STMicroelectronics TS974IN

Overview

TS974IN from STMicroelectronics is a quad rail-to-rail output operational amplifier optimized for low-noise, low-distortion audio and portable signal conditioning. It delivers 4 nV/√Hz input voltage noise, 0.003% THD at 1 kHz, 12 MHz gain-bandwidth product, and ±2.4 V output swing with ±2.5 V supplies. It operates from 2.7 V to 10 V single or dual supply and is housed in a 14-pin DIP package for prototyping and industrial instrumentation.

For engineers reviewing the TS974IN datasheet, TS974IN pinout, TS974IN application, or TS974IN equivalent, this page provides verified electrical parameters, validated DIP14 pin mapping, real-world audio and sensor interface use cases, and two functionally comparable alternatives with documented performance trade-offs.

Technical Context

The TS974IN integrates four independent high-fidelity op-amps on a single die, each featuring a bipolar input stage for low voltage noise and rail-to-rail CMOS output stage enabling full dynamic range utilization near supply rails. Its 12 MHz GBP and 4 V/µs slew rate support stable unity-gain buffer and active filter configurations up to ~1 MHz.

Designed for battery-powered systems, it maintains rail-to-rail output swing down to 2.7 V supply (±1.35 V), supports common-mode input range from VDD +1.15 V to VCC −1.15 V, and includes 2 kV HBM ESD protection and Class A latch-up immunity - critical for handheld test equipment and audio front-ends.

Key Specifications

Pinout & Package

TS974IN is supplied in a 14-pin dual in-line package (DIP14) with 2.54 mm pitch, through-hole mounting, and 0.3 inch body width. The package features internal thermal resistance R_thjc = 33 °C/W and R_thja = 80 °C/W, supporting continuous operation up to +125°C ambient when PCB layout provides adequate copper area.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad low-noise op-amp applications.

Compared with TL074CDR and OPA4134UA, TS974IN uniquely combines rail-to-rail output, 4 nV/√Hz noise, and 2.7 V operation - making it the only choice among the three for battery-powered audio and sensor front-ends requiring full dynamic range at low supply voltages.

Availability

TS974IN is available at Aetrix Electronics and suitable for portable audio pre-amplifiers, industrial sensor signal conditioners, professional line-level drivers, and battery-powered test equipment requiring stable component supply and long-term DIP-package availability.

Supply support for TS974IN 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, mixed-signal, power, and microcontroller products for industrial, automotive, and consumer markets.

The TS97x family was developed specifically for portable and battery-powered applications demanding low-noise, rail-to-rail output, and wide supply flexibility - targeting audio, instrumentation, and sensor interface segments where dynamic range and power efficiency are critical.

FAQ

Can TS974IN operate from a single 3.3 V supply?

Yes. TS974IN supports single-supply operation from 2.7 V to 10 V. With 3.3 V, its common-mode input range is from 1.15 V to 2.15 V, and output swings from ~0.1 V to ~3.2 V - sufficient for driving 12-bit+ ADCs and most analog signal chains. Input bias current remains below 750 nA across this range.

What is the maximum capacitive load the TS974IN can drive without instability?

TS974IN is stable with capacitive loads up to 100 pF when configured as a unity-gain buffer, as confirmed by phase margin ≥60° and gain margin ≥10 dB in the datasheet (Figure 9–12). For loads >100 pF, a series resistor (≥100 Ω) between output and capacitor is required to maintain stability.

Does TS974IN have internal ESD protection on all pins?

Yes. TS974IN includes 2 kV human-body-model (HBM) ESD protection on all pins per JEDEC JS-001, verified in absolute maximum ratings (Table 1). It also features Class A latch-up immunity, meaning it withstands transient overvoltage events without destructive latch-up under normal operating conditions.

How does TS974IN's noise performance compare to TS972IN?

TS974IN and TS972IN share identical noise specifications: both deliver 4 nV/√Hz input voltage noise and 0.003% THD at 1 kHz. The only functional difference is channel count - TS972IN is dual-channel in DIP8/SO8, while TS974IN is quad-channel in DIP14/SO14 - with matching per-channel AC/DC parameters and pin-compatible channel layouts.