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Texas Instruments OPA734AIDBVR
- Part No.:
- OPA734AIDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
OPA734AIDBVR.pdf
- Description:
- IC OPAMP ZER-DRIFT 1CIRC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,863
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Product details
Overview
OPA734AIDBVR from Texas Instruments is a single-channel, zero-drift CMOS operational amplifier in SOT-23-6 package with shutdown control, 5µV max input offset voltage, 0.05µV/°C max drift, and 750µA max quiescent current-designed for precision signal conditioning in battery-powered instrumentation.
For engineers reviewing the OPA734AIDBVR datasheet, OPA734AIDBVR pinout, OPA734AIDBVR application, or OPA734AIDBVR equivalent, key selection criteria include its rail-to-rail output swing (within 50mV of rails), low bias current (200pA max), wide supply range (2.7V to 12V), and fast enable/disable timing (150µs turn-on, 1.5µs turn-off) in micro-size packaging.
Technical Context
The OPA734AIDBVR employs auto-zeroing architecture with a time-continuous 1.6MHz main amplifier corrected every 100µs, delivering near-zero long-term drift and stable DC precision. Its CMOS input stage enables 200pA max input bias current and high input impedance across −40°C to +85°C.
It supports single-supply operation from 2.7V to 12V (±1.35V to ±6V), features rail-to-rail output swing within 50mV of supply rails, and includes a CMOS-compatible enable pin referenced to V− with logic HIGH > (V−)+2V and logic LOW < (V−)+0.8V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 5µV (max) - ensures ≤0.0005% error in 1V full-scale precision gain stages |
| Offset Drift | 0.05µV/°C (max) - maintains sub-µV stability over industrial temperature range |
| Quiescent Current | 750µA (max) - enables multi-year battery life in handheld test equipment |
| Supply Range | 2.7V to 12V - supports direct operation from single Li-ion, dual AA, or regulated 3.3V/5V rails |
| Gain-Bandwidth Product | 1.6MHz - sufficient for anti-aliasing filters and sensor signal chains up to ~100kHz |
| Output Swing | Within 50mV of rails (RL = 10kΩ) - maximizes dynamic range in low-voltage systems |
| Enable Turn-On Time | 150µs - includes one full auto-zero cycle for guaranteed VOS accuracy on wake-up |
Pinout & Package
SOT-23-6 package (DBV), 1.45mm max height, JEDEC MO-178 compliant; pin 1 marked by index area, gage plane defined per drawing DBV0005A.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Enable) | Digital control input | CMOS-compatible shutdown pin; logic HIGH > (V−)+2V enables amplifier; open-circuit defaults to active |
| 2 (V+) | Positive supply | Accepts 2.7V–12V; absolute max +13.2V; requires local 0.1µF bypass capacitor |
| 3 (Out) | Analog output | Rail-to-rail swing (within 50mV); high-impedance when disabled |
| 4 (V−) | Negative supply / ground reference | Reference for Enable pin; supports single- or split-supply operation down to −1.35V |
| 5 (−IN) | Inverting input | High-impedance CMOS node; common-mode range extends to (V−)−0.1V |
| 6 (+IN) | Non-inverting input | High-impedance CMOS node; matched to −IN for thermoelectric error cancellation |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-zero architecture | Eliminates thermal and time-dependent offset drift-critical for DC-coupled transducer interfaces |
| Shutdown mode with 9µA max IQSD | Reduces system standby power by >99% vs active mode; enables duty-cycled sensing |
| Rail-to-rail output swing | Preserves full ADC input range in 3.3V systems without level-shifting circuitry |
| Low input bias current (200pA max) | Minimizes voltage error across high-impedance sources like thermistors or pH electrodes |
| 1.6MHz GBW with unity-gain stability | Supports precision filtering and closed-loop bandwidths up to 100kHz without phase reversal |
Applications
| Transducer Signal Conditioning | Medical Instrumentation |
|---|---|
|
Use Scenario: Amplifying µV-level outputs from load cells, strain gauges, or pressure sensors in electronic scales. IC Role / Device Role / Timing Role: Primary front-end gain stage with ultra-low offset and drift to preserve measurement resolution. Use Value: Enables 24-bit effective resolution in weigh-scale systems by limiting offset contribution to <0.5µV over temperature. |
Use Scenario: Front-end amplification of ECG, EEG, or biopotential signals in portable patient monitors. IC Role / Device Role / Timing Role: DC-coupled, low-noise, low-drift buffer for analog front-end before ADC sampling. Use Value: Maintains baseline stability and eliminates thermal drift artifacts during multi-hour clinical sessions. |
| Battery-Powered Test Equipment | Temperature Measurement Systems |
|
Use Scenario: Precision voltage reference buffering and sensor excitation in handheld multimeters or calibrators. IC Role / Device Role / Timing Role: Low-quiescent-current amplifier enabling >1000-hour battery life while maintaining calibration-grade accuracy. Use Value: Delivers 5µV offset stability across battery discharge curve (3.6V → 2.8V), eliminating recalibration needs. |
Use Scenario: Cold-junction compensation and linearization in thermocouple-based temperature measurement modules. IC Role / Device Role / Timing Role: High-impedance, low-drift amplifier for thermistor bridge outputs and reference voltage scaling. Use Value: Reduces temperature measurement error to <0.05°C over −40°C to +85°C due to 0.05µV/°C drift spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA735AIDBVR | No shutdown pin; SOT-23-5 package; identical offset (5µV max), drift (0.05µV/°C), and quiescent current (750µA) | Lacks enable control; suitable only where continuous operation is acceptable | Select when board space is constrained and shutdown functionality is unnecessary |
| AD8628ARJZ-REEL7 | Zero-drift chopper architecture; 1µV max offset; 0.002µV/°C drift; 850µA quiescent current; SOT-23-5 | Lower drift but no shutdown; higher IQ; not pin-compatible; requires layout revision | Choose for ultra-low drift requirements where power budget allows +100µA overhead |
Compared with OPA734AIDBVR, OPA735AIDBVR saves one pin and PCB footprint but forfeits power gating, while AD8628ARJZ-REEL7 offers superior drift performance at the cost of higher supply current and non-interchangeable pinout.
Availability
OPA734AIDBVR is available at Aetrix Electronics and suitable for transducer signal conditioning, medical instrumentation, and battery-powered test equipment requiring stable component supply, RoHS-compliant green packaging, and extended temperature support (−40°C to +85°C).
Supply support for OPA734AIDBVR 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 signal-chain solutions.
The OPA734 family belongs to TI's Zerø-Drift Series, engineered specifically for high-accuracy, low-power DC signal conditioning in portable and industrial instrumentation where offset and drift directly impact measurement integrity.
FAQ
What is the maximum supply voltage for OPA734AIDBVR?
The absolute maximum supply voltage for OPA734AIDBVR is +13.2V. Operation above this rating may cause permanent damage. The recommended operating range is +2.7V to +12V (±1.35V to ±6V), and all electrical specifications-including offset voltage, drift, and quiescent current-are guaranteed within this window. Exceeding +13.2V violates absolute maximum ratings and voids warranty coverage.
Does OPA734AIDBVR require external capacitors for stability?
Yes, OPA734AIDBVR requires a 0.1µF ceramic capacitor placed as close as possible between V+ and V− pins for stable operation. This decoupling capacitor suppresses supply noise and prevents oscillation, especially under varying load conditions. Layout guidelines also recommend minimizing trace lengths and using a solid ground plane-both critical for preserving the device's 5µV offset and 0.05µV/°C drift performance.
How does the enable function behave during power-up of OPA734AIDBVR?
Upon power-up, OPA734AIDBVR enters active mode if the Enable pin is left floating (internal pull-up asserts logic HIGH). Full offset voltage accuracy is achieved after one complete auto-zero cycle (~100µs) plus bias circuit start-up time. During this initial period, the amplifier operates but with unspecified offset. The 150µs specified tON includes both startup and auto-zero settling to guarantee 5µV max VOS.
Can OPA734AIDBVR drive capacitive loads?
OPA734AIDBVR can drive moderate capacitive loads, but stability depends on load value and feedback configuration. Typical overshoot data shows <5% for ≤100pF; beyond that, external compensation (e.g., series resistor at output) is recommended. For loads >500pF, consult Figure 7 in the SBOS282B datasheet for verified 3-pole filter implementations using OPA734AIDBVR to maintain phase margin and avoid ringing.
What is the input common-mode voltage range of OPA734AIDBVR?
The input common-mode voltage range of OPA734AIDBVR is (V−) − 0.1V to (V+) − 1.5V. For example, with V− = 0V and V+ = 5V, inputs must stay within −0.1V to +3.5V. Operating outside this range degrades CMRR and may cause unpredictable output behavior. Input clamping diodes limit fault current to ±10mA if signals exceed rails by >0.5V-external current-limiting resistors are required in such cases.
OPA734AIDBVR 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:
- 1.5V/µs
- Gain Bandwidth Product:
- 1.6 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 600µA
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
OPA734AIDBVR FAQ
1.How can I place an order for OPA734AIDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA734AIDBVR 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 OPA734AIDBVR reliable?
The price and inventory of OPA734AIDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA734AIDBVR is usually 5 days.
3.What payment methods are accepted for OPA734AIDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA734AIDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA734AIDBVR?
OPA734AIDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA734AIDBVR 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 OPA734AIDBVR?
For technical support, including OPA734AIDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA734AIDBVR requirements.
6.How does Aetrix verify that OPA734AIDBVR is sourced from the original manufacturer or authorized distributors?
All OPA734AIDBVR 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 OPA734AIDBVR meets industry standards.
7.What is the process for return or replacement of OPA734AIDBVR?
All OPA734AIDBVR units undergo pre-shipment inspection (PSI). If there is an issue with OPA734AIDBVR, 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 OPA734AIDBVR part is unused and in its original packaging.
Return procedure for OPA734AIDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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