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Texas Instruments OPA2333HD
- Part No.:
- OPA2333HD
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2333HD.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
OPA2333HD 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 single-supply operation - enabling accurate sensor interfacing in down-hole drilling instrumentation.
For engineers reviewing the OPA2333HD datasheet, OPA2333HD pinout, OPA2333HD application, or OPA2333HD equivalent, this page provides verified technical context, package mapping, thermal derating data, real-world use value in high-temp analog front-ends, and validated alternative options for extended-temperature op-amp selection.
Technical Context
The OPA2333HD implements a proprietary auto-calibration architecture that continuously corrects input offset every 8 μs using a 350-kHz internal chopper-stabilized amplifier, eliminating 1/f noise and achieving near-zero drift without aliasing. Its input stage supports common-mode voltage from (V–) – 0.25 V to (V+) + 0.25 V across the full –55°C to 210°C operating range.
This device uses a CMOS input stage with ±5300 pA max input bias current at 210°C and achieves 91 dB min CMRR at same temperature, enabling stable DC-coupled gain in high-impedance sensor interfaces where thermoelectric effects and supply ripple must be rejected without crossover distortion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 26 μV maximum at –55°C to 210°C - ensures ≤0.1% full-scale error in 25 mV sensor outputs without trimming. |
| Offset Drift | 0.05 μV/°C over –55°C to 210°C - enables <1 μV total drift across 265°C span, critical for uncooled down-hole systems. |
| Supply Range | 1.8 V to 5.5 V single supply - supports direct interface with low-voltage microcontrollers and battery-backed sensors. |
| Quiescent Current | 50 μA per amplifier at 210°C - allows continuous operation in power-constrained, sealed high-temp modules. |
| Input Common-Mode Range | (V–) – 0.25 V to (V+) + 0.25 V at 210°C - permits direct connection to transducers biased beyond rails without external level-shifting. |
| Output Swing | Within 150 mV of rails at 210°C - maintains ≥94% dynamic range for 0–5 V ADC inputs under extreme thermal stress. |
| Gain-Bandwidth | 350 kHz at –55°C to 210°C - sufficient for anti-alias filtering and closed-loop control up to ~35 kHz in high-temp feedback paths. |
Pinout & Package
OPA2333HD is supplied in an 8-pin CFP (Ceramic Flatpack) package with dimensions 7.035 mm × 5.75 mm, rated for –55°C to 210°C operation and qualified for 1000 hours continuous life at max junction temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT A | Analog output channel A | Delivers rail-to-rail output swing; requires local 0.1 μF decoupling to V+ and V– for stability in high-temp PCB layouts. |
| 2 –IN A | Inverting analog input channel A | High-impedance CMOS node; sensitive to thermoelectric gradients - must match trace geometry and material to +IN A. |
| 3 +IN A | Noninverting analog input channel A | Accepts signals up to 0.25 V beyond supply rails; paired with –IN A to form precision differential front-end for RTD/thermocouple amps. |
| 4 V– | Negative power supply terminal | Reference for internal auto-calibration circuitry; must be connected directly to low-inductance ground plane with shortest possible path. |
| 5 +IN B | Noninverting analog input channel B | Enables dual-channel signal conditioning - e.g., simultaneous pressure and temperature sensing in single-package ASIC replacement. |
| 6 –IN B | Inverting analog input channel B | Electrically identical to –IN A; layout symmetry between both channels required to maintain matched drift performance. |
| 7 OUT B | Analog output channel B | Independent output stage; supports separate feedback networks - used for reference buffering or dual-sensor excitation. |
| 8 V+ | Positive power supply terminal | Accepts 1.8–5.5 V; internal ESD protection clamps to rails - input overvoltage >0.5 V beyond rails requires series current-limiting resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-calibration | Continuous 8-μs correction cycle eliminates 1/f noise and ensures <1 μV total offset drift over 265°C temperature span. |
| Rail-to-rail I/O | Input extends 0.25 V beyond supplies; output swings within 150 mV of rails at 210°C - maximizes usable ADC range in single-supply systems. |
| High-temp qualification | 1000-hour continuous operation at 210°C junction temperature; electromigration-limited lifetime model validated per JEDEC JESD47. |
| Low quiescent power | 50 μA per amplifier at 210°C - enables multi-year battery life in remote telemetry nodes deployed in geothermal wells. |
| CMOS input stage | ±5300 pA max input bias at 210°C - reduces voltage error across 10 MΩ sensor bridges to <53 mV, preserving measurement integrity. |
Applications
| Down-Hole Pressure Sensing | High-Temp Motor Phase Monitoring |
|---|---|
|
Use Scenario: Signal conditioning of piezoresistive pressure transducers located inside oil/gas wellbores at 200°C ambient. IC Role / Device Role / Timing Role: Dual-channel precision amplifier - one channel conditions bridge output, second buffers reference voltage for ADC. Use Value: 26 μV offset and 0.05 μV/°C drift ensure <0.05% FS error over full temperature range without calibration, reducing field maintenance cycles. |
Use Scenario: Isolated current sensing of motor phase currents in electric submersible pumps operating continuously at 180°C. IC Role / Device Role / Timing Role: High-side voltage-to-current converter driving shunt-based feedback into isolated sigma-delta modulator. Use Value: Rail-to-rail output swing and 350 kHz GBW enable accurate 10 kHz current waveform capture with <1 LSB error at 16-bit resolution. |
| Geothermal Sensor Interface | Aerospace Actuator Feedback |
|
Use Scenario: Amplifying low-level thermocouple outputs (Type K, 41 μV/°C) in geothermal energy extraction systems exposed to 210°C ambient. IC Role / Device Role / Timing Role: Cold-junction compensation amplifier with matched input pairs minimizing thermoelectric offset generation. Use Value: Input common-mode range extending 0.25 V beyond rails allows direct connection to thermocouple without level-shifting, cutting BOM cost by 3 components. |
Use Scenario: Closed-loop position feedback for hydraulic actuators in jet engine nacelles where ambient reaches 175°C during takeoff. IC Role / Device Role / Timing Role: Precision buffer for LVDT secondary winding output, driving 12-bit SAR ADC with minimal gain error. Use Value: 91 dB CMRR at 210°C rejects common-mode noise from high-power actuator drivers, maintaining ±0.02% linearity over full stroke. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, high-temperature operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333HKJ | Same die, 8-pin CFP package but 6.90 mm × 5.65 mm body size; 57.7°C/W RθJC(top) vs 62.0°C/W for OPA2333HD. | Identical electrical specs and temp range; slightly lower thermal resistance enables marginally higher power dissipation in conduction-cooled modules. | Select OPA2333HKJ when board-level thermal management favors top-side heat extraction via metal lid contact. |
| OPA2333JD | Same die, 8-pin CDIP SB package (18.55 mm × 7.49 mm); RθJA = 117.5°C/W vs unlisted for HD; rated only to 175°C. | Larger footprint and lower max temperature rating limit use to less extreme environments; higher RθJA demands forced-air cooling. | Choose OPA2333JD only if legacy through-hole assembly is required and operating temperature stays ≤175°C. |
Compared with OPA2333HKJ and OPA2333JD, the OPA2333HD offers the largest thermal margin at 210°C via its optimized 7.035 mm × 5.75 mm CFP package and lowest RθJC(bottom) of 56.9°C/W, making it the sole option qualified for continuous operation in >200°C down-hole electronics.
Availability
OPA2333HD is available at Aetrix Electronics and suitable for down-hole drilling instrumentation, aerospace actuator feedback systems, and geothermal sensor interfaces requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for OPA2333HD 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, high-temperature analog ICs for industrial and aerospace markets.
The OPA2333HD belongs to TI's high-temperature zero-drift op-amp product line, engineered specifically for precision signal acquisition in environments where conventional op-amps fail - including oil/gas exploration, jet propulsion, and nuclear monitoring systems.
FAQ
What is the maximum operating temperature of the OPA2333HD?
The OPA2333HD is rated for continuous operation from –55°C to +210°C ambient temperature, with junction temperature limited to 210°C. Its qualification includes 1000 hours of life testing at maximum rated temperature, and reliability modeling confirms 10-year operational life at 105°C junction temperature. This makes OPA2333HD suitable for down-hole drilling tools and jet engine control electronics where ambient exceeds 200°C.
Does the OPA2333HD require external capacitors for stability?
Yes, the OPA2333HD requires local 0.1-μF ceramic decoupling capacitors placed as close as possible between V+ and V– pins to ensure stability under high-temperature conditions. The datasheet specifies these capacitors are mandatory for reliable operation, especially in noisy or high-impedance power supply environments typical of down-hole telemetry systems. Omitting them risks oscillation or degraded PSRR performance above 10 kHz.
How does the auto-calibration architecture of the OPA2333HD eliminate drift?
The OPA2333HD uses a proprietary time-continuous auto-calibration technique that corrects input offset voltage every 8 μs using a dedicated 350-kHz internal amplifier. Unlike traditional choppers, this method avoids sampling artifacts and aliasing, delivering true zero-drift performance with no 1/f noise. As a result, OPA2333HD achieves 0.05 μV/°C max drift over –55°C to 210°C - critical for uncalibrated DC measurements in inaccessible high-temp installations.
Can the OPA2333HD drive heavy capacitive loads?
The OPA2333HD is unity-gain stable but not optimized for heavy capacitive loads; its small-signal step response shows increasing overshoot above 100 pF, and large-signal settling degrades significantly beyond 500 pF. For loads >100 pF, a series isolation resistor (typically 10–50 Ω) is recommended between output and capacitance. This limitation is documented in Figure 16 of the OPA2333HD datasheet and applies equally across its full –55°C to 210°C operating range.
Is the OPA2333HD pin-compatible with other variants in the OPA2333-HT family?
Yes, all OPA2333-HT variants - including OPA2333HD, OPA2333HKJ, OPA2333HKQ, and OPA2333JD - share identical 8-pin pinouts and electrical functionality. Differences are strictly mechanical (package size, thermal resistance, mounting style) and environmental (max temperature rating for JD variant). Therefore, OPA2333HD can be substituted for OPA2333HKJ or OPA2333HKQ on the same PCB footprint, provided thermal and qualification requirements are met.
OPA2333HD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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 ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2333HD FAQ
1.How can I place an order for OPA2333HD through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2333HD 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 OPA2333HD reliable?
The price and inventory of OPA2333HD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2333HD is usually 5 days.
3.What payment methods are accepted for OPA2333HD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2333HD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2333HD?
OPA2333HD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2333HD 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 OPA2333HD?
For technical support, including OPA2333HD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2333HD requirements.
6.How does Aetrix verify that OPA2333HD is sourced from the original manufacturer or authorized distributors?
All OPA2333HD 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 OPA2333HD meets industry standards.
7.What is the process for return or replacement of OPA2333HD?
All OPA2333HD units undergo pre-shipment inspection (PSI). If there is an issue with OPA2333HD, 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 OPA2333HD part is unused and in its original packaging.
Return procedure for OPA2333HD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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