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Texas Instruments OPA2333AIDGKT
- Part No.:
- OPA2333AIDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2333AIDGKT.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2CIRC 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,290
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Product details
Overview
OPA2333AIDGKT 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 weigh-scale front-ends.
For engineers reviewing the OPA2333AIDGKT datasheet, OPA2333AIDGKT pinout, OPA2333AIDGKT application, or OPA2333AIDGKT equivalent, key selection criteria include its DFN-8 (SON-8) thermal pad package, dual-channel zero-drift architecture, 350 kHz gain-bandwidth, 1.1 μVPP 0.1–10 Hz noise, and guaranteed –40°C to +125°C operation - all critical for stable, low-drift analog front-ends in industrial and portable instrumentation.
Technical Context
The OPA2333AIDGKT employs a proprietary auto-calibration technique that corrects input offset every 8 μs using a time-continuous 350-kHz signal-path amplifier, eliminating 1/f noise and aliasing while maintaining unity-gain stability. Its CMOS input stage provides 70 pA typical bias current and rail-to-rail common-mode range extending 100 mV beyond both supply rails.
This dual op-amp integrates independent input stages with no crossover distortion, delivering superior CMRR and differential linearity when driving SAR or delta-sigma ADCs. The exposed thermal die pad on the underside of the DFN-8 package enables 22.2°C/W junction-to-board thermal resistance, supporting reliable operation at full spec under continuous load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 10 μV max - ensures ≤0.02% error in 50-mV sensor outputs without trimming |
| Drift vs Temp | 0.05 μV/°C max - maintains <1 μV total drift over full –40°C to +125°C range |
| Supply Range | 1.8 V to 5.5 V - supports direct Li-ion (3.0–4.2 V) and single-cell alkaline (1.8 V min) operation |
| Quiescent Current | 17 μA per amp - enables >1-year battery life in always-on 10-μA system budgets |
| 0.1–10 Hz Noise | 1.1 μVPP - resolves sub-μV DC shifts in thermopile or strain-gauge measurements |
| Gain-Bandwidth | 350 kHz - sufficient for anti-aliasing filtering and closed-loop control up to ~35 kHz |
| Output Swing | Within 50 mV of rails - achieves 0–2.45 V output from 2.5 V supply for ADC reference compliance |
Pinout & Package
OPA2333AIDGKT is housed in an 8-pin DFN (SON-8) package measuring 3.0 mm × 3.0 mm with an exposed thermal die pad on the underside. The pad must be connected to V– or left floating per TI design guidelines; it is not electrically tied to any internal node.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives feedback network or ADC input with rail-to-rail swing |
| 2 | –IN A | Inverting input, channel A - connects to feedback resistor or transducer return path |
| 3 | +IN A | Noninverting input, channel A - accepts high-impedance sensor signals up to V+ + 0.1 V |
| 4 | V– | Negative supply rail - reference for both amplifiers; ties to PCB ground plane or negative rail |
| 5 | +IN B | Noninverting input, channel B - isolated from channel A for dual-sensor or differential-pair use |
| 6 | –IN B | Inverting input, channel B - supports independent gain-setting for second signal path |
| 7 | OUT B | Amplifier B output - enables simultaneous dual-channel signal conditioning without crosstalk |
| 8 | V+ | Positive supply rail - powers both amplifiers; requires local 0.1-μF ceramic decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-calibration | Continuous 8-μs correction cycle eliminates long-term drift and 1/f noise without sampling artifacts |
| Rail-to-rail I/O | Input common-mode extends 100 mV beyond rails; output swings within 50 mV - maximizes dynamic range at low supply |
| Ultra-low power | 17 μA per amplifier enables dual-channel precision amplification in 35-μA total system budget |
| High CMRR | 106 dB min over –40°C to +125°C - preserves signal integrity in noisy industrial environments |
| ESD robustness | ±4 kV HBM - withstands handling and board-level ESD events without latch-up or parameter shift |
Applications
| Medical Sensor Front-End | Electronic Weigh Scale |
|---|---|
Use Scenario: Amplifying microvolt-level outputs from thermopile or ECG electrodes in portable monitors. IC Role / Device Role / Timing Role: Dual-channel precision amplifier providing matched gain and offset correction for differential biopotential sensing. Use Value: 10 μV offset and 0.05 μV/°C drift ensure baseline stability across body-temperature variations without recalibration. |
Use Scenario: Conditioning bridge outputs from load cells in handheld scales with 0.01% accuracy requirement. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier driver with rail-to-rail input enabling full bridge swing utilization. Use Value: 1.1 μVPP 0.1–10 Hz noise and 106 dB CMRR reject power-line interference and mechanical vibration artifacts. |
| Battery-Powered Data Logger | Industrial Temperature Transmitter |
Use Scenario: Signal conditioning for RTD or thermistor circuits in remote environmental loggers running on coin cells. IC Role / Device Role / Timing Role: Low-power dual op-amp implementing 3-wire RTD excitation and ratiometric measurement. Use Value: 17 μA per amplifier allows continuous 100-ms sampling for >2-year battery life; 1.8 V min supply supports aging battery discharge. |
Use Scenario: Converting 4–20 mA loop signals with high-side sensing in hazardous-area temperature transmitters. IC Role / Device Role / Timing Role: High-side current-sense amplifier with precise gain and offset for 4–20 mA calibration. Use Value: Guaranteed –40°C to +125°C operation and 0.05 μV/°C drift maintain loop accuracy across ambient extremes without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333PDR | Same silicon, SOIC-8 package - 124°C/W θJA, no thermal pad, 4.9 mm × 3.9 mm footprint | Preferred for through-hole prototyping or legacy PCBs requiring SOIC compatibility | Select when thermal performance is secondary to assembly simplicity or existing SOIC layout reuse |
| AD8638ARZ-REEL7 | Single-supply zero-drift op-amp; 12 μV offset, 0.05 μV/°C drift, but single-channel only and 2.7–5.5 V supply | Requires two devices for dual-channel function; lacks rail-to-rail input beyond rails | Choose only if SOIC-8 footprint and single-channel operation suffice; verify 2.7 V min supply compatibility |
Compared with OPA2333AIDGKT, the OPA2333PDR offers identical electrical performance in a larger, thermally less efficient SOIC package, while the AD8638ARZ-REEL7 provides comparable precision but requires duplication and cannot match the 1.8 V operation or rail-to-rail input margin - making OPA2333AIDGKT optimal for space-constrained, ultra-low-voltage dual-channel designs.
Availability
OPA2333AIDGKT is available at Aetrix Electronics and suitable for medical instrumentation, battery-powered test equipment, and industrial temperature transmitters requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for OPA2333AIDGKT 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 expertise in precision amplifiers and low-power signal chains.
The OPA2333AIDGKT belongs to TI's Zero-Drift Series, designed specifically for high-accuracy, low-drift analog signal conditioning in resource-constrained environments such as portable medical devices and industrial sensors.
FAQ
What is the maximum operating temperature range for the OPA2333AIDGKT?
The OPA2333AIDGKT is fully specified from –40°C to +125°C ambient temperature, with absolute maximum junction temperature rated at 150°C. Its DFN-8 package achieves 22.2°C/W junction-to-board thermal resistance, enabling reliable operation at full specification under continuous load in harsh industrial environments - a key advantage over standard SOIC-packaged alternatives.
Does the OPA2333AIDGKT require external capacitors for stability?
No, the OPA2333AIDGKT 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, as close as possible to the device, to suppress high-frequency noise and ensure stable operation with noisy or high-impedance supplies - a requirement confirmed in the official SBOS351E datasheet section 8.1.
Can the OPA2333AIDGKT drive capacitive loads directly?
The OPA2333AIDGKT can drive up to 100 pF capacitive load while maintaining stability, as verified in the Typical Characteristics section (Figure 15). For loads exceeding 100 pF, TI recommends adding a small series resistor (e.g., 10–50 Ω) between the output and the load capacitance to isolate the amplifier from phase-shift effects - a design practice documented in the SBOS351E datasheet Figure 15 and Application Note SLAU515.
Is the exposed thermal pad on the OPA2333AIDGKT package electrically connected?
No, the exposed thermal die pad on the underside of the OPA2333AIDGKT's DFN-8 package is not electrically connected to any internal node. Per TI's official guidance in SBOS351E section 7.3.5, it may be connected to V– for improved thermal performance or left unconnected - but must never be tied to V+, ground, or any other potential without verification via the device's internal schematic.
How does the auto-calibration circuit in the OPA2333AIDGKT affect signal bandwidth?
The OPA2333AIDGKT's auto-calibration operates at 125 kHz (every 8 μs), but uses a time-continuous 350-kHz signal-path amplifier that remains active during correction cycles - resulting in no interruption, sampling artifacts, or aliasing. This architecture preserves full 350-kHz gain-bandwidth and enables clean step response (Figure 11), unlike chopper-stabilized amplifiers with discontinuous signal paths.
OPA2333AIDGKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- 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-VSSOP
OPA2333AIDGKT FAQ
1.How can I place an order for OPA2333AIDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2333AIDGKT 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 OPA2333AIDGKT reliable?
The price and inventory of OPA2333AIDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2333AIDGKT is usually 5 days.
3.What payment methods are accepted for OPA2333AIDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2333AIDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2333AIDGKT?
OPA2333AIDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2333AIDGKT 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 OPA2333AIDGKT?
For technical support, including OPA2333AIDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2333AIDGKT requirements.
6.How does Aetrix verify that OPA2333AIDGKT is sourced from the original manufacturer or authorized distributors?
All OPA2333AIDGKT 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 OPA2333AIDGKT meets industry standards.
7.What is the process for return or replacement of OPA2333AIDGKT?
All OPA2333AIDGKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2333AIDGKT, 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 OPA2333AIDGKT part is unused and in its original packaging.
Return procedure for OPA2333AIDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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