Overview
The THS4541IRUNR is a low-power, voltage-feedback, fully differential amplifier (FDA) produced by Texas Instruments. It is designed for low-power data acquisition systems where high density is critical, particularly in high-performance analog-to-digital converter (ADC) or digital-to-analog converter (DAC) interface designs. The amplifier features an input common-mode range below the negative rail and rail-to-rail output, making it ideal for interfacing dc-coupled, ground-centered source signals with various types of ADCs and DACs.
Key Specifications
| Specification | Value |
|---|---|
| Bandwidth | 500MHz (G = 2V/V) |
| Gain Bandwidth Product | 850MHz |
| Slew Rate | 1500V/µs |
| HD2 | –95dBc at 10MHz (2VPP, RL = 500Ω) |
| HD3 | –90dBc at 10MHz (2VPP, RL = 500Ω) |
| Input Voltage Noise | 2.2nV/√Hz (f > 100kHz) |
| Offset Drift | ±0.5µV/°C (typical) |
| Input Common-Mode Range | Below the negative rail |
| Output Type | Rail-to-Rail Output (RRO) |
| Power Supply | Single-supply: 2.7V to 5.4V, Split-supply: ±1.35V to ±2.7V |
| Quiescent Current | 10.1mA (5V supply) |
| Power-Down Current | 2µA (typical) |
| Operating Temperature Range | –40°C to +125°C |
| Package Types | 16-pin VQFN, 10-pin WQFN |
Key Features
- Fully differential amplifier (FDA) architecture
- Negative rail input (NRI) and rail-to-rail output (RRO)
- Robust operation for Rload ≥ 50Ω
- Output common-mode control
- Low offset drift: ±0.5µV/°C (typical)
- High bandwidth and gain bandwidth product
- Low input voltage noise: 2.2nV/√Hz (f > 100kHz)
- Power-down capability with low current consumption: 2µA (typical)
Applications
The THS4541IRUNR is designed for use in low-power data acquisition systems, particularly in high-performance analog-to-digital converter (ADC) or digital-to-analog converter (DAC) interface designs. It is suitable for interfacing single-ended, ground-referenced, bipolar signal sources with successive approximation register (SAR), delta-sigma (ΔΣ), or pipeline ADCs.
Q & A
- What is the bandwidth of the THS4541IRUNR?
The bandwidth of the THS4541IRUNR is 500MHz at a gain of 2V/V.
- What is the gain bandwidth product of the THS4541IRUNR?
The gain bandwidth product of the THS4541IRUNR is 850MHz.
- What is the slew rate of the THS4541IRUNR?
The slew rate of the THS4541IRUNR is 1500V/µs.
- What are the harmonic distortion specifications of the THS4541IRUNR?
The THS4541IRUNR has HD2 of –95dBc and HD3 of –90dBc at 10MHz with a 2VPP signal and RL = 500Ω.
- What is the input voltage noise of the THS4541IRUNR?
The input voltage noise of the THS4541IRUNR is 2.2nV/√Hz for frequencies above 100kHz.
- What is the offset drift of the THS4541IRUNR?
The offset drift of the THS4541IRUNR is ±0.5µV/°C (typical).
- What are the power supply options for the THS4541IRUNR?
The THS4541IRUNR can operate on a single-supply voltage range of 2.7V to 5.4V or a split-supply voltage range of ±1.35V to ±2.7V.
- What is the quiescent current of the THS4541IRUNR?
The quiescent current of the THS4541IRUNR is 10.1mA at a 5V supply.
- Does the THS4541IRUNR have power-down capability?
- In what temperature range can the THS4541IRUNR operate?
The THS4541IRUNR can operate over a temperature range of –40°C to +125°C.
