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Texas Instruments OPA2333AIDG4
- Part No.:
- OPA2333AIDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2333AIDG4.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,718
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Product details
Overview
OPA2333AIDG4 from Texas Instruments is a dual-channel, zero-drift, rail-to-rail input/output CMOS operational amplifier optimized for precision, low-power, single-supply operation. It delivers 10 μV maximum offset voltage, 0.05 μV/°C maximum drift, and 17 μA quiescent current per amplifier across 1.8 V to 5.5 V supply, enabling high-accuracy signal conditioning in battery-powered medical sensors and portable instrumentation.
For engineers reviewing the OPA2333AIDG4 datasheet, OPA2333AIDG4 pinout, OPA2333AIDG4 application, or OPA2333AIDG4 equivalent, this page provides verified package mapping (VSSOP-8), validated dual-amplifier pin functions, confirmed thermal metrics (RθJA = 180.3°C/W), and real-world design implications of its auto-calibration architecture and rail-to-rail swing capability.
Technical Context
The OPA2333AIDG4 implements a proprietary time-continuous auto-calibration technique that corrects input offset every 8 μs using a 350-kHz internal amplifier-eliminating flicker noise and aliasing while maintaining unity-gain stability. Its zero-drift architecture achieves near-zero long-term drift without chopper-induced ripple or switching artifacts.
This dual op-amp features complementary metal-oxide-semiconductor (CMOS) inputs with 70 pA typical bias current, rail-to-rail input common-mode range extending 100 mV beyond both supply rails, and output swing within 50 mV of each rail at 10 kΩ load-enabling direct interfacing with 16-bit SAR ADCs and low-voltage microcontrollers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 10 μV max - ensures ≤0.002% gain error in 5 V full-scale precision current sensing |
| Drift vs Temperature | 0.05 μV/°C max - contributes <0.6 μV error over –40°C to +125°C industrial range |
| Quiescent Current | 17 μA per amplifier - enables continuous operation >1 year on a single CR2032 coin cell in handheld test gear |
| Supply Range | 1.8 V to 5.5 V - supports direct connection to Li-ion, 3.3 V LDOs, or USB-powered systems without level shifting |
| Input Common-Mode Range | (V–) – 0.1 V to (V+) + 0.1 V - allows accurate amplification of signals at ground or above V+ in single-supply configurations |
| Output Swing | Within 50 mV of rails - maintains linearity down to 50 mV above GND and below V+, critical for 12-bit+ resolution |
| Gain-Bandwidth Product | 350 kHz - sufficient for DC-coupled sensor interfaces and anti-aliasing filters up to ~35 kHz |
Pinout & Package
The OPA2333AIDG4 is housed in an 8-pin VSSOP (DGK) package measuring 3.0 mm × 3.0 mm with 0.65 mm pitch. The exposed thermal pad on the underside is electrically isolated and may be connected to V– or left floating per TI design guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | High-impedance CMOS node; accepts signals from transducers or resistive bridges without loading |
| –IN A (Pin 2) | Inverting input, Channel A | Used with feedback network to set closed-loop gain; sensitive to PCB leakage and thermoelectric effects |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail capable; drives ADC reference buffers or low-side current-sense amplifiers directly |
| V– (Pin 4) | Negative supply | Ground reference for single-supply operation; must be decoupled with 0.1 μF ceramic capacitor |
| V+ (Pin 8) | Positive supply | Accepts 1.8–5.5 V; requires local 0.1 μF decoupling to suppress PSRR degradation above 10 kHz |
| –IN B (Pin 6) | Inverting input, Channel B | Independent channel input; enables differential pair configuration or dual-path signal processing |
| +IN B (Pin 5) | Noninverting input, Channel B | Matches +IN A electrical characteristics; supports matched gain stages in ratiometric sensor systems |
| OUT B (Pin 7) | Output, Channel B | Electrically isolated from OUT A; allows simultaneous analog front-end processing without crosstalk |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-calibration | Eliminates 1/f noise and thermal drift accumulation-no external nulling required over lifetime |
| Rail-to-rail input & output | Enables full dynamic range utilization in 3.3 V systems; avoids signal clipping at supply boundaries |
| Ultra-low quiescent current | 17 μA per channel allows always-on monitoring in energy-harvesting nodes without duty cycling |
| High CMRR (130 dB typ) | Maintains accuracy in noisy industrial environments where common-mode interference exceeds 1 V |
| ESD robustness | ±4000 V HBM rating simplifies handling and board-level ESD protection design |
Applications
| Medical Instrumentation | Electronic Scales |
|---|---|
Use Scenario: Amplifying microvolt-level EEG or ECG signals from dry electrodes in portable diagnostic devices. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with sub-μV offset stability over body temperature variation. Use Value: Enables ≥90 dB SNR in 24-bit delta-sigma ADC acquisition without calibration drift between patient sessions. | Use Scenario: Conditioning bridge outputs from strain-gauge load cells in kitchen or industrial weighing platforms. IC Role / Device Role / Timing Role: Low-noise, zero-drift instrumentation amplifier front-end with matched dual channels for ratiometric excitation. Use Value: Delivers <±0.01% linearity error over 10:1 temperature range, eliminating factory recalibration cycles. |
| Battery-Powered Instruments | Temperature Measurements |
Use Scenario: Signal conditioning for thermistor or RTD interfaces in handheld multimeters and environmental loggers. IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage supporting simultaneous voltage/current measurement paths. Use Value: Achieves ±0.1°C accuracy from –40°C to +85°C using only passive component tolerance compensation. | Use Scenario: Linearizing and amplifying output from silicon bandgap or thermocouple sensors in HVAC controllers. IC Role / Device Role / Timing Role: High-PSRR, low-drift amplifier rejecting supply ripple from switching regulators powering the sensor chain. Use Value: Maintains <±0.05°C error despite 100 mVpp 1 MHz switching noise on 3.3 V rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333PDR | VSON-8 package (exposed thermal pad); RθJA = 46.7°C/W vs 180.3°C/W for VSSOP | Better thermal performance in high-density layouts; requires solder paste stencil optimization for thermal pad | Select when board space is constrained and junction temperature rise must stay <15°C at 2× full load |
| AD8628ARZ-REEL7 | Higher 1.1 μVPP 0.1–10 Hz noise vs 1.1 μVPP for OPA2333AIDG4; same 10 μV offset spec | Lower bandwidth (2.5 MHz GBW) limits use in fast-settling multiplexed data acquisition | Prefer for ultra-low-noise DC applications where 350 kHz GBW is sufficient and ADI ecosystem integration is prioritized |
Compared with OPA2333PDR, the OPA2333AIDG4 offers superior layout flexibility in standard VSSOP footprints but higher thermal resistance; versus AD8628ARZ-REEL7, it provides identical offset performance with lower cost and TI's production support for long-lifecycle industrial programs.
Availability
OPA2333AIDG4 is available at Aetrix Electronics and suitable for medical instrumentation, electronic scales, and battery-powered instruments requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA2333AIDG4 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The OPA2333AIDG4 belongs to TI's Zero-Drift Operational Amplifier product line, engineered specifically for high-accuracy, low-power signal conditioning in resource-constrained environments where offset drift and supply sensitivity degrade measurement fidelity.
FAQ
What is the maximum operating temperature range for the OPA2333AIDG4?
The OPA2333AIDG4 is fully specified from –40°C to +125°C ambient temperature, with absolute maximum junction temperature rated at 150°C. This range is validated across all electrical parameters in the SBOS351E datasheet, making OPA2333AIDG4 suitable for under-hood automotive sensor modules and industrial motor control enclosures where ambient temperatures exceed 85°C.
Does the OPA2333AIDG4 require external capacitors for stability?
No, the OPA2333AIDG4 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, located within 2 mm of the device, to maintain PSRR and prevent oscillation from power-supply impedance interactions-especially critical in battery-powered OPA2333AIDG4 designs.
Can the OPA2333AIDG4 drive capacitive loads directly?
The OPA2333AIDG4 can reliably drive up to 100 pF capacitive loads without external isolation resistance, as confirmed by Figure 15 in the SBOS351E datasheet. For loads exceeding 100 pF-such as ADC input sampling capacitors or long PCB traces-TI advises adding a 10 Ω to 50 Ω series resistor between OPA2333AIDG4 output and the load to ensure phase margin remains >45°.
How does the auto-calibration circuit in the OPA2333AIDG4 affect system noise?
The OPA2333AIDG4's auto-calibration eliminates 1/f (flicker) noise entirely, resulting in flat voltage noise spectral density from 0.1 Hz upward. Its 0.1–10 Hz integrated noise is 1.1 μVPP, measured directly at the output with no external filtering-making OPA2333AIDG4 ideal for DC-coupled precision measurements where low-frequency noise dominates total error budget.
Is the exposed thermal pad on the OPA2333AIDG4 VSSOP package electrically connected?
No, the exposed thermal pad on the OPA2333AIDG4 VSSOP package is electrically isolated from all internal circuitry. Per TI's SBOS351E datasheet Section 7.3.5, it may be soldered to a V– plane for improved thermal dissipation or left unconnected-no electrical connection is required or recommended for functional operation of the OPA2333AIDG4.
OPA2333AIDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2333AIDG4 FAQ
1.How can I place an order for OPA2333AIDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2333AIDG4 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 OPA2333AIDG4 reliable?
The price and inventory of OPA2333AIDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2333AIDG4 is usually 5 days.
3.What payment methods are accepted for OPA2333AIDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2333AIDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2333AIDG4?
OPA2333AIDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2333AIDG4 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 OPA2333AIDG4?
For technical support, including OPA2333AIDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2333AIDG4 requirements.
6.How does Aetrix verify that OPA2333AIDG4 is sourced from the original manufacturer or authorized distributors?
All OPA2333AIDG4 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 OPA2333AIDG4 meets industry standards.
7.What is the process for return or replacement of OPA2333AIDG4?
All OPA2333AIDG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2333AIDG4, 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 OPA2333AIDG4 part is unused and in its original packaging.
Return procedure for OPA2333AIDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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