OPA705NA/3K Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
The OPA705NA/3K is a low-cost CMOS rail-to-rail input/output operational amplifier from Texas Instruments. It operates on a 12V supply with 66dB minimum CMRR, 0.01pA typical bias current, and voltage-feedback architecture with frequency compensation. Packaged in a compact 5-pin SOT-23, available in 3000-unit tape-and-reel with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- OPA705NA/3K Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Rail-to-rail input and output swings on 12V supply maximize dynamic range in single-supply signal conditioning designs
- Ultra-low 0.01pA bias current (CMOS input stage) ideal for high-impedance sensor interfaces with minimal loading
- Voltage-feedback architecture with internal frequency compensation simplifies gain-bandwidth optimization in precision amplifier circuits
Applications
The OPA705NA/3K is suited for precision signal conditioning in battery-powered and single-supply systems, including sensor amplifiers, active filters, and data acquisition front-ends where rail-to-rail I/O maximizes the usable signal range. Its ultra-low 0.01pA bias current makes it ideal for interfacing with high-impedance sources such as pH electrodes, photodetectors, and piezoelectric sensors. The compact SOT-23 package and low cost also make it popular in portable medical instruments, industrial sensors, and consumer electronics.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Average Bias Current-Max (IIB) | 0.00001 µA |
| Bias Current-Max (IIB) @25C | 0.00001 µA |
| Common-mode Reject Ratio-Min | 66dB |
| Common-mode Reject Ratio-Nom | 77dB |
| Frequency Compensation | YES |
| Input Offset Current-Max (IIO) | 0.00001 µA |
| Input Offset Voltage-Max | 5000 µV |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e4 |
| Low-Bias | YES |
| Low-Offset | NO |
| Micropower | YES |
| Neg Supply Voltage Limit-Max | -6.6 V |
| Neg Supply Voltage-Nom (Vsup) | -5 V |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power | NO |
| Programmable Power | NO |
| Qualification Status | Not Qualified |
| Slew Rate-Nom | 0.6V/us |
| Supply Current-Max | 0.25mA |
| Supply Voltage Limit-Max | 6.6V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Unity Gain BW-Nom | 1000 |
| Voltage Gain-Min | 100000 |
| Wideband | NO |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the supply voltage range for the OPA705NA/3K?
The OPA705NA/3K is designed to operate on a 12V supply voltage. Its rail-to-rail input and output capability ensures the signal can swing from supply to ground, making it ideal for single-supply applications in sensor conditioning and data acquisition systems.
What is the input bias current of the OPA705NA/3K?
The OPA705NA/3K features an extremely low maximum input bias current (IIB) of 0.01pA (0.00001µA) at 25°C, attributed to its CMOS input architecture. This makes it ideal for high-impedance sensor interfaces such as pH meters, charge amplifiers, and piezoelectric transducer circuits.
What package does the OPA705NA/3K come in?
The OPA705NA/3K is packaged in a 5-pin SOT-23, a small surface-mount package well-suited for space-constrained PCB layouts in portable instruments and consumer electronics. The /3K suffix indicates it is supplied on a 3000-unit tape-and-reel for automated assembly.
What is the CMRR specification for the OPA705NA/3K?
The OPA705NA/3K specifies a minimum common-mode rejection ratio (CMRR) of 66dB, with a nominal value of 77dB. This ensures effective rejection of common-mode noise and interference in differential and single-ended measurement applications.
Is the OPA705NA/3K suitable for battery-powered designs?
Yes, the OPA705NA/3K is well-suited for battery-powered designs due to its CMOS architecture, rail-to-rail I/O, and low supply current. Its single-supply 12V operation and compact SOT-23 package make it an efficient choice for portable medical devices, field sensors, and handheld instruments.
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Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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