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Texas Instruments OPA2735AIDGKR
- Part No.:
- OPA2735AIDGKR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2735AIDGKR.pdf
- Description:
- IC OPAMP ZERO-DRIFT 2CIRC 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:10,583
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Product details
Overview
OPA2735AIDGKR from Texas Instruments is a dual, zero-drift CMOS operational amplifier optimized for precision DC-coupled applications. It delivers 5µV max input 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 single supply - enabling high-accuracy signal conditioning in battery-powered medical instrumentation and electronic scales.
For engineers reviewing the OPA2735AIDGKR datasheet, OPA2735AIDGKR pinout, OPA2735AIDGKR application, or OPA2735AIDGKR equivalent, key selection criteria include its auto-zero architecture for near-zero long-term drift, low input bias current (200pA max), shutdown capability (9µA max standby), and MSOP-8 package suitability for space-constrained precision analog front-ends.
Technical Context
The OPA2735AIDGKR employs a time-continuous 1.6MHz main amplifier with proprietary auto-zero correction every 100µs, ensuring stable 5µV max offset and 0.05µV/°C max drift over −40°C to +85°C. Its CMOS input stage provides 200pA max input bias current and rail-to-rail output swing within 50mV of supply rails.
It supports single-supply operation from 2.7V to 12V (±1.35V to ±6V), features 115dB min open-loop gain, 1.6MHz gain-bandwidth product, and 1.5V/µs slew rate. Input common-mode range extends from (V−) − 0.1V to (V+) − 1.5V, and it includes internal ESD protection rated at 2000V HBM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 5µV max - enables µV-level DC accuracy without manual trimming in strain gauge or thermocouple amplifiers. |
| Offset Drift | 0.05µV/°C max - ensures <1µV total drift over full industrial temperature range, critical for unattended temperature measurement systems. |
| Quiescent Current | 750µA max per amplifier - allows dual-channel precision amplification in 10-year battery-powered handheld test equipment. |
| Supply Range | 2.7V to 12V single supply - supports direct interface with Li-ion, 3.3V, and 5V systems without level-shifting circuitry. |
| Input Bias Current | 200pA max - preserves signal integrity in high-impedance sensor interfaces like pH electrodes or piezoresistive transducers. |
| Gain-Bandwidth Product | 1.6MHz - sufficient for 10kHz bandwidth in G=100 bridge amplifier configurations with <0.01% gain error. |
| Output Swing | Within 50mV of rails - maximizes dynamic range in 3.3V ADC driver stages, delivering >3.2Vpp output swing. |
Pinout & Package
The OPA2735AIDGKR is housed in an 8-pin VSSOP (DGK) package measuring 3.0mm × 3.0mm × 1.0mm, with exposed thermal pad for enhanced power dissipation in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Delivers rail-to-rail output swing; must be decoupled with 0.1µF capacitor to ground if driving capacitive loads >100pF. |
| 2 (−IN A) | Inverting input A | High-impedance node; requires matched trace impedance and guard ring to minimize thermoelectric offset errors. |
| 3 (+IN A) | Non-inverting input A | Accepts common-mode voltages from (V−) − 0.1V to (V+) − 1.5V; sensitive to EMI without local 1nF bypass. |
| 4 (V−) | Negative supply rail | Reference for enable logic and input common-mode range; must be connected directly to ground or negative rail with low-inductance path. |
| 5 (+IN B) | Non-inverting input B | Independent channel input; shares same CMRR (115dB min) and PSRR (110dB min) as Channel A. |
| 6 (−IN B) | Inverting input B | Electrically isolated from Channel A; enables dual-sensor differential acquisition without crosstalk. |
| 7 (OUT B) | Amplifier B output | High-impedance state during shutdown; compatible with multiplexed analog buses in multi-channel data loggers. |
| 8 (V+) | Positive supply rail | Accepts 2.7V–12V; requires 0.1µF ceramic capacitor placed ≤2mm from pin to suppress supply noise coupling into offset performance. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-zero architecture | Continuous 100µs correction cycles eliminate 1/f noise and ensure <5µV offset stability over 10,000 hours of operation. |
| Rail-to-rail output | Swings within 50mV of V+ and V−, preserving >97% of full-scale range when driving 12-bit SAR ADCs from 3.3V supplies. |
| Shutdown mode | Reduces per-amplifier current to 9µA max and places outputs in high-Z state, enabling power-gated sensor signal chains in IoT nodes. |
| Low input capacitance | 2pF differential / 10pF common-mode - minimizes phase shift in unity-gain stable transimpedance configurations up to 1MHz. |
| ESD robustness | 2000V HBM rating - withstands handling in Class 1B ESD environments without external protection diodes. |
Applications
| Transducer Signal Conditioning | Medical Instrumentation |
|---|---|
Use Scenario: Amplifying mV-level outputs from load cells and pressure sensors in electronic scales and industrial weighing systems. IC Role / Device Role / Timing Role: Dual-channel precision instrumentation amplifier front-end with matched gain paths and sub-µV drift. Use Value: Enables 24-bit effective resolution by holding offset drift below 0.1 LSB over temperature in 5kg–100kg scale designs. | Use Scenario: Front-end amplification of ECG, EEG, and blood glucose sensor signals in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-noise, low-drift dual op-amp for biopotential acquisition with DC-coupled baseline stability. Use Value: Maintains <1µV baseline wander over 8-hour monitoring sessions, eliminating need for AC-coupling and associated phase distortion. |
| Battery-Powered Test Equipment | Temperature Measurement Systems |
Use Scenario: Precision voltage reference buffering and sensor excitation in handheld multimeters and calibrators. IC Role / Device Role / Timing Role: Dual op-amp providing rail-to-rail output drive for DAC buffers and low-drift reference followers. Use Value: Extends battery life to >12 months on two AA cells while maintaining 0.005% reference accuracy across operating temperature. | Use Scenario: Cold-junction compensation and linearization of thermocouple outputs in industrial process controllers. IC Role / Device Role / Timing Role: Dual amplifier implementing precision difference amplifier and reference buffer in thermopile-based surface temperature sensors. Use Value: Achieves ±0.1°C absolute accuracy from −40°C to +125°C by rejecting thermoelectric EMF errors via matched input traces. |
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 0.003µV/°C typical drift but wider 4.5–36V supply range; no shutdown function. | Preferred for high-voltage industrial sensors where shutdown is unnecessary and extended supply range is required. | Select OPA2188AIDR when operating above 12V or requiring ultra-low typical drift over narrow temperature spans. |
| AD8629ARZ | Similar 1µV max offset and 0.01µV/°C drift, but higher 1.2mA quiescent current and SOIC-8 only packaging. | Better suited for legacy SOIC footprints where board rework is prohibited and power budget allows +60% IQ. | Choose AD8629ARZ when replacing existing SOIC-8 designs and thermal performance outweighs quiescent current concerns. |
Compared with OPA2188AIDR and AD8629ARZ, the OPA2735AIDGKR offers the lowest quiescent current (750µA) in a space-saving MSOP-8 package with integrated shutdown - making it optimal for dual-channel, battery-constrained, low-drift applications where supply voltage stays below 12V.
Availability
OPA2735AIDGKR is available at Aetrix Electronics and suitable for electronic scales, medical instrumentation, battery-powered test equipment, and temperature measurement systems requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for OPA2735AIDGKR 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 specializing in analog and embedded processing technologies, with leadership in precision analog signal chain solutions.
The OPA2735AIDGKR belongs to TI's Zerø-Drift Series of CMOS operational amplifiers, designed specifically for high-accuracy, low-power, DC-critical applications including sensor signal conditioning, medical diagnostics, and portable instrumentation.
FAQ
What is the maximum operating temperature range for the OPA2735AIDGKR?
The OPA2735AIDGKR is specified for operation from −40°C to +85°C, with an absolute maximum junction temperature of +150°C. This industrial temperature range ensures reliable performance in medical devices, handheld test gear, and factory-floor instrumentation without derating under normal ambient conditions. The device's zero-drift architecture maintains specification compliance across this full range, unlike conventional op-amps that degrade significantly above +70°C.
Does the OPA2735AIDGKR include a shutdown feature?
No, the OPA2735AIDGKR is the non-shutdown version of the dual OPA273x family. Shutdown functionality is only present in the OPA2734 variants (e.g., OPA2734AIDGSR). The OPA2735AIDGKR draws 750µA max per amplifier continuously and lacks an enable pin - confirmed by its MSOP-8 pinout (no dedicated EN pin) and absence of shutdown timing parameters in its electrical characteristics table.
What package type is used for the OPA2735AIDGKR?
The OPA2735AIDGKR uses the VSSOP-8 (DGK) package: a 3.0mm × 3.0mm, 0.65mm pitch, 8-pin surface-mount package with exposed thermal pad. This micro-size footprint reduces PCB area by ~50% versus SOIC-8 while maintaining compatibility with standard reflow profiles and offering improved thermal resistance (150°C/W θJA).
Can the OPA2735AIDGKR operate from a single 3.3V supply?
Yes, the OPA2735AIDGKR fully supports single-supply operation from 2.7V to 12V, including 3.3V. At 3.3V, its input common-mode range extends from −0.1V to +1.8V, and output swings within 50mV of both rails - delivering >3.2Vpp dynamic range. This makes it ideal for interfacing with 3.3V microcontrollers and 12-bit ADCs without level-shifting circuitry.
What is the typical input bias current of the OPA2735AIDGKR at room temperature?
The typical input bias current of the OPA2735AIDGKR at +25°C is ±100pA, with a maximum of ±200pA over the full −40°C to +85°C temperature range. This ultra-low bias current enables accurate amplification of signals from high-impedance sources such as pH electrodes, photodiode transimpedance circuits, and piezoresistive sensors without significant DC error.
OPA2735AIDGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-VSSOP
OPA2735AIDGKR FAQ
1.How can I place an order for OPA2735AIDGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2735AIDGKR 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 OPA2735AIDGKR reliable?
The price and inventory of OPA2735AIDGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2735AIDGKR is usually 5 days.
3.What payment methods are accepted for OPA2735AIDGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2735AIDGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2735AIDGKR?
OPA2735AIDGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2735AIDGKR 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 OPA2735AIDGKR?
For technical support, including OPA2735AIDGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2735AIDGKR requirements.
6.How does Aetrix verify that OPA2735AIDGKR is sourced from the original manufacturer or authorized distributors?
All OPA2735AIDGKR 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 OPA2735AIDGKR meets industry standards.
7.What is the process for return or replacement of OPA2735AIDGKR?
All OPA2735AIDGKR units undergo pre-shipment inspection (PSI). If there is an issue with OPA2735AIDGKR, 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 OPA2735AIDGKR part is unused and in its original packaging.
Return procedure for OPA2735AIDGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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