Overview
The THS4531IRUNT 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 is characterized by its low power consumption and dissipation, making it ideal for applications where energy efficiency is critical.
The THS4531IRUNT features an input common-mode range below the negative rail and rail-to-rail output, which enables easy interface from single-ended ground-referenced signal sources to successive-approximation registers (SARs) and delta-sigma (ΔΣ) analog-to-digital converters (ADCs) using a single-supply voltage from 2.5 V to 5.5 V.
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 |
| Operating Temperature Range | –40°C to +125°C |
| Package Type | 10-Pin WQFN (RUN) |
Key Features
- Ultra-low power consumption with a quiescent current of 250 µA and a power-down mode current of 0.5 µA (typical)
- Fully-differential architecture with input common-mode range below the negative rail and rail-to-rail output
- Accurate output common-mode control for DC coupling with ADCs
- High DC accuracy with low offset voltage drift (±4 µV/°C)
- High bandwidth of 36 MHz and slew rate of 200 V/µs
- Low total harmonic distortion (THD) of –120 dBc at 1 kHz
- Low input voltage noise of 10 nV/√Hz at 1 kHz
Applications
The THS4531IRUNT is particularly suited for low-power data acquisition systems and high-density applications where power consumption and dissipation are critical. It is valuable in various scenarios such as:
- General-purpose, low-power differential signal conditioning
- Driving analog-to-digital converters (ADCs), including successive-approximation registers (SARs) and delta-sigma (ΔΣ) ADCs
- Single-ended to differential signal conversion in single-supply systems
Q & A
- What is the voltage supply range for the THS4531IRUNT?
The voltage supply range for the THS4531IRUNT is from 2.5 V to 5.5 V.
- What is the quiescent current of the THS4531IRUNT?
The quiescent current of the THS4531IRUNT is 250 µA.
- What is the power-down mode current of the THS4531IRUNT?
The power-down mode current of the THS4531IRUNT is 0.5 µA (typical).
- What is the bandwidth of the THS4531IRUNT?
The bandwidth of the THS4531IRUNT is 36 MHz.
- What is the slew rate of the THS4531IRUNT?
The slew rate of the THS4531IRUNT is 200 V/µs.
- What is the total harmonic distortion (THD) of the THS4531IRUNT at 1 kHz?
The total harmonic distortion (THD) of the THS4531IRUNT at 1 kHz is –120 dBc (1 V RMS, RL = 2 kΩ).
- What is the input voltage noise of the THS4531IRUNT at 1 kHz?
The input voltage noise of the THS4531IRUNT at 1 kHz is 10 nV/√Hz.
- What is the operating temperature range of the THS4531IRUNT?
The operating temperature range of the THS4531IRUNT is from –40°C to +125°C.
- What package types are available for the THS4531IRUNT?
The THS4531IRUNT is available in a 10-Pin WQFN (RUN) package.
- What are the primary applications of the THS4531IRUNT?
The primary applications of the THS4531IRUNT include low-power data acquisition systems, high-density applications, and general-purpose differential signal conditioning.
- Can the THS4531IRUNT be used with single-ended signal sources?
Yes, the THS4531IRUNT can be used with single-ended signal sources to drive ADCs such as SARs and ΔΣ ADCs using a single-supply voltage.
