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Texas Instruments OPA2734AIDGST
- Part No.:
- OPA2734AIDGST
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2734AIDGST.pdf
- Description:
- IC OPAMP ZER-DRIFT 2CIRC 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,346
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Product details
Overview
OPA2734AIDGST from Texas Instruments is a dual, zero-drift CMOS operational amplifier with shutdown capability, designed for precision DC-coupled signal conditioning in low-power, single-supply systems. It delivers 5µV max offset voltage, 0.05µV/°C max drift, 750µA max quiescent current per amplifier, rail-to-rail output swing within 50mV of rails, and operates from 2.7V to 12V supply. It is used in battery-powered medical instrumentation and high-accuracy transducer interfaces.
For engineers reviewing the OPA2734AIDGST datasheet, OPA2734AIDGST pinout, OPA2734AIDGST application, or OPA2734AIDGST equivalent, this page provides verified specifications, MSOP-10 package details, real-world use cases in temperature sensing and electronic scales, and validated alternative parts for design continuity and sourcing flexibility.
Technical Context
The OPA2734AIDGST employs auto-zeroing architecture with a time-continuous 1.6MHz main amplifier corrected every 100µs, enabling simultaneous ultra-low offset and near-zero drift. Its dual-channel layout includes independent CMOS-compatible enable inputs (Enable A and Enable B), each supporting logic-controlled shutdown with 9µA max standby current per amplifier and 1.5µs disable time.
Input common-mode range extends from (V−) − 0.1V to (V+) − 1.5V; output swings rail-to-rail within 50mV under 10kΩ load. The device achieves 115dB min open-loop gain, 1.6MHz gain-bandwidth product, and 1.5V/µs slew rate - optimized for unity-gain stable, low-noise (<2.5µVPP, 0.1–10Hz) precision amplification in DC-critical paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 5µV (max) - ensures sub-mV error in mV-level sensor outputs without calibration. |
| Drift vs Temperature | 0.05µV/°C (max) - maintains accuracy across industrial −40°C to +85°C operating range. |
| Quiescent Current | 750µA per amplifier (max) - enables multi-day operation on coin-cell batteries in handheld test gear. |
| Supply Range | 2.7V to 12V (single or ±1.35V to ±6V) - supports direct interfacing with Li-ion, 3.3V, and 5V rails. |
| Output Swing | Within 50mV of rails (RL = 10kΩ) - maximizes dynamic range in low-voltage ADC driver applications. |
| Enable Logic Threshold | VH ≥ (V−) + 2V, VL ≤ (V−) + 0.8V - compatible with standard 3.3V/5V GPIO without level-shifting. |
| Shutdown Current | 9µA per amplifier (max) - reduces system idle power by >98% versus active mode. |
Pinout & Package
OPA2734AIDGST is packaged in a 10-pin VSSOP (MSOP-10) with 0.5mm pitch, 3.0mm × 3.0mm body, and 1.45mm max height - optimized for space-constrained PCB layouts in portable instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Enable A) | Digital input for Channel A | CMOS-compatible shutdown control; open-circuit defaults to enabled state. |
| 2 (+IN A) | Inverting input for Channel A | High-impedance (±200pA bias current) node for precision differential sensing. |
| 3 (−IN A) | Non-inverting input for Channel A | Matches +IN A in bias current and thermal coefficient for minimal offset drift. |
| 4 (OUT A) | Amplifier A output | Rail-to-rail capable; enters high-impedance state during shutdown. |
| 5 (V−) | Negative supply rail | Reference for all inputs, outputs, and enable logic; supports single- or split-supply operation. |
| 6 (V+) | Positive supply rail | Accepts 2.7V–12V; absolute max 13.2V - requires external 0.1µF bypass capacitor. |
| 7 (OUT B) | Amplifier B output | Independent output; high-impedance when Enable B is low. |
| 8 (−IN B) | Non-inverting input for Channel B | Electrically matched to Channel A inputs for dual-channel common-mode rejection. |
| 9 (+IN B) | Inverting input for Channel B | Same low-bias-current, low-drift characteristics as Channel A inputs. |
| 10 (Enable B) | Digital input for Channel B | Independent control enables selective channel gating in multiplexed analog front-ends. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-zeroing | 0.05µV/°C max drift eliminates thermal calibration in temperature measurement circuits. |
| Rail-to-rail output | Swings within 50mV of supply rails at 10kΩ load - preserves full-scale resolution for 12-bit+ ADCs. |
| Independent dual-channel shutdown | Per-amplifier enable pins reduce system power by selectively disabling unused channels. |
| Low input bias current | 200pA max enables high-impedance sensor interfacing (e.g., thermopiles, pH electrodes) without signal loss. |
| 1.6MHz GBW with unity-gain stability | Supports fast settling in precision filter and rectifier applications without external compensation. |
| ESD robustness | 2000V HBM rating protects against handling damage in automated assembly and field service. |
Applications
| Transducer Signal Conditioning | Temperature Measurement Systems |
|---|---|
|
Use Scenario: Amplifying µV-level outputs from load cells, strain gauges, or pressure sensors in electronic scales. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with programmable gain and low-noise DC coupling. Use Value: 5µV offset and 0.05µV/°C drift ensure <0.01% full-scale error over temperature - eliminating factory recalibration. |
Use Scenario: Cold-junction compensation and linearization in thermocouple-based temperature monitors. IC Role / Device Role / Timing Role: Low-drift buffer and reference voltage conditioner for thermistor networks and ADC reference paths. Use Value: Sub-µV drift prevents thermal gradient-induced errors in medical-grade patient temperature readings. |
| Medical Instrumentation | Battery-Powered Test Equipment |
|
Use Scenario: Signal acquisition in portable ECG, pulse oximeter, or glucose meter analog front-ends. IC Role / Device Role / Timing Role: Dual-channel amplifier for simultaneous lead I/II/III derivation and sensor biasing. Use Value: 750µA per amplifier enables >100-hour runtime on CR2032; shutdown cuts idle current to 9µA. |
Use Scenario: Front-end amplification and filtering in handheld multimeters and oscilloscope probes. IC Role / Device Role / Timing Role: High-precision, low-power gain stage with selectable channel enable for auto-ranging. Use Value: Rail-to-rail output and 2.7V minimum supply allow direct interface with 3.3V microcontrollers and SAR ADCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDGSR | Lower quiescent current (17µA vs 750µA), no shutdown, same MSOP-8 package (8-pin vs 10-pin). | Lacks independent dual-channel enable; suited for always-on ultra-low-power designs, not gated architectures. | Select when minimizing active current dominates over channel control flexibility. |
| AD8629ARZ | Higher offset (25µV max), no shutdown, SOIC-8 package; 1.5MHz GBW, 1.5V/µs slew rate. | Single-supply operation supported but lacks enable logic - requires external FET switching for power gating. | Choose when legacy SOIC footprint compatibility is required and shutdown is implemented externally. |
Compared with OPA2734AIDGST, OPA2333AIDGSR trades shutdown capability for 44× lower active current, while AD8629ARZ offers pin-compatible SOIC-8 packaging but requires external circuitry to achieve equivalent power management functionality.
Availability
OPA2734AIDGST is available at Aetrix Electronics and suitable for electronic scales, medical instrumentation, and battery-powered test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for OPA2734AIDGST 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 OPA2734AIDGST belongs to TI's Zerø-Drift Series, engineered specifically for high-accuracy, low-power DC signal conditioning in portable and industrial measurement systems where offset and drift directly impact measurement integrity.
FAQ
What is the maximum supply voltage for the OPA2734AIDGST?
The OPA2734AIDGST has an absolute maximum supply voltage of +13.2V. Operation beyond this rating may cause permanent damage. The recommended operating range is +2.7V to +12V (or ±1.35V to ±6V for split supplies). Designers must include appropriate overvoltage protection and ensure bypass capacitors are placed close to the V+ and V− pins to maintain stability.
Does the OPA2734AIDGST require external components for stable operation?
Yes - a 0.1µF ceramic capacitor must be placed directly across the V+ and V− supply pins, as specified in TI's layout guidelines. This minimizes supply noise and prevents oscillation. Input protection resistors are recommended if signals exceed the supply rails by more than 0.5V, limiting current to ≤10mA per input terminal per the absolute maximum ratings.
How does the auto-zeroing architecture affect the OPA2734AIDGST's response to fast input steps?
The OPA2734AIDGST's auto-zero correction cycle occurs every 100µs. For low-gain (<20) configurations, one full cycle may be needed to correct common-mode rejection errors after large input steps. This results in ~100µs settling to full VOS accuracy - critical for precision data acquisition timing budgets but transparent in steady-state DC applications.
Can the OPA2734AIDGST drive capacitive loads without instability?
The OPA2734AIDGST is unity-gain stable but exhibits increasing overshoot with capacitive loads above ~100pF. Typical Characteristics show >5% overshoot at 1000pF. For loads >100pF, add a small series resistor (e.g., 10–50Ω) between the output and load capacitance to isolate the pole and restore phase margin - verified in TI's application notes for bridge amplifier and filter circuits.
What is the thermal resistance (θJA) of the OPA2734AIDGST in its MSOP-10 package?
The OPA2734AIDGST in the MSOP-10 (DGS) package has a junction-to-ambient thermal resistance (θJA) of 150°C/W, as specified in the Electrical Characteristics table. This value assumes standard JEDEC 2-layer board conditions. Layout improvements - such as adding thermal vias under the exposed pad (if present) and copper pour - can significantly reduce effective θJA in production designs.
OPA2734AIDGST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 2
- 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 (x2 Channels)
- 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:
- 10-VSSOP
OPA2734AIDGST FAQ
1.How can I place an order for OPA2734AIDGST through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2734AIDGST 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 OPA2734AIDGST reliable?
The price and inventory of OPA2734AIDGST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2734AIDGST is usually 5 days.
3.What payment methods are accepted for OPA2734AIDGST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2734AIDGST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2734AIDGST?
OPA2734AIDGST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2734AIDGST 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 OPA2734AIDGST?
For technical support, including OPA2734AIDGST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2734AIDGST requirements.
6.How does Aetrix verify that OPA2734AIDGST is sourced from the original manufacturer or authorized distributors?
All OPA2734AIDGST 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 OPA2734AIDGST meets industry standards.
7.What is the process for return or replacement of OPA2734AIDGST?
All OPA2734AIDGST units undergo pre-shipment inspection (PSI). If there is an issue with OPA2734AIDGST, 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 OPA2734AIDGST part is unused and in its original packaging.
Return procedure for OPA2734AIDGST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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