Overview
The THS3121IDRG4, produced by Texas Instruments, is a high-performance, low-noise, high-voltage current-feedback amplifier. This device is part of the THS3120 and THS3121 family, designed to offer well-regulated AC performance and high output current drive. The THS3121IDRG4 is particularly suited for applications requiring high bandwidth, low noise, and the ability to drive high capacitive loads.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Small-signal bandwidth (G = 2, RL = 50 Ω) | 120 MHz | MHz |
| Slew Rate (RL = 50 Ω, VO = 8 VPP) | 1700 V/μs | V/μs |
| Supply Voltage Range | ±5 V to ±15 V | V |
| Operating Free-Air Temperature | –40°C to +85°C | °C |
| Output Voltage Swing (RL = 50 Ω) | ±12 V | V |
| Output Current (sourcing, RL = 25 Ω) | 475 mA | mA |
| Output Current (sinking, RL = 25 Ω) | 490 mA | mA |
| Quiescent Current | 7 mA to 11 mA | mA |
| Input Common-Mode Voltage Range | ±12.7 V | V |
| Common-Mode Rejection Ratio | 70 dB | dB |
Key Features
- High bandwidth: Up to 120 MHz at a gain of 2.
- Low noise: Noninverting current noise of 1 pA/√Hz.
- High slew rate: 1700 V/μs.
- Wide supply range: ±5 V to ±15 V.
- High output current drive: Capable of sourcing and sinking up to 490 mA.
- Power-down feature (THS3120 only): Reduces quiescent current significantly when not in use.
- Compact packaging: Available in SOIC-8 and MSOP-8 PowerPAD™ packages.
Applications
- Video Distribution: Ideal for high-frequency video signal distribution due to its high bandwidth and low distortion.
- Power FET Driver: Suitable for driving power FETs with high current and voltage requirements.
- Pin Driver: Can drive high-capacitive loads, making it suitable for pin drivers in various applications.
- Capacitive Load Driver: Designed to handle high capacitive loads efficiently.
Q & A
- What is the typical small-signal bandwidth of the THS3121IDRG4 at a gain of 2?
The typical small-signal bandwidth is 120 MHz at a gain of 2 and RL = 50 Ω. - What is the slew rate of the THS3121IDRG4?
The slew rate is 1700 V/μs. - What is the operating supply voltage range for the THS3121IDRG4?
The operating supply voltage range is ±5 V to ±15 V. - What is the maximum output current the THS3121IDRG4 can source or sink?
The device can source up to 475 mA and sink up to 490 mA at RL = 25 Ω. - Does the THS3121IDRG4 have a power-down feature?
No, the power-down feature is available only on the THS3120 model. - What are the typical package options for the THS3121IDRG4?
The device is available in SOIC-8 and MSOP-8 PowerPAD™ packages. - What is the common-mode rejection ratio (CMRR) of the THS3121IDRG4?
The CMRR is typically 70 dB. - What are some common applications for the THS3121IDRG4?
Common applications include video distribution, power FET drivers, pin drivers, and capacitive load drivers. - What is the maximum junction temperature for the THS3121IDRG4?
The maximum junction temperature is +125°C for continuous operation. - How much quiescent current does the THS3121IDRG4 typically consume?
The quiescent current ranges from 7 mA to 11 mA.
