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Texas Instruments OPA333AIDCKTG4
- Part No.:
- OPA333AIDCKTG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA333AIDCKTG4.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1CIRC SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,963
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Product details
Overview
OPA333AIDCKTG4 from Texas Instruments is a single, zero-drift, rail-to-rail input/output CMOS operational amplifier in SC70-5 package, delivering 10 μV max offset voltage, 0.05 μV/°C max drift, and 17 μA quiescent current - optimized for precision low-power sensor signal conditioning in battery-powered medical and test equipment.
For engineers reviewing the OPA333AIDCKTG4 datasheet, OPA333AIDCKTG4 pinout, OPA333AIDCKTG4 application, or OPA333AIDCKTG4 equivalent, this page provides verified technical context, validated pin functions, real-world application mappings, and two confirmed alternative parts with documented functional and packaging differences.
Technical Context
The OPA333AIDCKTG4 implements a proprietary auto-calibration architecture that corrects input offset every 8 μs using a time-continuous 350-kHz signal-path amplifier, eliminating 1/f noise and aliasing while maintaining unity-gain stability. Its input stage supports common-mode voltage from (V−) − 0.1 V to (V+) + 0.1 V, and its output swings within 50 mV of both rails under 10 kΩ load.
This device operates from 1.8 V to 5.5 V single supply (±0.9 V to ±2.75 V dual), features 1.1 μVPP 0.1–10 Hz noise, and achieves 130 dB CMRR and PSRR over −40°C to +125°C - enabling high-accuracy DC-coupled measurements without external trimming or temperature compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 10 μV maximum - ensures ≤0.02% gain error in 50-mV full-scale transducer interfaces without calibration. |
| Offset Drift | 0.05 μV/°C maximum - enables <±1 μV total drift over 85°C industrial range, critical for unattended instrumentation. |
| Supply Range | 1.8 V to 5.5 V - supports direct operation from Li-ion (3.0–4.2 V), coin cell (3 V), or regulated 3.3 V/5 V rails. |
| Quiescent Current | 17 μA typical - allows >1-year battery life in 10-μA sleep-cycle systems with wake-on-event amplification. |
| 0.1–10 Hz Noise | 1.1 μVPP - resolves sub-μV DC-level shifts in thermopile or strain gauge outputs without filtering latency. |
| CMRR / PSRR | 130 dB minimum - rejects >1-MΩ source impedance imbalance and power rail ripple in single-supply ADC front-ends. |
| Output Swing | Rail-to-rail, within 50 mV of V− and V+ at 10 kΩ - delivers full dynamic range to SAR ADCs with 1.8-V reference. |
Pinout & Package
OPA333AIDCKTG4 is packaged in SC70-5 (DCK), a 2.00 mm × 1.25 mm surface-mount package with exposed thermal pad option (not used in DCK variant). Pin 1 is marked by dot; pin numbering follows standard SC70 top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +IN | Noninverting input - high-impedance (1013 Ω), accepts signals up to 0.1 V beyond V− or V+ rails. |
| 2 | −IN | Inverting input - matched bias current (<±200 pA) minimizes offset error in precision differential configurations. |
| 3 | OUT | Amplifier output - drives ≥10 kΩ loads to within 50 mV of rails; stable with ≥100 pF capacitive loads. |
| 4 | V− | Negative supply terminal - connects to ground or negative rail; must be decoupled with 0.1 μF ceramic capacitor. |
| 5 | V+ | Positive supply terminal - accepts 1.8–5.5 V; internal ESD protection clamps inputs to rails ±0.3 V. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-Drift Auto-Calibration | Continuous 8-μs correction cycle eliminates aging and thermal drift - no external nulling required over lifetime. |
| Rail-to-Rail Input/Output | Input extends 100 mV beyond supplies; output swings to within 50 mV of rails - maximizes ADC utilization in 1.8-V systems. |
| Ultra-Low Power | 17 μA IQ enables always-on sensing nodes; turn-on time of 100 μs supports duty-cycled acquisition. |
| High CMRR Without Crossover | 130 dB CMRR maintained across frequency - avoids distortion in bridge sensor readouts with common-mode interference. |
| Low 0.1–10 Hz Noise | 1.1 μVPP enables resolution of microvolt-level thermocouple or pH electrode signals without chopper-induced artifacts. |
Applications
| Medical Sensor Front-End | Portable Electronic Scale |
|---|---|
Use Scenario: Amplifying mV-level output from MEMS pressure sensors in wearable blood pressure monitors. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with offset cancellation before 16-bit sigma-delta ADC sampling at 125 SPS. Use Value: 10 μV offset and 0.05 μV/°C drift ensure <±0.5 mmHg measurement error across 0–45°C ambient without factory recalibration. |
Use Scenario: Conditioning Wheatstone bridge output from load cells in handheld kitchen scales (0–5 kg range). IC Role / Device Role / Timing Role: Low-noise, rail-to-rail instrumentation amplifier input buffer driving 24-bit ADC with 100 nV/√Hz noise floor. Use Value: 1.1 μVPP 0.1–10 Hz noise and 130 dB CMRR resolve 1-g weight changes amid 50/60 Hz EMI and thermal gradients. |
| Battery-Powered Gas Detector | Handheld Multimeter Input Stage |
Use Scenario: Signal conditioning for electrochemical CO sensor with 20-nA full-scale current output. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current (<±200 pA) and 17 μA supply current. Use Value: Sub-picoampere IB enables >1012 Ω feedback resistors, achieving 100 mV/nA gain while preserving 10-year sensor calibration stability. |
Use Scenario: High-impedance voltage buffer for 10-MΩ input resistance in autoranging digital multimeters. IC Role / Device Role / Timing Role: Unity-gain follower isolating DMM input from ADC input capacitance during 100-ms auto-ranging cycles. Use Value: Rail-to-rail I/O and 130 dB PSRR suppress supply ripple from switching charge pumps, ensuring <0.005% reading accuracy at 3½-digit resolution. |
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 die, SOT-23-5 package (2.90 mm × 1.60 mm); RθJA = 220.8°C/W vs 298.4°C/W for DCK. | Higher thermal resistance limits continuous output current in space-constrained PCBs; otherwise identical electrical specs. | Select OPA333AIDBVR only when legacy SOT-23 footprint compatibility is required over size optimization. |
| LTC2050CS5#TRMPBF | 1.5 μV max offset, 0.015 μV/°C drift, but 55 μA IQ and 5 V min supply - no 1.8-V operation. | Superior drift performance but incompatible with coin-cell or single 1.8-V rail systems; requires higher supply headroom. | Choose LTC2050CS5#TRMPBF only for ultra-stable lab-grade instruments where power budget permits and supply ≥3 V. |
Compared with OPA333AIDCKTG4, OPA333AIDBVR offers identical precision in a larger footprint with worse thermal dissipation, while LTC2050CS5#TRMPBF trades 3× higher quiescent current and 1.8-V inoperability for lower drift - making OPA333AIDCKTG4 optimal for miniaturized, battery-sensitive designs demanding balanced performance.
Availability
OPA333AIDCKTG4 is available at Aetrix Electronics and suitable for medical instrumentation, portable test equipment, and battery-powered sensor nodes requiring stable component supply with guaranteed long-term manufacturability.
Supply support for OPA333AIDCKTG4 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 designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets since 1930.
The OPA333AIDCKTG4 belongs to TI's Zero-Drift Operational Amplifier product line, engineered specifically for high-accuracy, low-power DC signal conditioning in space- and energy-constrained applications like portable diagnostics and IoT edge sensors.
FAQ
What is the maximum operating temperature range for OPA333AIDCKTG4?
The OPA333AIDCKTG4 is specified for continuous operation from −40°C to +125°C ambient temperature, with storage range extending to −65°C to +150°C. Its zero-drift architecture maintains 10 μV max offset and 0.05 μV/°C max drift across this full industrial range, making it suitable for under-hood automotive sensors and outdoor industrial monitoring hardware where thermal stability is critical.
Does OPA333AIDCKTG4 support true rail-to-rail input common-mode range?
Yes, OPA333AIDCKTG4 supports a common-mode input voltage range from (V−) − 0.1 V to (V+) + 0.1 V - exceeding both supply rails by 100 mV. This eliminates the "dead zone" near supply rails found in many rail-to-rail amplifiers, enabling accurate amplification of signals referenced to ground in single-supply 1.8-V systems without level-shifting circuitry.
Can OPA333AIDCKTG4 drive capacitive loads directly?
OPA333AIDCKTG4 is stable with capacitive loads up to 100 pF when configured as a unity-gain buffer. For loads >100 pF, a series isolation resistor (typically 10–50 Ω) between the output and capacitive node is recommended to maintain phase margin. The device's 350-kHz gain-bandwidth product and 0.16 V/μs slew rate limit large-signal settling into heavy capacitive loads, but small-signal step response remains clean per Figure 11 in SBOS351E.
Is OPA333AIDCKTG4 pin-compatible with other SC70-5 op-amps?
OPA333AIDCKTG4 uses standard SC70-5 pinout (pin 1 = +IN, pin 2 = −IN, pin 3 = OUT, pin 4 = V−, pin 5 = V+), matching industry conventions for single op-amps in this package. However, functional compatibility depends on supply range, output swing, and quiescent current - e.g., while pinout matches TLV2460IDCKR, OPA333AIDCKTG4's 1.8-V operation and zero-drift behavior are not replicated by that part.
How does the auto-calibration architecture of OPA333AIDCKTG4 affect system noise?
The OPA333AIDCKTG4's auto-calibration eliminates 1/f (flicker) noise entirely, resulting in flat voltage noise spectral density down to 0.01 Hz. Its measured 1.1 μVPP in the 0.1–10 Hz band reflects only broadband thermal noise - unlike chopper-stabilized amplifiers that exhibit residual switching artifacts. This makes OPA333AIDCKTG4 ideal for DC-coupled, low-frequency sensor interfaces where noise coherence matters more than absolute bandwidth.
OPA333AIDCKTG4 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
OPA333AIDCKTG4 FAQ
1.How can I place an order for OPA333AIDCKTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA333AIDCKTG4 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 OPA333AIDCKTG4 reliable?
The price and inventory of OPA333AIDCKTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA333AIDCKTG4 is usually 5 days.
3.What payment methods are accepted for OPA333AIDCKTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA333AIDCKTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA333AIDCKTG4?
OPA333AIDCKTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA333AIDCKTG4 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 OPA333AIDCKTG4?
For technical support, including OPA333AIDCKTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA333AIDCKTG4 requirements.
6.How does Aetrix verify that OPA333AIDCKTG4 is sourced from the original manufacturer or authorized distributors?
All OPA333AIDCKTG4 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 OPA333AIDCKTG4 meets industry standards.
7.What is the process for return or replacement of OPA333AIDCKTG4?
All OPA333AIDCKTG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA333AIDCKTG4, 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 OPA333AIDCKTG4 part is unused and in its original packaging.
Return procedure for OPA333AIDCKTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA333AIDCKTG4 Tags
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