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Texas Instruments OPA734AIDBVT
- Part No.:
- OPA734AIDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
OPA734AIDBVT.pdf
- Description:
- IC OPAMP ZER-DRIFT 1CIRC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:778
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Product details
Overview
OPA734AIDBVT from Texas Instruments is a single-channel, zero-drift CMOS operational amplifier in SOT-23-6 package with shutdown control, 5µV max offset voltage, 0.05µV/°C max drift, 750µA max quiescent current, and rail-to-rail output swing within 50mV of rails-designed for precision signal conditioning in battery-powered instrumentation.
For engineers reviewing the OPA734AIDBVT datasheet, OPA734AIDBVT pinout, OPA734AIDBVT application, or OPA734AIDBVT equivalent, key selection criteria include ultra-low offset stability over temperature, shutdown-enabled power gating for portable systems, and verified performance in transducer front-ends requiring <1µV/°C thermal error contribution.
Technical Context
The OPA734AIDBVT implements auto-zeroing architecture with continuous-time 1.6MHz main amplifier and 100µs correction cycle, enabling simultaneous low offset (5µV max) and near-zero drift (0.05µV/°C max). Its CMOS input stage delivers 200pA max bias current and supports common-mode range from (V−) − 0.1V to (V+) − 1.5V.
Integrated shutdown logic referenced to V− accepts CMOS-compatible enable signals (logic HIGH > V− + 2V), reducing supply current to 9µA max while placing output in high-impedance state. The device operates across 2.7V to 12V single supply or ±1.35V to ±6V dual supply, with specified performance from −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 5µV maximum - ensures ≤0.001% gain error in 0.5V full-scale sensor outputs without calibration. |
| Drift vs Temperature | 0.05µV/°C maximum - contributes <0.4µV total error over 80°C industrial range, critical for thermocouple amplifiers. |
| Quiescent Current | 750µA maximum per amplifier - enables >1-year battery life in 10µA-average-power handheld test equipment. |
| Shutdown Current | 9µA maximum - reduces standby power by 83× versus active mode, essential for duty-cycled data loggers. |
| Input Bias Current | 200pA maximum - preserves accuracy in high-impedance pH electrode or piezoelectric sensor interfaces. |
| Supply Range | 2.7V to 12V single supply - supports direct operation from Li-ion (3.0–4.2V), 5V rails, or 9V batteries without regulation. |
| Output Swing | Rail-to-rail within 50mV - delivers full dynamic range into ADCs with 0–VCC input ranges, e.g., ADS1100. |
Pinout & Package
SOT-23-6 package (DBV), 1.45mm max height, JEDEC MO-178 compliant, with exposed pad not electrically connected. Pin 1 identified by index area marking "NSB".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Enable) | Digital shutdown control input | CMOS-compatible logic input referenced to V−; HIGH (> V− + 2V) enables amplifier, LOW (< V− + 0.8V) disables output and reduces IQ to 9µA. |
| 2 (V−) | Negative supply terminal | Reference node for enable logic and analog circuitry; must be stable and low-impedance for accurate shutdown threshold. |
| 3 (Out) | Analog output terminal | Rail-to-rail capable output driving ≥10kΩ load; high-impedance when disabled, enabling multiplexed analog buses. |
| 4 (V+) | Positive supply terminal | Accepts 2.7V–12V single supply or positive rail of dual supply; requires 0.1µF ceramic capacitor placed adjacent to pin. |
| 5 (−IN) | Inverting input terminal | High-impedance CMOS node; common-mode range extends to (V+) − 1.5V, limiting usable input headroom at low supplies. |
| 6 (+IN) | Non-inverting input terminal | Matches −IN characteristics; differential input capacitance is 2pF, minimizing phase shift in high-frequency feedback networks. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-zeroing architecture | Continuous 1.6MHz signal path with 100µs offset correction cycle eliminates long-term drift and 1/f noise without external components. |
| Rail-to-rail output | Swings within 50mV of V+ and V− rails at 10kΩ load, maximizing dynamic range into single-supply ADCs and comparators. |
| Low-input-bias-current CMOS inputs | 200pA max bias current enables use with >100MΩ source impedances in medical ECG front-ends and strain-gauge bridges. |
| Shutdown mode with fast recovery | 1.5µs disable time and 150µs enable time (including one auto-zero cycle) supports microsecond-level power gating in burst-mode sensors. |
| Wide supply range | 2.7V–12V operation allows direct interface with unregulated battery sources, eliminating need for LDOs in space-constrained designs. |
Applications
| Transducer Signal Conditioning | Medical Instrumentation |
|---|---|
Use Scenario: Amplifying µV-level outputs from load cells, pressure sensors, or thermopiles with minimal offset-induced baseline drift. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with auto-zero correction ensuring stable 24-hour baseline in electronic scales. Use Value: 5µV max offset and 0.05µV/°C drift prevent false weight readings under ambient temperature shifts in clinical weighing systems. |
Use Scenario: Front-end amplification of biopotential signals (ECG, EEG) where input impedance and DC stability directly impact diagnostic accuracy. IC Role / Device Role / Timing Role: High-Z, low-noise instrumentation amplifier input stage rejecting common-mode interference while preserving microvolt-level signal integrity. Use Value: 200pA max input bias current avoids electrode polarization errors; rail-to-rail output drives 16-bit SAR ADCs without level-shifting circuitry. |
| Battery-Powered Test Equipment | Temperature Measurement Systems |
Use Scenario: Portable multimeters and handheld oscilloscopes requiring extended runtime and stable zero-reference during intermittent sampling. IC Role / Device Role / Timing Role: Auto-zeroed buffer and reference amplifier enabling true 0V baseline hold between measurements. Use Value: 750µA active current and 9µA shutdown current allow >5000 measurements per AA cell; 150µs wake-up ensures responsive user interface. |
Use Scenario: Cold-junction compensation and linearization in RTD or thermistor-based temperature sensors deployed in HVAC or industrial controllers. IC Role / Device Role / Timing Role: Precision voltage follower and excitation current source delivering stable 1mA through 100Ω Pt100 elements. Use Value: 0.05µV/°C drift contributes <0.02°C error over 40°C span, meeting Class A RTD accuracy requirements without software correction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA735AIDBVT | No shutdown pin; SOT-23-5 package; identical offset (5µV max) and drift (0.05µV/°C) specs. | Lacks power-gating capability; suitable only for always-on precision stages where board space is constrained. | Select when shutdown functionality is unnecessary and PCB real estate is premium-reduces component count by eliminating external enable logic. |
| AD8628ARTZ-REEL7 | Zero-drift chopper architecture; 1µV max offset; 0.002µV/°C typical drift; 1.2mA quiescent current; SOT-23-5. | Higher IQ limits battery life; superior drift performance benefits ultra-stable references but adds clock feedthrough risk in sensitive analog paths. | Choose for sub-µV offset-critical applications like precision DAC buffers where 0.002µV/°C drift outweighs 47% higher supply current penalty. |
Compared with OPA734AIDBVT, OPA735AIDBVT removes shutdown control to save one pin and reduce package size, while AD8628ARTZ-REEL7 trades higher quiescent current for lower drift and offset-but introduces potential 100kHz clock feedthrough requiring careful layout mitigation.
Availability
OPA734AIDBVT is available at Aetrix Electronics and suitable for transducer signal conditioning, medical instrumentation, and battery-powered test equipment requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for OPA734AIDBVT 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 over 50 years of innovation in precision signal chain solutions.
The OPA734AIDBVT belongs to TI's Zerø-Drift Series of operational amplifiers, engineered specifically for high-accuracy DC-coupled measurement systems where offset stability over time and temperature is non-negotiable.
FAQ
What is the maximum allowable supply voltage for OPA734AIDBVT?
The absolute maximum supply voltage for OPA734AIDBVT is +13.2V. Operation above this rating risks permanent damage. The device is specified for reliable operation across 2.7V to 12V single supply or ±1.35V to ±6V dual supply, with all electrical characteristics guaranteed from −40°C to +85°C. Exceeding 12V may degrade long-term reliability even if below the 13.2V absolute limit.
How does the enable/shutdown function operate on OPA734AIDBVT?
The OPA734AIDBVT enable pin is CMOS-compatible and referenced to V−. A logic HIGH (> V− + 2V) activates the amplifier; a logic LOW (< V− + 0.8V) places it in shutdown mode with 9µA max current and high-impedance output. The enable pin has internal pull-up, so leaving it open defaults to active mode. Disable time is 1.5µs; enable time is 150µs including one full auto-zero cycle.
Can OPA734AIDBVT drive capacitive loads, and what is the recommended limit?
OPA734AIDBVT is unity-gain stable but exhibits increasing overshoot with capacitive loads. Typical characteristics show ≤5% overshoot up to 100pF and ≤20% at 1000pF. For robust stability, TI recommends limiting capacitive load to ≤100pF without isolation resistance. If larger loads are unavoidable, add a 10Ω–100Ω series resistor between output and capacitance to dampen ringing.
What is the input common-mode voltage range for OPA734AIDBVT?
The input common-mode voltage range for OPA734AIDBVT is (V−) − 0.1V to (V+) − 1.5V. At 5V supply, this spans −0.1V to +3.5V; at 2.7V supply, it narrows to −0.1V to +1.2V. Inputs exceeding this range degrade CMRR and may cause phase reversal. For single-supply operation with ground-referenced signals, biasing inputs to V+/2 using resistive dividers maintains optimal CMRR performance.
Does OPA734AIDBVT require external components for stable operation?
Yes-TI mandates a 0.1µF ceramic capacitor placed as close as possible between V+ and V− pins to suppress supply noise and ensure stability. No other external components are required for basic operation. However, for optimal precision, use matched low-thermoelectric-coefficient PCB traces, avoid temperature gradients near inputs, and shield input nodes from airflow to minimize Seebeck-effect errors.
OPA734AIDBVT 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
OPA734AIDBVT FAQ
1.How can I place an order for OPA734AIDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA734AIDBVT 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 OPA734AIDBVT reliable?
The price and inventory of OPA734AIDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA734AIDBVT is usually 5 days.
3.What payment methods are accepted for OPA734AIDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA734AIDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA734AIDBVT?
OPA734AIDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA734AIDBVT 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 OPA734AIDBVT?
For technical support, including OPA734AIDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA734AIDBVT requirements.
6.How does Aetrix verify that OPA734AIDBVT is sourced from the original manufacturer or authorized distributors?
All OPA734AIDBVT 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 OPA734AIDBVT meets industry standards.
7.What is the process for return or replacement of OPA734AIDBVT?
All OPA734AIDBVT units undergo pre-shipment inspection (PSI). If there is an issue with OPA734AIDBVT, 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 OPA734AIDBVT part is unused and in its original packaging.
Return procedure for OPA734AIDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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