OPA4705UAG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The OPA4705UAG4 is a quad low-cost CMOS rail-to-rail input/output operational amplifier operating from a 12V supply. It features a maximum input offset voltage of 5000 µV, 10 pA maximum bias current, and 66 dB minimum CMRR in a 14-pin SOIC package. In stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 14
- Lifecycle
- OBSOLETE
- Datasheet
- OPA4705UAG4 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 swing on a 12V supply maximizes dynamic range in single-supply signal conditioning circuits without requiring level shifting
- Extremely low input bias current maximum of 10 pA (CMOS input stage) prevents loading errors when interfacing high-impedance sensors, pH electrodes, or photodetectors
- Quad (4-channel) op-amp in a single 14-pin SOIC package reduces BOM count and PCB area in multi-channel analog front-end and active filter designs
- Voltage-feedback architecture with internal frequency compensation ensures stable closed-loop operation without requiring external compensation networks in standard gain configurations
Applications
The OPA4705UAG4 is used in multi-channel analog signal conditioning front-ends for data acquisition systems, where its rail-to-rail I/O and low bias current are critical for accurate sensor signal amplification. It is also employed in active filter banks, instrumentation amplifier stages, and audio processing circuits operating from a single 12V supply in industrial and consumer electronics. Its quad channel configuration makes it efficient for implementing four-channel buffer, integrator, or summing amplifier stages within a single package.
Specifications
| YTEOL | 0 |
| 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 | 93dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 5000 µV |
| JESD-30 Code | R-PDSO-G14 |
| 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 | 4 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP14,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power | NO |
| Programmable Power | NO |
| Qualification Status | Not Qualified |
| Slew Rate-Nom | 0.6V/us |
| Supply Current-Max | 1mA |
| Supply Voltage Limit-Max | 6.6V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Unity Gain BW-Nom | 1000 |
| Voltage Gain-Min | 100000 |
| Wideband | NO |
| Package | Small Outline Packages |
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
Compatible alternatives and drop-in replacements for OPA4705UAG4:
Frequently Asked Questions
What is the input bias current specification of the OPA4705UAG4?
The OPA4705UAG4 features a maximum input bias current of 10 pA (0.00001 µA) at 25°C, a result of its CMOS input stage, making it ideal for high-impedance sensor interfaces such as pH probes, photodiodes, and electrometer-grade measurement circuits.
What supply voltage does the OPA4705UAG4 operate from?
The OPA4705UAG4 operates from a 12V supply (typically ±6V dual or 12V single supply), providing a wide output swing with rail-to-rail capability that maximizes signal headroom in single-supply analog system designs.
What is the common-mode rejection ratio of the OPA4705UAG4?
The OPA4705UAG4 specifies a minimum CMRR of 66 dB and a nominal CMRR of 93 dB, ensuring strong rejection of common-mode noise and interference on input signal lines, which is critical in differential and instrumentation amplifier configurations.
How many op-amp channels does the OPA4705UAG4 contain?
The OPA4705UAG4 contains four independent operational amplifier channels in a single 14-pin SOIC package, allowing designers to implement four separate amplifier stages while reducing component count, PCB area, and assembly cost compared to using four discrete single op-amps.
What are typical applications for the OPA4705UAG4?
Typical applications include multi-channel sensor amplification, active low-pass and bandpass filter banks, transimpedance amplifiers for photodetector arrays, audio mixing and equalization circuits, and multi-channel data acquisition front-ends in industrial instrumentation and medical monitoring equipment.
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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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