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

STMicroelectronics TS924IN

Name: TS924IN
Brand: STMicroelectronics
SKU: TS924IN
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS924IN

Manufacturer:: STMicroelectronics

Category:: Instrumentation, Op Amps, Buffer Amps

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

Datasheet:: TS924IN.pdf

Description:: IC OPAMP GP 4 CIRCUIT 14DIP

Quantity:: RFQ Add To RFQ list

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Inventory:2,919

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Product details

Overview

TS924IN from STMicroelectronics is a rail-to-rail input/output quad BiCMOS operational amplifier optimized for 3 V and 5 V battery-powered audio systems. It delivers 80 mA output current, 4 MHz gain-bandwidth product, 1.3 V/µs slew rate, 9 nV/√Hz input noise, and operates from 2.7 V to 12 V supply. Used in headphone amplifiers and piezoelectric speaker drivers where low distortion (0.005% THD) and high channel separation (120 dB) are critical.

For engineers reviewing the TS924IN datasheet, TS924IN pinout, TS924IN application, or TS924IN equivalent, this page provides verified electrical specifications, SO14 package details, rail-to-rail performance context, thermal and ESD ratings (3 kV HBM), and real-world audio system integration guidance - all confirmed against ST's production datasheet DocID5065 Rev 11.

Technical Context

The TS924IN uses a BiCMOS input stage enabling rail-to-rail common-mode input range (V_CC– – 0.2 V to V_CC+ + 0.2 V) and rail-to-rail output swing within 100 mV of rails at 32 Ω load. Its 4 MHz GBP and 68° phase margin ensure stability with capacitive loads up to 500 pF without external compensation.

It features low input offset voltage (≤1.8 mV max for TS924A variant), 2 µV/°C drift, and 15–100 nA input bias current. The 80 mA short-circuit output current enables direct driving of 32 Ω headphones and piezo elements without external buffers, while 9 nV/√Hz noise supports high-fidelity signal paths.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2.7 V to 12 V - supports single-supply portable systems (3 V, 5 V) and higher-voltage line-powered designs.
Gain Bandwidth Product	4 MHz - enables stable unity-gain buffer and gain-of-10 configurations up to ~400 kHz with adequate phase margin.
Slew Rate	1.3 V/µs - sufficient for 2 V_pk-pk signals at 100 kHz without slew-induced distortion in audio paths.
Output Current	80 mA - drives 32 Ω loads to ±2.6 V swing at 3 V supply, eliminating need for external power stages in headphone amps.
Input Noise Density	9 nV/√Hz at 1 kHz - preserves SNR in low-level preamp and microphone interface stages.
THD + Noise	0.005 % at 1 kHz, 2 V_pk-pk, R_L = 600 Ω - meets high-fidelity audio requirements for consumer multimedia boards.
Channel Separation	120 dB - prevents crosstalk between stereo channels in compact quad-amplifier layouts.

Pinout & Package

TS924IN is supplied in SO14 (plastic small outline) package per JEDEC MS-012, with 1.27 mm pitch, 8.75 mm × 4.0 mm body, and 1.75 mm height. Pin 1 is marked by notch or dot; top view orientation matches standard SOIC layout.

Pin/Terminal	Circuit Role	Design Meaning
1, 5, 9, 13	Inverting Input (A, B, C, D)	Differential input node for each op-amp; accepts rail-to-rail common-mode voltage.
2, 6, 10, 14	Non-inverting Input (A, B, C, D)	Differential input node; matched bias current minimizes offset error in precision configurations.
3, 7, 11, 12	Output (A, B, C, D)	Rail-to-rail output capable of sourcing/sinking 80 mA; stable with ≤500 pF capacitive load.
4	V_CC+	Positive supply rail; must be decoupled locally with ≥100 nF ceramic capacitor.
8	V_CC–	Negative supply rail (GND in single-supply); shared return path for all four amplifiers.

Key Features

Feature	Design Value
Rail-to-rail I/O	Input common-mode range extends 0.2 V beyond rails; output swings within 100 mV of V_CC+/V_CC– at 32 Ω, enabling full dynamic range in low-voltage systems.
High Output Drive	80 mA continuous per amplifier allows direct connection to 32 Ω headphones and piezo transducers without external boost stages.
Low Noise & Distortion	9 nV/√Hz input noise and 0.005 % THD at 1 kHz preserve signal integrity in audio front-ends and active filters.
Capacitive Load Stability	Stable with up to 500 pF load capacitance - eliminates need for isolation resistors when driving cables or ADC inputs.
ESD Robustness	3 kV HBM rating protects against handling damage during PCB assembly and field service in consumer electronics.

Applications

Headphone Amplifier

Piezoelectric Speaker Driver

Use Scenario: Driving stereo 32 Ω dynamic headphones from a 3.3 V microcontroller DAC output in portable media players.

IC Role / Device Role / Timing Role: Quad op-amp configured as two independent stereo line drivers with rail-to-rail output swing and low THD.

Use Value: Delivers >2 V_pk-pk into 32 Ω at 3 V supply without clipping, achieving >105 dB SNR using only internal amplification.

Use Scenario: Generating high-voltage, low-current drive signals for ultrasonic piezo buzzers in smart home sensors.

IC Role / Device Role / Timing Role: Single amplifier used in non-inverting configuration with gain ≥10 to boost DAC output to ±2.5 V swing.

Use Value: 80 mA output capability ensures fast piezo actuation rise time (<5 µs) without external MOSFET buffering.

Sound Card Line Driver

MPEG Board Audio Buffer

Use Scenario: Isolating and level-shifting analog audio outputs on PC sound cards before connector termination.

IC Role / Device Role / Timing Role: Quad op-amp deployed as four independent unity-gain buffers for L/R line-out and mic-in/mic-out paths.

Use Value: 120 dB channel separation prevents left/right crosstalk; rail-to-rail I/O maintains full 2 V_pk-pk signal swing across 0–3.3 V logic domain.

Use Scenario: Conditioning decoded PCM audio streams on MPEG decoder boards before feeding to DAC or codec ICs.

IC Role / Device Role / Timing Role: Two amplifiers used as anti-aliasing and reconstruction filters; remaining pair as DC-blocking AC-coupled buffers.

Use Value: 4 MHz GBP supports filter cutoffs up to 200 kHz; low 2 µV/°C offset drift maintains DC accuracy over industrial temperature range.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TS924IPT	TSSOP14 package (5.0 mm × 6.4 mm), thinner profile, finer 0.65 mm pitch - requires reflow-compatible layout.	Better suited for space-constrained portable PCBs; thermal resistance higher (100 °C/W vs. 66 °C/W for SO14).	Select when board area is limited and automated assembly supports fine-pitch TSSOP; verify thermal derating at 80 mA load.
TS924AID	Enhanced input offset voltage (≤900 µV max vs. ≤1.8 mV for TS924IN), same SO14 package and pinout.	Preferred for precision DC-coupled instrumentation paths where offset error directly impacts measurement accuracy.	Choose for sensor signal conditioning or medical-grade audio front-ends requiring sub-mV offset; otherwise TS924IN offers identical AC performance at lower cost.

Compared with TS924IPT, TS924IN offers superior thermal performance and easier hand-soldering; compared with TS924AID, it trades 0.9 mV higher offset for broader availability and lower unit cost - making TS924IN optimal for general-purpose audio buffering where AC fidelity dominates DC accuracy.

Availability

TS924IN is available at Aetrix Electronics and suitable for headphone amplifiers, piezoelectric driver circuits, and MPEG board audio buffering requiring stable component supply across industrial temperature range (–40 °C to +125 °C) and long-lifecycle production.

Supply support for TS924IN 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, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.

The TS92x series was developed specifically for low-voltage, high-fidelity audio signal conditioning - emphasizing rail-to-rail operation, low noise, and robust output drive in compact packages for portable and multimedia applications.

FAQ

Is TS924IN pin-compatible with TS924IPT?

Yes - both share identical pin numbering and functional assignment across all 14 pins. The only difference is package geometry: TS924IN uses SO14 (8.75 mm × 4.0 mm), while TS924IPT uses TSSOP14 (5.0 mm × 6.4 mm). PCB footprint and schematic symbols must be updated for pitch (1.27 mm vs. 0.65 mm) and thermal pad presence.

What is the maximum safe capacitive load for TS924IN without external compensation?

TS924IN remains unconditionally stable with capacitive loads up to 500 pF, as verified in ST's datasheet Figure 3 and Table 3. Loads exceeding 500 pF - such as long coaxial cables or high-C_IN ADCs - require a series isolation resistor (typically 10–47 Ω) between output and load to maintain phase margin above 60°.

Does TS924IN support true split-rail operation (e.g., ±2.5 V)?

Yes - TS924IN operates with dual supplies from ±1.35 V to ±6 V (i.e., total supply 2.7 V to 12 V). In ±2.5 V configuration, its rail-to-rail input accepts V_IN from –2.7 V to +2.7 V, and output swings within 100 mV of ±2.5 V rails, enabling symmetric signal handling in professional audio line receivers.

How does TS924IN's 80 mA output current translate to practical load capability?

At 3 V supply, TS924IN delivers ±2.63 V output into 32 Ω (per datasheet Table 3), yielding 82 mW per channel - sufficient for loud headphone playback. At 5 V, it sustains ±4.4 V into 32 Ω (193 mW), supporting higher-SPL transducers. Continuous 80 mA operation requires PCB copper area ≥1 cm² under pin 4/8 and ambient <70 °C.

TS924IN Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

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

Packaging:: Tube

Product Status:: Obsolete

Amplifier Type:: General Purpose

Number of Circuits:: 4

Output Type:: Rail-to-Rail

Slew Rate:: 1.3V/µs

Gain Bandwidth Product:: 4 MHz

-3db Bandwidth:: -

Current - Input Bias:: 15 nA

Voltage - Input Offset:: 3 mV

Current - Supply:: 1mA

Current - Output / Channel:: 80 mA

Voltage - Supply Span (Min):: 2.7 V

Voltage - Supply Span (Max):: 12 V

Operating Temperature:: -40°C ~ 125°C

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Through Hole

Supplier Device Package:: 14-DIP

TS924IN FAQ

1.How can I place an order for TS924IN through Aetrix?

Please submit a Request for Quotation (RFQ) for TS924IN 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 TS924IN reliable?

The price and inventory of TS924IN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS924IN is usually 5 days.

3.What payment methods are accepted for TS924IN?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS924IN transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS924IN?

TS924IN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS924IN 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 TS924IN?

For technical support, including TS924IN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS924IN requirements.

6.How does Aetrix verify that TS924IN is sourced from the original manufacturer or authorized distributors?

All TS924IN 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 TS924IN meets industry standards.

7.What is the process for return or replacement of TS924IN?

All TS924IN units undergo pre-shipment inspection (PSI). If there is an issue with TS924IN, 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 TS924IN part is unused and in its original packaging.

Return procedure for TS924IN:

1.Submit a request within 90 days.

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

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