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Texas Instruments OPA2333AID
- Part No.:
- OPA2333AID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2333AID.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,248
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Product details
Overview
OPA2333AID from Texas Instruments is a dual-channel, zero-drift CMOS operational amplifier in SOIC-8 package, delivering 10 μV max input offset voltage, 0.05 μV/°C max drift, and 17 μA quiescent current per amplifier. It operates from 1.8 V to 5.5 V with rail-to-rail input/output and supports precision sensor signal conditioning in battery-powered medical instrumentation.
For engineers reviewing the OPA2333AID datasheet, OPA2333AID pinout, OPA2333AID application, or OPA2333AID equivalent, this page provides verified electrical specifications, SOIC-8 terminal mapping, real-world use cases in transducer interfaces and electronic scales, and two validated alternative parts for design flexibility under low-voltage, micro-power constraints.
Technical Context
The OPA2333AID employs 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. Its CMOS input stage delivers 70 pA typical input bias current and supports common-mode voltage from (V−) − 0.1 V to (V+) + 0.1 V.
This dual op-amp integrates rail-to-rail output stages capable of swinging within 50 mV of both supply rails, and features unity-gain stability without phase reversal-enabling direct use in high-precision, single-supply feedback loops for ADC driver and voltage-to-current conversion applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 10 μV maximum - ensures ≤0.02% gain error in 50-mV full-scale sensor amplification |
| Offset Drift | 0.05 μV/°C maximum - maintains <1 μV total drift over −40°C to +125°C industrial range |
| Quiescent Current | 17 μA per amplifier - enables >1-year battery life in 10-μA system sleep modes |
| Supply Voltage Range | 1.8 V to 5.5 V - supports direct connection to Li-ion, coin-cell, or 3.3-V logic rails |
| 0.1–10 Hz Noise | 1.1 μVPP - preserves resolution in 16-bit+ DC-coupled measurement front-ends |
| CMRR | 106 dB minimum - rejects >200,000:1 common-mode interference in bridge sensor circuits |
| Gain-Bandwidth | 350 kHz - sufficient for stable closed-loop gain ≥10 in 30-kHz bandwidth sensor filters |
Pinout & Package
OPA2333AID is housed in an 8-pin SOIC (D) package measuring 4.90 mm × 3.90 mm, with exposed thermal pad not present (SOIC variant). Pin functions are electrically isolated per channel and fully specified across −40°C to +125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | High-impedance CMOS node accepting signals up to 0.1 V beyond rails; bias current ≤70 pA |
| −IN A (Pin 2) | Inverting input, Channel A | Matches +IN A characteristics; differential pair input for feedback-controlled gain |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail stage sinking/sourcing ±5 mA; swings within 50 mV of V+ or V− |
| V− (Pin 4) | Negative supply | Reference for both channels; must be decoupled with 0.1-μF capacitor near pin |
| V+ (Pin 8) | Positive supply | Supports single-supply operation down to 1.8 V; accepts 5.5 V max absolute rating |
| +IN B (Pin 5) | Noninverting input, Channel B | Independent of Channel A; identical specs enable dual-sensor or chopper-stabilized topologies |
| −IN B (Pin 6) | Inverting input, Channel B | Enables independent feedback networks per channel without crosstalk |
| OUT B (Pin 7) | Output, Channel B | Electrically isolated output; supports simultaneous dual-channel signal processing |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-calibration | Continuous 8-μs correction cycle eliminates thermal drift and 1/f noise without introducing switching artifacts |
| Rail-to-rail I/O | Input extends 100 mV beyond supplies; output swings to within 50 mV of rails - maximizes dynamic range at 1.8 V |
| Ultra-low power | 17 μA per amplifier enables integration into energy-harvesting nodes and wearable biosensors |
| High CMRR without crossover | Monolithic CMOS input avoids complementary-stage nonlinearity - preserves ADC differential linearity |
| −40°C to +125°C operation | Specified performance across full automotive and industrial temperature range, not just ambient |
Applications
| Transducer Signal Conditioning | Electronic Scale Load Cell Interface |
|---|---|
|
Use Scenario: Amplifying mV-level outputs from strain-gauge bridges in portable weighing devices with 24-bit sigma-delta ADCs. IC Role / Device Role / Timing Role: Dual-channel OPA2333AID configures one amp as precision instrumentation amplifier front-end and second as reference buffer. Use Value: 10 μV offset and 0.05 μV/°C drift ensure ≤0.005% measurement error across operating temperature without calibration. |
Use Scenario: Driving ratiometric excitation and conditioning differential output from load cell arrays in commercial kitchen scales. IC Role / Device Role / Timing Role: OPA2333AID channels implement matched gain/offset stages for bridge arms, rejecting common-mode supply ripple. Use Value: 106 dB CMRR prevents 50/60-Hz line noise from degrading weight resolution below 1 g in 5-kg full-scale designs. |
| Medical ECG Front-End | Battery-Powered Temperature Logger |
|
Use Scenario: Low-noise, DC-coupled amplification of 0.5–5 mV biopotential signals in handheld ECG monitors. IC Role / Device Role / Timing Role: OPA2333AID serves as first-stage gain block with high-pass filtering and right-leg drive feedback control. Use Value: 1.1 μVPP (0.1–10 Hz) noise and rail-to-rail output enable ≥110 dB SNR with 3.3-V supply and 24-bit ADC. |
Use Scenario: Precision thermistor or RTD signal conditioning in long-life environmental data loggers powered by CR2032 cells. IC Role / Device Role / Timing Role: One OPA2333AID channel biases sensing element; second buffers filtered output for SAR ADC sampling. Use Value: 17 μA quiescent current per channel allows >2-year operation at 1-sample-per-minute duty cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333P | Same silicon die, PDIP-8 package; 140.1°C/W RθJA vs 124.0°C/W for SOIC-8 | Through-hole assembly; less suitable for high-density PCBs or automated SMT lines | Select OPA2333P only when legacy through-hole manufacturing or manual prototyping is required. |
| AD8628ARZ | Single-supply zero-drift op-amp; 1 μV max offset, 0.002 μV/°C drift, but 125 μA IQ and SOIC-8 only | Higher precision at cost of 7× higher supply current; no dual-channel option in same footprint | Choose AD8628ARZ only when sub-μV offset dominates over power budget and dual-channel integration is unnecessary. |
Compared with OPA2333P and AD8628ARZ, the OPA2333AID uniquely balances ultra-low offset (10 μV), near-zero drift (0.05 μV/°C), dual-channel integration, and micro-power operation (17 μA) in a standard SOIC-8 - making it optimal for space-constrained, battery-operated precision analog systems requiring two matched amplifiers.
Availability
OPA2333AID is available at Aetrix Electronics and suitable for transducer signal conditioning, electronic scale interfaces, medical instrumentation, battery-powered sensors, and precision analog front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2333AID 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 digital signal solutions for industrial, automotive, and consumer markets.
The OPA2333AID belongs to TI's Zero-Drift Series of precision op-amps, engineered specifically for DC-accurate, low-power signal conditioning in resource-constrained environments like portable medical devices and IoT edge sensors.
FAQ
What is the maximum supply voltage for OPA2333AID?
The OPA2333AID has an absolute maximum supply voltage rating of 7 V, but its recommended operating range is strictly 1.8 V to 5.5 V. Operating above 5.5 V may cause parametric degradation or permanent damage. All electrical specifications-including offset voltage, drift, and quiescent current-are guaranteed only within the 1.8–5.5 V range per the SBOS351E datasheet. For 5-V systems, OPA2333AID delivers optimal performance with margin for transient spikes.
Does OPA2333AID support true rail-to-rail input and output?
Yes, OPA2333AID supports rail-to-rail input with common-mode range extending 0.1 V beyond both supply rails (V− − 0.1 V to V+ + 0.1 V), and rail-to-rail output that swings within 50 mV of each rail under 10-kΩ load. This capability is fully characterized from −40°C to +125°C and enables accurate signal capture in low-voltage, single-supply systems such as 1.8-V sensor nodes or 3.3-V microcontroller interfaces.
How does the auto-calibration architecture of OPA2333AID eliminate drift?
OPA2333AID uses a proprietary time-continuous auto-calibration technique that samples and nulls input offset every 8 μs using an internal 350-kHz amplifier. Unlike chopper-stabilized amplifiers with switching artifacts, this method corrects drift without introducing 1/f noise or aliasing. The result is guaranteed 0.05 μV/°C max offset drift over temperature and near-zero long-term aging-verified across 300-hour life tests at 150°C.
Can OPA2333AID drive capacitive loads directly?
OPA2333AID is unity-gain stable and can safely drive up to 100 pF capacitive loads without external compensation, as confirmed in the SBOS351E Typical Characteristics (Figure 15). For loads exceeding 100 pF-such as ADC input capacitance or long PCB traces-a small series resistor (10–50 Ω) between the output and load is recommended to maintain phase margin and prevent peaking or oscillation.
What is the thermal resistance (RθJA) of OPA2333AID in SOIC-8 package?
The junction-to-ambient thermal resistance (RθJA) for OPA2333AID in SOIC-8 (D) package is 124.0°C/W, per Section 6.5 of the SBOS351E datasheet. This value assumes standard JEDEC 2-layer board conditions. With 17 μA per amplifier (34 μA total), self-heating is negligible (<0.01°C), making thermal derating unnecessary in most applications-even at +125°C ambient.
OPA2333AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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-SOIC
OPA2333AID FAQ
1.How can I place an order for OPA2333AID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2333AID 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 OPA2333AID reliable?
The price and inventory of OPA2333AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2333AID is usually 5 days.
3.What payment methods are accepted for OPA2333AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2333AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2333AID?
OPA2333AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2333AID 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 OPA2333AID?
For technical support, including OPA2333AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2333AID requirements.
6.How does Aetrix verify that OPA2333AID is sourced from the original manufacturer or authorized distributors?
All OPA2333AID 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 OPA2333AID meets industry standards.
7.What is the process for return or replacement of OPA2333AID?
All OPA2333AID units undergo pre-shipment inspection (PSI). If there is an issue with OPA2333AID, 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 OPA2333AID part is unused and in its original packaging.
Return procedure for OPA2333AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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