company blog about TI TL972IDGKR Dual 12V 12MHz Low Noise Operational Amplifier

TI TL972IDGKR Dual 12V 12MHz Low Noise Operational Amplifier

Shenzhen Mingjiaoda Electronics Co., Ltd. as a global well-known electronic components distributor, long-term professional supply of TI original TL972IDGKR dual-channel low noise operational amplifiers. This TL972IDGKR high-performance operational amplifier with its rail-to-rail output, low operating voltage and very low noise characteristics, ideal for portable devices, audio systems and precision measurement equipment.

Product Overview and Core Features

The TL972IDGKR is a dual-channel operational amplifier in a VSSOP-8 package optimised for low-voltage, low-power applications.

The TL972IDGKR's most outstanding feature is its ultra-low operating voltage capability down to ±1.35V, while supporting a wide range of operating voltages up to ±6V from dual supplies or 2.7V to 12V from a single supply. This feature makes it particularly suitable for battery-powered portable devices, which can effectively extend the life of the device. In addition, the TL972IDGKR operational amplifier has a rail-to-rail output swing that provides maximum dynamic range over the entire supply voltage range, significantly enhancing signal processing.

In terms of noise performance, the TL972IDGKR excels with an input voltage noise density of only 4nV/√Hz, which, combined with a gain bandwidth of 12MHz and a conversion rate of 5V/µs, makes it ideal for applications with stringent signal integrity requirements, such as audio pre-amplification, sensor signal conditioning, etc. The TL972IDGKR has a common mode rejection ratio (CMRR) of 85dB, which effectively suppresses common mode interference. The TL972IDGKR has a common mode rejection ratio (CMRR) of 85dB, which effectively suppresses common mode interference and ensures signal amplification accuracy.

Detailed Specifications and Performance Analysis

The TL972IDGKR operational amplifiers feature a series of precision-designed electrical parameters to ensure stable performance in a wide range of application scenarios. The following is a detailed analysis of the device's key performance indicators:

Power Supply Characteristics:

Operating voltage range: single supply 2.7V to 12V, dual supply ± 1.35V to ± 6V

Operating supply current: 2mA (typical)

Output current per channel: 80mA (max)

Signal Processing Performance:

Gain Bandwidth Product (GBP): 12MHz

Conversion rate (SR): 5V/µs

Input bias voltage (Vos): 4mV (max)

Input bias current (Ib): 750nA (max)

Noise and Accuracy Metrics:

Input voltage noise density (en): 4nV/√Hz

Common mode rejection ratio (CMRR): 85dB

Voltage Gain: 80dB

Environmental Adaptability:

Operating temperature range: -40°C to +125°C

Package: VSSOP-8 (size 3mm x 3mm x 0.97mm)

Weight: 26.500mg

The TL972IDGKR is available in a miniaturised VSSOP-8 surface mount package measuring only 3mm x 3mm x 0.97mm, making it ideal for space-constrained compact designs. Its wide temperature operating range (-40°C to +125°C) ensures that the device maintains stable performance in harsh environments and meets the reliability requirements of industrial and automotive grade applications.

The TL972IDGKR offers an outstanding balance of power consumption and performance compared to similar products. Its 2mA operating current provides a 12MHz bandwidth while achieving a lower power consumption level in its class, an advantage that is especially valuable in battery-powered systems. In addition, the TL972IDGKR does not support the No Shutdown function, which simplifies the control logic and reduces system complexity.

Typical Application Scenarios and Design Benefits

With its excellent performance parameters, the TL972IDGKR has demonstrated a wide range of application value in a number of fields. The following is an analysis of the main application scenarios and design advantages of this operational amplifier:

Portable and Battery-Powered Devices

The TL972IDGKR's low operating voltage (±1.35V) and low power consumption (2mA operating current) make it ideal for a variety of portable devices. In smart wearable devices, handheld medical instruments and mobile communication terminals, the TL972IDGKR can effectively extend battery life while providing sufficient signal processing bandwidth. Its rail-to-rail output characteristics ensure that the signal dynamic range is not significantly reduced as the battery voltage decreases, maintaining stable system performance.

Audio Processing System

With a low noise density of 4nV/√Hz and a gain bandwidth of 12MHz, the TL972IDGKR is particularly well suited for use as signal conditioning circuits in audio preamplifiers, headphone drivers and professional recording equipment. In audio applications, its low distortion characteristics maintain the fidelity of the original signal, while its 85dB common-mode rejection ratio effectively suppresses power supply noise and environmental interference, improving the signal-to-noise ratio.

Sensor Signal Conditioning

The output signals of various types of sensors (e.g. temperature, pressure, photoelectric sensors) are usually weak and susceptible to interference, and the TL972IDGKR's high-precision (4mV max. input bias voltage) and low-noise characteristics enable it to accurately amplify these tiny signals. The TL972IDGKR is often used in key circuits such as bridge sensor amplification and current-to-voltage conversion in industrial automation and environmental monitoring.

Medical Electronics

Medical equipment requires high signal link accuracy and reliability, and the TL972IDGKR's low noise and high common-mode rejection make it suitable for bioelectric signal acquisition systems such as ECG (electrocardiogram) and EEG (electroencephalogram). Its wide temperature range also meets the need for stable operation of medical equipment under various environmental conditions.

Test and Measurement Instruments

In oscilloscope front-ends, data acquisition cards, and multi-channel measurement systems, the TL972IDGKR's 5V/µs conversion rate and 12MHz bandwidth ensures tracking accuracy when signals change rapidly. Its dual-channel design also saves PCB space and simplifies the layout design of multi-channel systems.