Overview
The THS4531AIDR from Texas Instruments is a low-power, fully differential amplifier designed for applications where power consumption and dissipation are critical. This device features an input common-mode range below the negative rail and rail-to-rail output, making it ideal for low-power data acquisition systems and high-density applications. The THS4531AIDR is characterized by its ultra-low power consumption, high bandwidth, and excellent signal fidelity, making it a valuable tool for general-purpose, low-power differential signal conditioning applications.
Key Specifications
| Parameter | Value |
|---|---|
| Supply Voltage | 2.5 V to 5.5 V |
| Quiescent Current | 250 µA |
| Power-Down Mode Current | 0.5 µA (Typical) |
| Bandwidth | 36 MHz (Av = 1 V/V) |
| Slew Rate | 200 V/µs |
| Total Harmonic Distortion (THD) | –120 dBc at 1 kHz (1 V RMS, R_L = 2 kΩ) |
| Input Voltage Noise | 10 nV/√Hz (f = 1 kHz) |
| Offset Voltage (V_OS) | ±100 µV |
| Offset Voltage Drift (V_OS Drift) | ±3 µV/°C (–40°C to +125°C) |
| Open-Loop Gain (A_OL) | 114 dB |
| Operating Temperature Range | –40°C to +125°C |
| Package Options | 8-Pin SOIC (D), 8-Pin VSSOP (DGK), 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 rail-to-rail output (RRO) and negative rail input (NRI).
- High DC accuracy with an offset voltage of ±100 µV and an offset voltage drift of ±3 µV/°C.
- Accurate output common-mode control for DC coupling when driving analog-to-digital converters (ADCs).
- High bandwidth of 36 MHz and a slew rate of 200 V/µs.
- Compact packaging options including 8-Pin SOIC, 8-Pin VSSOP, and 10-Pin WQFN.
Applications
- Low-power data acquisition systems.
- High-density applications where power consumption and dissipation are critical.
- Driving analog-to-digital converters (ADCs), including successive-approximation registers (SARs) and delta-sigma (ΔΣ) ADCs.
- General-purpose, low-power differential signal conditioning applications.
- Test and measurement systems, medical equipment, and battery-powered devices.
Q & A
- What is the supply voltage range for the THS4531AIDR?
The supply voltage range for the THS4531AIDR is 2.5 V to 5.5 V.
- What is the quiescent current of the THS4531AIDR?
The quiescent current of the THS4531AIDR is 250 µA.
- What is the bandwidth of the THS4531AIDR?
The bandwidth of the THS4531AIDR is 36 MHz (Av = 1 V/V).
- What are the packaging options for the THS4531AIDR?
The packaging options include 8-Pin SOIC, 8-Pin VSSOP, and 10-Pin WQFN.
- What is the operating temperature range for the THS4531AIDR?
The operating temperature range for the THS4531AIDR is –40°C to +125°C.
- What are some typical applications for the THS4531AIDR?
Typical applications include low-power data acquisition systems, high-density applications, driving ADCs, and general-purpose differential signal conditioning.
- Does the THS4531AIDR support power-down mode?
- What is the slew rate of the THS4531AIDR?
The slew rate of the THS4531AIDR is 200 V/µs.
- What is the input voltage noise of the THS4531AIDR?
The input voltage noise of the THS4531AIDR is 10 nV/√Hz (f = 1 kHz).
- Does the THS4531AIDR have accurate output common-mode control?
