Overview
The THS4531IDR from Texas Instruments is an ultra-low power, fully-differential operational amplifier designed for low-power data acquisition systems and high-density applications. This device features a fully-differential architecture with rail-to-rail output and negative rail input, making it ideal for applications where power consumption and dissipation are critical. The THS4531IDR operates over an extended industrial temperature range from –40°C to +125°C and is available in an 8-pin SOIC package.
Key Specifications
| Parameter | Value |
|---|---|
| Voltage Supply | 2.5 V to 5.5 V |
| Quiescent Current | 250 µA |
| Power-Down Mode Current | 0.5 µA (typical) |
| Bandwidth | 36 MHz |
| Slew Rate | 200 V/µs |
| Total Harmonic Distortion (THD) | –120 dBc at 1 kHz (1 V RMS, RL= 2 kΩ) |
| Input Voltage Noise | 10 nV/√Hz (f = 1 kHz) |
| Offset Voltage Drift | ±4 µV/°C (–40°C to +125°C) |
| Open-Loop Gain | 114 dB |
| Output Type | Rail-to-Rail Output (RRO) |
| Input Type | Negative Rail Input (NRI) |
| Package | 8-pin SOIC (D) |
| Operating Temperature Range | –40°C to +125°C |
Key Features
- Ultra-low power consumption: 250 µA quiescent current and 0.5 µA in power-down mode.
- Fully-differential architecture with rail-to-rail output and negative rail input.
- Accurate output common-mode control for dc coupling with analog-to-digital converters (ADCs).
- High DC accuracy with low offset voltage drift.
- High bandwidth and slew rate: 36 MHz and 200 V/µs, respectively.
- Low total harmonic distortion: –120 dBc at 1 kHz.
- Low input voltage noise: 10 nV/√Hz at 1 kHz.
- Extended industrial temperature range operation: –40°C to +125°C.
Applications
The THS4531IDR is particularly suited for low-power data acquisition systems, high-density applications, and general-purpose differential signal conditioning. It is ideal for interfacing single-ended ground-referenced signal sources to successive-approximation register (SAR) and delta-sigma (ΔΣ) ADCs using single-supply power from 2.5 V to 5 V.
Q & A
- What is the typical quiescent current of the THS4531IDR?
The typical quiescent current is 250 µA. - What is the power-down mode current of the THS4531IDR?
The power-down mode current is 0.5 µA (typical). - What is the bandwidth of the THS4531IDR?
The bandwidth is 36 MHz. - What is the slew rate of the THS4531IDR?
The slew rate is 200 V/µs. - What is the total harmonic distortion (THD) of the THS4531IDR at 1 kHz?
The THD is –120 dBc at 1 kHz (1 V RMS, RL= 2 kΩ). - What is the input voltage noise of the THS4531IDR at 1 kHz?
The input voltage noise is 10 nV/√Hz at 1 kHz. - What is the offset voltage drift of the THS4531IDR over temperature?
The offset voltage drift is ±4 µV/°C (–40°C to +125°C). - What type of output does the THS4531IDR have?
The THS4531IDR has a rail-to-rail output (RRO). - What type of input does the THS4531IDR have?
The THS4531IDR has a negative rail input (NRI). - In what package is the THS4531IDR available?
The THS4531IDR is available in an 8-pin SOIC (D) package.
