Pin 8) | Enable control | Active-high logic input; disables output to high-Z when ≥(V+) – 0.35 V; draws ≤20 μA in shutdown |
| NC (Pins 1, 5) | No internal connection | May be left floating or tied to any voltage between V– and V+; no functional impact |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low voltage noise | 1.1 nV/√Hz at 1 kHz enables detection of microvolt-level signals in seismic and medical imaging front-ends |
| Rail-to-rail output | Delivers full dynamic range across 10-V output swing, maximizing SNR in single-supply DAQ systems |
| 16-bit settling in 700 ns | Meets timing requirements for high-throughput 16-bit SAR ADC drivers without external settling optimization |
| Low offset drift | 0.35 μV/°C (typ) reduces temperature-induced gain error in precision lab instrumentation over wide ambient ranges |
| Shutdown mode | Reduces quiescent current to ≤20 μA per channel, enabling power-gating in battery-operated field instruments |
Applications
| Ultrasound Scanner Signal Chain | Semiconductor Test Equipment |
|---|---|
Use Scenario: Amplifying weak echo signals from piezoelectric transducers after time-gain compensation. IC Role / Device Role / Timing Role: Low-noise preamplifier and variable-gain stage in receive path before ADC sampling. Use Value: 1.1 nV/√Hz noise density preserves signal fidelity across 1–10 MHz bandwidth, directly improving image resolution. | Use Scenario: Precision voltage/current sourcing and measurement in automated test equipment (ATE) for IC parametric testing. IC Role / Device Role / Timing Role: Output buffer and feedback amplifier in programmable voltage source with <100 ppm accuracy. Use Value: 125 μV max offset and 0.35 μV/°C drift minimize calibration frequency and improve test repeatability over temperature. |
| X-ray Detector Front-End | Seismic Data Acquisition |
Use Scenario: Integrating charge pulses from scintillator-photodiode assemblies in CT detector modules. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with low-noise, high-linearity output stage. Use Value: 27 V/μs slew rate and 80 MHz GBW support fast pulse response (<100 ns rise time) required for high-frame-rate imaging. | Use Scenario: Conditioning geophone and accelerometer outputs in multi-channel field recording systems. IC Role / Device Role / Timing Role: Low-drift, low-noise gain stage preceding 24-bit sigma-delta ADCs. Use Value: –40°C to +125°C operating range and 700 ns 16-bit settling ensure reliable performance in uncontrolled outdoor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA211IDBVT | VSSOP-8 package (3.0 × 3.0 mm); identical electrical specs; no exposed thermal pad | Limited thermal dissipation (RθJB = 104.9 °C/W vs. 28.8 °C/W); unsuitable for sustained 30 mA output | Select OPA211IDRGT for thermally demanding, high-output-current applications; choose IDBVT only for space-constrained layouts without thermal stress |
| ADA4898-2ARMZ | Higher noise (1.9 nV/√Hz), higher supply current (10.5 mA/ch), wider GBW (270 MHz), no shutdown pin | Better speed but poorer DC precision; not drop-in due to different pinout and no shutdown functionality | Choose ADA4898-2ARMZ only when bandwidth >100 MHz is mandatory and offset/drift/noise budgets allow trade-offs |
Compared with OPA211IDBVT and ADA4898-2ARMZ, the OPA211IDRGT uniquely combines ultra-low noise, integrated shutdown, and superior thermal performance in a compact SON package-making it optimal for high-channel-count, thermally constrained precision DAQ systems.
Availability
OPA211IDRGT is available at Aetrix Electronics and suitable for ultrasound scanner design, semiconductor test equipment development, and seismic data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for OPA211IDRGT 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions across industrial, automotive, and communications markets.
The OPA211IDRGT belongs to TI's OPAx211 precision op-amp family, engineered specifically for high-fidelity, low-noise signal conditioning in test & measurement, medical imaging, and scientific instrumentation where DC accuracy and AC performance must coexist.
FAQ
What is the maximum supply voltage rating for the OPA211IDRGT?
The OPA211IDRGT supports a total supply voltage (V+ to V–) of up to 40 V, with recommended operating range from ±2.25 V to ±18 V (dual) or 4.5 V to 36 V (single). Absolute maximum ratings specify VS ≤ 40 V; exceeding this risks permanent damage. The OPA211IDRGT must operate within these limits to maintain specified performance and reliability across its –40°C to +125°C temperature range.
Does the OPA211IDRGT require external compensation for unity-gain stability?
No, the OPA211IDRGT is internally compensated and unity-gain stable. It achieves stable operation with closed-loop gains from G = 1 to G = 100 without external capacitors or resistors. This simplifies layout and eliminates tuning effort in applications like active filters or buffer stages-key for rapid prototyping in lab instrumentation using the OPA211IDRGT.
How does the shutdown function behave on the OPA211IDRGT?
The OPA211IDRGT shutdown pin (Pin 8) is active-high: device enables when voltage is ≤(V+) – 3 V, and disables (output goes high-impedance) when ≥(V+) – 0.35 V. Turn-on/off times are 2 μs and 3 μs respectively, and shutdown current drops to ≤20 μA. This behavior allows precise power sequencing in multi-amplifier systems using the OPA211IDRGT.
Can the OPA211IDRGT drive a 600-Ω load while maintaining rail-to-rail output swing?
Yes-the OPA211IDRGT delivers rail-to-rail output swing into 600 Ω loads, with guaranteed voltage range of (V–) + 0.6 V to (V+) – 0.6 V at AOL ≥ 110 dB. It sources/sinks up to ±30 mA, making it suitable for driving legacy test equipment interfaces and audio line drivers where the OPA211IDRGT's low THD+N (–136 dB) preserves signal purity.
What is the thermal pad connection requirement for the OPA211IDRGT DRG package?
The exposed thermal pad on the OPA211IDRGT's SON-8 (DRG) package must be soldered to the PCB and electrically connected to V–. This connection is mandatory-not optional-for achieving specified thermal resistance (RθJB = 28.8 °C/W) and ensuring stable operation at full output current. Failure to connect the pad degrades thermal performance and may cause premature failure in the OPA211IDRGT.
OPA211IDRGT 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:
- 30 mA
- 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)
OPA211IDRGT FAQ
1.How can I place an order for OPA211IDRGT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA211IDRGT 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 OPA211IDRGT reliable?
The price and inventory of OPA211IDRGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA211IDRGT is usually 5 days.
3.What payment methods are accepted for OPA211IDRGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA211IDRGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA211IDRGT?
OPA211IDRGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA211IDRGT 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 OPA211IDRGT?
For technical support, including OPA211IDRGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA211IDRGT requirements.
6.How does Aetrix verify that OPA211IDRGT is sourced from the original manufacturer or authorized distributors?
All OPA211IDRGT 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 OPA211IDRGT meets industry standards.
7.What is the process for return or replacement of OPA211IDRGT?
All OPA211IDRGT units undergo pre-shipment inspection (PSI). If there is an issue with OPA211IDRGT, 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 OPA211IDRGT part is unused and in its original packaging.
Return procedure for OPA211IDRGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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