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Texas Instruments OPA2333SKGD1
- Part No.:
- OPA2333SKGD1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- Die
- Datasheet:
-
OPA2333SKGD1.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC DIE
- Quantity:
- Payment:
- Shipping:
Inventory:4,632
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Product details
Overview
OPA2333SKGD1 from Texas Instruments is a high-temperature, dual-channel, zero-drift CMOS operational amplifier designed for precision signal conditioning in extreme environments. It delivers 26 μV max offset voltage, 0.05 μV/°C drift over –55°C to 210°C, 50 μA quiescent current per amplifier, rail-to-rail input/output, and 1.8 V to 5.5 V supply operation - enabling accurate sensor interfacing in down-hole drilling instrumentation.
For engineers reviewing the OPA2333SKGD1 datasheet, OPA2333SKGD1 pinout, OPA2333SKGD1 application, or OPA2333SKGD1 equivalent, this device is selected for ultra-stable DC gain stages requiring sub-microvolt offset integrity across wide temperature excursions and low-power single-supply operation.
Technical Context
The OPA2333SKGD1 implements a proprietary auto-calibration architecture that continuously corrects input offset every 8 μs using a 350-kHz auxiliary amplifier, eliminating 1/f noise and achieving near-zero drift without aliasing. Its CMOS input stage provides ±70 pA typical bias current at 25°C and supports common-mode voltages extending 100 mV beyond rails.
This dual op-amp features unity-gain stability, no output phase reversal, and an open-loop gain of ≥85 dB at 210°C. Its rail-to-rail output swings within 150 mV of both rails under load and maintains 102 dB CMRR at 25°C - critical for driving SAR ADCs with minimal differential nonlinearity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage (max) | 26 μV over –55°C to 210°C - ensures <±50 μV total system offset error in uncalibrated high-temp sensor front-ends |
| Offset Drift (max) | 0.05 μV/°C over –55°C to 210°C - enables stable DC gain accuracy without periodic recalibration |
| Quiescent Current | 50 μA per amplifier at 210°C - supports battery- or energy-harvested operation in sealed down-hole modules |
| Supply Range | 1.8 V to 5.5 V - allows direct interface with 2.0 V–3.3 V microcontrollers and low-voltage ADCs |
| Input Common-Mode Range | (V−) − 0.25 V to (V+) + 0.25 V at 210°C - accommodates signals exceeding rails by 250 mV without clipping |
| Output Swing | Within 150 mV of rails at 25°C; within 150 mV at 210°C - preserves full dynamic range for 12-bit+ ADC digitization |
| Gain-Bandwidth Product | 350 kHz at −55°C to 210°C - sufficient for anti-alias filtering and slow-control-loop amplification |
Pinout & Package
OPA2333SKGD1 is housed in an 8-pin SOIC package (body size 4.90 mm × 3.91 mm), rated for operation from –55°C to 210°C. The package uses standard JEDEC MS-012AC dimensions and is lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT A | Analog output, Channel A | Delivers rail-to-rail buffered signal; drives loads ≥10 kΩ without gain error |
| 2 - –IN A | Inverting input, Channel A | Accepts differential input; biased at VCM = VS/2 for optimal CMRR performance |
| 3 - +IN A | Noninverting input, Channel A | High-impedance node (4 pF typical); requires symmetric layout to minimize thermoelectric offset |
| 4 - V− | Negative supply terminal | Reference for internal biasing; must be decoupled with 0.1 μF capacitor near pin |
| 5 - +IN B | Noninverting input, Channel B | Independent high-Z input; usable for differential sensing or reference buffering |
| 6 - –IN B | Inverting input, Channel B | Matches Channel A characteristics; supports dual-sensor or chopper-stabilized configurations |
| 7 - OUT B | Analog output, Channel B | Electrically isolated output stage; enables independent gain paths or redundancy |
| 8 - V+ | Positive supply terminal | Accepts 1.8–5.5 V; requires local 0.1 μF ceramic decoupling to suppress PSRR degradation |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-calibration | Continuous 8-μs correction cycle eliminates 1/f noise and ensures <0.05 μV/°C drift over full temp range |
| Rail-to-rail input & output | Input extends 250 mV beyond rails at 210°C; output swings to within 150 mV of both rails - maximizes usable signal swing |
| High-temperature qualification | 100% production tested at 210°C junction temperature; qualified for 1000 hrs continuous operation at max rating |
| No output phase reversal | Guaranteed monotonic response during input overdrive - prevents latch-up in closed-loop sensor systems |
| Low input bias current | ±70 pA typ at 25°C; remains ≤±5.3 nA at 210°C - minimizes leakage-induced offset in high-Z pH or thermocouple circuits |
Applications
| Down-Hole Drilling Sensor Front-End | High-Temperature Industrial Transmitter |
|---|---|
|
Use Scenario: Signal conditioning for resistive temperature detectors (RTDs) and strain gauges located inside oil/gas wellbores at sustained 175–210°C ambient. IC Role / Device Role / Timing Role: Dual-channel precision amplifier providing matched gain and offset correction for bridge-based sensors before 24-bit ΣΔ ADC digitization. Use Value: 26 μV max offset and 0.05 μV/°C drift ensure ≤0.1% FS error over full temperature range without calibration - reducing field maintenance cycles. |
Use Scenario: Analog output stage in smart pressure transmitters deployed in geothermal power plants where ambient exceeds 150°C. IC Role / Device Role / Timing Role: Rail-to-rail I/V converter generating 4–20 mA loop current from microcontroller DAC output under single 3.3 V supply. Use Value: 50 μA quiescent current per channel enables full functionality within 3.5 mA loop budget while maintaining 16-bit linearity. |
| Aerospace Engine Monitoring Interface | Extended-Life Battery-Powered Telemetry |
|
Use Scenario: Signal amplification for turbine vibration sensors in jet engine nacelles exposed to intermittent 200°C thermal spikes. IC Role / Device Role / Timing Role: Low-noise, high-CMRR buffer isolating piezoelectric sensor outputs from noisy digital subsystems. Use Value: 102 dB CMRR at 25°C and >91 dB at 210°C rejects common-mode EMI from ignition systems without external filtering. |
Use Scenario: Precision analog front-end in wireless seismic sensor nodes powered by primary lithium batteries with 10-year design life. IC Role / Device Role / Timing Role: Micropower dual op-amp performing sensor biasing, gain, and level-shifting prior to ultra-low-power ADC sampling. Use Value: 50 μA per amplifier at 210°C enables multi-year operation on coin-cell energy; zero-drift eliminates long-term calibration drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333HD | Same zero-drift core and electrical specs, but packaged in CFP-8 (7.035 mm × 5.75 mm) with higher thermal mass and different mounting footprint | Preferred for conduction-cooled PCBs where SOIC thermal resistance (RθJA = 117.5°C/W) is insufficient | Select OPA2333HD when board-level heat sinking via case lid is available and SOIC thermal derating is marginal |
| OPA2189IDRCT | Lower 2.5 μV max offset and 0.005 μV/°C drift, but rated only to 125°C and consumes 130 μA per amplifier | Suitable for commercial/industrial systems with active cooling and tighter offset budgets, not for passive high-temp deployment | Choose OPA2189IDRCT only if operating temperature stays ≤125°C and sub-5 μV offset justifies 2.6× higher IQ |
Compared with OPA2333HD, OPA2333SKGD1 offers identical electrical performance in a smaller, surface-mount SOIC package optimized for airflow-limited down-hole PCBs; versus OPA2189IDRCT, it trades ultra-low offset for guaranteed 210°C operation and 58% lower quiescent current - making it the sole choice for uncooled, long-duration high-temperature deployments.
Availability
OPA2333SKGD1 is available at Aetrix Electronics and suitable for down-hole drilling instrumentation, aerospace engine monitoring, and geothermal industrial transmitters requiring stable component supply across extended temperature lifecycles.
Supply support for OPA2333SKGD1 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 heritage in high-reliability, high-temperature analog ICs.
The OPA2333 product line was engineered specifically for precision signal acquisition in extreme thermal environments - targeting oilfield, aerospace, and nuclear applications where conventional op-amps fail.
FAQ
What is the maximum operating temperature of the OPA2333SKGD1?
The OPA2333SKGD1 is fully specified and production-tested for continuous operation from –55°C to +210°C ambient temperature. Its junction temperature rating matches this range, and it is qualified for 1000 hours of uninterrupted operation at 210°C - making it one of the highest-temperature-rated precision op-amps commercially available. This rating applies to the SOIC package variant identified as OPA2333SKGD1.
Does the OPA2333SKGD1 require external capacitors for stability?
No, the OPA2333SKGD1 is unity-gain stable and does not require external compensation capacitors. However, TI recommends placing a 0.1-μF ceramic decoupling capacitor between V+ and V− pins, as close as possible to the device, to maintain PSRR and prevent oscillation under noisy supply conditions. This is especially critical in high-temperature PCB layouts where parasitic inductance increases.
Can the OPA2333SKGD1 drive ADC inputs directly?
Yes, the OPA2333SKGD1 is explicitly optimized for driving SAR and ΣΔ ADCs. Its rail-to-rail output swings within 150 mV of both rails, its excellent CMRR (>91 dB at 210°C) prevents differential nonlinearity degradation, and its zero-drift architecture eliminates offset-induced code errors. The datasheet confirms clean settling behavior into typical 10–100 pF ADC input capacitances without external isolation resistors.
What is the input bias current of the OPA2333SKGD1 at 210°C?
At the maximum operating temperature of 210°C, the input bias current of the OPA2333SKGD1 is characterized at ±5300 pA (±5.3 nA). This value is production-tested and guaranteed - significantly higher than the ±70 pA typical at 25°C, but still among the lowest available for any op-amp rated to 210°C. Layout best practices (symmetric traces, low-thermoelectric metals) are essential to avoid additional offset contributions.
Is the OPA2333SKGD1 pin-compatible with other OPA2333 variants?
Yes, the OPA2333SKGD1 shares identical pinout and footprint with all other 8-pin OPA2333-HT variants, including OPA2333HD (CFP-8) and OPA2333JD (CDIP SB). All use the same SOIC-8 pin configuration: OUT A, –IN A, +IN A, V−, +IN B, –IN B, OUT B, V+. Mechanical mounting differs for non-SOIC packages, but electrical connectivity and PCB layout remain consistent across the family.
OPA2333SKGD1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- Die
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS, Zero-Drift
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.16V/µs
- Gain Bandwidth Product:
- 350 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 70 pA
- Voltage - Input Offset:
- 2 µV
- Current - Supply:
- 17µA (x2 Channels)
- Current - Output / Channel:
- 5 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -55°C ~ 210°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Die
OPA2333SKGD1 FAQ
1.How can I place an order for OPA2333SKGD1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2333SKGD1 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 OPA2333SKGD1 reliable?
The price and inventory of OPA2333SKGD1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2333SKGD1 is usually 5 days.
3.What payment methods are accepted for OPA2333SKGD1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2333SKGD1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2333SKGD1?
OPA2333SKGD1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2333SKGD1 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 OPA2333SKGD1?
For technical support, including OPA2333SKGD1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2333SKGD1 requirements.
6.How does Aetrix verify that OPA2333SKGD1 is sourced from the original manufacturer or authorized distributors?
All OPA2333SKGD1 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 OPA2333SKGD1 meets industry standards.
7.What is the process for return or replacement of OPA2333SKGD1?
All OPA2333SKGD1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2333SKGD1, 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 OPA2333SKGD1 part is unused and in its original packaging.
Return procedure for OPA2333SKGD1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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