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Texas Instruments OPA2333PIDSGT
- Part No.:
- OPA2333PIDSGT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
OPA2333PIDSGT.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:5,050
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Product details
Overview
OPA2333PIDSGT from Texas Instruments is a dual-channel, zero-drift, rail-to-rail input/output operational amplifier optimized for precision, low-power, single-supply operation. It delivers 10 µV maximum offset voltage, 0.05 µV/°C maximum drift, 17 µA quiescent current per amplifier, 1.8 V to 5.5 V supply range, and 350 kHz gain-bandwidth - enabling high-accuracy signal conditioning in battery-powered medical sensors and portable instrumentation.
For engineers reviewing the OPA2333PIDSGT datasheet, OPA2333PIDSGT pinout, OPA2333PIDSGT application, or OPA2333PIDSGT equivalent, key selection criteria include guaranteed start-up time ≤500 µs, 0.1–10 Hz noise of 1.1 µVPP, CMRR ≥106 dB over temperature, rail-to-rail output swing within 30 mV of rails, and WSON-8 package compatibility with space-constrained PCB layouts.
Technical Context
The OPA2333PIDSGT employs a proprietary auto-calibration architecture with continuous 350-kHz signal-path amplification and periodic (every 8 µs) offset correction, eliminating 1/f flicker noise while maintaining unity-gain stability. Its CMOS input stage provides 1013 Ω || 2 pF differential impedance and common-mode range extending 100 mV beyond both supply rails.
This dual op-amp integrates two independent, matched channels sharing a single 8-pin WSON package with exposed thermal pad. Each channel features independent input terminals (±IN A/B), dedicated outputs (OUT A/B), and shared V+ and V− supplies - supporting simultaneous bidirectional current sensing, precision reference buffering, and ADC driver functions without crosstalk-induced linearity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | ±10 µV max - ensures <1 LSB error in 16-bit systems with 3.3 V full-scale ADC input |
| Offset Drift | ±0.05 µV/°C max - maintains calibration stability across –40°C to +125°C industrial operating range |
| Supply Range | 1.8 V to 5.5 V - supports direct connection to Li-ion, coin-cell, or 3.3 V/5 V system rails without LDO |
| Quiescent Current | 17 µA per amplifier - enables >1-year battery life in wearable ECG monitors drawing <100 µA total system current |
| Gain-Bandwidth | 350 kHz - sufficient for DC–100 Hz biomedical signal amplification with ≥60 dB closed-loop gain |
| Input Noise | 1.1 µVPP (0.1–10 Hz) - preserves microvolt-level biopotential resolution in fitness sensor front-ends |
| Output Swing | Within 30 mV of rails at 10 kΩ load - achieves true 0–3.3 V output range for single-supply SAR ADC interfacing |
| Start-Up Time | ≤500 µs - guarantees stable output settling before first ADC sample in duty-cycled sensor nodes |
Pinout & Package
OPA2333PIDSGT is housed in an 8-pin WSON (DSG) package measuring 2.00 mm × 2.00 mm with exposed thermal pad on bottom. The package supports fine-pitch SMT assembly and provides low thermal resistance (RθJA = 74.5°C/W) for thermally sensitive precision applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT A (Pin 1) | Output, Channel A | Drives external load or ADC input; rail-to-rail swing enables full dynamic range utilization |
| –IN A (Pin 2) | Inverting Input, Channel A | Accepts feedback or inverted signal path; 70 pA bias current minimizes shunt resistor errors |
| +IN A (Pin 3) | Noninverting Input, Channel A | High-impedance node for sensor interface; extends 100 mV beyond supply rails |
| V− (Pin 4) | Negative Supply | Reference for dual-supply operation or ground in single-supply; thermal pad must connect to V− |
| +IN B (Pin 5) | Noninverting Input, Channel B | Independent reference buffer input; matched to Channel A for differential sensing accuracy |
| –IN B (Pin 6) | Inverting Input, Channel B | Configured as difference amplifier input; enables bidirectional current measurement with RSHUNT |
| OUT B (Pin 7) | Output, Channel B | Provides buffered reference voltage (e.g., VCC/2); drives high-impedance divider networks |
| V+ (Pin 8) | Positive Supply | Primary power rail; accepts 1.8–5.5 V; decoupling capacitor required within 2 mm |
Key Features
| Feature | Design Value |
|---|---|
| Zero-Drift Architecture | Auto-calibrates every 8 µs to eliminate 1/f noise and maintain <10 µV offset over lifetime and temperature |
| Rail-to-Rail I/O | Inputs operate 100 mV beyond rails; outputs swing within 30 mV - maximizes ADC utilization in 1.8 V systems |
| Specified Start-Up Time | Guaranteed ≤500 µs settling enables reliable wake-from-sleep operation in energy-harvesting sensor nodes |
| Ultra-Low Power | 17 µA per amplifier allows dual-channel precision amplification within 50 µA total system budget |
| High CMRR | ≥106 dB over –40°C to +125°C - prevents common-mode interference from degrading ADC differential linearity |
| WSON-8 Thermal Pad | Exposed die pad connected to V− reduces junction temperature rise by >15°C vs. standard SOIC-8 |
Applications
| Electronic Scales | Wearable Health Monitors |
|---|---|
Use Scenario: Precision weight measurement using micro-strain gauge bridges in portable bathroom or kitchen scales. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end: Channel A conditions bridge output; Channel B buffers reference voltage for ratiometric ADC conversion. Use Value: 10 µV offset and 0.05 µV/°C drift enable ±0.01% full-scale accuracy across 0–40°C ambient without recalibration. | Use Scenario: Continuous heart-rate and respiration monitoring via photoplethysmography (PPG) in smartwatches. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier (Channel A) converts photodiode current; Channel B provides stable LED bias reference. Use Value: 1.1 µVPP (0.1–10 Hz) noise floor resolves sub-microamp PPG signals; 17 µA/channel extends battery life to 7 days. |
| Battery-Powered Test Equipment | Medical Instrumentation |
Use Scenario: Handheld multimeter front-end measuring µV-level thermocouple outputs and mV-range sensor signals. IC Role / Device Role / Timing Role: Dual-channel programmable-gain amplifier: Channel A handles low-level inputs; Channel B configures auto-zero reference path. Use Value: Guaranteed 500 µs start-up ensures immediate measurement readiness after button press; rail-to-rail I/O supports 0–3.3 V ADC full scale. | Use Scenario: Portable ECG acquisition module capturing microvolt-level cardiac potentials with 50/60 Hz notch filtering. IC Role / Device Role / Timing Role: First-stage differential amplifier (Channel A) rejects common-mode interference; Channel B generates precise mid-rail bias for AC-coupled signal chain. Use Value: 106 dB CMRR suppresses mains interference; 125°C rating supports sterilization-compatible enclosure designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Same zero-drift architecture and specs, but in SOIC-8 package (4.9 × 6.0 mm) - 6× larger footprint, higher RθJA (120°C/W) | Preferred for prototyping or legacy through-hole PCBs where WSON reflow is unavailable | Select when board area >2 mm² per amplifier is acceptable and thermal margin exceeds 20°C |
| AD8628ARZ | Single-channel, 1 µV max offset, 0.005 µV/°C drift, but 220 µA IQ and SOIC-8 only - no WSON option | Suitable for ultra-high-precision single-channel needs where power budget allows 13× higher current | Choose only if offset drift requirement is <0.01 µV/°C and dual-channel integration is not needed |
Compared with OPA2333PIDSGT, OPA2333AIDR trades miniaturization and thermal performance for assembly flexibility, while AD8628ARZ offers superior drift performance at the cost of power efficiency and channel count - making OPA2333PIDSGT optimal for space- and energy-constrained dual-channel precision systems.
Availability
OPA2333PIDSGT is available at Aetrix Electronics and suitable for electronic scales, wearable health monitors, and battery-powered test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2333PIDSGT 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The OPA2333PIDSGT belongs to TI's precision zero-drift op-amp product line, engineered specifically for ultra-low-offset, low-power signal conditioning in portable and battery-operated measurement systems.
FAQ
What is the maximum operating temperature range for the OPA2333PIDSGT?
The OPA2333PIDSGT is specified for continuous operation from –40°C to +125°C, with absolute maximum junction temperature rated at 150°C. Its WSON-8 package with exposed thermal pad enables reliable performance in thermally demanding environments such as enclosed medical enclosures or automotive under-hood sensor modules - provided PCB layout follows TI's recommended copper pour and thermal via guidelines.
Does the OPA2333PIDSGT require external compensation for unity-gain stability?
No, the OPA2333PIDSGT is internally compensated and unity-gain stable across its full operating range. It achieves this without phase reversal or peaking, even when driving capacitive loads up to 100 pF - verified in Figure 16 of the SBOS908A datasheet. This eliminates need for external compensation networks in standard non-inverting or inverting configurations.
Can the OPA2333PIDSGT drive an ADC input directly without additional buffering?
Yes, the OPA2333PIDSGT can directly drive SAR and delta-sigma ADC inputs due to its rail-to-rail output swing (within 30 mV of rails at 10 kΩ), low output impedance (<2 kΩ at 350 kHz), and absence of output phase reversal. For optimal THD performance with fast-switching ADCs, TI recommends adding a 10–100 Ω series resistor between OPA2333PIDSGT output and ADC input to isolate capacitive loading effects.
How does the OPA2333PIDSGT achieve zero-drift performance without introducing switching artifacts?
The OPA2333PIDSGT uses a proprietary auto-calibration technique that operates continuously at 350 kHz in the signal path, with offset correction executed every 8 µs. Unlike chopper-stabilized amplifiers, it produces no aliasing or switching-induced ripple because its correction mechanism avoids sampling-based modulation - confirmed by flat 0.1–10 Hz noise spectral density and absence of spurs in Figure 18 of the datasheet.
Is the thermal pad on the OPA2333PIDSGT WSON package electrically active?
Yes, the exposed thermal pad on the OPA2333PIDSGT WSON-8 package is electrically connected to the V− pin and must be soldered to a PCB copper pour tied to the negative supply or ground plane. TI's datasheet explicitly states "Thermal Pad - Connect to V−" in the Pin Functions table; leaving it floating degrades thermal performance and may cause instability under high ambient temperatures.
OPA2333PIDSGT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-WFDFN 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 ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (2x2)
OPA2333PIDSGT FAQ
1.How can I place an order for OPA2333PIDSGT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2333PIDSGT 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 OPA2333PIDSGT reliable?
The price and inventory of OPA2333PIDSGT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2333PIDSGT is usually 5 days.
3.What payment methods are accepted for OPA2333PIDSGT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2333PIDSGT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2333PIDSGT?
OPA2333PIDSGT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2333PIDSGT 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 OPA2333PIDSGT?
For technical support, including OPA2333PIDSGT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2333PIDSGT requirements.
6.How does Aetrix verify that OPA2333PIDSGT is sourced from the original manufacturer or authorized distributors?
All OPA2333PIDSGT 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 OPA2333PIDSGT meets industry standards.
7.What is the process for return or replacement of OPA2333PIDSGT?
All OPA2333PIDSGT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2333PIDSGT, 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 OPA2333PIDSGT part is unused and in its original packaging.
Return procedure for OPA2333PIDSGT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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