Overview
The THS3491IDDAT is a high-performance current feedback amplifier (CFA) produced by Texas Instruments. Designed for applications requiring low distortion and high output power, this component excels in scenarios demanding frequencies above 100MHz. It is particularly suited for users in industries such as telecommunications, test and measurement, and professional audio equipment. The THS3491IDDAT stands out for its exceptional bandwidth, high slew rate, and robust output current capabilities, making it a competitive choice for high-speed signal processing.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Bandwidth | 900MHz (VO = 2VPP, AV = 5V/V) | MHz | Small signal |
| Bandwidth | 320MHz (VO = 10VPP, AV = 5V/V) | MHz | Large signal |
| Slew Rate | 8000 | V/µs | VO = 20VPP |
| Input Voltage Noise | 1.7 | nV/√Hz | Typical |
| Supply Voltage Range (Dual) | ±7V to ±16V | V | |
| Supply Voltage Range (Single) | 14V to 32V | V | |
| Output Swing | 28VPP | V | ±16V supply, 100Ω load |
| Linear Output Current | ±420 | mA | Typical |
| Power Supply Current | 16.8 | mA | Trimmed, low temp coefficient |
| Harmonic Distortion (HD2 & HD3) | < -75dBc | dBc | 50MHz, VO = 10VPP, 100Ω load |
| Rise/Fall Time | 1.3 | ns | 10V step |
| Overshoot | 1.5% | 10V step, AV = 5V/V | |
| Package | VQFN-16 (RGT), HSOIC-8 (DDA) | PowerPAD™ available |
Key Features
- High bandwidth and slew rate for low distortion in high-frequency applications.
- Capable of driving high capacitive loads with peak output currents exceeding 500mA.
- Optimized for low harmonic distortion, ensuring clean signal amplification.
- Versatile supply voltage ranges for both dual and single power configurations.
- Compact packaging options, including PowerPAD™ for enhanced thermal performance.
Applications
The THS3491IDDAT is ideal for use in high-speed signal processing applications, such as professional audio equipment, test and measurement instruments, and telecommunications systems. Its ability to maintain low distortion at high frequencies makes it suitable for driving demanding loads in these fields. Additionally, its robust output current capabilities enable it to handle high capacitive loads, making it a reliable choice for advanced electronic designs.
Q & A
What is the bandwidth of the THS3491IDDAT?
The THS3491IDDAT offers a bandwidth of 900MHz for small signals (2VPP) and 320MHz for large signals (10VPP) at a gain of 5V/V.
What is the slew rate of this amplifier?
The slew rate is 8000V/µs, enabling rapid signal transitions with minimal distortion.
What is the output current capability of the THS3491IDDAT?
It can deliver a peak output current of over 500mA, making it suitable for driving high capacitive loads.
What are the supply voltage ranges supported?
The amplifier supports dual supply voltages from ±7V to ±16V and single supply voltages from 14V to 32V.
What is the harmonic distortion performance?
Harmonic distortion (HD2 and HD3) is less than -75dBc at 50MHz with a 10VPP output.
What are the packaging options available?
The THS3491IDDAT is available in VQFN-16 (RGT) and HSOIC-8 (DDA) packages, with PowerPAD™ for improved thermal management.
What is the input voltage noise?
The input voltage noise is 1.7nV/√Hz, ensuring low noise performance in sensitive applications.
What is the output swing of the amplifier?
The output swing is 28VPP with a ±16V supply and a 100Ω load.
What is the rise/fall time of the THS3491IDDAT?
The rise and fall times are 1.3ns for a 10V step, ensuring fast signal response.
What is the overshoot performance?
The overshoot is less than 1.5% for a 10V step at a gain of 5V/V.
