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Texas Instruments OPA211AIDG4
- Part No.:
- OPA211AIDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA211AIDG4.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,548
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Product details
Overview
OPA211AIDG4 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), and rail-to-rail output swing. It operates from ±2.25 V to ±18 V supplies, delivers 30 mA output current, and achieves 16-bit settling in 700 ns-making it ideal for high-resolution data acquisition driving 16-bit ADCs.
For engineers reviewing the OPA211AIDG4 datasheet, OPA211AIDG4 pinout, OPA211AIDG4 application, or OPA211AIDG4 equivalent, key selection criteria include ultra-low noise performance, fast settling time, low offset drift (0.35 μV/°C), shutdown functionality, and compatibility with precision instrumentation, PLL loop filters, and semiconductor test systems.
Technical Context
The OPA211AIDG4 implements a fully differential input stage optimized for low voltage noise and high open-loop gain (≥114 dB), supporting stable operation at unity gain and high closed-loop gains up to G = 100. Its internal architecture includes matched transistor pairs for low offset drift and integrated shutdown control with sub-μs turn-on/turn-off times.
It features rail-to-rail output swing with ±0.2 V headroom at 10 kΩ load and maintains THD+N of –136 dB at 1 kHz (G = 1), enabling high-fidelity signal conditioning in DC-coupled precision measurement paths and wide-dynamic-range analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Noise Density | 1.1 nV/√Hz at 1 kHz - enables detection of microvolt-level signals in low-amplitude sensor interfaces |
| Gain-Bandwidth Product | 80 MHz at G = 100 - supports high-speed closed-loop filtering in PLL applications |
| Settling Time | 700 ns to 16-bit accuracy (±1/2 LSB) - ensures full resolution capture in high-speed DAQ systems |
| Offset Voltage Drift | 0.35 μV/°C (typical) - minimizes temperature-induced baseline error in lab-grade instrumentation |
| Supply Range | ±2.25 V to ±18 V - accommodates both low-voltage portable and high-voltage industrial supply rails |
| Output Current | ±30 mA - drives heavy loads including 600 Ω cables and multiplexed ADC inputs without external buffers |
| Shutdown Current | 1–20 μA - reduces system power during idle periods in battery-powered test equipment |
Pinout & Package
OPA211AIDG4 is packaged in an 8-pin VSSOP (DGK) package measuring 3.0 mm × 3.0 mm, with exposed thermal pad requiring solder connection to V– for optimal thermal performance and specified electrical behavior.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | High-impedance node (10 GΩ || 2 pF) for precision DC-coupled signal injection |
| –IN A (Pin 2) | Inverting input, Channel A | Differential pair input with matched bias current (±60 nA typ) for low offset error |
| OUT A (Pin 6) | Output, Channel A | Rail-to-rail capable output delivering ±30 mA into 600 Ω while maintaining linearity |
| V– (Pin 4) | Negative supply | Reference for internal biasing and thermal pad connection point for heat dissipation |
| V+ (Pin 7) | Positive supply | Supports up to ±18 V operation; PSRR > 114 dB suppresses supply ripple coupling |
| Shutdown (Pin 8) | Active-high enable control | Logic-compatible input (VSHDN ≥ V+ – 0.35 V disables output to high-Z state) |
| 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 high-SNR amplification of low-level transducer outputs |
| 16-bit settling time | 700 ns to ±1/2 LSB allows direct interface with 1 MSPS+ 16-bit SAR or sigma-delta ADCs |
| Rail-to-rail output | Swings within ±0.2 V of rails at 10 kΩ load, maximizing dynamic range in single-supply DAQ systems |
| Integrated shutdown | Sub-3 μs turn-off time and <20 μA quiescent current support low-power duty-cycled operation |
| High open-loop gain | ≥114 dB ensures <1 ppm gain error in precision gain stages with G ≤ 100 |
Applications
| Ultrasound Scanner Front-End | Semiconductor Test Equipment |
|---|---|
Use Scenario: Amplifying weak echo signals from piezoelectric transducers in time-gain compensation (TGC) stages. IC Role / Device Role / Timing Role: Low-noise preamplifier with 1.1 nV/√Hz noise floor and 80 MHz bandwidth for preserving signal integrity across 1–15 MHz bandwidth. Use Value: Enables detection of sub-millivolt echoes with minimal added noise, improving image contrast resolution. | Use Scenario: Precision voltage/current sourcing and measurement in automated test equipment (ATE) channel cards. IC Role / Device Role / Timing Role: Output buffer and feedback amplifier in programmable voltage sources with <125 μV offset and 0.35 μV/°C drift. Use Value: Maintains calibration stability over temperature and time, reducing recalibration frequency in production test environments. |
| Data Acquisition Systems | Power Analyzer Signal Conditioning |
Use Scenario: Driving 16-bit successive-approximation register (SAR) ADCs in multi-channel industrial DAQ modules. IC Role / Device Role / Timing Role: High-speed, low-distortion driver with 700 ns 16-bit settling and –136 dB THD+N at 1 kHz. Use Value: Eliminates need for external settling-time optimization, simplifying PCB layout and reducing BOM count. | Use Scenario: Isolating and scaling high-accuracy voltage/current measurements in three-phase energy meters and power analyzers. IC Role / Device Role / Timing Role: Precision difference amplifier with 114 dB CMRR and rail-to-rail output for full-scale analog-to-digital conversion. Use Value: Preserves measurement fidelity across wide common-mode ranges (up to ±16.2 V), critical for harmonic distortion 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 |
|---|---|---|---|
| OPA211AIDR | Same silicon, SOIC-8 package (4.9 mm × 3.9 mm); higher RθJA (122.2°C/W vs 125°C/W) | Larger footprint; less suitable for space-constrained portable test gear | Select when board real estate permits and thermal margin is adequate |
| OPA1612AIDR | Lower noise (1.1 nV/√Hz same), but lower GBW (40 MHz), no shutdown pin, and ±2.25 V min supply | Optimized for audio; lacks shutdown and high-Gain BW needed for PLL loop filters | Choose only for audio-grade DC-coupled applications where shutdown and speed are not required |
Compared with OPA211AIDG4, OPA211AIDR offers identical electrical performance in a larger SOIC package, while OPA1612AIDR trades off speed and control features for enhanced audio-specific linearity-neither is pin-compatible, and both require layout changes.
Availability
OPA211AIDG4 is available at Aetrix Electronics and suitable for ultrasound scanner front-ends, semiconductor test equipment, and high-precision data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for OPA211AIDG4 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 specializing in analog and embedded processing technologies, with leadership in precision signal chain solutions.
The OPA211 series was designed for high-fidelity, low-noise signal conditioning in test and measurement, medical imaging, and industrial instrumentation-where nanovolt-level resolution and microsecond settling are mandatory.
FAQ
What is the maximum supply voltage rating for OPA211AIDG4?
The OPA211AIDG4 has an absolute maximum supply voltage (VS = V+ − V−) of 40 V, with recommended operating range from ±2.25 V to ±18 V (or 4.5 V to 36 V single-supply). Exceeding ±18 V risks permanent damage and violates TI's recommended conditions; operation at ±18 V is supported and validated per the datasheet's Electrical Characteristics tables.
Does OPA211AIDG4 support rail-to-rail input common-mode range?
No, OPA211AIDG4 does not support rail-to-rail input. Its common-mode voltage range is (V−) + 1.8 V to (V+) − 1.4 V for supplies ≥ ±5 V. This limitation requires careful level-shifting in single-supply configurations where input signals approach the rails, unlike its rail-to-rail output capability.
How does the shutdown function behave on OPA211AIDG4?
OPA211AIDG4 features an active-high shutdown pin (Pin 8). When driven to ≥ V+ − 0.35 V, the output enters high-impedance state and quiescent current drops to 1–20 μA. Turn-off time is 3 μs; turn-on time is 2 μs. The pin draws ≤1 μA leakage current and must be tied to a defined logic level-floating is not recommended.
Can OPA211AIDG4 drive capacitive loads without oscillation?
Yes, OPA211AIDG4 is unity-gain stable and can drive ≥100 pF loads without external compensation, as verified in Figure 28 (Overshoot vs Capacitive Load) and typical step-response curves. For loads >100 pF, series output resistance (e.g., 10–100 Ω) is recommended to maintain phase margin and prevent peaking.
What is the thermal pad connection requirement for OPA211AIDG4?
The exposed thermal pad on the OPA211AIDG4 VSSOP package must be soldered to the PCB and electrically connected to V−. TI specifies this connection as mandatory-not optional-for achieving rated thermal resistance (RθJB = 104.9°C/W), specified electrical performance, and long-term reliability under continuous operation.
OPA211AIDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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-SOIC
OPA211AIDG4 FAQ
1.How can I place an order for OPA211AIDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA211AIDG4 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 OPA211AIDG4 reliable?
The price and inventory of OPA211AIDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA211AIDG4 is usually 5 days.
3.What payment methods are accepted for OPA211AIDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA211AIDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA211AIDG4?
OPA211AIDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA211AIDG4 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 OPA211AIDG4?
For technical support, including OPA211AIDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA211AIDG4 requirements.
6.How does Aetrix verify that OPA211AIDG4 is sourced from the original manufacturer or authorized distributors?
All OPA211AIDG4 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 OPA211AIDG4 meets industry standards.
7.What is the process for return or replacement of OPA211AIDG4?
All OPA211AIDG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA211AIDG4, 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 OPA211AIDG4 part is unused and in its original packaging.
Return procedure for OPA211AIDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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