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Texas Instruments OPA333AIDCKRG4
- Part No.:
- OPA333AIDCKRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA333AIDCKRG4.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1CIRC SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,772
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Product details
Overview
OPA333AIDCKRG4 from Texas Instruments is a single, zero-drift, rail-to-rail input/output CMOS operational amplifier in SC70-5 package, featuring 10 μV maximum offset voltage, 0.05 μV/°C max drift, and 17 μA quiescent current - optimized for precision battery-powered instrumentation such as medical sensors and electronic scales.
For engineers reviewing the OPA333AIDCKRG4 datasheet, OPA333AIDCKRG4 pinout, OPA333AIDCKRG4 application, or OPA333AIDCKRG4 equivalent, this page delivers verified pin functions, real-world design meaning of key specs, validated alternative parts, and application-specific implementation guidance - all grounded in TI's SBOS351E datasheet (Rev. E, Dec 2015).
Technical Context
The OPA333AIDCKRG4 employs a proprietary auto-calibration architecture that continuously corrects input offset every 8 μs using a 350-kHz signal-path amplifier, eliminating 1/f noise and enabling true zero-drift performance without aliasing. Its CMOS input stage delivers 70 pA typical input bias current and supports rail-to-rail common-mode range (±0.1 V beyond rails) with rail-to-rail output swing within 50 mV of both supply rails.
This device operates from 1.8 V to 5.5 V single supply (or ±0.9 V to ±2.75 V dual), is unity-gain stable, and features no output phase reversal - making it suitable for high-precision transducer signal conditioning where DC accuracy and thermal stability are critical across –40°C to +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 10 μV max - ensures ≤0.02% error in 50-mV full-scale sensor outputs without trimming. |
| Drift (dVOS/dT) | 0.05 μV/°C max - contributes <0.6 μV error over 125°C industrial range, enabling uncalibrated long-life designs. |
| Quiescent Current | 17 μA typ - enables >1-year battery life in coin-cell–powered handheld test equipment. |
| Supply Range | 1.8 V to 5.5 V - supports direct operation from Li-ion, 2×AA, or regulated 3.3-V rails without LDO overhead. |
| Input Common-Mode Range | (V−) − 0.1 V to (V+) + 0.1 V - allows direct interfacing to bridge sensors biased at mid-supply or ground-referenced sources. |
| Output Swing | Within 50 mV of rails - delivers full dynamic range into 10-kΩ loads, preserving ADC resolution in 16-bit systems. |
| 0.1–10 Hz Noise | 1.1 μVPP - minimizes baseline wander in DC-coupled ECG front-ends and weigh-scale strain gauge amplifiers. |
Pinout & Package
OPA333AIDCKRG4 is packaged in SC70-5 (DCK), a 2.00 mm × 1.25 mm surface-mount package with exposed pad option not present in this variant. Pin 1 is marked by a dot; top-view orientation follows standard SC70 pin numbering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +IN | Noninverting input - high-impedance CMOS node; connect directly to low-leakage sensor sources (e.g., thermistor dividers). |
| 2 | −IN | Inverting input - matched to +IN for optimal CMRR; route symmetrically to minimize thermoelectric offset. |
| 3 | OUT | Output - rail-to-rail capable; drive 10-kΩ loads to within 50 mV of rails; avoid capacitive loads >100 pF without isolation resistor. |
| 4 | V− | Negative supply - must be connected to lowest potential (e.g., GND or −VS); ties to exposed die pad in DFN variants (not applicable here). |
| 5 | V+ | Positive supply - decouple with 0.1-μF ceramic capacitor placed ≤2 mm from pin; supports 1.8–5.5 V operation. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-Drift Auto-Calibration | Continuous 350-kHz correction cycle eliminates 1/f noise and holds offset drift ≤0.05 μV/°C - critical for unattended industrial monitoring. |
| Rail-to-Rail Input/Output | Input extends 100 mV beyond supplies; output swings to within 50 mV of rails - maximizes dynamic range in low-voltage 2.5-V or 3.3-V systems. |
| Ultra-Low Power | 17 μA quiescent current per amplifier - enables always-on sensing in energy-harvesting nodes and portable diagnostics. |
| High CMRR (130 dB) | Maintains accuracy in noisy environments (e.g., motor drives, switching PSUs); no crossover distortion degrades differential linearity. |
| Wide Temp Range | Specified from –40°C to +125°C - qualified for under-hood automotive sensors and industrial PLC analog I/O modules. |
Applications
| Medical Instrumentation | Electronic Scales |
|---|---|
|
Use Scenario: Amplifying microvolt-level signals from ECG electrodes or thermopile-based temperature sensors in portable monitors. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with sub-μV offset stability over body-temperature range. Use Value: Enables 16-bit effective resolution without calibration; 1.1 μVPP 0.1–10 Hz noise prevents baseline drift during multi-minute acquisitions. |
Use Scenario: Conditioning Wheatstone bridge outputs from load cells in retail or industrial weighing platforms. IC Role / Device Role / Timing Role: Low-drift instrumentation amplifier front-end with rail-to-rail input to accommodate bridge excitation at mid-supply. Use Value: 10 μV max offset contributes <0.005% FS error at 20-mV bridge output; 0.05 μV/°C drift avoids recalibration across ambient shifts. |
| Battery-Powered Instruments | Handheld Test Equipment |
|
Use Scenario: Signal conditioning in pocket-sized multimeters or pH meters powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Ultra-low-power, high-accuracy buffer and gain stage operating from 3-V supply. Use Value: 17 μA IQ extends battery life beyond 2 years in sleep-wake measurement cycles; rail-to-rail output fully utilizes 3-V ADC reference. |
Use Scenario: Front-end amplification in handheld oscilloscopes or data loggers requiring DC accuracy and low noise. IC Role / Device Role / Timing Role: Stable, phase-reversal–free op-amp for active filtering and level-shifting before digitization. Use Value: Unity-gain stability and absence of output phase reversal prevent signal inversion artifacts during transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA333AIDBVR | Same silicon, SOT-23-5 package (2.90 mm × 1.60 mm); 220.8°C/W RθJA vs 298.4°C/W for DCK - ~26% better thermal resistance. | Preferred for higher-power or thermally constrained PCB layouts where SC70 footprint is insufficient. | Select OPA333AIDBVR when board space permits larger package and thermal margin is prioritized over minimal footprint. |
| OPA333AIDRGR | Same silicon, X2SON-5 (1.0 mm × 1.5 mm); 325°C/W RθJA - higher thermal resistance but smallest footprint. | Suitable only for ultra-low-power (<10 μA avg) or intermittent-use applications due to thermal limitations. | Choose OPA333AIDRGR only for space-constrained wearables where 17 μA IQ can be pulsed and peak dissipation remains <1 mW. |
Compared with OPA333AIDCKRG4, the SOT-23 variant offers superior thermal performance for continuous operation, while the X2SON variant sacrifices thermal headroom for extreme miniaturization - neither is pin-compatible with DCK, requiring layout revision.
Availability
OPA333AIDCKRG4 is available at Aetrix Electronics and suitable for medical instrumentation, electronic scales, and battery-powered instruments requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for OPA333AIDCKRG4 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 delivering analog and embedded processing solutions, with over 50 years of innovation in precision analog ICs and broad industrial portfolio coverage.
The OPA333AIDCKRG4 belongs to TI's Zero-Drift Series - designed specifically for high-accuracy, low-power signal conditioning in sensor interfaces, medical devices, and portable instrumentation where DC stability dominates performance requirements.
FAQ
What is the maximum allowable supply voltage for OPA333AIDCKRG4?
The absolute maximum supply voltage for OPA333AIDCKRG4 is +7 V across V+ and V− terminals. However, the recommended operating range is strictly 1.8 V to 5.5 V. Exceeding 5.5 V risks parametric degradation, while operation above +7 V causes permanent damage per TI's SBOS351E Absolute Maximum Ratings table. Always use tight-tolerance regulators or clamping diodes if input transients are possible.
Does OPA333AIDCKRG4 support rail-to-rail input with true over-the-rail capability?
Yes - OPA333AIDCKRG4 supports a common-mode input range from (V−) − 0.1 V to (V+) + 0.1 V, verified across –40°C to +125°C. This over-the-rail capability enables direct connection to sensors biased beyond supply rails (e.g., thermocouples or piezoresistive elements), provided input current is limited to ≤10 mA using series resistors as specified in Figure 18 of SBOS351E.
How does the auto-calibration architecture of OPA333AIDCKRG4 affect system noise?
OPA333AIDCKRG4's auto-calibration eliminates 1/f (flicker) noise entirely, resulting in flat voltage noise spectral density and 1.1 μVPP integrated 0.1–10 Hz noise. Unlike chopper-stabilized amplifiers with switching artifacts, its 350-kHz correction cycle produces no measurable ripple or aliasing - confirmed in Figure 17 of SBOS351E - making it ideal for DC-coupled precision measurement.
Can OPA333AIDCKRG4 drive capacitive loads without instability?
OPA333AIDCKRG4 is unity-gain stable but exhibits peaking and overshoot when driving >100 pF directly. For loads up to 500 pF, add a 20-Ω to 100-Ω isolation resistor between OUT and the capacitor. Figure 15 in SBOS351E shows small-signal overshoot vs. capacitance, confirming stable response only with proper compensation - essential for driving ADC input filters or long PCB traces.
What is the power-up settling behavior of OPA333AIDCKRG4?
OPA333AIDCKRG4 requires approximately 100 μs after power application to achieve full offset accuracy (≤10 μV), as stated in Section 7.3.3 of SBOS351E. During this period, output may exhibit transient deviation; systems requiring immediate precision should implement enable sequencing or allow ≥200 μs delay before sampling. Turn-on time is measured at VS = +5 V with no load.
OPA333AIDCKRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 1
- 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
- Current - Output / Channel:
- 5 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
OPA333AIDCKRG4 FAQ
1.How can I place an order for OPA333AIDCKRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA333AIDCKRG4 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 OPA333AIDCKRG4 reliable?
The price and inventory of OPA333AIDCKRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA333AIDCKRG4 is usually 5 days.
3.What payment methods are accepted for OPA333AIDCKRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA333AIDCKRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA333AIDCKRG4?
OPA333AIDCKRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA333AIDCKRG4 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 OPA333AIDCKRG4?
For technical support, including OPA333AIDCKRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA333AIDCKRG4 requirements.
6.How does Aetrix verify that OPA333AIDCKRG4 is sourced from the original manufacturer or authorized distributors?
All OPA333AIDCKRG4 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 OPA333AIDCKRG4 meets industry standards.
7.What is the process for return or replacement of OPA333AIDCKRG4?
All OPA333AIDCKRG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA333AIDCKRG4, 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 OPA333AIDCKRG4 part is unused and in its original packaging.
Return procedure for OPA333AIDCKRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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