Overview
The THS3111, produced by Texas Instruments, is a low-noise, high-voltage, current-feedback operational amplifier. This amplifier is designed to operate over a wide supply range of ±5 V to ±15 V, making it suitable for high-performance applications. It features high output current drive, a high slew rate, and wide bandwidth, which are essential for applications requiring high output voltage swings at high frequencies.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Unit |
|---|---|---|---|---|
| Supply Voltage Range | ±5 V to ±15 V | ±4.5 V to ±16 V | ±16 V | V |
| Quiescent Current | 4.8 mA | 2.5 mA | 7.5 mA | mA |
| Output Voltage Swing (RL = 100 Ω) | ±13.4 V | ±12.5 V | ±12 V | V |
| Output Current (Sourcing/Sinking, RL = 25 Ω) | 260 mA | 175 mA | 260 mA | mA |
| Slew Rate | 1300 V/μs | - | - | V/μs |
| Bandwidth (G = 2, RL = 100 Ω) | 90 MHz | - | - | MHz |
| Noninverting Current Noise | 2 pA/√Hz | - | - | pA/√Hz |
| Voltage Noise | 3 nV/√Hz | - | - | nV/√Hz |
Key Features
- Low noise: 2 pA/√Hz noninverting current noise and 3 nV/√Hz voltage noise.
- High output current drive: Up to 260 mA.
- High slew rate: 1300 V/μs.
- Wide bandwidth: Up to 90 MHz at a gain of 2.
- Wide supply range: ±5 V to ±15 V.
- Power-down feature (THS3110 only): Reduces quiescent current to 270 μA.
- High output voltage swing: Suitable for high-frequency applications.
Applications
- Video distribution: Ideal for video signal processing and distribution.
- Power FET driver: Suitable for driving power FETs due to its high output current capability.
- Pin driver: Can be used to drive high-capacitive loads.
- Capacitive load driver: Effective in driving capacitive loads without oscillation.
Q & A
- What is the supply voltage range of the THS3111?
The THS3111 operates over a supply voltage range of ±5 V to ±15 V.
- What is the typical quiescent current of the THS3111?
The typical quiescent current is 4.8 mA.
- What is the slew rate of the THS3111?
The slew rate is 1300 V/μs.
- What is the bandwidth of the THS3111 at a gain of 2?
The bandwidth is up to 90 MHz at a gain of 2.
- Does the THS3111 have a power-down feature?
No, the power-down feature is available only in the THS3110 model.
- What are the typical output current capabilities of the THS3111?
The THS3111 can source or sink up to 260 mA of output current.
- What is the noise performance of the THS3111?
The THS3111 has a noninverting current noise of 2 pA/√Hz and a voltage noise of 3 nV/√Hz.
- What are some common applications of the THS3111?
Common applications include video distribution, power FET driving, pin driving, and capacitive load driving.
- What is the output voltage swing of the THS3111?
The output voltage swing is up to ±13.4 V for a load resistance of 100 Ω.
- How does the THS3111 handle capacitive loads?
The THS3111 is effective in driving capacitive loads without oscillation due to its high output current drive and stability.
