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Texas Instruments OPA211SHKQ
- Part No.:
- OPA211SHKQ
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-CSOIC (0.220", 5.65mm Width)
- Datasheet:
-
OPA211SHKQ.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8CFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,585
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Product details
Overview
OPA211SHKQ from Texas Instruments is a high-temperature precision operational amplifier in an 8-pin HKQ ceramic hermetic package, delivering 1.1 nV/√Hz input voltage noise density at 1 kHz, 27 V/μs slew rate, and rail-to-rail output swing across ±2.25 V to ±18 V supplies. It operates continuously from –55°C to 210°C and is used as a loop filter amplifier in down-hole drilling PLL systems.
For engineers reviewing the OPA211SHKQ datasheet, OPA211SHKQ pinout, OPA211SHKQ application, or OPA211SHKQ equivalent, key selection criteria include verified ultra-low noise performance at extreme temperatures, guaranteed 16-bit settling (700 ns), and confirmed operation with asymmetric supply rails - critical for high-reliability industrial sensing and aerospace signal conditioning.
Technical Context
The OPA211SHKQ employs a SiGe bipolar process optimized for extended temperature operation, featuring unity-gain stability, no phase reversal, and internal ESD protection with back-to-back input diodes. Its architecture supports controlled baseline manufacturing with one assembly/test site and one fabrication site.
It achieves low-noise precision via matched transistor pairs and laser-trimmed resistors, enabling stable offset voltage (±240 μV max) and drift (0.35 μV/°C typ) over full temperature range. The device includes shutdown functionality referenced to V+, with enable/disable thresholds defined relative to the positive supply rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Density | 1.1 nV/√Hz at 1 kHz - enables high-fidelity signal amplification in low-amplitude sensor front-ends |
| Offset Voltage | ±240 μV max - ensures minimal DC error in precision data acquisition paths |
| Slew Rate | 27 V/μs - supports fast transient response in closed-loop control and DAC buffering |
| Gain Bandwidth | 45 MHz at G = 1 - provides sufficient bandwidth for 16-bit ADC driver applications |
| Supply Range | ±2.25 V to ±18 V - allows flexible dual-supply configurations including asymmetric rails |
| Operating Temp | –55°C to 210°C - qualified for down-hole, engine-mount, and space-grade environments |
| Settling Time | 700 ns to 16-bit accuracy - meets timing requirements for high-speed precision converters |
Pinout & Package
OPA211SHKQ uses an 8-pin ceramic hermetic HKQ package with metal lid and ceramic base, designed for high-reliability mounting (as-formed or dead-bug). Thermal resistance θJC is 5.7°C/W to ceramic side and 13.7°C/W to metal lid.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection - must be left unconnected or grounded per layout guidelines |
| 2 | –IN | Inverting input - differential node for feedback network in active filter or instrumentation topologies |
| 3 | +IN | Non-inverting input - high-impedance reference point for sensor biasing or reference buffering |
| 4 | V– | Negative supply rail - connects to lowest system potential; supports rail-to-rail output swing |
| 5 | NC | No internal connection - electrically isolated; avoid routing signals or power near this pad |
| 6 | V+ | Positive supply rail - powers core amplifier and internal protection circuitry |
| 7 | OUT | Amplified output - drives ADC inputs, transducer loads, or next-stage filters with 30 mA drive capability |
| 8 | NC | No internal connection - floating terminal; no bonding wire attached |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 200 mV of rails at 10 kΩ load - maximizes dynamic range in single-supply data acquisition |
| Controlled baseline | Single assembly/test site and single fabrication site - ensures consistent parametric distribution across production lots |
| Extended lifecycle support | Product change notification and traceability - required for aerospace, defense, and oilfield OEM programs |
| Shutdown function | Enable/disable referenced to V+ - allows power sequencing and low-power sleep modes in battery-constrained systems |
| Input protection | Back-to-back ESD diodes on inputs - prevents damage from field-induced transients in harsh environments |
Applications
| Down-Hole Drilling Sensor Conditioning | High-Temperature Engine Control Unit |
|---|---|
Use Scenario: Amplifying low-level piezoelectric sensor outputs in borehole tools exposed to 200°C ambient. IC Role / Device Role / Timing Role: Precision op amp configured as low-noise charge amplifier and anti-alias filter driver. Use Value: 1.1 nV/√Hz noise density preserves SNR in microvolt-level seismic signals; 210°C rating eliminates external cooling. | Use Scenario: Buffering thermocouple and RTD signals inside turbine engine control modules. IC Role / Device Role / Timing Role: Rail-to-rail output buffer for analog inputs to 16-bit SAR ADCs operating at 125°C junction. Use Value: 700 ns 16-bit settling ensures accurate sampling at 1 MSPS; ±240 μV offset avoids calibration drift over life. |
| Aerospace Avionics Signal Chain | Industrial Process Monitoring |
Use Scenario: Driving multiplexed analog inputs in flight data recorders subjected to thermal cycling from –55°C to +125°C. IC Role / Device Role / Timing Role: Low-drift gain stage preceding radiation-hardened ADCs in fault-tolerant architectures. Use Value: 0.35 μV/°C drift minimizes recalibration frequency; controlled baseline ensures lot-to-lot consistency for DO-254 compliance. | Use Scenario: Isolating and scaling 4–20 mA loop signals in refinery control cabinets with ambient up to 85°C. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with programmable gain and shutdown for power management. Use Value: Shutdown reduces quiescent current to <1 μA; THD+N of –136 dB prevents harmonic distortion in spectral analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA211SHKJ | Same die, identical electrical specs, but in HKJ ceramic package with different pin 1 marking and thermal path | HKJ has higher θJC to lid (13.7°C/W vs HKQ's 13.7°C/W to lid, 5.7°C/W to ceramic); same footprint but distinct mounting geometry | Select HKJ only if legacy board design specifies HKJ mechanical outline or requires dead-bug mounting with lid-down orientation |
| OPA227UA | Lower temperature rating (–40°C to +85°C), higher voltage noise (3.5 nV/√Hz), no shutdown pin, SO-8 package | Not rated for >125°C operation; unsuitable for down-hole or engine-mount use; lacks ESD robustness for industrial I/O | Use only in commercial-grade lab equipment or non-critical industrial controllers where cost is primary constraint |
Compared with OPA211SHKJ, the OPA211SHKQ offers lower junction-to-case thermal resistance to the ceramic base - critical for conduction-cooled down-hole assemblies. Compared with OPA227UA, it delivers 3× lower noise and 125°C wider operating range, but requires hermetic packaging and higher procurement oversight.
Availability
OPA211SHKQ is available at Aetrix Electronics and suitable for down-hole drilling instrumentation, aerospace avionics signal chains, and high-temperature engine control units requiring stable component supply under extended lifecycle management.
Supply support for OPA211SHKQ 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 high-reliability and high-temperature product lines.
The OPA211 series was designed specifically for precision signal conditioning in extreme environments - targeting oilfield, aerospace, and defense applications where conventional op amps fail due to thermal drift or noise degradation.
FAQ
What is the maximum operating temperature of the OPA211SHKQ?
The OPA211SHKQ is fully specified and tested from –55°C to +210°C ambient temperature. Its silicon die and ceramic HKQ package are qualified for continuous operation at 210°C, with junction temperature limited to 210°C per absolute maximum ratings. This makes OPA211SHKQ suitable for down-hole drilling tools and turbine-mounted sensors where ambient exceeds 150°C.
Does the OPA211SHKQ have a shutdown pin, and how is it controlled?
Yes, the OPA211SHKQ includes a shutdown (enable) function referenced to the positive supply rail (V+). A valid high (≥ V+ – 0.35 V) disables the amplifier, placing the output in high-impedance state; a valid low (≤ V+ – 3 V) enables normal operation. For example, with ±15 V supplies, enable occurs below 12 V and disable above 14.65 V on the shutdown pin. This feature is present in the HKQ package and documented in the OPA211-HT datasheet.
Can the OPA211SHKQ operate with asymmetric supply voltages?
Yes, the OPA211SHKQ supports asymmetric dual supplies - for example, +25 V and –5 V - as explicitly stated in the Applications Information section of the datasheet. Its wide supply range (±2.25 V to ±18 V, or 4.5 V to 36 V total) and rail-to-rail output allow full utilization of available headroom regardless of supply symmetry, making OPA211SHKQ ideal for systems with mixed-voltage domains.
What is the input voltage noise specification of the OPA211SHKQ at 10 Hz?
The OPA211SHKQ has an input voltage noise of 2 nV/√Hz at 10 Hz, as confirmed in Table 1 of the SBOS481D datasheet under ELECTRICAL CHARACTERISTICS. This value, combined with its 80 nVPP (0.1 Hz to 10 Hz) peak-to-peak noise, positions OPA211SHKQ as optimal for low-frequency precision applications such as strain gauge and thermopile amplification where 1/f noise dominates.
Is the OPA211SHKQ pin-compatible with standard SO-8 op amps?
No, the OPA211SHKQ uses an 8-pin ceramic hermetic HKQ package with non-standard pinout and mechanical dimensions - it is not pin-compatible with SO-8, MSOP-8, or TSSOP-8 packages. Pin 1 is marked differently, NC pins occupy positions 1, 5, and 8, and the thermal path is engineered for conduction cooling. Migration from plastic-packaged op amps requires PCB redesign and thermal validation; OPA211SHKQ must be treated as a dedicated high-reliability component.
OPA211SHKQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-CSOIC (0.220", 5.65mm Width)
- Packaging:
- Tube
- 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:
- -55°C ~ 210°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-CFP
OPA211SHKQ FAQ
1.How can I place an order for OPA211SHKQ through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA211SHKQ 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 OPA211SHKQ reliable?
The price and inventory of OPA211SHKQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA211SHKQ is usually 5 days.
3.What payment methods are accepted for OPA211SHKQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA211SHKQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA211SHKQ?
OPA211SHKQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA211SHKQ 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 OPA211SHKQ?
For technical support, including OPA211SHKQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA211SHKQ requirements.
6.How does Aetrix verify that OPA211SHKQ is sourced from the original manufacturer or authorized distributors?
All OPA211SHKQ 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 OPA211SHKQ meets industry standards.
7.What is the process for return or replacement of OPA211SHKQ?
All OPA211SHKQ units undergo pre-shipment inspection (PSI). If there is an issue with OPA211SHKQ, 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 OPA211SHKQ part is unused and in its original packaging.
Return procedure for OPA211SHKQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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