Overview
The THS3121 is a low-noise, high-voltage, high output current drive, current-feedback amplifier designed by Texas Instruments. This amplifier is optimized for high-performance applications and operates over a wide supply range of ±5 V to ±15 V. It is known for its well-regulated AC performance characteristics, including a high unity-gain bandwidth of 130 MHz and a slew rate of 1700 V/µs. The THS3121 is available in SOIC-8 (D) and MSOP-8 (DGN) PowerPAD packages, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | ±5 V to ±15 V | V |
| Unity-Gain Bandwidth | 130 MHz | MHz |
| Slew Rate | 1700 V/µs | V/µs |
| Noninverting Current Noise | 1 pA/√Hz | pA/√Hz |
| Inverting Current Noise | 10 pA/√Hz | pA/√Hz |
| Voltage Noise | 2.5 nV/√Hz | nV/√Hz |
| Output Current Drive | 475 mA | mA |
| Operating Temperature Range | –40°C to +85°C | °C |
| Package Type | SOIC-8 (D), MSOP-8 (DGN) |
Key Features
- Low Noise: 1 pA/√Hz Noninverting Current Noise, 10 pA/√Hz Inverting Current Noise, and 2.5 nV/√Hz Voltage Noise.
- High Output Current Drive: Up to 475 mA.
- High Slew Rate: 1700 V/µs.
- Wide Bandwidth: 120 MHz at a gain of 2.
- Wide Supply Range: ±5 V to ±15 V.
- High AC Performance: 0.1-dB flat bandwidth beyond 90 MHz.
Applications
- Video Distribution.
- Power FET Driver.
- Pin Driver.
- Capacitive Load Driver.
Q & A
- What is the supply voltage range of the THS3121? The supply voltage range is ±5 V to ±15 V.
- What is the unity-gain bandwidth of the THS3121? The unity-gain bandwidth is 130 MHz.
- What is the slew rate of the THS3121? The slew rate is 1700 V/µs.
- What are the noise specifications of the THS3121? The noninverting current noise is 1 pA/√Hz, the inverting current noise is 10 pA/√Hz, and the voltage noise is 2.5 nV/√Hz.
- What is the maximum output current drive of the THS3121? The maximum output current drive is 475 mA.
- What are the typical applications of the THS3121? Typical applications include video distribution, power FET driver, pin driver, and capacitive load driver.
- In what packages is the THS3121 available? The THS3121 is available in SOIC-8 (D) and MSOP-8 (DGN) PowerPAD packages.
- What is the operating temperature range of the THS3121? The operating temperature range is –40°C to +85°C.
- Does the THS3121 have a power-down feature? No, the THS3121 does not have a power-down feature; this feature is available only in the THS3120 model.
- What is the bandwidth of the THS3121 at a gain of 2? The bandwidth at a gain of 2 is 120 MHz.
