STMicroelectronics TS972IN

Overview

TS972IN from STMicroelectronics is a dual rail-to-rail output operational amplifier optimized for low-noise audio pre-amplification and portable battery-powered systems. It delivers 4 nV/√Hz input voltage noise, 0.003% THD at 1 kHz, 12 MHz gain-bandwidth product, ±2.4 V output swing at ±2.5 V supply, and operates from 2.7 V to 10 V single or split supplies - deployed in professional audio circuits and handheld communications equipment.

For engineers reviewing the TS972IN datasheet, TS972IN pinout, TS972IN application, or TS972IN equivalent, key selection criteria include its rail-to-rail output drive capability under low-voltage operation, ultra-low distortion for signal fidelity, thermal resistance (85 °C/W junction-to-ambient in DIP8), ESD robustness (2 kV HBM), and compatibility with space-constrained analog front-ends requiring dual-channel precision gain stages.

Technical Context

The TS972IN implements a bipolar input stage with rail-to-rail complementary output transistors, enabling full-swing signal delivery into high-impedance loads without clipping near supply rails. Its 12 MHz GBP and 4 V/µs slew rate support stable unity-gain buffering and moderate-frequency closed-loop configurations up to ~1 MHz with >60° phase margin.

Designed for low-voltage operation down to ±1.35 V (2.7 V total), it maintains specified CMRR (60–85 dB) and PSRR (60–70 dB) across –40°C to +125°C, with input offset voltage drift of only 5 µV/°C and latch-up immunity per Class A standards - critical for sensor interface and portable instrumentation where supply headroom and thermal stability are constrained.

Key Specifications

Pinout & Package

TS972IN is housed in an 8-pin Dual In-line Package (DIP8) with through-hole mounting, 2.54 mm pin pitch, and 9.02–10.16 mm body length. Thermal resistance is 85 °C/W (junction-to-ambient) and 41 °C/W (junction-to-case), supporting moderate-power analog stages without forced cooling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TL072CP and OPA2340UA, TS972IN uniquely balances ultra-low noise (4 nV/√Hz), rail-to-rail output, 12 MHz bandwidth, and DIP8 through-hole compatibility - making it optimal for legacy-compatible, high-fidelity analog stages where supply headroom is tight and distortion must be minimized.

Availability

TS972IN is available at Aetrix Electronics and suitable for portable audio pre-amplification, handheld communications interface, and industrial sensor signal conditioning requiring stable component supply and long-term DIP8 availability.

Supply support for TS972IN 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, designing and manufacturing analog, power, MCU, and sensor solutions for industrial, automotive, and consumer markets.

The TS97x family was developed specifically for low-voltage, low-noise analog signal conditioning in portable and battery-operated equipment - emphasizing rail-to-rail output drive, audio-grade distortion performance, and robust ESD/latch-up immunity.

FAQ

Can TS972IN operate from a single 3.3 V supply?

Yes. TS972IN supports single-supply operation from 2.7 V to 10 V. With a 3.3 V rail, its common-mode input range is 1.15 V to 2.15 V, and output swings within 100 mV of each rail - enabling DC-coupled configurations when input biasing is applied. No level-shifting circuitry is required for basic gain stages.

What is the maximum capacitive load TS972IN can drive stably?

TS972IN remains stable driving up to 100 pF with 2 kΩ load, as verified in the datasheet's phase margin plots (Figure 9). For larger capacitive loads (e.g., >200 pF), a series resistor (≥100 Ω) should be placed between output and load to maintain >60° phase margin and prevent peaking or oscillation.

Does TS972IN have internal ESD protection on all pins?

Yes. TS972IN features integrated ESD protection rated to 2 kV per Human Body Model (HBM) on all pins, including inputs and outputs. This is confirmed in Table 1 (Absolute Maximum Ratings) and applies across the full operating temperature range (–40°C to +125°C).

Is the DIP8 package of TS972IN lead-free and RoHS-compliant?

Yes. TS972IN is supplied in an ECOPACK®-compliant DIP8 package with lead-free second-level interconnect, meeting JEDEC Standard JESD97 and RoHS Directive 2011/65/EU. The inner box label indicates ECOPACK category and soldering profile compliance.