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Texas Instruments OPA334AIDBVR
- Part No.:
- OPA334AIDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
OPA334AIDBVR.pdf
- Description:
- IC OPAMP ZER-DRIFT 1CIRC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,670
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Product details
Overview
OPA334AIDBVR from Texas Instruments is a single-channel, zero-drift CMOS operational amplifier in SOT-23-6 package with shutdown control, 5 µV max input offset voltage, 0.05 µV/°C max drift, and 285 µA quiescent current-designed for precision transducer signal conditioning in battery-powered medical instrumentation.
For engineers reviewing the OPA334AIDBVR datasheet, OPA334AIDBVR pinout, OPA334AIDBVR application, or OPA334AIDBVR equivalent, key selection criteria include ultra-low offset stability over temperature, rail-to-rail output swing on +2.7V to +5.5V single supply, and sub-µV/°C drift performance in micro-size packages for handheld test equipment and electronic scales.
Technical Context
The OPA334AIDBVR employs auto-zeroing architecture with continuous-time correction at 10 kHz, enabling near-zero long-term drift and eliminating 1/f noise without introducing significant switching artifacts. Its internal topology includes a high-precision main amplifier and dedicated correction circuitry that completes one full calibration cycle every 100 µs.
It supports true single-supply operation with input common-mode range extending from (V–) – 0.1 V to (V+) – 1.5 V and rail-to-rail output swing down to within 15 mV of either rail under 10 kΩ load-enabling direct interfacing with low-voltage ADCs and microcontrollers in portable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 5 µV max - ensures ≤0.01% gain error in 50 mV full-scale bridge sensor outputs without trimming. |
| Offset Drift | 0.05 µV/°C max - maintains <1 µV total drift across –40°C to +125°C industrial temperature range. |
| Quiescent Current | 285 µA - enables >1-year battery life in 10 µA-average-current handheld instruments using duty-cycled shutdown. |
| Supply Voltage Range | +2.7 V to +5.5 V - compatible with Li-ion, 3.3 V, and 5 V system rails without level-shifting. |
| Gain-Bandwidth Product | 2 MHz - supports stable unity-gain configuration for DC-coupled sensor front-ends up to ~100 kHz bandwidth. |
| Shutdown Current | 2 µA - reduces power by 140× during idle periods, critical for intermittent-sampling data loggers. |
| Input Bias Current | ±200 pA max - minimizes voltage error across high-impedance thermocouple or pH electrode sources. |
Pinout & Package
SOT-23-6 package (DBV), 2.9 mm × 1.6 mm × 1.3 mm body, JEDEC MO-178 compliant, surface-mount, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Enable | Digital control input | CMOS-compatible logic input referenced to V–; >0.75×(V+–V–) enables amplifier, <0.8 V disables it into 2 µA standby mode. |
| 2 - V– | Negative supply rail | Reference for enable logic and analog ground; supports single-supply operation when tied to system GND. |
| 3 - In– | Inverting input | Differential input node with ±200 pA bias current; requires matched trace impedance for optimal CMRR. |
| 4 - Out | Analog output | Rail-to-rail output capable of sourcing/sinking ±50 mA; enters high-impedance state during shutdown. |
| 5 - In+ | Non-inverting input | High-impedance input (1 pF differential capacitance); sensitive to PCB leakage and ESD-requires guard ring layout. |
| 6 - V+ | Positive supply rail | Accepts +2.7 V to +5.5 V; must be decoupled with 0.1 µF ceramic capacitor placed ≤2 mm from pin. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-zeroing | Continuous 10 kHz correction eliminates thermal drift and 1/f noise without output glitches above 20 MHz. |
| Shutdown mode | 1 µs disable time and 150 µs wake-up (including one full auto-zero cycle) enable precise timing-controlled power gating. |
| Rail-to-rail output | Swings within 15 mV of V– and V+ under 10 kΩ load-supports direct interface with 12-bit SAR ADCs operating at VREF = V+. |
| Single-supply optimized | Input common-mode extends to V– – 0.1 V and V+ – 1.5 V-enables Kelvin sensing and low-side current measurement without level shifters. |
| MicroSIZE packaging | SOT-23-6 footprint saves >60% board area vs SO-8, critical for space-constrained handheld medical devices. |
Applications
| Transducer Signal Conditioning | Temperature Measurement |
|---|---|
Use Scenario: Amplifying low-level mV outputs from strain-gauge bridges in electronic scales with 0.001% linearity requirement. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with programmable gain and offset nulling via external resistors. Use Value: 5 µV offset and 0.05 µV/°C drift ensure scale calibration remains valid across warehouse temperature swings (15°C–35°C) without recalibration. | Use Scenario: Cold-junction compensation and linearization of K-type thermocouples in portable clinical thermometers. IC Role / Device Role / Timing Role: High-input-impedance buffer and cold-junction reference amplifier driving 16-bit delta-sigma ADC. Use Value: ±200 pA input bias current prevents thermocouple wire junction errors; rail-to-rail output maximizes ADC dynamic range utilization. |
| Battery-Powered Instrumentation | Medical Sensor Front-End |
Use Scenario: Signal amplification in handheld multimeters with auto-ranging and 100-hour battery life target. IC Role / Device Role / Timing Role: Low-power, high-accuracy gain stage activated only during measurement cycles via enable pin control. Use Value: 2 µA shutdown current extends battery life by 140× versus active operation; 150 µs wake-up allows rapid sampling without latency penalty. | Use Scenario: Biopotential signal conditioning for ECG/EMG electrodes in wearable patient monitors. IC Role / Device Role / Timing Role: Ultra-low-noise, DC-coupled amplifier with high CMRR for rejecting 50/60 Hz mains interference. Use Value: 130 dB CMRR and 1.4 µVPP 0.01–10 Hz noise preserve microvolt-level cardiac signals amid noisy hospital environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA335AIDBVR | No shutdown pin; same SOT-23-5 package, identical offset/drift specs, but lacks enable control and has one fewer pin. | Used where continuous operation is required and board space permits removal of shutdown logic. | Select when lowest possible cost and simplified routing outweigh need for power gating. |
| LTC2050CS5#TRMPBF | Higher quiescent current (800 µA), larger offset (10 µV max), but wider supply range (±1.65 V to ±5.5 V) and better PSRR (130 dB). | Preferred in dual-supply industrial PLC modules requiring higher supply flexibility and noise immunity. | Choose when system uses split supplies or demands superior power-supply rejection over ultra-low IQ. |
Compared with OPA335AIDBVR, the OPA334AIDBVR adds shutdown capability at the cost of one pin and slightly higher package height; versus LTC2050CS5#TRMPBF, it delivers 3× lower quiescent current and tighter offset spec but narrower supply range and no dual-supply support.
Availability
OPA334AIDBVR is available at Aetrix Electronics and suitable for transducer signal conditioning, temperature measurement, and battery-powered instrumentation requiring stable component supply across extended temperature ranges (–40°C to +125°C) and long production lifecycles.
Supply support for OPA334AIDBVR 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 with emphasis on precision, power efficiency, and reliability.
The OPA334 family belongs to TI's Zerø-Drift Series of precision op amps, engineered specifically for high-accuracy, low-power sensor signal chains in portable and industrial measurement systems.
FAQ
What is the maximum operating temperature range for the OPA334AIDBVR?
The OPA334AIDBVR is specified for operation from –40°C to +125°C and rated for junction temperatures up to +150°C. This extended industrial temperature range ensures reliable performance in automotive cabin sensors, industrial process controllers, and outdoor medical devices exposed to ambient thermal extremes.
Does the OPA334AIDBVR require external capacitors for stability?
Yes-the OPA334AIDBVR requires a 0.1 µF ceramic capacitor placed directly across the V+ and V– pins, located ≤2 mm from the device. This decoupling capacitor suppresses supply noise and prevents oscillation due to parasitic inductance in PCB traces, especially critical in high-impedance sensor interfaces.
How does the enable pin function on the OPA334AIDBVR?
The enable pin on the OPA334AIDBVR is a CMOS input referenced to V–. A voltage >0.75×(V+–V–) activates the amplifier; <0.8 V disables it, reducing current to 2 µA and placing the output in high-impedance state. Leaving the pin unconnected is not permitted-it must be driven high or low.
Can the OPA334AIDBVR drive heavy capacitive loads?
The OPA334AIDBVR is not unity-gain stable with large capacitive loads (>500 pF) without isolation resistance. For loads >100 pF, a series resistor (e.g., 10–100 Ω) between output and capacitance is recommended to maintain phase margin and prevent peaking or oscillation per typical characteristics data.
Is the OPA334AIDBVR RoHS compliant and lead-free?
Yes-the OPA334AIDBVR is RoHS compliant with lead finish NIPDAU (nickel-palladium-gold), moisture sensitivity level 2 (260°C peak reflow), and fully qualified for lead-free soldering processes per JEDEC J-STD-020. The part marking "OAOI" and DBV package confirm this compliance.
OPA334AIDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.6V/µs
- Gain Bandwidth Product:
- 2 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 70 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 285µA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
OPA334AIDBVR FAQ
1.How can I place an order for OPA334AIDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA334AIDBVR 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 OPA334AIDBVR reliable?
The price and inventory of OPA334AIDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA334AIDBVR is usually 5 days.
3.What payment methods are accepted for OPA334AIDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA334AIDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA334AIDBVR?
OPA334AIDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA334AIDBVR 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 OPA334AIDBVR?
For technical support, including OPA334AIDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA334AIDBVR requirements.
6.How does Aetrix verify that OPA334AIDBVR is sourced from the original manufacturer or authorized distributors?
All OPA334AIDBVR 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 OPA334AIDBVR meets industry standards.
7.What is the process for return or replacement of OPA334AIDBVR?
All OPA334AIDBVR units undergo pre-shipment inspection (PSI). If there is an issue with OPA334AIDBVR, 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 OPA334AIDBVR part is unused and in its original packaging.
Return procedure for OPA334AIDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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