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Texas Instruments OPA211IDGKT
- Part No.:
- OPA211IDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA211IDGKT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,764
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Product details
Overview
OPA211IDGKT from Texas Instruments is a dual, precision, low-noise operational amplifier in VSSOP-8 package, delivering 1.1 nV/√Hz voltage noise density at 1 kHz, 700 ns 16-bit settling time, and rail-to-rail output swing across ±2.25 V to ±18 V supplies. It serves as a high-fidelity signal conditioning amplifier in precision data acquisition front-ends driving 16-bit ADCs.
For engineers reviewing the OPA211IDGKT datasheet, OPA211IDGKT pinout, OPA211IDGKT application, or OPA211IDGKT equivalent, key selection criteria include input voltage noise (1.1 nV/√Hz), offset voltage (≤125 μV max), gain-bandwidth (45 MHz at G = 1), slew rate (27 V/μs), and shutdown functionality with 2 μs turn-on time.
Technical Context
The OPA211IDGKT implements a fully differential, unity-gain stable architecture optimized for low-noise, high-speed precision applications. Its internal design supports rail-to-rail output swing while maintaining 114 dB open-loop gain and 120 dB CMRR over –40°C to +125°C.
It integrates an active shutdown pin (Pin 8) enabling high-impedance output state with ≤20 μA shutdown current, and features matched dual-channel topology with independent inputs and outputs-no shared internal nodes between channels.
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 wideband sensor interfaces |
| Settling time (16-bit) | 700 ns - ensures accurate sampling of fast transient signals into 16-bit ADCs |
| Offset voltage (max) | 125 μV - reduces DC error in precision gain stages without trimming |
| Gain bandwidth | 45 MHz at G = 1 - supports stable closed-loop operation up to ~40 MHz with minimal phase margin loss |
| Slew rate | 27 V/μs - handles ≥10-Vpp signals at ≥2.7 MHz without slewing distortion |
| Supply range | ±2.25 V to ±18 V (or 4.5 V to 36 V single) - accommodates industrial and test equipment rails |
| Shutdown current | ≤20 μA - allows power gating in battery-sensitive portable instrumentation |
Pinout & Package
OPA211IDGKT is packaged in an 8-pin VSSOP (DGK) with 3.00 mm × 3.00 mm body size and exposed thermal pad on underside, requiring solder connection to V– for 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) accepting DC-coupled or AC-coupled signals |
| –IN A (Pin 2) | Inverting input, Channel A | Differential pair input; matched to +IN A for <150 nA input offset current |
| OUT A (Pin 6) | Output, Channel A | Rail-to-rail capable (V– + 0.2 V to V+ – 0.2 V), 30 mA sourcing/sinking |
| V– (Pin 4) | Negative supply | Reference for internal biasing and thermal pad connection point |
| V+ (Pin 7) | Positive supply | Supports up to ±18 V; PSRR >114 dB suppresses supply ripple |
| Shutdown (Pin 8) | Active-high enable control | Drives output to high-Z when ≥(V+) – 0.35 V; turn-on delay ≤2 μs |
| NC (Pins 1, 5) | No internal connection | 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 transducer amplification |
| Rail-to-rail output | Swings within 200 mV of either rail at full load - maximizes dynamic range in single-supply systems |
| 16-bit settling performance | 700 ns to ±1/2 LSB (0.00075%) - eliminates timing guard bands in high-throughput DAQ |
| Integrated shutdown | 2 μs turn-on / 3 μs turn-off with ≤20 μA quiescent current - enables rapid power cycling |
| Wide temperature range | Specified from –40°C to +125°C - suitable for under-hood automotive and industrial environments |
Applications
| Ultrasound Signal Conditioning | Semiconductor Test Equipment |
|---|---|
Use Scenario: Amplifying weak echo signals from piezoelectric transducers before digitization in portable ultrasound scanners. IC Role / Device Role / Timing Role: Low-noise preamplifier stage with 16-bit settling to preserve time-of-flight resolution. Use Value: 1.1 nV/√Hz noise density and 700 ns settling maintain >70 dB SNR across 1–15 MHz bandwidth. | Use Scenario: Precision voltage/current source and measurement circuitry in automated test equipment (ATE) for IC characterization. IC Role / Device Role / Timing Role: Output buffer and feedback amplifier in programmable gain instrumentation loops. Use Value: 125 μV max offset and 0.35 μV/°C drift minimize calibration drift across temperature sweeps. |
| X-ray Detector Front-End | High-Resolution Data Acquisition |
Use Scenario: Integrating charge and amplifying low-current pulses from scintillation detectors in medical imaging systems. IC Role / Device Role / Timing Role: Transimpedance amplifier with low input bias current (±175 nA max) and low noise. Use Value: 80 nVPP (0.1–10 Hz) input noise and rail-to-rail output support wide dynamic range pulse height analysis. | Use Scenario: Driving SAR and sigma-delta ADC inputs in lab-grade digital multimeters and oscilloscope front-ends. IC Role / Device Role / Timing Role: Precision buffer and anti-aliasing filter driver with fast settling. Use Value: 45 MHz GBW and 27 V/μs slew rate enable accurate reconstruction of multi-MHz analog waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA211IDRCT | VSSOP-8 package same; identical electrical specs but rated for standard grade (not high-grade OPA211) | No difference in functional use; same pinout and performance envelope | Select OPA211IDRCT if high-grade screening (±50 μV offset) is not required and cost optimization is prioritized |
| ADA4898-2ARMZ | Higher 1.0 nV/√Hz noise, 210 MHz GBW, but 7.5 mA/ch supply current vs 3.6 mA | Better speed/noise trade-off; less suitable for low-power portable instrumentation | Choose ADA4898-2ARMZ only when >100 MHz bandwidth is mandatory and power budget allows +110% current draw |
Compared with OPA211IDGKT, OPA211IDRCT offers identical form-factor and baseline performance at lower cost, while ADA4898-2ARMZ trades 2.1× higher supply current for 4.7× higher bandwidth-making OPA211IDGKT optimal for battery-powered, precision, medium-speed DAQ where noise and power are co-constrained.
Availability
OPA211IDGKT is available at Aetrix Electronics and suitable for ultrasound scanner front-ends, semiconductor test instrumentation, and seismic data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for OPA211IDGKT 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 amplifiers, data converters, and power management ICs.
The OPAx211 product line was designed for high-fidelity signal chain applications demanding ultra-low noise, fast settling, and rail-to-rail output-targeting test & measurement, medical imaging, and industrial DAQ systems operating across –40°C to +125°C.
FAQ
What is the maximum allowable supply voltage for OPA211IDGKT?
The OPA211IDGKT supports a total supply voltage (V+ to V–) up to 40 V, with recommended operation 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. Operation at ±18 V delivers full specified performance including 700 ns 16-bit settling and 1.1 nV/√Hz noise density.
Does OPA211IDGKT support rail-to-rail input common-mode range?
No, OPA211IDGKT does not support rail-to-rail input. Its common-mode input voltage range is (V–) + 1.8 V to (V+) – 1.4 V for VS ≥ ±5 V. This limitation requires careful biasing in single-supply configurations-for example, with V– = 0 V and V+ = 15 V, valid input range is 1.8 V to 13.6 V. The rail-to-rail capability applies only to the output stage.
How does the shutdown function behave on OPA211IDGKT?
OPA211IDGKT's shutdown pin (Pin 8) is active-high: device enables when VSHUTDOWN ≤ (V+) – 3 V, and disables when VSHUTDOWN ≥ (V+) – 0.35 V. In shutdown, output enters high-impedance state and quiescent current drops to ≤20 μA. Turn-on time is ≤2 μs and turn-off time ≤3 μs, verified per datasheet Figure 37 and Table 6.6.
Can OPA211IDGKT drive heavy capacitive loads directly?
OPA211IDGKT is not unity-gain stable into arbitrary capacitive loads. While it drives ≥100 pF with moderate overshoot (Figure 28), stability degrades beyond that. For CL > 100 pF, external compensation (e.g., series resistor at output) or isolation buffer is required. Datasheet Figure 28 shows 20% overshoot at 100 pF in G = +1 configuration-designers must verify phase margin in final layout.
What is the thermal pad connection requirement for OPA211IDGKT?
The exposed thermal pad on the underside of the OPA211IDGKT VSSOP package must be soldered to PCB copper and electrically connected to V–. This is mandatory-not optional-as stated in Pin Functions section: "Soldering the thermal pad to the printed circuit board is required and improves heat dissipation and provides specified performance." Failure to connect it risks thermal runaway and degraded noise/offset specs.
OPA211IDGKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm 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-VSSOP
OPA211IDGKT FAQ
1.How can I place an order for OPA211IDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA211IDGKT 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 OPA211IDGKT reliable?
The price and inventory of OPA211IDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA211IDGKT is usually 5 days.
3.What payment methods are accepted for OPA211IDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA211IDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA211IDGKT?
OPA211IDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA211IDGKT 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 OPA211IDGKT?
For technical support, including OPA211IDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA211IDGKT requirements.
6.How does Aetrix verify that OPA211IDGKT is sourced from the original manufacturer or authorized distributors?
All OPA211IDGKT 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 OPA211IDGKT meets industry standards.
7.What is the process for return or replacement of OPA211IDGKT?
All OPA211IDGKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA211IDGKT, 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 OPA211IDGKT part is unused and in its original packaging.
Return procedure for OPA211IDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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