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Texas Instruments OPA211AIDR
- Part No.:
- OPA211AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA211AIDR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,713
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Product details
Overview
OPA211AIDR from Texas Instruments is a dual-channel, precision operational amplifier optimized for low-noise, high-speed data acquisition systems. It delivers 1.1 nV/√Hz input voltage noise density at 1 kHz, 700 ns 16-bit settling time across 10-V output swing, and rail-to-rail output with ±2.25 V to ±18 V supply range - enabling high-fidelity signal conditioning in precision ADC driver and PLL loop filter applications.
For engineers reviewing the OPA211AIDR datasheet, OPA211AIDR pinout, OPA211AIDR application, or OPA211AIDR equivalent, this page provides verified specifications, package-validated pin functions, real-world application context for lab instrumentation and semiconductor test, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The OPA211AIDR implements a fully differential, unity-gain stable architecture with internal compensation optimized for G ≥ 1 operation. Its low-noise JFET input stage achieves 80 nVPP (0.1–10 Hz) and 1.1 nV/√Hz (1 kHz), while the output stage supports 30 mA drive into 600 Ω with rail-to-rail swing and 27 V/μs slew rate.
It integrates an active shutdown function (pin 8) that reduces quiescent current to ≤20 μA and places the output in high-impedance state. Thermal performance is enhanced by an exposed thermal pad (connected to V–) in its SOIC-8 package, delivering RθJA = 122.2°C/W on high-K board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Noise Density | 1.1 nV/√Hz at 1 kHz - enables sub-16-bit noise floor in precision DAQ front-ends |
| Settling Time (16-bit) | 700 ns for 10-V step - supports ≥1.4 MSPS sampling without settling error |
| Gain Bandwidth Product | 45 MHz at G = 1 - sufficient for closed-loop bandwidth up to ~40 MHz in unity-gain buffers |
| Input Offset Voltage | ±125 μV max - ensures ≤0.0012% gain error in 10-V full-scale measurement |
| Supply Range | ±2.25 V to ±18 V (or 4.5 V to 36 V single-supply) - compatible with industrial and lab-grade power rails |
| Output Drive | 30 mA into 600 Ω - drives coaxial cables and ADC reference buffers without external buffering |
| Shutdown Current | ≤20 μA - enables low-power sleep mode in battery-backed instrumentation |
Pinout & Package
OPA211AIDR is supplied in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm with standard JEDEC MS-012 footprint. The exposed thermal pad is absent in SOIC; thermal management relies on PCB copper area under the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 3) | Noninverting input | High-impedance (10 GΩ || 2 pF) node for precision signal routing; common-mode range extends to within 1.4 V of rails |
| –IN (Pin 2) | Inverting input | Differential pair input; matched to +IN for CMRR ≥114 dB over –40°C to +125°C |
| OUT (Pin 6) | Amplifier output | Rail-to-rail capable; delivers ±0.2 V swing (10 kΩ load) or ±0.6 V (600 Ω load) with ≥110 dB open-loop gain |
| V+ (Pin 7) | Positive supply | Accepts up to +18 V; PSRR = 0.1 μV/V typical - rejects supply ripple in sensitive analog stages |
| V– (Pin 4) | Negative supply | Accepts down to –18 V; connects to thermal pad in SON/VSSOP variants (not applicable to SOIC) |
| Shutdown (Pin 8) | Enable/disable control | Active-high logic; disables output (high-Z) when ≥(V+) – 0.35 V; turn-off time = 3 μs |
| NC (Pins 1, 5) | No connection | Internally unconnected; may be left floating or tied to any voltage between V– and V+ |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low voltage noise | 1.1 nV/√Hz at 1 kHz - preserves SNR in low-level sensor amplification (e.g., piezoelectric, strain gauge) |
| 16-bit settling performance | 700 ns to ±1/2 LSB for 10-V step - eliminates need for post-amplifier digital correction in 16-bit ADC systems |
| Rail-to-rail output | Swings within 0.2 V of rails (10 kΩ) - maximizes dynamic range in single-supply DAQ designs |
| Integrated shutdown | Reduces IQ to ≤20 μA and isolates output - enables power-gating in multi-channel instrument modules |
| Wide supply flexibility | Operates from ±2.25 V to ±18 V or 4.5 V to 36 V - simplifies design reuse across bench, field, and industrial platforms |
Applications
| Ultrasound Signal Conditioning | Semiconductor Test Equipment |
|---|---|
|
Use Scenario: Amplifying low-amplitude echo signals from piezoelectric transducers in portable ultrasound scanners. IC Role / Device Role / Timing Role: Low-noise preamplifier and anti-aliasing filter driver before 16-bit ADC sampling at 40–60 MSPS. Use Value: 1.1 nV/√Hz noise density prevents degradation of weak echo SNR; 700 ns settling ensures accurate digitization of fast transient echoes. |
Use Scenario: Driving DUT bias and sense nodes in automated test equipment (ATE) for IC parametric testing. IC Role / Device Role / Timing Role: Precision voltage/current source follower and feedback amplifier in SMU (source-measure unit) channels. Use Value: ±125 μV offset and 0.35 μV/°C drift enable <10 ppm accuracy over temperature; rail-to-rail output supports full-scale compliance ranges. |
| X-ray Detector Front-End | Lab Instrumentation DAQ |
|
Use Scenario: Integrating and amplifying charge pulses from scintillation detectors in medical X-ray imaging systems. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier (TIA) stage followed by gain-setting buffer for ADC interface. Use Value: 80 nVPP (0.1–10 Hz) flicker noise minimizes baseline drift in long-integration acquisitions; 27 V/μs slew rate handles fast pulse edges. |
Use Scenario: Buffering high-resolution DAC outputs and conditioning sensor inputs in benchtop multimeters and spectrum analyzers. IC Role / Device Role / Timing Role: Precision output driver for 18-bit DACs and input amplifier for thermocouple/RTD signal chains. Use Value: THD+N = –136 dB (1 kHz) preserves spectral purity; 45 MHz GBW supports wideband calibration signal generation. |
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 | VSSOP-8 package (3.0 × 3.0 mm); identical electrical specs but higher RθJA = 184.9°C/W; no thermal pad | Better suited for space-constrained PCBs where SOIC footprint is prohibitive; requires tighter thermal layout | Select when board area is critical and thermal margin allows higher junction temperature rise |
| ADA4898-1ARMZ | Single-channel; lower noise (0.9 nV/√Hz), higher IQ (7.5 mA), no shutdown; MSOP-8 | Preferred for ultra-low-noise single-ended paths where channel count and power budget permit | Choose when maximizing SNR per channel outweighs dual-channel integration and shutdown capability |
Compared with OPA211AIDR, OPA211AIDGKR offers identical performance in a smaller footprint but demands more careful thermal design, while ADA4898-1ARMZ trades dual-channel integration and shutdown for superior noise and bandwidth - making it optimal for single-path, high-SNR applications where power is not constrained.
Availability
OPA211AIDR 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.
Supply support for OPA211AIDR 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 decades of expertise in precision signal chain components.
The OPA211AIDR belongs to TI's OPAx211 precision op-amp family, engineered specifically for high-resolution data acquisition, test & measurement, and medical imaging systems where low noise, fast settling, and DC accuracy are non-negotiable.
FAQ
What is the maximum supply voltage rating for the OPA211AIDR?
The OPA211AIDR has an absolute maximum supply voltage (VS = V+ – V–) of 40 V. Its recommended operating range is ±2.25 V to ±18 V (dual) or 4.5 V to 36 V (single). Exceeding ±18 V or 36 V risks permanent damage, and operation above 40 V violates absolute maximum ratings per SBOS377L Rev L.
Does the OPA211AIDR support rail-to-rail input common-mode range?
No - the OPA211AIDR features rail-to-rail *output* swing but not rail-to-rail input. Its specified common-mode input voltage range is (V–) + 1.8 V to (V+) – 1.4 V for supplies ≥±5 V. This limitation arises from its JFET input stage architecture and must be accounted for in level-shifting design.
How does the shutdown function behave on the OPA211AIDR?
When the Shutdown pin (Pin 8) is driven ≥(V+) – 0.35 V, the OPA211AIDR disables its output (high-impedance state) and reduces quiescent current to ≤20 μA. Output re-enables within 2 μs when voltage drops to ≤(V+) – 3 V. The pin draws ≤1 μA leakage current in either state.
Is the OPA211AIDR pin-compatible with other devices in the OPAx211 family?
Yes - the OPA211AIDR (dual, SOIC-8) shares identical pinout with OPA211 variants in VSSOP-8 (DGK) and SON-8 (DRG) packages, including matching +IN, –IN, OUT, V+, V–, and Shutdown assignments. However, OPA2211 (dual with different channel mapping) uses a distinct pinout and is not pin-compatible.
What thermal considerations apply to the OPA211AIDR in SOIC-8 package?
The OPA211AIDR in SOIC-8 (D package) has no exposed thermal pad. Its junction-to-ambient thermal resistance is 122.2°C/W on a high-K board. To maintain TJ ≤125°C at full load, keep ambient temperature ≤85°C with ≥2 in² of 2-oz copper pour under the device and ensure adequate airflow or derate output current above 70°C.
OPA211AIDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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-SOIC
OPA211AIDR FAQ
1.How can I place an order for OPA211AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA211AIDR 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 OPA211AIDR reliable?
The price and inventory of OPA211AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA211AIDR is usually 5 days.
3.What payment methods are accepted for OPA211AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA211AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA211AIDR?
OPA211AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA211AIDR 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 OPA211AIDR?
For technical support, including OPA211AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA211AIDR requirements.
6.How does Aetrix verify that OPA211AIDR is sourced from the original manufacturer or authorized distributors?
All OPA211AIDR 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 OPA211AIDR meets industry standards.
7.What is the process for return or replacement of OPA211AIDR?
All OPA211AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA211AIDR, 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 OPA211AIDR part is unused and in its original packaging.
Return procedure for OPA211AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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