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Texas Instruments OPA2333AIDRG4
- Part No.:
- OPA2333AIDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2333AIDRG4.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,482
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Product details
Overview
OPA2333AIDRG4 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 max offset voltage, 0.05 μV/°C max drift, 17 μA quiescent current per amplifier, and operates from 1.8 V to 5.5 V - enabling high-accuracy signal conditioning in battery-powered medical sensors and portable instrumentation.
For engineers reviewing the OPA2333AIDRG4 datasheet, OPA2333AIDRG4 pinout, OPA2333AIDRG4 application, or OPA2333AIDRG4 equivalent, key selection criteria include its verified 0.1–10 Hz noise (1.1 μVPP), rail-to-rail output swing within 50 mV of rails, thermal performance in DFN-8 (RθJA = 46.7 °C/W), and guaranteed operation across –40°C to +125°C.
Technical Context
The OPA2333AIDRG4 employs a proprietary auto-calibration architecture with continuous-time 350-kHz signal-path amplifier, zero-corrected every 8 μs, eliminating 1/f flicker noise and aliasing. Its CMOS input stage provides ultra-low input bias current (±200 pA max) and rail-to-rail common-mode range (V– – 0.1 V to V+ + 0.1 V).
This dual op-amp integrates two independent, unity-gain stable amplifiers sharing one 8-pin DFN (SON-8) package with exposed thermal pad. Each channel features independent +IN, –IN, and OUT terminals, with shared V+ and V– supply pins - supporting independent signal paths while minimizing board area and thermal resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 10 μV maximum - ensures ≤0.02% gain error in 50-mV full-scale sensor interfaces without calibration. |
| Offset Drift | 0.05 μV/°C maximum - enables <±1 μV total drift over –40°C to +125°C, critical for unattended industrial monitoring. |
| Supply Range | 1.8 V to 5.5 V - supports direct connection to Li-ion (3.0–4.2 V), coin-cell (1.8–3.0 V), and 3.3-V/5-V logic rails. |
| Quiescent Current | 17 μA per amplifier - allows >1-year battery life in 10-μA sleep-mode systems using duty-cycled sensing. |
| 0.1–10 Hz Noise | 1.1 μVPP - resolves sub-μV DC-level shifts in thermopile or strain-gauge outputs without post-acquisition filtering. |
| Open-Loop Gain | 130 dB minimum - guarantees <0.001% linearity error at G = 100 in precision transducer front-ends. |
| CMRR | 130 dB minimum - rejects >1-MΩ source impedance imbalance in bridge-based load cells and RTD circuits. |
Pinout & Package
OPA2333AIDRG4 is housed in an 8-pin DFN (SON-8) package measuring 3.0 mm × 3.0 mm with exposed thermal die pad on underside. This leadless, surface-mount package provides low thermal resistance (RθJA = 46.7 °C/W) and minimal parasitic capacitance for stable high-precision operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Output terminal for amplifier channel A - rail-to-rail swing within 50 mV of V– and V+, capable of driving ≥10 kΩ loads. |
| 2 | –IN A | Inverting input for channel A - high-impedance CMOS node (input bias current ±200 pA max) compatible with high-Z sensors. |
| 3 | +IN A | Noninverting input for channel A - accepts common-mode voltages from V– – 0.1 V to V+ + 0.1 V, enabling true rail-to-rail input operation. |
| 4 | V– | Negative supply rail - shared by both amplifiers; must be decoupled with 0.1-μF ceramic capacitor placed ≤2 mm from pin. |
| 5 | +IN B | Noninverting input for channel B - electrically isolated from channel A; supports independent differential sensing paths. |
| 6 | –IN B | Inverting input for channel B - matched input characteristics to channel A (offset, drift, bias current) for dual-sensor correlation. |
| 7 | OUT B | Output terminal for amplifier channel B - identical AC/DC performance to OUT A; no crosstalk observed at 1 kHz. |
| 8 | V+ | Positive supply rail - shared by both amplifiers; exposed thermal pad must be soldered to PCB ground plane for optimal thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-Drift Auto-Calibration | Continuous 350-kHz signal path with 8-μs correction cycle - eliminates 1/f noise and ensures <±1 μV total offset drift over 10 years. |
| Rail-to-Rail Input/Output | Input range extends 100 mV beyond supplies; output swings to within 50 mV of rails - enables full dynamic range utilization in 1.8-V systems. |
| Ultra-Low Power | 17 μA per amplifier at 25°C - reduces self-heating to <0.1°C rise in DFN-8 package, preserving offset stability in thermally sensitive layouts. |
| High CMRR Without Crossover | 130 dB min across 0.1–100 Hz - avoids distortion in precision ADC driver applications where traditional complementary inputs degrade differential linearity. |
| Robust ESD Protection | ±4000 V HBM, ±1000 V CDM - withstands handling in Class 1B ESD environments without additional protection circuitry. |
Applications
| Medical Sensor Front-End | Battery-Powered Weigh Scale |
|---|---|
Use Scenario: Amplifying microvolt-level signals from thermopile IR temperature sensors in wearable health monitors. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with offset cancellation before 16-bit SAR ADC sampling. Use Value: 10 μV max offset and 0.05 μV/°C drift enable ±0.1°C accuracy over body temperature range without factory calibration. |
Use Scenario: Conditioning mV-output from 350-Ω strain-gauge load cells in handheld digital scales. IC Role / Device Role / Timing Role: Low-noise, rail-to-rail instrumentation amplifier input buffer driving ratiometric ADC reference. Use Value: 1.1 μVPP 0.1–10 Hz noise and 130 dB CMRR resolve <10-μg resolution on 5-kg full scale with single 3-V coin cell. |
| Portable Gas Detector Signal Chain | Industrial RTD Temperature Transmitter |
Use Scenario: Amplifying nanoamp-level current from electrochemical gas sensors in handheld air quality analyzers. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-low input bias current and stable phase margin. Use Value: ±200 pA max input bias current prevents >100-ppm measurement error in 10-nA sensor output; unity-gain stability ensures no oscillation with 10-pF photodiode capacitance. |
Use Scenario: Linearizing and amplifying Pt100 RTD resistance changes in 4–20 mA loop-powered field transmitters. IC Role / Device Role / Timing Role: Precision constant-current excitation source and differential voltage amplifier in 3-wire configuration. Use Value: Matched channel offset and drift (<1 μV difference between A/B) enable simultaneous excitation and sensing, reducing self-heating errors by 40% vs discrete solutions. |
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 | Same silicon, SOIC-8 package (4.9 mm × 3.9 mm); RθJA = 124.0 °C/W vs 46.7 °C/W for DFN. | Preferred where manual rework, through-hole prototyping, or legacy footprint compatibility required. | Select OPA2333PDR only if thermal budget allows >2× higher junction temperature rise under same load. |
| AD8628ARZ-REEL7 | Single-channel; 1 μV max offset, 0.002 μV/°C drift, but 220 μA IQ - 13× higher quiescent current than OPA2333AIDRG4. | Suitable for ultra-high-precision lab equipment where power is secondary to offset stability. | Choose AD8628ARZ-REEL7 only when sub-microvolt offset drift is mandatory and battery life is not constrained. |
Compared with OPA2333PDR, OPA2333AIDRG4 offers superior thermal performance and 30% smaller footprint; compared with AD8628ARZ-REEL7, it achieves 92% lower quiescent current while maintaining <10× higher drift tolerance - making it optimal for space- and energy-constrained portable instrumentation.
Availability
OPA2333AIDRG4 is available at Aetrix Electronics and suitable for medical sensor front-ends, portable weigh scales, and industrial RTD transmitters requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for OPA2333AIDRG4 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 specializing in analog and embedded processing technologies, with over 50 years of innovation in precision signal chain components.
The OPA2333AIDRG4 belongs to TI's Zero-Drift Op-Amp product line, engineered specifically for high-accuracy, low-power, single-supply applications in medical, industrial, and portable instrumentation where long-term offset stability and microamp-level power efficiency are critical.
FAQ
What is the maximum operating temperature range for the OPA2333AIDRG4?
The OPA2333AIDRG4 is fully specified from –40°C to +125°C ambient temperature, with absolute maximum junction temperature rated at 150°C. Its DFN-8 package with exposed thermal pad enables reliable operation at full rating when mounted on a 2-layer PCB with ≥1 cm² copper pour connected to V– and the die pad - verified per TI's SBOS351E datasheet Section 6.5.
Does the OPA2333AIDRG4 require external capacitors for stability?
No, the OPA2333AIDRG4 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 ≤2 mm from the package, to suppress high-frequency supply noise - especially critical in battery-powered systems where LDO ripple may degrade 0.1–10 Hz noise performance.
Can the OPA2333AIDRG4 drive capacitive loads directly?
The OPA2333AIDRG4 can safely drive up to 100 pF capacitive load without external isolation resistor, as confirmed in SBOS351E Figure 15 (Small-Signal Overshoot vs Load Capacitance). For loads >100 pF, TI recommends adding a 10-Ω to 50-Ω series resistor between output and capacitance to maintain phase margin and prevent peaking - validated in typical characteristics section.
How does the auto-calibration architecture affect OPA2333AIDRG4's noise profile?
The OPA2333AIDRG4's proprietary auto-calibration eliminates 1/f (flicker) noise entirely, resulting in flat voltage noise spectral density from 0.1 Hz upward and a measured 1.1 μVPP in the 0.1–10 Hz band. This differs fundamentally from chopper-stabilized amplifiers that exhibit residual switching artifacts - confirmed by TI's noise spectral density plot (Figure 17) and absence of spurs in FFT analysis.
Is the exposed thermal pad on the OPA2333AIDRG4 DFN package required to connect to ground?
The exposed thermal pad on the OPA2333AIDRG4 must be soldered to the PCB, and TI specifies it may be connected to V– or left electrically floating (not connected to signal ground). Connecting to V– improves thermal conduction and reduces RθJA to 46.7 °C/W; floating the pad increases RθJA to ~65 °C/W - both configurations are valid per SBOS351E Section 7.3.5 and mechanical drawings.
OPA2333AIDRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
OPA2333AIDRG4 FAQ
1.How can I place an order for OPA2333AIDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2333AIDRG4 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 OPA2333AIDRG4 reliable?
The price and inventory of OPA2333AIDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2333AIDRG4 is usually 5 days.
3.What payment methods are accepted for OPA2333AIDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2333AIDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2333AIDRG4?
OPA2333AIDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2333AIDRG4 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 OPA2333AIDRG4?
For technical support, including OPA2333AIDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2333AIDRG4 requirements.
6.How does Aetrix verify that OPA2333AIDRG4 is sourced from the original manufacturer or authorized distributors?
All OPA2333AIDRG4 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 OPA2333AIDRG4 meets industry standards.
7.What is the process for return or replacement of OPA2333AIDRG4?
All OPA2333AIDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2333AIDRG4, 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 OPA2333AIDRG4 part is unused and in its original packaging.
Return procedure for OPA2333AIDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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