Overview
The THS4531AIDGK is a low-power, fully differential amplifier produced by Texas Instruments. This device is designed for low-power data acquisition systems and high-density applications where power consumption and dissipation are critical. It features a fully differential architecture with an input common-mode range below the negative rail and rail-to-rail output. The THS4531AIDGK is particularly useful for interfacing single-ended ground-referenced signal sources to successive-approximation registers (SARs) and delta-sigma (ΔΣ) analog-to-digital converters (ADCs) using single-supply 2.5-V to 5-V power.
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 (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 (VOS) | ±100 µV |
| Offset Voltage Drift (VOSDrift) | ±3 µV/˚C (–40°C to +125°C) |
| Open-Loop Gain (AOL) | 114 dB |
| Output Type | Rail-to-Rail Output (RRO) |
| Input Type | Negative Rail Input (NRI) |
| Package Options | 8-Pin SOIC (D), 8-Pin VSSOP (DGK), 10-Pin WQFN (RUN) |
| Operating Temperature Range | –40°C to +125°C |
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.
- 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.
- High DC accuracy with offset voltage (VOS) of ±100 µV and offset voltage drift (VOSDrift) of ±3 µV/˚C.
- Accurate output common-mode control for DC coupling with ADCs.
- Available in 8-Pin SOIC (D), 8-Pin VSSOP (DGK), and 10-Pin WQFN (RUN) packages.
Applications
- Low-power data acquisition systems.
- High-density applications where power consumption and dissipation are critical.
- General-purpose, low-power differential signal conditioning.
- Interfacing single-ended ground-referenced signal sources to successive-approximation registers (SARs) and delta-sigma (ΔΣ) ADCs using single-supply power.
- Industrial applications such as interfaces to Sin/Cos encoders and position encoders.
Q & A
- What is the voltage supply range for the THS4531AIDGK?
The voltage supply range is 2.5 V to 5.5 V.
- What is the quiescent current of the THS4531AIDGK?
The quiescent current is 250 µA.
- What is the power-down mode current of the THS4531AIDGK?
The power-down mode current is 0.5 µA (typical).
- What is the bandwidth of the THS4531AIDGK?
The bandwidth is 36 MHz (Av = 1 V/V).
- What is the slew rate of the THS4531AIDGK?
The slew rate is 200 V/µs.
- What is the total harmonic distortion (THD) of the THS4531AIDGK?
The THD is –120 dBc at 1 kHz (1 V RMS, R L= 2 kΩ).
- What is the input voltage noise of the THS4531AIDGK?
The input voltage noise is 10 nV/√Hz at 1 kHz.
- What are the package options for the THS4531AIDGK?
The package options are 8-Pin SOIC (D), 8-Pin VSSOP (DGK), and 10-Pin WQFN (RUN).
- What is the operating temperature range for the THS4531AIDGK?
The operating temperature range is –40°C to +125°C.
- What are some typical applications for the THS4531AIDGK?
Typical applications include low-power data acquisition systems, high-density applications, and general-purpose differential signal conditioning.
