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Texas Instruments OPA2734AIDGSR
- Part No.:
- OPA2734AIDGSR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2734AIDGSR.pdf
- Description:
- IC OPAMP ZER-DRIFT 2CIRC 10VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,600
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Product details
Overview
OPA2734AIDGSR from Texas Instruments is a dual, zero-drift, rail-to-rail output CMOS operational amplifier with shutdown capability, specified for −40°C to +85°C operation. It delivers 5µV max input offset voltage, 0.05µV/°C max drift, 750µA max quiescent current per amplifier, 1.6MHz gain-bandwidth, and 1.5V/µs slew rate - enabling high-precision signal conditioning in battery-powered instrumentation.
For engineers reviewing the OPA2734AIDGSR datasheet, OPA2734AIDGSR pinout, OPA2734AIDGSR application, or OPA2734AIDGSR equivalent, key selection criteria include its dual-channel shutdown control, microsize MSOP-10 package, low-voltage single-supply operation (2.7V to 12V), and guaranteed rail-to-rail output swing within 50mV of rails.
Technical Context
The OPA2734AIDGSR employs auto-zeroing architecture with a time-continuous 1.6MHz main amplifier corrected every 100µs, ensuring stable 5µV max offset and near-zero thermal drift. Its dual independent enable inputs support per-amplifier shutdown, reducing total supply current to 9µA max per channel in standby.
Input common-mode range extends from (V−) − 0.1V to (V+) − 1.5V, and rail-to-rail output swing is maintained under 10kΩ load. The device is unity-gain stable and immune to output phase reversal, supporting precision DC-coupled applications without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 5µV max - enables sub-10ppm accuracy in 16-bit+ measurement systems without calibration. |
| Drift vs Temp | 0.05µV/°C max - ensures <1µV total drift over full −40°C to +85°C range, critical for unattended sensors. |
| Quiescent Current | 750µA max per amp - supports >1-year battery life in handheld test equipment at 3V supply. |
| Supply Range | 2.7V to 12V single-supply - operates directly from Li-ion, 3.3V, or 5V rails without level-shifting. |
| GBW / Slew Rate | 1.6MHz / 1.5V/µs - sufficient for 1kHz sensor interfaces with <0.1% settling error in 16-bit systems. |
| Output Swing | Within 50mV of rails (RL = 10kΩ) - maximizes dynamic range in low-voltage ADC driver stages. |
| Shutdown Current | 9µA max per amplifier - reduces system idle power by >98% versus active mode. |
Pinout & Package
OPA2734AIDGSR 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.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Enable A) | Digital enable input for Amplifier A | CMOS-compatible logic input; > (V−) + 2V enables, < (V−) + 0.8V disables; internal pull-up allows open-circuit default-enable. |
| 2 (V+) | Positive supply rail | Accepts 2.7V to 12V; absolute max +13.2V; requires local 0.1µF bypass capacitor. |
| 3 (Out B) | Inverting amplifier output B | Rail-to-rail output capable of sourcing/sinking ±20mA; high-impedance when Enable B = LOW. |
| 4 (−IN B) | Inverting input B | High-impedance CMOS input (±200pA max bias); voltage must stay within (V−) − 0.1V to (V+) − 1.5V. |
| 5 (+IN B) | Non-inverting input B | Matches −IN B characteristics; thermally balanced layout required to avoid Seebeck-induced offset errors. |
| 6 (Enable B) | Digital enable input for Amplifier B | Independent of Enable A; supports asymmetric power gating in multi-channel systems. |
| 7 (Out A) | Inverting amplifier output A | Functionally identical to Out B; supports multiplexed analog bus architectures when disabled. |
| 8 (−IN A) | Inverting input A | Electrically and thermally matched to +IN A; differential pair used in bridge amplifier configurations. |
| 9 (+IN A) | Non-inverting input A | Paired with −IN A for precision instrumentation amplifier front-ends with >130dB CMRR. |
| 10 (V−) | Negative supply rail | Supports single-supply (ground-referenced) or split-supply (±1.35V to ±6V) operation. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-zero topology | Eliminates thermally induced offset drift, enabling stable DC gain in temperature-variable environments. |
| Independent dual shutdown control | Per-amplifier enable pins allow selective power gating - e.g., keep one channel active for wake-up monitoring while disabling the other. |
| Rail-to-rail output swing | Delivers full-scale signal headroom into 10kΩ loads, preserving SNR in low-voltage ADC driver stages. |
| Low input bias current | ±200pA max enables high-impedance sensor interfacing (e.g., thermopiles, pH electrodes) without significant loading error. |
| Unity-gain stability | Operates reliably at G = 1 without external compensation, simplifying design of precision buffer and gain stages. |
Applications
| Transducer Signal Conditioning | Medical Instrumentation |
|---|---|
Use Scenario: Amplifying µV-level outputs from load cells, strain gauges, or pressure transducers in electronic scales. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with dual-channel differential gain and offset nulling. Use Value: 5µV max offset and 0.05µV/°C drift ensure ≤0.005% full-scale error over temperature - meeting Class III scale accuracy requirements. | Use Scenario: Front-end amplification of ECG, EEG, or pulse oximeter sensor signals in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-noise, low-drift gain stage preceding 16-bit SAR ADCs with DC-coupled acquisition. Use Value: 750µA/quiescent current and shutdown mode extend battery life beyond 72 hours in Class II medical handheld units. |
| Battery-Powered Test Equipment | Temperature Measurement Systems |
Use Scenario: Input buffer and programmable-gain stage in handheld multimeters or data loggers. IC Role / Device Role / Timing Role: Dual-channel configurable amplifier supporting both voltage and current measurement modes. Use Value: Independent shutdown enables automatic power cycling between measurement functions - reducing average system current by 92%. | Use Scenario: Cold-junction compensation and linearization amplifier for thermocouple-based industrial temperature controllers. IC Role / Device Role / Timing Role: Precision reference buffer and ratiometric gain stage for RTD/thermistor bridges. Use Value: Rail-to-rail output swing preserves full 0–100°C measurement range on 3.3V supplies without level-shifting circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2333AIDR | Lower IQ (17µA/ch), no shutdown, SO-8 only; 0.1µV/°C drift (vs 0.05µV/°C) | Lacks per-channel enable; unsuitable for asymmetric power management | Select when ultra-low quiescent current outweighs need for shutdown control and tighter drift spec. |
| AD8629ARZ | Single-supply rated 2.7V–5.5V only; 1µV max offset; no shutdown; SO-8 package | Not rated for 12V operation; lacks dual enable functionality | Choose for cost-sensitive, fixed 3.3V/5V systems where 12V headroom and independent shutdown are unnecessary. |
Compared with OPA2734AIDGSR, OPA2333AIDR trades shutdown capability and superior drift for lower quiescent current, while AD8629ARZ offers comparable precision but lacks voltage range flexibility and power-gating features - making OPA2734AIDGSR optimal for battery-powered, multi-range, and thermally demanding instrumentation.
Availability
OPA2734AIDGSR is available at Aetrix Electronics and suitable for transducer signal conditioning, medical instrumentation, battery-powered test equipment, and temperature measurement systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA2734AIDGSR 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The OPA2734AIDGSR belongs to TI's Zerø-Drift Series of precision op amps, designed specifically for high-accuracy DC-coupled applications where long-term offset stability and minimal thermal drift are mandatory - including sensor interfaces, precision instrumentation, and portable measurement systems.
FAQ
What is the maximum supply voltage rating for the OPA2734AIDGSR?
The OPA2734AIDGSR has an absolute maximum supply voltage of +13.2V across V+ to V−. Operation above this voltage risks permanent damage. The recommended operating range is +2.7V to +12V (or ±1.35V to ±6V for split supplies), with all electrical specifications guaranteed within that window. Exceeding +13.2V violates absolute maximum ratings and voids warranty coverage.
Does the OPA2734AIDGSR require external compensation for unity-gain stability?
No, the OPA2734AIDGSR is internally compensated and unity-gain stable. It does not require external capacitors or resistors to maintain stability at G = 1. This is confirmed in the Applications Information section of the datasheet, which explicitly states "unity-gain stable and free from unexpected output phase reversal." External compensation may degrade performance or introduce instability.
How does the shutdown function affect output state in the OPA2734AIDGSR?
When either Enable A or Enable B is driven LOW (logic < (V−) + 0.8V), the corresponding amplifier enters shutdown mode: its output transitions to a high-impedance (Hi-Z) state, and quiescent current drops to ≤9µA per channel. The output does not short or clamp - it floats - enabling safe multiplexing onto shared analog buses without cross-talk or loading.
What is the typical input bias current of the OPA2734AIDGSR at room temperature?
The typical input bias current of the OPA2734AIDGSR at +25°C is ±100pA, with a maximum specification of ±200pA over the full −40°C to +85°C temperature range. This ultra-low bias current enables direct interfacing with high-impedance sources such as thermopiles, piezoelectric sensors, and pH electrodes without significant signal attenuation or offset error.
Can the OPA2734AIDGSR drive capacitive loads, and what is the recommended limit?
The OPA2734AIDGSR can safely drive capacitive loads up to 100pF without external isolation resistance. For loads >100pF, a series resistor (typically 10Ω–100Ω) should be placed between the output and capacitance to maintain phase margin and prevent peaking or oscillation. The Typical Characteristics section shows overshoot vs. capacitive load, confirming stable behavior below 100pF and increasing overshoot beyond that threshold.
OPA2734AIDGSR 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
OPA2734AIDGSR FAQ
1.How can I place an order for OPA2734AIDGSR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2734AIDGSR 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 OPA2734AIDGSR reliable?
The price and inventory of OPA2734AIDGSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2734AIDGSR is usually 5 days.
3.What payment methods are accepted for OPA2734AIDGSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2734AIDGSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2734AIDGSR?
OPA2734AIDGSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2734AIDGSR 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 OPA2734AIDGSR?
For technical support, including OPA2734AIDGSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2734AIDGSR requirements.
6.How does Aetrix verify that OPA2734AIDGSR is sourced from the original manufacturer or authorized distributors?
All OPA2734AIDGSR 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 OPA2734AIDGSR meets industry standards.
7.What is the process for return or replacement of OPA2734AIDGSR?
All OPA2734AIDGSR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2734AIDGSR, 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 OPA2734AIDGSR part is unused and in its original packaging.
Return procedure for OPA2734AIDGSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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