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Texas Instruments OPA334AIDBVRG4
- Part No.:
- OPA334AIDBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
OPA334AIDBVRG4.pdf
- Description:
- IC OPAMP ZER-DRIFT 1CIRC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,639
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Product details
Overview
OPA334AIDBVRG4 from Texas Instruments is a single, 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 - optimized for precision transducer signal conditioning in battery-powered medical instrumentation and handheld test equipment.
For engineers reviewing the OPA334AIDBVRG4 datasheet, OPA334AIDBVRG4 pinout, OPA334AIDBVRG4 application, or OPA334AIDBVRG4 equivalent, key selection criteria include guaranteed low-offset stability over temperature, rail-to-rail output swing on +2.7V to +5.5V single supply, enable-controlled power gating, and micro-size SOT-23-6 footprint for space-constrained analog front-ends.
Technical Context
The OPA334AIDBVRG4 employs auto-zeroing architecture with a time-continuous 2 MHz main amplifier corrected every 100 µs, achieving near-zero long-term drift and eliminating 1/f noise. Its input stage features ultra-low bias current (±70 pA typ) and high common-mode rejection (110 dB min), enabling accurate DC-coupled measurements in high-impedance sensor interfaces.
Shutdown mode reduces quiescent current to 2 µA while placing the output in high-impedance state; enable logic thresholds are referenced to V–, with valid high > 0.75×(V+ − V–) and valid low < 0.8 V above V–. The device operates across –40°C to +125°C and supports rail-to-rail output swing down to within 15 mV of either rail at 10 kΩ load.
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 amplifier designs |
| Offset Drift | 0.05 µV/°C max - enables stable µV-level DC measurements over industrial temperature range |
| Quiescent Current | 285 µA - supports >1-year battery life in 10 µA average-current handheld instruments |
| Supply Range | +2.7V to +5.5V - compatible with Li-ion, 3.3V, and dual-supply systems without level-shifting |
| Gain-Bandwidth | 2 MHz - sufficient for 10 kHz sensor signal bandwidth with ≥20 dB phase margin at unity gain |
| Output Swing | Rail-to-rail, 15 mV from rail (10 kΩ) - delivers full dynamic range in single-supply 0–2.5 V ADC interfaces |
| Shutdown Current | 2 µA - reduces system standby power by >99% versus active mode |
Pinout & Package
SOT-23-6 package (DBV), 2.9 mm × 1.6 mm × 1.3 mm body, JEDEC MO-178 compliant, thermal resistance θJA = 200°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - V+ | Positive Supply | Accepts +2.7V to +5.5V; requires local 0.1 µF bypass capacitor |
| 2 - –In | Inverting Input | High-impedance node (5 pF common-mode capacitance); sensitive to PCB leakage and thermocouple effects |
| 3 - Out | Output | Rail-to-rail capable; enters high-Z state during shutdown |
| 4 - V– | Negative Supply / Ground Reference | Reference point for enable logic and input common-mode range (V– – 0.1 V to V+ – 1.5 V) |
| 5 - +In | Non-inverting Input | Matched impedance to Pin 2; differential input capacitance = 1 pF |
| 6 - Enable | Digital Control Input | CMOS-compatible; drives amplifier into 2 µA shutdown when < 0.8 V above V– |
Key Features
| Feature | Design Value |
|---|---|
| Zero-Drift Auto-Zero Architecture | Eliminates 1/f noise and guarantees <0.05 µV/°C drift - critical for thermocouple and strain-gauge DC stability |
| Shutdown Mode with High-Z Output | Enables multiplexed analog buses and gated amplification without external isolation switches |
| Rail-to-Rail Output Stage | Delivers full-scale swing to within 15 mV of supply rails - maximizes dynamic range in 3.3V ADC systems |
| Ultra-Low Input Bias Current | ±70 pA typical - prevents >100 mV error across 10 MΩ source impedances in pH or photodiode circuits |
| Single-Supply Operation | Operates from +2.7V - eliminates need for negative rail in portable instrumentation and IoT sensor nodes |
Applications
| Transducer Signal Conditioning | Temperature Measurement |
|---|---|
Use Scenario: Amplifying low-level mV outputs from load cells, pressure sensors, or Wheatstone bridges in electronic scales and industrial transmitters. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with offset cancellation, rejecting common-mode noise and maintaining linearity over temperature. Use Value: 5 µV offset and 0.05 µV/°C drift ensure <0.005% measurement error across –40°C to +125°C without recalibration. | Use Scenario: Cold-junction compensation and linearization of K-type thermocouples in medical patient monitors and environmental data loggers. IC Role / Device Role / Timing Role: Low-drift buffer and reference amplifier driving ADC inputs with sub-µV thermal EMF sensitivity. Use Value: Ultra-low bias current avoids self-heating errors in high-resistance thermistor networks; rail-to-rail output matches 0–2.5 V ADC input range. |
| Medical Instrumentation | Battery-Powered Test Equipment |
Use Scenario: Front-end amplification for ECG, EEG, or glucose sensor analog paths where DC accuracy and low power are mandatory. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier with programmable gain and shutdown control synchronized to sampling intervals. Use Value: 285 µA quiescent current extends coin-cell battery life; 2 µA shutdown enables duty-cycled operation with <1 µs wake-up latency. | Use Scenario: Portable multimeters, insulation testers, and handheld oscilloscopes requiring stable gain, low noise, and minimal self-heating. IC Role / Device Role / Timing Role: Autoranging amplifier and reference buffer with fast enable/disable for automatic range switching. Use Value: 150 µs enable time allows full offset accuracy within one auto-zero cycle; SOT-23-6 footprint saves PCB area in compact enclosures. |
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; SOT-23-5 package; identical offset (5 µV max) and drift (0.05 µV/°C) | Lacks enable control - unsuitable for power-gated systems; requires redesign for pin count and layout | Select when shutdown functionality is unnecessary and board space permits removal of enable routing |
| AD8628ARTZ-REEL7 | Similar zero-drift architecture; 1 µV max offset; 0.002 µV/°C drift; higher 1.2 mA quiescent current; SOT-23-5 | Lower drift but 4× higher supply current - impractical for multi-channel battery-powered devices | Choose only when sub-µV offset stability outweighs power budget constraints |
Compared with OPA335AIDBVR and AD8628ARTZ-REEL7, the OPA334AIDBVRG4 uniquely balances ultra-low drift, integrated shutdown, and sub-300 µA quiescent current in a 6-pin micro-package - making it the optimal choice for space- and power-constrained precision analog systems requiring dynamic power management.
Availability
OPA334AIDBVRG4 is available at Aetrix Electronics and suitable for transducer signal conditioning, temperature measurement, and battery-powered instrumentation requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for OPA334AIDBVRG4 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The OPA334 family belongs to TI's Zerø-Drift Series, designed specifically for high-accuracy, low-power DC-coupled applications including medical sensors, industrial process control, and portable test equipment.
FAQ
What is the maximum operating temperature range for the OPA334AIDBVRG4?
The OPA334AIDBVRG4 is specified for operation from –40°C to +125°C, with absolute maximum junction temperature rated at +150°C. This extended range supports deployment in automotive under-hood modules, industrial motor drives, and outdoor environmental monitoring systems where ambient temperatures exceed standard commercial limits.
Does the OPA334AIDBVRG4 require external components for stable operation?
Yes - a 0.1 µF ceramic capacitor must be placed as close as possible between V+ and V– pins to ensure stability and suppress supply noise. Input protection resistors are recommended if signals exceed supply rails by >0.5 V, per TI's internal input clamp structure and 10 mA absolute maximum input current rating.
How does the enable pin of the OPA334AIDBVRG4 interface with digital logic?
The enable pin of the OPA334AIDBVRG4 is referenced to V–, not ground. A valid logic high is >0.75×(V+ − V–), up to 5.5 V above V–; a valid logic low is <0.8 V above V–. It must never be left floating - tie to V+ or V– via pull-up/down resistor if not driven actively.
Can the OPA334AIDBVRG4 drive capacitive loads without oscillation?
The OPA334AIDBVRG4 is unity-gain stable and characterized to drive ≥300 pF loads with minimal overshoot (<5%) when RL = 10 kΩ. For loads >500 pF, TI recommends adding a small series resistor (10–50 Ω) between output and capacitance to maintain phase margin and prevent peaking.
What is the typical settling time to 0.01% for the OPA334AIDBVRG4 at unity gain?
At unity gain, the OPA334AIDBVRG4 requires one complete auto-zero cycle (~100 µs) to achieve full offset accuracy after enable assertion. Total settling time to 0.01% is ~120 µs, as confirmed in the Settling Time vs Closed-Loop Gain characteristic curve in the SBOS245D datasheet.
OPA334AIDBVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
OPA334AIDBVRG4 FAQ
1.How can I place an order for OPA334AIDBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA334AIDBVRG4 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 OPA334AIDBVRG4 reliable?
The price and inventory of OPA334AIDBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA334AIDBVRG4 is usually 5 days.
3.What payment methods are accepted for OPA334AIDBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA334AIDBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA334AIDBVRG4?
OPA334AIDBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA334AIDBVRG4 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 OPA334AIDBVRG4?
For technical support, including OPA334AIDBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA334AIDBVRG4 requirements.
6.How does Aetrix verify that OPA334AIDBVRG4 is sourced from the original manufacturer or authorized distributors?
All OPA334AIDBVRG4 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 OPA334AIDBVRG4 meets industry standards.
7.What is the process for return or replacement of OPA334AIDBVRG4?
All OPA334AIDBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA334AIDBVRG4, 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 OPA334AIDBVRG4 part is unused and in its original packaging.
Return procedure for OPA334AIDBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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