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Home > Products > Integrated Circuits (ICs) > Linear > Instrumentation, Op Amps, Buffer Amps

STMicroelectronics TS524IN

Name: TS524IN
Brand: STMicroelectronics
SKU: TS524IN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS524IN

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

Package:: 14-DIP (0.300", 7.62mm)

Datasheet:: TS524IN.pdf

Description:: IC AUDIO 4 CIRCUIT 14DIP

Quantity:: RFQ Add To RFQ list

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Inventory:4,694

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Product details

Overview

TS524IN from STMicroelectronics is a precision low-noise quad operational amplifier in 14-pin DIP package, designed for high-fidelity audio signal conditioning. It delivers 950 µV max input offset voltage, 4.5 nV/√Hz input voltage noise, 15 MHz gain bandwidth product, 7 V/µs slew rate, and 0.002% THD at 20 Hz–20 kHz - enabling clean amplification in preamp and active filter stages of professional audio equipment.

For engineers reviewing the TS524IN datasheet, TS524IN pinout, TS524IN application, or TS524IN equivalent, key selection criteria include its rail-to-rail output swing (±14.2 V into 10 kΩ), symmetrical ±29/±37 mA source/sink capability, wide ±2.5 to ±15 V supply range, and robust 2 kV ESD protection - critical for low-distortion analog front-ends in studio mixers and broadcast interfaces.

Technical Context

The TS524IN integrates four independent high-performance op-amps on a single monolithic die with matched input transistor pairs to minimize offset drift (2 µV/°C) and channel-to-channel mismatch. Its macromodel-validated architecture supports stable unity-gain operation (55° phase margin, CL = 0 pF) and full-power bandwidth up to 120 kHz at 27 V_PP.

It operates across –40°C to +105°C with ±13 V common-mode input range and 85–100 dB large-signal voltage gain. Internal protection includes ESD diodes rated to 2 kV (HBM), and absolute maximum ratings permit ±30 V differential input and ±18 V supply rails - supporting ruggedized industrial audio monitoring systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Offset Voltage	0.95–1.8 mV (enables DC-coupled gain stages with <1 mV error at room temperature)
Gain Bandwidth Product	10–15 MHz (supports stable closed-loop gain ≥10 at 1 MHz for anti-aliasing filters)
Slew Rate	5–7 V/µs (ensures ≤0.002% THD at 3 V_RMS, 20 kHz with AV = +1)
Input Voltage Noise	4.5 nV/√Hz @ 1 kHz (critical for microphone preamp gain ≥60 dB without audible hiss)
Output Voltage Swing	±14.2 V into 10 kΩ (delivers 28.4 V_PP headroom for line-level signals in ±15 V systems)
Common-Mode Rejection	80–100 dB (rejects power-supply ripple and ground noise in balanced-input circuits)
Supply Current per Amp	2–4 mA (allows four-channel operation within 12 mA total at ±15 V, minimizing thermal load)

Pinout & Package

TS524IN is supplied in a 14-pin plastic dual in-line package (DIP14) with 2.54 mm lead pitch, 20.0 mm body width, and 8.5 mm body depth. Pin 1 is located at the left end of the top row when viewing the top side with notch or dot oriented upward.

Pin/Terminal	Circuit Role	Design Meaning
1, 5, 9, 12	Inverting Input (Amp 1–4)	Differential input node for each op-amp; accepts signal inversion and feedback network connection
2, 6, 10, 13	Non-inverting Input (Amp 1–4)	Differential input node referenced to ground or bias network; sets input common-mode point
3, 7, 11, 14	Output (Amp 1–4)	Class-AB buffered output capable of ±29/±37 mA drive into 600 Ω loads
4	Positive Supply (V_CC+)	Connects to +V rail; supports ±2.5 V to ±15 V operation with internal current limiting
8	Negative Supply (V_CC−)	Connects to −V rail; shares same voltage rating and ESD protection as V_CC+

Key Features

Feature	Design Value
Low Distortion Performance	0.002% THD at 20 Hz–20 kHz enables transparent audio reproduction without harmonic coloration
High Channel Separation	120 dB at 20 Hz–20 kHz prevents crosstalk between adjacent amplifier channels in multi-track systems
Wide Supply Range	Operates from ±2.5 V to ±15 V - supports both low-voltage portable gear and high-headroom studio designs
Macromodel Availability	SPICE-compatible macro-model included for accurate AC/DC/transient simulation of closed-loop behavior
ESD Robustness	2 kV HBM rating protects against handling damage during PCB assembly and field service

Applications

Studio Microphone Preamp

Active Crossover Network

Use Scenario: Amplifying low-level condenser mic signals (–60 dBu) before ADC conversion in digital audio workstations.

IC Role / Device Role / Timing Role: First-stage low-noise voltage amplifier with DC-coupled gain of 60 dB and selectable input impedance.

Use Value: 4.5 nV/√Hz input noise ensures SNR ≥110 dB(A) over 20 Hz–20 kHz, preserving transient detail and dynamic range.

Use Scenario: Implementing 24 dB/octave Linkwitz-Riley filters to split full-range signals into LF/MF/HF bands for multi-driver loudspeakers.

IC Role / Device Role / Timing Role: Quad-configured active filter section with matched gain blocks and low inter-channel phase shift.

Use Value: 120 dB channel separation and 15 MHz GBP enable precise alignment of crossover points without amplitude or timing skew.

Professional Line Driver

Broadcast Audio Mixer Bus

Use Scenario: Driving long balanced cables (≥100 m) from mixing console outputs to remote stage boxes or recording interfaces.

IC Role / Device Role / Timing Role: Output buffer with high slew rate and symmetrical ±37 mA sink/source to maintain signal integrity under capacitive load.

Use Value: ±14.2 V swing into 10 kΩ and 37 Ω output impedance ensure >24 dBu output level with <0.01% THD at 100 kHz.

Use Scenario: Summing multiple program sources (mic, playback, effects) onto a stereo master bus in OB van or control room consoles.

IC Role / Device Role / Timing Role: High-linearity summing amplifier with low offset drift to prevent DC buildup across cascaded gain stages.

Use Value: 2 µV/°C offset drift and 85–100 dB open-loop gain minimize cumulative DC error across 16+ summed channels.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
NE5534AD	Higher input bias current (300 nA typ.), lower GBP (10 MHz), no integrated macromodel	Less suitable for high-Z sensor interfaces; requires external compensation for stability at high gains	Preferred where legacy design compatibility matters more than noise or model support
OPA4134UA	Lower noise (3.5 nV/√Hz), higher GBP (8 MHz), but only ±13.5 V output swing into 2 kΩ	Better for ultra-low-noise mic preamps, but limited headroom in ±15 V line driver roles	Chosen when noise dominates over output drive capability in battery-powered portable gear

Compared with NE5534AD and OPA4134UA, TS524IN offers superior balance of low noise, high output drive, and verified SPICE modeling - making it optimal for new studio-grade analog signal chains requiring predictable performance across temperature and supply variation.

Availability

TS524IN is available at Aetrix Electronics and suitable for professional audio equipment, broadcast infrastructure, and high-end test instrumentation requiring stable component supply, long-term manufacturability, and consistent parametric performance across production lots.

Supply support for TS524IN 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, specializing in analog, power, microcontrollers, and automotive ICs with vertical manufacturing and rigorous AEC-Q100 qualification processes.

The TS524 belongs to ST's precision analog op-amp product line, engineered specifically for high-fidelity audio signal processing where low distortion, low noise, and channel matching are non-negotiable design requirements.

FAQ

What is the maximum safe supply voltage for TS524IN?

The absolute maximum supply voltage is ±18 V, but recommended operating range is ±2.5 V to ±15 V per the electrical characteristics table. Operation beyond ±15 V risks exceeding junction temperature limits under load, especially at elevated ambient temperatures above +85°C.

Can TS524IN drive 600 Ω loads effectively?

Yes - it delivers ±12.7 V output swing into 600 Ω with 15–29 mA source/sink capability. At 1 kHz, THD remains below 0.002%, and full-power bandwidth exceeds 120 kHz, satisfying EBU R68 and AES17 line-driving standards for professional audio.

Is the TS524IN pinout compatible with standard quad op-amp layouts?

Yes - it follows industry-standard DIP14 pinout: pins 1/5/9/12 = inverting inputs, 2/6/10/13 = non-inverting inputs, 3/7/11/14 = outputs, pin 4 = V+, pin 8 = V−. This matches LM324, TL074, and NE5534 quad variants, enabling drop-in replacement in many legacy designs.

Does TS524IN require external compensation for unity-gain stability?

No - it achieves 55° phase margin at unity gain with 0 pF load capacitance, and remains stable with up to 100 pF capacitive load. The internal compensation eliminates need for external components in most audio gain stages, reducing board area and cost.

TS524IN Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 14-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

Amplifier Type:: Audio

Number of Circuits:: 4

Output Type:: -

Slew Rate:: 7V/µs

Gain Bandwidth Product:: 15 MHz

-3db Bandwidth:: -

Current - Input Bias:: 250 nA

Voltage - Input Offset:: 950 µV

Current - Supply:: 8mA

Current - Output / Channel:: 37 mA

Voltage - Supply Span (Min):: 5 V

Voltage - Supply Span (Max):: 30 V

Operating Temperature:: -40°C ~ 125°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 14-DIP

TS524IN FAQ

1.How can I place an order for TS524IN through Aetrix?

Please submit a Request for Quotation (RFQ) for TS524IN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for TS524IN reliable?

The price and inventory of TS524IN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS524IN is usually 5 days.

3.What payment methods are accepted for TS524IN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS524IN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS524IN?

TS524IN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS524IN order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for TS524IN?

For technical support, including TS524IN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS524IN requirements.

6.How does Aetrix verify that TS524IN is sourced from the original manufacturer or authorized distributors?

All TS524IN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TS524IN meets industry standards.

7.What is the process for return or replacement of TS524IN?

All TS524IN units undergo pre-shipment inspection (PSI). If there is an issue with TS524IN, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The TS524IN part is unused and in its original packaging.

Return procedure for TS524IN:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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