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Texas Instruments OPA333AIDBVR
- Part No.:
- OPA333AIDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA333AIDBVR.pdf
- Description:
- IC OPAMP ZER-DRIFT 1CIRC SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:12,114
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Product details
Overview
OPA333AIDBVR from Texas Instruments is a single, zero-drift CMOS operational amplifier in SOT-23-5 package, delivering 10 μV max offset voltage, 0.05 μV/°C max drift, and 17 μA quiescent current. It operates from 1.8 V to 5.5 V with rail-to-rail input/output, enabling precision signal conditioning in battery-powered medical sensors and weigh-scale front-ends.
For engineers reviewing the OPA333AIDBVR datasheet, OPA333AIDBVR pinout, OPA333AIDBVR application, or OPA333AIDBVR equivalent, this page provides verified pin functions, thermal metrics for SOT-23-5, real-world noise performance (1.1 μVPP, 0.1–10 Hz), supply rejection (≥106 dB), and validated alternatives for low-drift, micro-power op-amp selection.
Technical Context
The OPA333AIDBVR employs a proprietary auto-calibration architecture that corrects input offset every 8 μs using a continuous-time 350-kHz core amplifier-eliminating flicker 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 output swings within 50 mV of both rails under 10 kΩ load.
This architecture enables true dc precision without phase reversal, even during rail-to-rail input transitions. The device achieves 130 dB open-loop gain and 106 dB CMRR over −40°C to +125°C, making it suitable for high-resolution ADC driver stages where differential linearity must be preserved.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 10 μV maximum - ensures ≤0.02% full-scale error in 50-mV sensor outputs without trimming. |
| Offset Drift | 0.05 μV/°C maximum - contributes <0.6 μV error over 125°C industrial range, critical for uncalibrated temperature measurement. |
| 0.1–10 Hz Noise | 1.1 μVPP - enables sub-16-bit effective resolution in slow-sampling instrumentation (e.g., digital multimeters). |
| Quiescent Current | 17 μA typical - supports >1-year battery life in coin-cell-powered handheld test equipment. |
| Supply Range | 1.8 V to 5.5 V - compatible with single Li-ion, two alkaline, or regulated 3.3 V/5 V rails without level-shifting. |
| CMRR | 130 dB typical - rejects >10⁶× common-mode interference in bridge sensor interfaces with mismatched traces. |
| GBW | 350 kHz - sufficient for closed-loop gains up to 35 with 10 kHz signal bandwidth in anti-aliasing filters. |
Pinout & Package
SOT-23-5 package (2.90 mm × 1.60 mm body size) with exposed pad not present; thermal resistance RθJA = 220.8°C/W, RθJB = 61.7°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Output | Rail-to-rail output capable of sourcing/sinking ≥30 mA; swings within 50 mV of V+ and V− under 10 kΩ load. |
| 2 - IN− | Inverting Input | High-impedance CMOS node (±200 pA bias current); accepts signals up to 0.1 V beyond supply rails with current limiting. |
| 3 - IN+ | Noninverting Input | Matched to IN− for optimal CMRR; same voltage range and bias current spec as IN−. |
| 4 - V− | Negative Supply | Lowest potential rail; connects to ground or negative supply; die pad (if present) must tie to V− or float. |
| 5 - V+ | Positive Supply | Highest potential rail; requires local 0.1-μF ceramic decoupling; absolute max 7 V. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-Drift Auto-Calibration | Continuous 8-μs correction cycle eliminates 1/f noise and guarantees ≤0.05 μV/°C drift without external components. |
| Rail-to-Rail Input/Output | Input common-mode extends 100 mV beyond rails; output swings to within 50 mV of both rails - enables full dynamic range utilization with single-supply ADCs. |
| Ultra-Low Power | 17 μA quiescent current per amplifier allows integration into always-on sensor nodes without compromising battery life. |
| High PSRR & CMRR | ≥106 dB over −40°C to +125°C ensures stable gain in noisy industrial environments with shared power domains. |
| Unity-Gain Stable | No external compensation required; drives capacitive loads up to 100 pF directly - simplifies filter design in sensor signal chains. |
Applications
| Electronic Scales | Medical Instrumentation |
|---|---|
Use Scenario: Amplifying mV-level output from strain-gauge bridges in portable weighing devices. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with <10 μV offset to preserve 24-bit ADC resolution. Use Value: Enables ±0.005% full-scale accuracy without factory calibration, reducing BOM cost and test time. |
Use Scenario: Front-end amplification of ECG electrode signals in wearable heart monitors. IC Role / Device Role / Timing Role: Low-noise, low-drift buffer driving SAR ADC with 1.1 μVPP integrated noise. Use Value: Maintains diagnostic-grade signal fidelity across body temperature variations (35–42°C) without recalibration. |
| Battery-Powered Instruments | Temperature Measurements |
Use Scenario: Signal conditioning for thermistor or RTD interfaces in handheld DMMs. IC Role / Device Role / Timing Role: Rail-to-rail I/O amplifier operating from 2×AA batteries (3 V) with 17 μA supply current. Use Value: Extends battery life beyond 12 months while supporting 0.1°C resolution over −20°C to +85°C. |
Use Scenario: Cold-junction compensation in thermocouple measurement systems. IC Role / Device Role / Timing Role: Precision voltage follower buffering Pt1000 sensor output with 0.05 μV/°C drift. Use Value: Reduces cold-junction error contribution to <0.02°C over full industrial temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision, micro-power operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP6V81T-E/OT | 15 μV max offset, 0.15 μV/°C drift, 650 kHz GBW, 650 nA IB - higher drift and bias current than OPA333AIDBVR. | Less suitable for sub-μV dc stability requirements (e.g., high-precision weigh scales); better for higher-speed sensor interfaces. | Select when >500 kHz bandwidth is needed and 0.15 μV/°C drift is acceptable for the application's temperature span. |
| LTC2050CS5#TRMPBF | 5 μV max offset, 0.03 μV/°C drift, 3 μA IQ, SOIC-8 only - lower drift but 180× higher quiescent current than OPA333AIDBVR. | Not viable for coin-cell or multi-year battery operation; preferred in mains-powered lab equipment demanding ultra-low drift. | Choose when ultimate dc precision outweighs power constraints and SOT-23-5 footprint is not required. |
Compared with MCP6V81T-E/OT and LTC2050CS5#TRMPBF, the OPA333AIDBVR uniquely balances ultra-low drift (0.05 μV/°C), micro-power operation (17 μA), and SOT-23-5 space efficiency - making it optimal for portable, battery-constrained instrumentation requiring long-term dc accuracy without calibration.
Availability
OPA333AIDBVR is available at Aetrix Electronics and suitable for electronic scales, medical instrumentation, battery-powered instruments, and temperature measurements requiring stable component supply across extended production lifecycles.
Supply support for OPA333AIDBVR 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 designing analog ICs, embedded processors, and system solutions for industrial, automotive, and personal electronics markets.
The OPA333AIDBVR belongs to TI's Zero-Drift Series - engineered specifically for high-accuracy, low-power signal conditioning in sensor interfaces, precision measurement, and portable instrumentation where dc stability and battery life are critical.
FAQ
What is the maximum supply voltage rating for OPA333AIDBVR?
The OPA333AIDBVR has an absolute maximum supply voltage of 7 V. Operation above this level risks permanent damage. The recommended operating range is 1.8 V to 5.5 V, with full electrical specifications guaranteed across −40°C to +125°C ambient temperature. Exceeding 7 V violates the device's internal ESD protection structure and may degrade long-term reliability.
Does OPA333AIDBVR require external capacitors for stability?
No, the OPA333AIDBVR is unity-gain stable and does not require external compensation capacitors. It safely drives capacitive loads up to 100 pF directly. However, a 0.1-μF ceramic decoupling capacitor is mandatory between V+ and V− pins, placed as close as possible to the SOT-23-5 package, to suppress high-frequency supply noise and ensure robust operation in noisy environments.
Can OPA333AIDBVR operate with input voltages beyond its supply rails?
Yes - the OPA333AIDBVR supports rail-to-rail input with a common-mode range extending 0.1 V beyond both V+ and V−. Input voltages exceeding the rails by more than 0.1 V must be current-limited to ≤10 mA using series resistors to prevent damage to internal ESD diodes. This capability enables direct interfacing with overvoltage-tolerant sensors without level-shifting circuitry.
What is the thermal performance of OPA333AIDBVR in SOT-23-5 package?
In the SOT-23-5 (DBV) package, the OPA333AIDBVR has a junction-to-ambient thermal resistance (RθJA) of 220.8°C/W and junction-to-board (RθJB) of 61.7°C/W. These values assume standard JEDEC 2-layer board layout. For continuous 17 μA operation, self-heating is negligible (<0.004°C), but PCB copper area under the package significantly impacts thermal rise in higher-power configurations.
How does the auto-calibration architecture of OPA333AIDBVR affect noise performance?
The OPA333AIDBVR's auto-calibration eliminates 1/f (flicker) noise, resulting in flat voltage noise spectral density beyond 0.1 Hz. Its 0.1–10 Hz integrated noise is specified at 1.1 μVPP - a direct consequence of the chopping-correction technique. Unlike chopper-stabilized amplifiers with switching artifacts, this architecture produces no aliasing or spurs, preserving signal integrity in precision dc and low-frequency ac applications.
OPA333AIDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- SOT-23-5
OPA333AIDBVR FAQ
1.How can I place an order for OPA333AIDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA333AIDBVR 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 OPA333AIDBVR reliable?
The price and inventory of OPA333AIDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA333AIDBVR is usually 5 days.
3.What payment methods are accepted for OPA333AIDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA333AIDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA333AIDBVR?
OPA333AIDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA333AIDBVR 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 OPA333AIDBVR?
For technical support, including OPA333AIDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA333AIDBVR requirements.
6.How does Aetrix verify that OPA333AIDBVR is sourced from the original manufacturer or authorized distributors?
All OPA333AIDBVR 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 OPA333AIDBVR meets industry standards.
7.What is the process for return or replacement of OPA333AIDBVR?
All OPA333AIDBVR units undergo pre-shipment inspection (PSI). If there is an issue with OPA333AIDBVR, 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 OPA333AIDBVR part is unused and in its original packaging.
Return procedure for OPA333AIDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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