STMicroelectronics TS974IPT

Overview

TS974IPT from STMicroelectronics is a quad rail-to-rail output operational amplifier optimized for low-noise audio pre-amplification in battery-powered systems, featuring 4 nV/√Hz input voltage noise, 0.003% THD at 1 kHz, and 12 MHz gain bandwidth product with ±2.4 V output swing at ±2.5 V supply.

For engineers reviewing the TS974IPT datasheet, TS974IPT pinout, TS974IPT application, or TS974IPT equivalent, this device is selected for portable audio signal conditioning where low distortion, wide supply range (2.7–10 V), and thermal efficiency in TSSOP14 packaging are critical design requirements.

Technical Context

The TS974IPT operates as a precision voltage amplifier with rail-to-rail output stage enabling full dynamic range utilization near supply rails. Its bipolar input stage delivers low input bias current (200–1000 nA) and stable offset drift (5 µV/°C), while internal compensation ensures unity-gain stability with 60° phase margin across load conditions.

Designed for single- or dual-supply operation, it supports common-mode input range from V_DD + 1.15 V to V_CC – 1.15 V and maintains 85 dB CMRR and 70 dB SVR over temperature. The 4 V/µs slew rate and 12 MHz GBP enable faithful reproduction of audio-band transients without slew-induced distortion.

Key Specifications

Pinout & Package

TSSOP14 package: 4.9–5.1 mm × 6.2–6.6 mm × 1.0–1.05 mm body height, 0.65 mm pitch, exposed pad optional for thermal enhancement.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad rail-to-rail output op-amp applications.

Compared with TLV2464IDR and OPA4340UA, the TS974IPT uniquely balances low noise (4 nV/√Hz), high slew rate (4 V/µs), and wide supply range (2.7–10 V) - making it the only option among the three qualified for portable audio preamplification with THD <0.005% at 1 kHz.

Availability

TS974IPT is available at Aetrix Electronics and suitable for portable audio preamplification, instrumentation signal conditioning, and professional line driver applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for TS974IPT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering intelligent power, sensing, and control solutions for automotive, industrial, and consumer markets.

The TS97x family targets portable and battery-powered equipment requiring rail-to-rail output swing, low noise, and low distortion - specifically engineered for audio pre-amplification and precision analog signal chains.

FAQ

What is the maximum junction temperature rating for TS974IPT?

The TS974IPT has a maximum junction temperature of 150°C, validated under continuous operation with thermal resistance junction-to-ambient (R_thJA) of 100°C/W in TSSOP14 packaging. This allows reliable operation at ambient temperatures up to 125°C when PCB copper area and airflow meet minimum layout guidelines specified in ST's AN4185.

Does TS974IPT support single-supply operation?

Yes, TS974IPT operates from a single 2.7–10 V supply, with common-mode input range extending from V_DD + 1.15 V to V_CC – 1.15 V. When V_DD = 0 V, inputs accept signals from 1.15 V to (V_CC – 1.15 V), enabling direct interface with 3.3 V microcontrollers and sensors without level-shifting circuitry.

What is the thermal resistance junction-to-case (R_thJC) for TS974IPT in TSSOP14?

The thermal resistance junction-to-case (R_thJC) for TS974IPT in TSSOP14 package is 32°C/W, measured from die to exposed pad surface. This value assumes proper soldering of the exposed pad to a minimum 100 mm² copper pour on the PCB, enabling efficient heat transfer to the board for sustained 2.8 mA quiescent current operation.

Can TS974IPT drive capacitive loads directly?

TS974IPT is unity-gain stable but exhibits reduced phase margin with capacitive loads >100 pF. For loads exceeding this, a 10–100 Ω series resistor must be placed between output and capacitance to isolate the pole. ST recommends verifying stability using the test circuit in Figure 11 of DocID6031 Rev 11 when driving cables or ADC input capacitance.