THS3111DGN Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
THS3111DGN is a single-channel, low-noise, high-voltage current-feedback operational amplifier with 60 dB minimum CMRR and 8 µA bias current, rated from -40°C to 85°C in an 8-pin MSOP PowerPAD package. In stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- THS3111DGN Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of THS3111DGN?
- Current-feedback architecture enables gain-bandwidth independence for flat frequency response across multiple closed-loop gain settings
- Low input bias current of 8 µA at 25°C with 60 dB minimum CMRR for precision high-frequency signal conditioning
- PowerPAD MSOP-8 package with integrated thermal pad reduces junction-to-board thermal resistance for reliable operation at -40°C to 85°C
- Frequency compensation included internally, simplifying PCB design for high-speed amplifier stages without external compensation networks
What is THS3111DGN used for?
The THS3111DGN is designed for high-speed signal conditioning in communications line drivers, video distribution amplifiers, and active filter stages where a current-feedback topology is needed for stable gain across wide bandwidths. Its low input bias current of 8 µA and 68 dB typical CMRR make it suitable for single-ended to differential conversion in ADC driver circuits operating across the industrial temperature range of -40°C to 85°C. The compact MSOP PowerPAD footprint suits space-constrained instrumentation and test equipment designs that require efficient thermal management.
What are the specifications of THS3111DGN?
| Pbfree Code | No |
| YTEOL | 0 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | CURRENT-FEEDBACK |
| Average Bias Current-Max (IIB) | 10 µA |
| Bias Current-Max (IIB) @25C | 8 µA |
| Common-mode Reject Ratio-Min | 60dB |
| Common-mode Reject Ratio-Nom | 68dB |
| Frequency Compensation | YES |
| Input Offset Voltage-Max | 12000 µV |
| JESD-30 Code | S-PDSO-G8 |
| Low-Bias | NO |
| Low-Offset | NO |
| Micropower | NO |
| Neg Supply Voltage-Nom (Vsup) | -5 V |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH |
| Power | NO |
| Programmable Power | NO |
| Qualification Status | Not Qualified |
| Slew Rate-Nom | 1300V/us |
| Supply Current-Max | 7.5mA |
| Supply Voltage Limit-Max | 33V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Unity Gain BW-Nom | 100000 |
| Wideband | YES |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
Where can I find the THS3111DGN datasheet?
THS3111DGN Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for THS3111DGN?
Compatible alternatives and drop-in replacements for THS3111DGN:
Frequently Asked Questions
What is the input bias current of the THS3111DGN and how does it affect precision circuit design?
The THS3111DGN has a maximum input bias current (IIB) of 8 µA at 25°C, rising to a maximum of 10 µA over the full -40°C to 85°C range. In precision applications, this bias current flowing through source impedances creates an offset voltage; for a 1 kΩ source resistance, it introduces up to 10 mV of error, so designers should minimize feedback resistor values or use a bias-current compensation resistor to maintain accuracy.
How does the current-feedback architecture of the THS3111DGN benefit wideband amplifier designs compared to a voltage-feedback op-amp?
Current-feedback amplifiers like the THS3111DGN maintain nearly constant bandwidth independent of closed-loop gain — unlike voltage-feedback op-amps where bandwidth decreases at higher gains following the gain-bandwidth product rule. This means a designer can set a gain of 10 V/V while retaining a wide -3 dB bandwidth, enabling high-speed signal chains in video and communications applications without sacrificing frequency response.
What is the operating temperature range of the THS3111DGN and is it suitable for industrial environments?
The THS3111DGN is specified across the extended industrial temperature range of -40°C to 85°C, making it fully suitable for industrial control systems, outdoor sensor interfaces, and automotive-adjacent designs where ambient temperatures fluctuate. The MSOP PowerPAD package assists thermal management by conducting heat directly to the PCB ground plane, maintaining junction temperatures within safe limits at elevated ambient conditions.
What common-mode rejection ratio does the THS3111DGN guarantee and when is this relevant?
The THS3111DGN guarantees a minimum CMRR of 60 dB, with a typical value of 68 dB. This level of rejection is important in differential signal acquisition paths — for instance, in industrial sensor front-ends or ADC driver circuits where the common-mode noise on supply or signal lines can reach several hundred millivolts. A 60 dB CMRR means common-mode signals are attenuated by a factor of 1000 before appearing at the differential output.
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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.
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