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Texas Instruments OPA2333AIDRBT
- Part No.:
- OPA2333AIDRBT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
OPA2333AIDRBT.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:1,275
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Product details
Overview
OPA2333AIDRBT from Texas Instruments is a dual-channel, zero-drift, rail-to-rail input/output CMOS operational amplifier optimized for precision low-voltage 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 electronic scales.
For engineers reviewing the OPA2333AIDRBT datasheet, OPA2333AIDRBT pinout, OPA2333AIDRBT application, or OPA2333AIDRBT equivalent, this page provides verified package mapping (DRB - DFN-8 with exposed thermal pad), validated dual-amplifier pin functions, confirmed 0.1–10 Hz noise (1.1 μVPP), rail-to-rail I/O behavior, and real-world use cases including transducer front-ends and ADC driver stages requiring sub-μV DC stability.
Technical Context
The OPA2333AIDRBT employs a proprietary auto-calibration architecture that continuously corrects input offset every 8 μs using a 350-kHz auxiliary amplifier, eliminating 1/f noise and achieving near-zero drift without output phase reversal. Its CMOS input stage delivers ±70 pA typical bias current and supports common-mode voltage from (V−) − 0.1 V to (V+) + 0.1 V.
This dual op-amp is unity-gain stable and features an output stage capable of swinging within 50 mV of both rails under 10 kΩ load; it operates over −40°C to +125°C and is characterized for thermal performance in the DRB package with RθJA = 46.7°C/W and RθJC(bot) = 10.3°C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 10 μV max - ensures ≤0.02% gain error in 50-mV full-scale sensor interfaces |
| Drift vs Temperature | 0.05 μV/°C max - enables stable DC accuracy over industrial temperature range without recalibration |
| 0.1–10 Hz Noise | 1.1 μVPP - supports high-resolution measurement of slow-varying signals like thermocouple outputs |
| Supply Voltage Range | 1.8 V to 5.5 V - allows direct interface with Li-ion, coin-cell, and 3.3 V/5 V logic systems |
| Quiescent Current | 17 μA per amplifier - extends battery life in handheld test equipment and portable instrumentation |
| Input Common-Mode Range | (V−) − 0.1 V to (V+) + 0.1 V - enables true rail-to-rail sensing in single-supply configurations |
| Output Swing | Within 50 mV of rails at 10 kΩ - maintains linearity in driving SAR ADC reference buffers and precision DAC outputs |
Pinout & Package
OPA2333AIDRBT is housed in an 8-pin DFN package (DRB), 3.0 mm × 3.0 mm, with an exposed thermal die pad on the underside for enhanced heat dissipation and low-inductance grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load or feedback network; rail-to-rail swing capability critical for DAC buffer applications |
| 2 | −IN A | Inverting input, channel A - connects to feedback resistor in transimpedance or inverting gain configurations |
| 3 | +IN A | Noninverting input, channel A - accepts high-impedance sensor signals (e.g., bridge transducers) with minimal loading |
| 4 | V− | Negative supply terminal - must be connected to system ground or negative rail; exposed pad recommended tied to V− |
| 5 | +IN B | Noninverting input, channel B - enables independent signal conditioning path for dual-sensor systems or differential pair processing |
| 6 | −IN B | Inverting input, channel B - used for matched gain-setting or common-mode rejection in instrumentation topologies |
| 7 | OUT B | Amplifier B output - supports simultaneous dual-channel acquisition (e.g., active filter + buffer in same footprint) |
| 8 | V+ | Positive supply terminal - accepts 1.8–5.5 V; requires local 0.1 μF decoupling to minimize PSRR degradation |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-calibration | Continuous 8-μs correction cycle eliminates 1/f noise and ensures <0.1 μV long-term drift over 300 hours at 150°C |
| Rail-to-rail input/output | Supports full dynamic range utilization in 1.8 V single-supply systems - e.g., 0–1.8 V input and output swing |
| Ultra-low quiescent current | 17 μA per amplifier enables >10-year battery life in CO detectors and portable ECG front-ends |
| High CMRR & PSRR | 130 dB CMRR and 130 dB PSRR minimize error from supply ripple and common-mode interference in noisy environments |
| Thermal pad integration | Exposed die pad in DRB package reduces junction-to-board thermal resistance to 22.2°C/W - critical for sustained 125°C operation |
Applications
| Transducer Signal Conditioning | Medical Instrumentation Front-End |
|---|---|
Use Scenario: Amplifying low-level mV-range outputs from strain gauges, load cells, or pressure sensors in electronic scales. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with sub-μV offset to preserve resolution in 24-bit ΣΔ ADC interfaces. Use Value: 10 μV max VOS and 0.05 μV/°C drift prevent calibration drift over temperature cycles, maintaining ±0.005% full-scale accuracy. |
Use Scenario: Biopotential amplification in portable ECG or EEG devices requiring high common-mode rejection and low power. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer with rail-to-rail input enabling ±0.1 V common-mode range on 3.3 V supply. Use Value: 1.1 μVPP (0.1–10 Hz) noise and 130 dB CMRR suppress 50/60 Hz interference and electrode half-cell potentials without notch filtering. |
| Battery-Powered Test Equipment | Precision DAC Output Buffer |
Use Scenario: Voltage-to-current conversion in handheld multimeters and loop calibrators operating from single AA/AAA cells. IC Role / Device Role / Timing Role: High-side current source controller with 17 μA per amplifier enabling >500-hour runtime on 2000 mAh batteries. Use Value: Rail-to-rail output swing ensures full 0–20 mA compliance range even at 1.8 V supply, eliminating need for charge pumps. |
Use Scenario: Driving high-impedance loads (e.g., 100 kΩ+ ADC inputs or piezoelectric actuators) from 16-bit DACs in industrial control modules. IC Role / Device Role / Timing Role: Low-noise, low-drift output buffer isolating DAC core from capacitive/inductive loads while preserving monotonicity. Use Value: 10 μV offset and 50 mV rail-to-rail swing guarantee <1 LSB error at 5 V full-scale for 16-bit systems (±76 μV LSB). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDGKR | Same silicon, VSSOP-8 package (3.0 × 3.0 mm); RθJA = 180.3°C/W vs 46.7°C/W for DRB | Lower thermal performance limits continuous output current in high-ambient industrial enclosures | Select DRB (OPA2333AIDRBT) for thermally constrained PCBs; choose VSSOP only if legacy layout compatibility required |
| AD8628ARZ-REEL7 | Single-channel, SOIC-8; 1 μV max offset, 0.002 μV/°C drift, but 220 μA IQ - 13× higher quiescent current | Not suitable for multi-channel or ultra-low-power designs; better for ultra-high-precision single-ended stages | Use AD8628 only when sub-μV offset dominates over power budget; OPA2333AIDRBT preferred for dual-channel, battery-critical systems |
Compared with OPA2333AIDGKR, OPA2333AIDRBT offers superior thermal management for sustained operation in compact enclosures; versus AD8628ARZ-REEL7, it trades marginal offset improvement for 13× lower power and dual-channel integration - making it optimal for space- and energy-constrained embedded signal chains.
Availability
OPA2333AIDRBT is available at Aetrix Electronics and suitable for electronic scales, portable medical devices, and battery-powered test equipment requiring stable component supply across extended product lifecycles.
Supply support for OPA2333AIDRBT 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 decades of innovation in precision amplifiers and low-power signal chain solutions.
The OPA2333AIDRBT belongs to TI's Zero-Drift Series, designed specifically for high-accuracy, low-voltage applications where DC stability, micro-power operation, and rail-to-rail performance are non-negotiable - such as sensor interfaces and portable instrumentation.
FAQ
What is the maximum operating temperature range for the OPA2333AIDRBT?
The OPA2333AIDRBT is fully specified from −40°C to +125°C ambient temperature and qualified for continuous operation up to +150°C junction temperature. Its DRB package achieves RθJA = 46.7°C/W, enabling reliable thermal performance in sealed industrial enclosures without forced airflow - critical for long-term deployment in automotive cabin modules and smart metering systems where OPA2333AIDRBT serves as the primary sensor amplifier.
Does the OPA2333AIDRBT require external compensation for unity-gain stability?
No, the OPA2333AIDRBT is internally compensated and unity-gain stable across its full operating range. It maintains phase margin >60° with 100 pF capacitive load and exhibits no output phase reversal - a key differentiator from older chopper-stabilized amplifiers. This eliminates external compensation components in OPA2333AIDRBT-based transducer interfaces and simplifies layout for high-precision, low-noise PCBs targeting medical-grade signal integrity.
How does the exposed thermal pad on the OPA2333AIDRBT DRB package affect PCB layout?
The exposed thermal die pad on the OPA2333AIDRBT must be soldered to a dedicated copper pour connected to V− (or left floating per TI recommendation); it is not electrically isolated. Proper thermal via placement (≥4 vias, 0.3 mm diameter) beneath the pad reduces RθJB to 22.2°C/W, preventing thermal runaway during sustained 125°C operation. Incorrect pad connection degrades OPA2333AIDRBT's 0.05 μV/°C drift spec and risks parametric shift in high-reliability applications like aerospace sensor nodes.
Can the OPA2333AIDRBT drive ADC inputs directly without external buffering?
Yes - the OPA2333AIDRBT's rail-to-rail output swing (within 50 mV of rails at 10 kΩ) and low 1.1 μVPP (0.1–10 Hz) noise make it ideal for direct driving of SAR and ΣΔ ADC references and analog inputs. Its 350 kHz GBW and 0.16 V/μs slew rate settle 16-bit codes in <1 μs, and its 130 dB PSRR rejects supply noise that would otherwise alias into OPA2333AIDRBT-driven ADC conversions - especially critical in mixed-signal IoT edge nodes.
What is the turn-on time specification for the OPA2333AIDRBT?
The OPA2333AIDRBT achieves full offset accuracy within 100 μs after power-up at +5 V supply, as verified in TI's SBOS351E datasheet. This fast settling enables rapid wake-from-sleep operation in duty-cycled sensor systems - for example, in wireless gas detectors where OPA2333AIDRBT powers up, conditions the electrochemical cell signal, digitizes it, then returns to sleep, all within a 500 μs window to conserve battery life.
OPA2333AIDRBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-SON (3x3)
OPA2333AIDRBT FAQ
1.How can I place an order for OPA2333AIDRBT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2333AIDRBT 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 OPA2333AIDRBT reliable?
The price and inventory of OPA2333AIDRBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2333AIDRBT is usually 5 days.
3.What payment methods are accepted for OPA2333AIDRBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2333AIDRBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2333AIDRBT?
OPA2333AIDRBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2333AIDRBT 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 OPA2333AIDRBT?
For technical support, including OPA2333AIDRBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2333AIDRBT requirements.
6.How does Aetrix verify that OPA2333AIDRBT is sourced from the original manufacturer or authorized distributors?
All OPA2333AIDRBT 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 OPA2333AIDRBT meets industry standards.
7.What is the process for return or replacement of OPA2333AIDRBT?
All OPA2333AIDRBT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2333AIDRBT, 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 OPA2333AIDRBT part is unused and in its original packaging.
Return procedure for OPA2333AIDRBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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