OPA3681E/250 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The OPA3681E/250 is a triple current-feedback operational amplifier from Texas Instruments featuring 3 independent channels, bipolar input stage, 7500 µV maximum offset voltage, and a 16-pin SOIC package. It is optimized for high-bandwidth video and communications signal path designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- OPA3681E/250 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.6000(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Triple current-feedback amplifier topology enabling flat gain response at bandwidths exceeding 200 MHz
- Three independent channels in a single 16-pin SOIC package reducing BOM count in multi-channel video systems
- Bipolar input stage with 45 dB minimum CMRR for differential signal conditioning
- Input offset voltage max 7500 µV with frequency compensation for stable closed-loop operation
Applications
The OPA3681E/250 is designed for triple-channel video distribution amplifiers, RGB signal routing, and cable-driver stages in broadcast and consumer video equipment where all three color channels must be amplified with matched bandwidth exceeding 100 MHz. Its current-feedback architecture maintains nearly constant bandwidth independent of closed-loop gain, making it suitable for digitally controlled gain stages in cable-television amplifiers and professional audio/video matrices. The 16-pin SOIC form factor simplifies multi-channel board layout with a single footprint handling all three amplifier channels.
Specifications
| Pbfree Code | No |
| YTEOL | 0 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | CURRENT-FEEDBACK |
| Average Bias Current-Max (IIB) | 85 µA |
| Bias Current-Max (IIB) @25C | 0.04 µA |
| Common-mode Reject Ratio-Min | 45dB |
| Common-mode Reject Ratio-Nom | 52dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 7500 µV |
| JESD-30 Code | R-PDSO-G16 |
| Low-Bias | NO |
| Low-Offset | NO |
| Micropower | NO |
| Neg Supply Voltage Limit-Max | -6.5 V |
| Neg Supply Voltage-Nom (Vsup) | -5 V |
| Number of Functions | 3 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SSOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power | NO |
| Programmable Power | NO |
| Qualification Status | Not Qualified |
| Slew Rate-Min | 1200V/us |
| Slew Rate-Nom | 2100V/us |
| Supply Current-Max | 19.8mA |
| Supply Voltage Limit-Max | 6.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.635mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Unity Gain BW-Nom | 280000 |
| Wideband | YES |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| 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
Why does the OPA3681E/250 use a current-feedback architecture instead of voltage-feedback for video applications?
Current-feedback amplifiers like the OPA3681E/250 maintain nearly constant bandwidth regardless of closed-loop gain setting, unlike voltage-feedback types where gain-bandwidth product limits high-gain performance. For video cable drivers operating at gains of 2 V/V to 10 V/V, a current-feedback topology can sustain greater than 100 MHz bandwidth across that gain range. This property is essential in RGB or component video systems where all 3 channels must have matched frequency response.
What is the maximum input offset voltage of the OPA3681E/250 and does it affect video signal quality?
The OPA3681E/250 specifies a maximum input offset voltage of 7500 µV (7.5 mV). In a video amplifier with a gain of 2, this creates a DC offset up to 15 mV on the output, which is within the tolerable range for standard-definition video but may require AC coupling at the output for RGB systems requiring DC accuracy below 5 mV. For DC-coupled precision applications, a lower-offset alternative such as OPA354 or OPA842 would be more appropriate.
How does integrating 3 amplifier channels into one OPA3681E/250 package benefit RGB video amplifier board design?
Combining all 3 channels into a single 16-pin SOIC package reduces component count from 3 discrete dual op-amp packages to 1 device, saving approximately 60% of PCB area compared to using three separate 8-pin SOICs. Thermal coupling between channels is also consistent since all 3 share the same die, improving channel-to-channel gain tracking over the operating temperature range of -40°C to +85°C. Single-package sourcing also simplifies procurement and reduces placement time on SMT lines.
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About Texas Instruments
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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $4.5360 | $4.54 |
| 24+ | $3.0240 | $72.58 |
| 84+ | $2.7972 | $234.96 |
| 500+ | $1.8000 | $900.00 |
| 1000+ | $1.7000 | $1700.00 |
| 10000+ | $1.6000 | $16000.00 |
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