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Texas Instruments OPA211SHKJ
- Part No.:
- OPA211SHKJ
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-CFlatPack
- Datasheet:
-
OPA211SHKJ.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8CFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,090
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Product details
Overview
OPA211SHKJ from Texas Instruments is a high-temperature precision operational amplifier in an 8-pin HKJ ceramic hermetic package, delivering 1.1 nV/√Hz input voltage noise density at 1 kHz, 27 V/μs slew rate, and 700 ns 16-bit settling time across ±2.25 V to ±18 V supplies. It operates from –55°C to 210°C and serves as a loop filter amplifier in PLLs or ADC driver in down-hole drilling instrumentation.
For engineers reviewing the OPA211SHKJ datasheet, OPA211SHKJ pinout, OPA211SHKJ application, or OPA211SHKJ equivalent, this page provides verified thermal, noise, gain-bandwidth, and rail-to-rail output performance data specific to the HKJ-packaged high-temperature variant - critical for extreme-environment signal conditioning, precision data acquisition, and high-reliability analog front-end design.
Technical Context
The OPA211SHKJ uses a SiGe bipolar process optimized for extended temperature operation, featuring unity-gain stability, rail-to-rail output swing, and internal ESD protection with back-to-back input diodes. Its architecture supports low-noise closed-loop configurations up to 80 MHz GBW (G = 100) while maintaining 0.35 μV/°C offset drift and THD+N of –136 dB at 1 kHz.
It is specified over –55°C to 210°C with junction temperature limited to 210°C, and includes shutdown functionality referenced to V+, enabling high-impedance output state control. The device does not support comparator operation due to limited differential input range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Noise Density | 1.1 nV/√Hz at 1 kHz - enables ultra-low-noise signal amplification in sensor front-ends and PLL loop filters |
| Gain Bandwidth | 80 MHz at G = 100 - supports high-speed closed-loop precision filtering without phase margin loss |
| Slew Rate | 27 V/μs - ensures faithful reproduction of fast transients in 10-V output swings |
| 16-Bit Settling | 700 ns (±10 V step, CL = 100 pF) - guarantees full accuracy for driving 16-bit ADCs in real-time systems |
| Offset Voltage | ±240 μV max (TA = –55°C to 125°C) - minimizes DC error in precision measurement paths |
| Supply Range | ±2.25 V to ±18 V or 4.5 V to 36 V - accommodates asymmetric rails and wide industrial power architectures |
| Operating Temp | –55°C to 210°C - validated for continuous operation in down-hole, aerospace, and engine-control environments |
Pinout & Package
OPA211SHKJ is housed in an 8-pin HKJ ceramic hermetic package with metal lid, designed for high-reliability mounting in "dead bug" or formed-lead configurations. Thermal resistance θJC is 5.7°C/W to ceramic case side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No internal connection - electrically isolated; must be left unconnected or grounded per layout guidelines |
| 2 | –IN | Inverting input - accepts differential signal with 109 || 2 Ω||pF common-mode impedance |
| 3 | +IN | Non-inverting input - referenced to VCM range (V–)+1.8 V to (V+)-1.4 V at ±5 V supply |
| 4 | V– | Negative supply rail - supports dual-supply operation down to ±2.25 V or single-supply as low as 4.5 V |
| 5 | NC | No internal connection - no bonding wire; floating or grounded per mechanical stress mitigation |
| 6 | V+ | Positive supply rail - powers core and output stage; shutdown pin reference is derived from this node |
| 7 | OUT | Rail-to-rail output - delivers ±(V+)–0.2 V to ±(V–)+0.2 V swing into 10 kΩ load at 25°C |
| 8 | NC | No internal connection - thermally and electrically isolated; may serve as heatsink pad in custom mounting |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low voltage noise | 1.1 nV/√Hz at 1 kHz - reduces integrated noise floor in <100-kΩ source impedance applications |
| High-temperature qualification | –55°C to 210°C operating range - meets extended life-cycle requirements for oil/gas and aerospace deployments |
| Rail-to-rail output | Swings within 200 mV of rails into 10 kΩ - maximizes dynamic range in low-voltage precision systems |
| Shutdown control | V+–3 V to V+–0.35 V logic threshold - enables low-power sleep mode with high-Z output state |
| Unity-gain stable | No external compensation required - simplifies PCB layout for G ≥ 1 configurations |
| THD+N performance | –136 dB at 1 kHz, G = 1 - preserves signal fidelity in audio and high-resolution DAC buffering |
Applications
| Down-Hole Drilling Instrumentation | High-Temperature Engine Control |
|---|---|
Use Scenario: Signal conditioning of resistivity and gamma-ray sensor outputs in borehole tools exposed to >175°C ambient. IC Role / Device Role / Timing Role: Precision low-noise amplifier in analog front-end before 16-bit SAR ADC sampling at 1 MSPS. Use Value: 700 ns 16-bit settling and 0.35 μV/°C drift ensure measurement repeatability across thermal transients. |
Use Scenario: Closed-loop feedback amplification for exhaust gas oxygen (EGO) sensor signals in turbine engine controllers. IC Role / Device Role / Timing Role: Rail-to-rail output buffer driving ADC reference path under cyclic thermal stress from combustion cycles. Use Value: ±240 μV max offset and 210°C junction rating maintain calibration integrity without active thermal compensation. |
| Avionics Sensor Signal Chain | Industrial Process Monitoring |
Use Scenario: Amplifying low-level piezoelectric vibration sensor outputs in flight control surface health monitoring units. IC Role / Device Role / Timing Role: Low-noise preamplifier in PLL-based synchronous demodulation path for SNR enhancement. Use Value: 1.1 nV/√Hz noise density and 80 MHz GBW enable detection of sub-millivolt harmonics amid EMI-rich avionics bays. |
Use Scenario: Isolated current-sense amplifier output stage in high-voltage motor drive protection circuits. IC Role / Device Role / Timing Role: High-speed output driver interfacing shunt voltage to isolated sigma-delta modulator input. Use Value: 27 V/μs slew rate and 30 mA output current support fast fault response (<1 μs) in SIL-2 compliant systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA211SHKQ | Same die, HKQ ceramic package with different leadform and thermal resistance (θJC = 13.7°C/W to lid) | Preferred for surface-mount reflow assembly; lower thermal conductivity than HKJ but identical electrical specs | Select HKQ when automated placement and standard SMT processes are prioritized over maximum thermal dissipation |
| OPA227UA | Lower temperature grade (–40°C to +85°C), higher voltage noise (3.5 nV/√Hz), no shutdown pin | Not qualified for >125°C operation; unsuitable for down-hole or engine bay use | Choose only for commercial-grade lab equipment or non-extreme industrial applications where cost is primary |
Compared with OPA211SHKQ, the OPA211SHKJ offers superior thermal conduction to the case (5.7 vs. 13.7°C/W), making it preferred for sustained 210°C junction operation; versus OPA227UA, it delivers 3× lower noise and full high-temperature qualification - essential for mission-critical analog signal integrity.
Availability
OPA211SHKJ is available at Aetrix Electronics and suitable for down-hole drilling instrumentation, high-temperature engine control systems, and avionics sensor signal chains requiring stable component supply across extended temperature lifecycles.
Supply support for OPA211SHKJ 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, embedded processing, and high-reliability components, with decades of heritage in precision op amps and high-temperature solutions.
The OPA211 series belongs to TI's high-temperature precision op amp product line, engineered specifically for signal integrity in extreme thermal environments such as oil/gas exploration, aerospace, and turbine control - not general-purpose amplification.
FAQ
What is the maximum junction temperature specification for OPA211SHKJ?
The OPA211SHKJ has a maximum junction temperature (TJ) of 210°C, fully characterized and guaranteed across its –55°C to 210°C operating ambient range. This rating is supported by TI's controlled baseline manufacturing, extended product lifecycle validation, and electromigration derating data showing 10-year reliability at 105°C junction temperature - making OPA211SHKJ suitable for continuous operation in down-hole tools and jet engine controllers where thermal margins are critical.
Does OPA211SHKJ support rail-to-rail input operation?
No, the OPA211SHKJ does not support rail-to-rail input operation. Its common-mode input voltage range is specified as (V–) + 1.8 V to (V+) – 1.4 V at ±5 V supply, and it is explicitly not intended for comparator use due to limited differential input range capability. However, it does provide rail-to-rail output swing - delivering within 200 mV of both supply rails into 10 kΩ loads - which maximizes dynamic range in precision output stages.
How is the shutdown function implemented on OPA211SHKJ?
The OPA211SHKJ shutdown pin is referenced to the positive supply (V+), with a valid high defined as V+ – 0.35 V and a valid low as V+ – 3 V. When disabled, the output enters a high-impedance state. For example, at ±15 V supplies, the device enables below 12 V and disables at or above 14.65 V on the shutdown pin. The pin must never be left floating and requires explicit biasing to ensure reliable enable/disable timing - typical turn-on/turn-off transients are documented in Figures 40–42 of the SBOS481D datasheet.
Can OPA211SHKJ drive capacitive loads, and what is the recommended compensation?
Yes, the OPA211SHKJ can drive capacitive loads up to 100 pF while maintaining stability in unity-gain configuration, as verified in Figure 29 (Small-Signal Overshoot vs Capacitive Load). For loads >100 pF, TI recommends adding a series resistor (e.g., 604 Ω) between the output and capacitor, as shown in Figure 26–27 test circuits. This isolation resistor prevents peaking and ensures monotonic step response - critical for driving ADC input capacitance or long PCB traces in high-temperature environments where parasitic effects intensify.
What is the input protection scheme used in OPA211SHKJ?
The OPA211SHKJ incorporates back-to-back ESD diodes between the inverting and non-inverting inputs, as shown in Figure 44 of the SBOS481D datasheet. These diodes protect against excessive differential voltage but may forward-bias during fast-ramping input signals in low-gain configurations, limiting input current to ≤10 mA. To prevent unintended conduction, TI recommends using an input series resistor - though this degrades noise performance and must be weighed against source impedance and bandwidth requirements in the final design.
OPA211SHKJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-CFlatPack
- 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
OPA211SHKJ FAQ
1.How can I place an order for OPA211SHKJ through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA211SHKJ 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 OPA211SHKJ reliable?
The price and inventory of OPA211SHKJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA211SHKJ is usually 5 days.
3.What payment methods are accepted for OPA211SHKJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA211SHKJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA211SHKJ?
OPA211SHKJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA211SHKJ 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 OPA211SHKJ?
For technical support, including OPA211SHKJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA211SHKJ requirements.
6.How does Aetrix verify that OPA211SHKJ is sourced from the original manufacturer or authorized distributors?
All OPA211SHKJ 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 OPA211SHKJ meets industry standards.
7.What is the process for return or replacement of OPA211SHKJ?
All OPA211SHKJ units undergo pre-shipment inspection (PSI). If there is an issue with OPA211SHKJ, 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 OPA211SHKJ part is unused and in its original packaging.
Return procedure for OPA211SHKJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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