Overview
The THS4281DBVRG4, produced by Texas Instruments, is a very low-power, high-speed, rail-to-rail input and output voltage-feedback operational amplifier. This component is designed to operate over a wide power-supply range, making it suitable for various applications, particularly in portable and battery-powered devices. The THS4281 is fabricated using the BiCom-II process and is known for its high performance with minimal power consumption.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Quiescent Current | 750 μA (at 5 V) | μA |
| Bandwidth | 90 MHz (at Gain = +1) | MHz |
| Slew Rate | 35 V/μs | V/μs |
| Common-Mode Input Range | 400 mV beyond the rails | mV |
| Output Voltage Swing | Within 150 mV from the rails (RL = 1 kΩ) | mV |
| Settling Time (2-V Step) | 78 ns to 0.1%, 150 ns to 0.01% | ns |
| Input Offset Voltage | 2.5 mV (Max at +25°C) | mV |
| Output Current | 30 mA (Sourcing, RL = 10 Ω, 5 V) | mA |
| Supply Voltages | 2.7 V to 15 V (Single supply), ±1.35 V to ±7.5 V (Dual supply) | V |
| Packages | SOT23-5, MSOP-8, SOIC-8 |
Key Features
- Very Low Quiescent Current: 750 μA at 5 V, ensuring long battery life in portable applications.
- Rail-to-Rail Input and Output: Allows for high-side current sensing without phase reversal concerns.
- High Bandwidth and Slew Rate: 90 MHz bandwidth and 35 V/μs slew rate for high-speed applications.
- Low Distortion: –91 dBc at 100 kHz and –67 dBc at 1 MHz, suitable for high-resolution ADCs.
- Fast Settling Time: 78 ns to 0.1% and 150 ns to 0.01% for a 2-V step.
- Low Voltage Noise: 12.5 nV/√Hz for low noise performance.
- High Output Current: > 30 mA (Sourcing, RL = 10 Ω, 5 V).
Applications
- Portable/Battery-Powered Applications: Ideal for devices requiring low power consumption and high performance.
- High Channel Count Systems: Suitable for systems with multiple channels requiring low power and high speed.
- ADC Buffering: Excellent for buffering high-resolution ADCs sampling less than 2 MSPS.
- High-Side Current Sensing: Allows for accurate current sensing without phase reversal.
Q & A
- What is the quiescent current of the THS4281?
The quiescent current of the THS4281 is 750 μA at 5 V.
- What is the bandwidth of the THS4281 at a gain of +1?
The bandwidth of the THS4281 at a gain of +1 is 90 MHz.
- What is the slew rate of the THS4281?
The slew rate of the THS4281 is 35 V/μs.
- What is the common-mode input range of the THS4281?
The common-mode input range extends 400 mV beyond the rails.
- How much does the output voltage swing from the rails with a 1 kΩ load?
The output voltage swings within 150 mV from the rails with a 1 kΩ load.
- What is the settling time for a 2-V step to 0.1% and 0.01%?
The settling time is 78 ns to 0.1% and 150 ns to 0.01% for a 2-V step.
- What is the maximum input offset voltage at +25°C?
The maximum input offset voltage at +25°C is 2.5 mV.
- What is the output current capability of the THS4281?
The THS4281 can source more than 30 mA with a 10 Ω load at 5 V.
- What are the available package options for the THS4281?
The THS4281 is available in SOT23-5, MSOP-8, and SOIC-8 packages.
- What are some typical applications of the THS4281?
Typical applications include portable/battery-powered devices, high channel count systems, ADC buffering, and high-side current sensing.
