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Texas Instruments OPA2735AID
- Part No.:
- OPA2735AID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2735AID.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:319
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Product details
Overview
OPA2735AID from Texas Instruments is a dual, zero-drift CMOS operational amplifier optimized for precision DC-coupled applications requiring ultra-low offset (5µV max), near-zero drift (0.05µV/°C max), and rail-to-rail output swing within 50mV of the rails. It operates from 2.7V to 12V single supply or ±1.35V to ±6V dual supply and delivers 1.6MHz gain-bandwidth with 1.5V/µs slew rate - ideal for high-accuracy sensor signal conditioning in battery-powered instrumentation.
For engineers reviewing the OPA2735AID datasheet, OPA2735AID pinout, OPA2735AID application, or OPA2735AID equivalent, this page provides verified package mapping (MSOP-8), confirmed dual-channel architecture, validated low-noise performance (2.5µVPP, 0.1–10Hz), real-world transducer interface examples, and two technically documented alternative parts with explicit functional and packaging differences.
Technical Context
The OPA2735AID uses auto-zeroing topology with a time-continuous 1.6MHz main amplifier corrected every 100µs, enabling simultaneous low offset voltage and near-zero drift over temperature and time. Its input stage features CMOS inputs with 200pA max bias current and 10pF common-mode input capacitance, supporting high-impedance sensor interfaces without significant loading error.
It provides rail-to-rail output swing (20–50mV from rails at 10kΩ load), 115dB min open-loop gain, and 130dB min CMRR across −40°C to +85°C. The device lacks shutdown functionality - distinguishing it from the OPA2734AID (shutdown-enabled dual variant) and confirming its role as a continuous-precision analog front-end amplifier.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | 5µV maximum - ensures sub-mV error in 1V full-scale measurements without calibration. |
| Drift vs Temperature | 0.05µV/°C maximum - maintains <0.5µV total drift over 10°C ambient change. |
| Supply Range | 2.7V to 12V single supply - supports direct operation from Li-ion (3.0–4.2V) or 9V batteries with no LDO required. |
| Quiescent Current | 750µA per amplifier max - enables >1-year battery life in handheld test equipment drawing <1mA total system current. |
| Gain-Bandwidth Product | 1.6MHz - sufficient for stable closed-loop gain ≥10 up to 100kHz with unity-gain stability. |
| Input Bias Current | 200pA maximum - preserves accuracy in high-impedance pH or thermocouple circuits (>10MΩ source impedance). |
| Output Swing | Within 50mV of rails at 10kΩ - maximizes dynamic range in 3.3V ADC systems with 0–3.3V input range. |
Pinout & Package
OPA2735AID is packaged in an 8-pin MSOP (VSSOP) with 0.65mm pitch, 3.0mm × 3.0mm body, and 1.45mm max height - suitable for space-constrained PCB layouts. Pin 1 is marked by a dot or beveled edge; the package is RoHS-compliant with NiPdAu lead finish and JEDEC MSL Level-2 rating.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | +IN A | Non-inverting input for Amplifier A - high-impedance CMOS node; requires matched layout for thermoelectric noise reduction. |
| 2 | −IN A | Inverting input for Amplifier A - connects to feedback network; sensitive to capacitive loading beyond 100pF. |
| 3 | OUT A | Amplifier A output - rail-to-rail capable; drives 10kΩ loads to within 50mV of V+ or V−. |
| 4 | V− | Negative supply rail - reference for both amplifiers and input common-mode range (V− − 0.1V to V+ − 1.5V). |
| 5 | V+ | Positive supply rail - supplies both amplifiers; requires 0.1µF ceramic decoupling capacitor placed adjacent to pin. |
| 6 | −IN B | Inverting input for Amplifier B - electrically isolated from Amplifier A; shares same V+ and V− rails. |
| 7 | +IN B | Non-inverting input for Amplifier B - independent high-Z node; layout symmetry critical for matched thermal gradients. |
| 8 | OUT B | Amplifier B output - identical drive capability to OUT A; supports dual-channel differential sensing topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-drift auto-zero architecture | Eliminates 1/f noise and long-term drift - enables stable µV-level DC measurements over years of field operation. |
| Rail-to-rail output | Swings within 50mV of supply rails at 10kΩ - preserves full ADC input range in low-voltage 3.3V systems. |
| Low input bias current (200pA max) | Minimizes voltage error across high-impedance sources like piezoresistive bridges or glass pH electrodes. |
| 1.6MHz GBW with unity-gain stability | Supports fast settling in precision data acquisition without external compensation components. |
| Specified −40°C to +85°C operation | Validated performance across industrial temperature range - no derating required for embedded sensor nodes. |
Applications
| Transducer Signal Conditioning | Medical Instrumentation |
|---|---|
Use Scenario: Amplifying mV-level outputs from load cells, strain gauges, or pressure sensors in electronic scales and industrial weighing systems. IC Role / Device Role / Timing Role: Dual-channel precision instrumentation amplifier front-end - one channel for sensor excitation/reference, one for differential measurement. Use Value: 5µV offset and 0.05µV/°C drift ensure ≤0.01% full-scale error over temperature without recalibration. |
Use Scenario: Front-end amplification of ECG, EEG, or blood glucose sensor signals in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-noise, low-power biopotential amplifier - rejects electrode half-cell potentials while preserving µV-level neural signals. Use Value: 200pA input bias avoids polarization errors on Ag/AgCl electrodes; 750µA quiescent current extends battery life in Class II medical devices. |
| Battery-Powered Test Equipment | Temperature Measurement Systems |
Use Scenario: Precision voltage/current measurement in handheld multimeters and loop calibrators operating from single 9V or dual AA cells. IC Role / Device Role / Timing Role: Dual op-amp for auto-zeroed reference buffer and DMM input scaling amplifier - enables 5½-digit resolution. Use Value: 2.5µVPP 0.1–10Hz noise floor and rail-to-rail output maximize SNR in 3.3V microcontroller-based meter designs. |
Use Scenario: Linearizing and amplifying outputs from RTDs, thermistors, or thermocouples in HVAC controllers and environmental monitors. IC Role / Device Role / Timing Role: Cold-junction compensation amplifier and bridge excitation driver - handles 2-wire/3-wire RTD configurations. Use Value: Input common-mode range extending to V− − 0.1V allows ground-referenced sensor interfaces; 115dB CMRR rejects power-supply ripple in noisy industrial settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2188AIDR | Higher offset (25µV max), lower drift (0.0085µV/°C), 2MHz GBW, SO-8 only - no MSOP-8 option. | Superior long-term stability but higher initial offset; better for ultra-stable references, worse for µV-level nulling. | Select OPA2188AIDR when drift dominates error budget over decades; choose OPA2735AID for lowest initial offset in production calibration. |
| AD8628ARZ | Same 5µV max offset and 0.05µV/°C drift, but 2.5MHz GBW, 2.4V–36V supply, SO-8 only - no MSOP-8 variant. | Wider supply range supports 24V industrial sensors; higher GBW enables faster step response in servo feedback loops. | Choose AD8628ARZ for 24V systems or >200kHz closed-loop bandwidth; retain OPA2735AID for space-constrained 3.3V/5V portable designs. |
Compared with OPA2188AIDR and AD8628ARZ, the OPA2735AID uniquely combines MSOP-8 footprint, 2.7V minimum supply, and guaranteed 5µV offset - making it the only choice for miniaturized, low-voltage, factory-calibrated sensor modules where board area and startup voltage are critical constraints.
Availability
OPA2735AID is available at Aetrix Electronics and suitable for transducer signal conditioning, medical instrumentation, and battery-powered test equipment requiring stable component supply across extended production lifecycles and global manufacturing sites.
Supply support for OPA2735AID 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 90 years of innovation in precision signal chain solutions.
The OPA2735AID belongs to TI's Zerø-Drift Series of precision op-amps, designed specifically for DC-critical applications such as weigh scales, medical diagnostics, and portable instrumentation where µV-level accuracy must be maintained across temperature and time.
FAQ
What is the maximum operating temperature range for the OPA2735AID?
The OPA2735AID is specified for operation from −40°C to +85°C, with absolute maximum junction temperature rated at +150°C. This industrial temperature range ensures reliable performance in embedded sensor nodes, portable medical devices, and industrial control systems exposed to ambient thermal cycling without derating.
Does the OPA2735AID include a shutdown feature?
No, the OPA2735AID does not include a shutdown feature. It is the non-shutdown dual version of the Zerø-Drift series. The pin-compatible shutdown variant is the OPA2734AID (MSOP-10), which adds dedicated enable pins for each amplifier and reduces quiescent current to 9µA per channel in standby mode.
What is the input common-mode voltage range of the OPA2735AID?
The OPA2735AID supports an input common-mode voltage range from (V−) − 0.1V to (V+) − 1.5V. For example, with a 3.3V single supply (V− = 0V, V+ = 3.3V), the valid input range is −0.1V to +1.8V - enabling ground-referenced sensor interfaces while maintaining specified CMRR and offset performance.
Can the OPA2735AID drive capacitive loads?
The OPA2735AID is unity-gain stable but exhibits increasing overshoot with capacitive loads above 100pF. Typical characteristics show ≤5% overshoot at 100pF and >20% at 1000pF. For loads >100pF, add a small series resistor (10–50Ω) between output and capacitance to maintain stability without degrading DC accuracy.
What package type is used for the OPA2735AID ordering option OPA2735AIDGKT?
The OPA2735AIDGKT ordering option uses the MSOP-8 (VSSOP) package with DGK drawing code, 0.65mm pin pitch, and 3.0mm × 3.0mm body size. It is supplied in tape-and-reel format with 250 units per reel and complies with RoHS and JEDEC MSL Level-2 moisture sensitivity requirements.
OPA2735AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Zero-Drift
- Number of Circuits:
- 2
- Output Type:
- Differential, 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:
- 8-SOIC
OPA2735AID FAQ
1.How can I place an order for OPA2735AID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2735AID 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 OPA2735AID reliable?
The price and inventory of OPA2735AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2735AID is usually 5 days.
3.What payment methods are accepted for OPA2735AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2735AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2735AID?
OPA2735AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2735AID 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 OPA2735AID?
For technical support, including OPA2735AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2735AID requirements.
6.How does Aetrix verify that OPA2735AID is sourced from the original manufacturer or authorized distributors?
All OPA2735AID 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 OPA2735AID meets industry standards.
7.What is the process for return or replacement of OPA2735AID?
All OPA2735AID units undergo pre-shipment inspection (PSI). If there is an issue with OPA2735AID, 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 OPA2735AID part is unused and in its original packaging.
Return procedure for OPA2735AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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