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Texas Instruments OPA734AID
- Part No.:
- OPA734AID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA734AID.pdf
- Description:
- IC OPAMP ZERO-DRIFT 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,258
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Product details
Overview
OPA734AID from Texas Instruments is a zero-drift, rail-to-rail output CMOS operational amplifier with 5µV max input offset voltage, 0.05µV/°C max drift, and shutdown capability. It operates from 2.7V to 12V single supply (±1.35V to ±6V), delivers rail-to-rail output swing within 50mV of rails, and draws only 750µA quiescent current - ideal for precision transducer signal conditioning in battery-powered instrumentation.
For engineers reviewing the OPA734AID datasheet, OPA734AID pinout, OPA734AID application, or OPA734AID equivalent, this page provides verified package mapping (SOIC-8), confirmed shutdown timing (tON = 150µs, tOFF = 1.5µs), real-world noise performance (2.5µVPP, 0.1Hz–10Hz), and validated alternatives for low-drift, low-power precision amplification.
Technical Context
The OPA734AID 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 CMOS input stage delivers 200pA max bias current and >115dB CMRR over −40°C to +85°C.
It features logic-controlled shutdown referenced to V−, with valid HIGH > (V−) + 2V and LOW < (V−) + 0.8V, placing output in high-impedance state and reducing quiescent current to 9µA max. Input common-mode range extends from (V−) − 0.1V to (V+) − 1.5V, supporting wide-supply operation while maintaining precision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 5µV (max) - enables sub-10µV system-level DC accuracy without trimming in strain gauge or thermocouple interfaces. |
| Offset Drift | 0.05µV/°C (max) - ensures <0.5µV total drift over 10°C ambient change, critical for medical temperature measurement stability. |
| Quiescent Current | 750µA (max) - supports continuous operation in handheld test equipment with multi-year battery life at 3V supply. |
| Supply Range | 2.7V to 12V (single) or ±1.35V to ±6V (dual) - accommodates both low-voltage portable systems and industrial 12V rails without level-shifting. |
| Output Swing | Rail-to-rail within 50mV - preserves full dynamic range when driving SAR ADCs like ADS8342 with 0.1V–4.9V input range. |
| Gain-Bandwidth | 1.6MHz - sufficient for closed-loop gain ≥10 in bridge amplifier circuits (e.g., Figure 2) with <0.1% settling error. |
| Shutdown Current | 9µA (max) per amplifier - reduces average power by >98% in duty-cycled sensor front-ends such as electronic scales. |
Pinout & Package
OPA734AID is packaged in SOIC-8 (Package Drawing D, 3.9mm × 4.9mm, 1.75mm max height) with industry-standard pinout and RoHS-compliant NiPdAu lead finish (Level-2 MSL rating).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Enable (EN) | CMOS-compatible digital input; HIGH (>V− + 2V) enables amplifier, LOW ( |
| 2 | Inverting Input (−IN) | Differential input node; 200pA max bias current enables high-impedance sensor interfacing (e.g., thermopiles, pH electrodes). |
| 3 | Non-Inverting Input (+IN) | Differential input node; matched to −IN for optimal CMRR and thermoelectric error cancellation in precision layouts. |
| 4 | V− | Negative supply rail; all logic thresholds and input common-mode range referenced to this pin. |
| 5 | Output (OUT) | Rail-to-rail output capable of sourcing/sinking ±20mA; settles to final VOS after one 100µs auto-zero cycle post-enable. |
| 6 | NC | No connection - internally unconnected; must be left floating or tied to ground per layout best practices. |
| 7 | NC | No connection - internally unconnected; no electrical function; avoid routing signals nearby to prevent coupling. |
| 8 | V+ | Positive supply rail; supports up to +13.2V absolute max; requires 0.1µF ceramic capacitor placed adjacent to pin per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-zeroing architecture | Continuous 1.6MHz signal-path amplifier corrected every 100µs - eliminates manual calibration and maintains 5µV offset across lifetime and temperature. |
| Rail-to-rail output | Swings within 50mV of V+ and V− at 10kΩ load - maximizes usable ADC input range without external level-shifting circuitry. |
| Low input bias current | 200pA (max) at +25°C - minimizes voltage error across high-value feedback networks (e.g., 1MΩ+ in thermopile amplifiers). |
| Shutdown mode | 150µs enable time (includes one full auto-zero cycle) and 1.5µs disable time - enables precise gating in multiplexed sensor arrays. |
| Wide supply flexibility | Operates from 2.7V to 12V single supply or ±1.35V to ±6V dual supply - simplifies power architecture in mixed-signal industrial modules. |
Applications
| Transducer Signal Conditioning | Medical Temperature Monitoring |
|---|---|
|
Use Scenario: Amplifying mV-level outputs from load cells, pressure sensors, or RTDs in portable electronic scales. IC Role / Device Role / Timing Role: Primary precision gain stage with programmable gain (G = 1 to 50) and integrated shutdown for power cycling. Use Value: 5µV offset and 0.05µV/°C drift ensure ≤0.01% full-scale error over operating temperature, eliminating recalibration in field-deployed devices. |
Use Scenario: Front-end amplification for thermistor or thermopile-based non-contact temperature sensors in clinical thermometers. IC Role / Device Role / Timing Role: Low-noise, low-drift buffer and filter driver preceding 16-bit delta-sigma ADCs (e.g., ADS1100). Use Value: 2.5µVPP (0.1Hz–10Hz) noise and rail-to-rail output preserve microvolt-level thermal EMF resolution at body-temperature differentials. |
| Battery-Powered Test Equipment | Handheld Precision Data Loggers |
|
Use Scenario: Input stage in handheld multimeters or oscilloscope probes requiring stable DC accuracy and low power. IC Role / Device Role / Timing Role: Zero-drift amplifier in autoranging input circuitry with automatic gain switching and sleep-mode control. Use Value: 750µA quiescent current and 9µA shutdown current extend AA/AAA battery life to >12 months in intermittent-use instruments. |
Use Scenario: Analog front-end for environmental sensors (humidity, gas, CO₂) in long-duration field loggers powered by coin cells. IC Role / Device Role / Timing Role: Sensor interface amplifier with timed wake-up via EN pin, synchronized to ADC sampling intervals. Use Value: Shutdown output high-impedance state prevents loading of shared analog bus during sleep, enabling multi-channel multiplexing without crosstalk. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA735AID | No shutdown pin; SOT23-5 or SOIC-8 packaging; identical offset (5µV max), drift (0.05µV/°C), and supply range. | Lacks enable functionality - unsuitable for power-gated systems but offers smaller footprint in SOT23-5 for space-constrained designs. | Select OPA735AID when shutdown is unnecessary and board area is critical; verify layout compatibility with 5-pin vs 8-pin SOIC footprints. |
| AD8628ARZ | Analog Devices zero-drift op amp; 1µV max offset, 0.002µV/°C drift, 1.5MHz GBW, but higher 1.2mA IQ and no shutdown mode. | Superior DC precision but consumes 60% more quiescent current; requires external enable circuitry for power gating. | Choose AD8628ARZ only when sub-2µV offset is mandatory and power budget allows; OPA734AID provides better IQ/precision trade-off for portable use. |
Compared with OPA735AID and AD8628ARZ, the OPA734AID uniquely balances ultra-low drift, integrated shutdown, and 750µA quiescent current in an industry-standard SOIC-8 package - making it optimal for battery-operated instrumentation requiring both precision and power-aware operation.
Availability
OPA734AID is available at Aetrix Electronics and suitable for transducer signal conditioning, medical temperature monitoring, and battery-powered test equipment requiring stable component supply across extended production lifecycles.
Supply support for OPA734AID 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 signal chain solutions.
The OPA734AID belongs to TI's Zerø-Drift Series of CMOS op amps, designed specifically for high-accuracy, low-power applications where long-term DC stability and minimal thermal drift are critical - including portable instrumentation and industrial sensing.
FAQ
What is the maximum supply voltage for the OPA734AID?
The OPA734AID has an absolute maximum supply voltage of +13.2V. Operation beyond this rating risks permanent damage. For reliable long-term performance, it is specified over a recommended range of +2.7V to +12V (single supply) or ±1.35V to ±6V (dual supply), with electrical characteristics guaranteed from −40°C to +85°C.
Does the OPA734AID require external components for stable operation?
Yes - a 0.1µF ceramic capacitor must be placed as close as possible across the V+ and V− pins to ensure stability and minimize supply noise coupling. This is explicitly required in TI's layout guidelines. Additional filtering (e.g., 1nF capacitors near inputs) may be needed for high-impedance sources to suppress clock feedthrough from the auto-zeroing circuit.
How does the enable pin on the OPA734AID function in split-supply configurations?
In split-supply operation, the OPA734AID's Enable pin is referenced to V−, not ground. A valid logic HIGH is > (V−) + 2V (e.g., −4.5V + 2V = −2.5V when using ±4.5V supplies), and a valid LOW is < (V−) + 0.8V. The internal pull-up ensures default-enable behavior if left open, but external logic must be level-shifted relative to V− to avoid invalid states.
What is the impact of the auto-zeroing architecture on OPA734AID's small-signal response?
The OPA734AID's auto-zeroing introduces no phase reversal and maintains unity-gain stability, but its 1.6MHz GBW and 1.5V/µs slew rate limit large-signal bandwidth. Small-signal step response shows clean settling with <1% overshoot up to 100kHz; clock feedthrough is minimized (<10nV) when source impedances are matched and <1kΩ, as verified in typical characteristics.
Can the OPA734AID drive capacitive loads directly?
The OPA734AID can drive moderate capacitive loads, but stability degrades above ~100pF without isolation. Typical characteristics show increasing overshoot with capacitance - at 1000pF, overshoot exceeds 20%. For loads >100pF, TI recommends adding a series resistor (e.g., 10–100Ω) between output and capacitance, or using a dedicated buffer stage to maintain phase margin and prevent oscillation.
OPA734AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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:
- 8-SOIC
OPA734AID FAQ
1.How can I place an order for OPA734AID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA734AID 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 OPA734AID reliable?
The price and inventory of OPA734AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA734AID is usually 5 days.
3.What payment methods are accepted for OPA734AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA734AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA734AID?
OPA734AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA734AID 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 OPA734AID?
For technical support, including OPA734AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA734AID requirements.
6.How does Aetrix verify that OPA734AID is sourced from the original manufacturer or authorized distributors?
All OPA734AID 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 OPA734AID meets industry standards.
7.What is the process for return or replacement of OPA734AID?
All OPA734AID units undergo pre-shipment inspection (PSI). If there is an issue with OPA734AID, 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 OPA734AID part is unused and in its original packaging.
Return procedure for OPA734AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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