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Home > Products > Integrated Circuits (ICs) > Linear > Audio Amplifiers

STMicroelectronics TS487IDT

Name: TS487IDT
Brand: STMicroelectronics
SKU: TS487IDT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TS487IDT

Manufacturer:: STMicroelectronics

Category:: Audio Amplifiers

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: TS487IDT.pdf

Description:: IC AMP CLASS AB STEREO 108MW 8SO

Quantity:: RFQ Add To RFQ list

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Inventory:2,712

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Product details

Overview

TS487IDT from STMicroelectronics is a dual-channel, unity-gain stable audio power amplifier designed for stereo headphone drive in low-voltage portable systems. It delivers 102mW per channel into 16Ω at 5V (0.1% THD+N), operates from 2V to 5.5V, features active-high standby control, and achieves 103dB(A) SNR and 83dB crosstalk rejection at 1kHz.

For engineers reviewing the TS487IDT datasheet, TS487IDT pinout, TS487IDT application, or TS487IDT equivalent, this device is selected for ultra-low-power audio output stages requiring high PSRR (58dB), click/pop suppression, short-circuit protection, and compatibility with 16–32Ω headset loads in space-constrained mobile designs.

Technical Context

The TS487IDT implements a dual rail-to-rail output Class-AB architecture with externally configurable gain via feedback resistors or fixed-gain variants (x1/0dB, x2/6dB, x4/12dB). Its standby mode reduces quiescent current to 10nA (typ.) when SHUTDOWN is pulled high - distinct from the TS486's active-low control.

It integrates on-chip bypass filtering (BYPASS pin), supports single-supply operation with internal biasing, and maintains stability without external compensation due to unity-gain design. Input offset voltage is ≤1mV, and slew rate is 0.4V/µs into 16Ω.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2V to 5.5V - enables direct integration with Li-ion battery (3.0–4.2V) or 3.3V/5V system rails without LDO.
Output Power	102mW @ 5V into 16Ω (0.1% THD+N) - sufficient for loud, low-distortion stereo headphone playback.
Quiescent Current	2.5mA max - minimizes battery drain during active audio playback in portable devices.
Standby Current	10nA typ. when SHUTDOWN = VCC - extends shelf life and idle runtime in always-on audio subsystems.
Signal-to-Noise Ratio	103dB(A) @ 5V - ensures high-fidelity audio reproduction with negligible background noise.
Crosstalk Rejection	83dB @ 1kHz - prevents audible channel bleed in stereo headphone applications.
PSRR	58dB @ 1kHz - suppresses supply ripple interference without requiring ultra-clean LDOs.

Pinout & Package

TS487IDT is housed in an SO8 (Small Outline 8-pin) package with standard 1.27mm pitch, suitable for automated PCB assembly and thermal management in compact audio modules.

Pin/Terminal	Circuit Role	Design Meaning
1: BYPASS	Internal bias reference filter node	Connects to 2.2µF capacitor to ground to stabilize internal V_REF and reduce noise coupling.
2: GND	Analog and power ground reference	Common return path for both channels; requires low-impedance connection to PCB ground plane.
3: SHUTDOWN	Active-high enable control input	Pull high to V_CC to activate amplifier; pull low to disable and enter 10nA standby mode.
4: V_CC	Positive supply input	Accepts 2–5.5V; decoupling capacitor (100nF) required near pin for PSRR optimization.
5: OUT(2)	Channel 2 output driver	Rail-to-rail output capable of ±2.25V swing into 16Ω @ 5V; drives right-channel headphone transducer.
6: OUT(1)	Channel 1 output driver	Identical to OUT(2); drives left-channel headphone transducer with matched performance.
7: IN(2)	Inverting input for channel 2	Accepts differential or single-ended audio signal; used with R_FEED/R_IN for gain setting (external version).
8: IN(1)	Inverting input for channel 1	Independent input path; supports stereo signal routing without inter-channel coupling.

Key Features

Feature	Design Value
Unity-gain stable architecture	Eliminates need for external compensation components, reducing BOM count and layout complexity.
ON/OFF click reduction circuitry	Minimizes audible transients during power-up/down transitions, critical for consumer audio user experience.
Short-circuit limitation	Internally limits output current to ~115mA (5V), protecting IC and load during accidental shorts to V_CC or GND.
High PSRR (58dB @ 1kHz)	Allows direct connection to noisy system rails (e.g., shared 3.3V domain), reducing need for dedicated audio LDOs.
Low THD+N (0.3% max over audio band)	Ensures clean amplification across 20Hz–20kHz, meeting fidelity requirements for premium portable audio.

Applications

Mobile Headphone Interface

USB-C Audio Adapter

Use Scenario: Driving stereo headphones from a smartphone baseband processor's line-out or DAC output.

IC Role / Device Role / Timing Role: Final-stage audio power amplifier providing gain, drive capability, and DC blocking for 16–32Ω loads.

Use Value: Delivers 102mW/channel at 5V with <0.1% THD+N and 103dB SNR, enabling loud, low-noise playback without external regulators.

Use Scenario: Embedded audio codec in USB-C dongles converting digital USB audio to analog 3.5mm output.

IC Role / Device Role / Timing Role: Dual-channel analog output buffer with integrated standby control synchronized to USB suspend/resume.

Use Value: 10nA standby current extends dongle battery life; SO8 footprint fits tight mechanical envelopes under USB-C shells.

Smart Speaker Auxiliary Output

Industrial Handheld Terminal Audio

Use Scenario: Providing private headphone monitoring output alongside main speaker driver in voice-assistant speakers.

IC Role / Device Role / Timing Role: Low-noise, isolated stereo amplifier channel decoupled from main Class-D speaker path.

Use Value: 83dB crosstalk rejection prevents speaker audio leakage into headphone output; 2V min supply supports brownout resilience.

Use Scenario: Voice prompt and alert playback in ruggedized handheld terminals operating from 3.3V or 5V rails.

IC Role / Device Role / Timing Role: Robust audio output stage tolerant of industrial temperature range (−40°C to +85°C) and ESD stress (1.5kV HBM).

Use Value: Guaranteed operation down to 2V allows continued audio function during battery sag; SO8 package withstands reflow and mechanical shock.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel headphone amplifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX98304EASA+	Higher output power (125mW @ 5V/16Ω), but requires external shutdown logic and lacks integrated click suppression.	Better suited for high-volume OEM production where discrete control is already present; less ideal for rapid prototyping.	Select if >102mW output or I²C configurability is required; verify external mute timing against MAX98304's 1ms turn-on delay.
TAS5707PAP	Digital-input Class-D stereo amplifier with integrated DSP; no analog inputs or standby pin - fundamentally different architecture.	Targets systems with digital audio sources (I²S) and demand higher efficiency (>90%), not analog-line-in headphone drive.	Not a functional substitute; only consider when redesigning from analog to digital audio architecture and accepting larger QFN48 footprint.

Compared with MAX98304EASA+ and TAS5707PAP, the TS487IDT offers superior integration for analog-source portable audio - combining active-high standby, click suppression, unity-gain stability, and SO8 manufacturability in a single 2–5.5V solution - whereas alternatives trade simplicity for power, efficiency, or digital interface capability.

Availability

TS487IDT is available at Aetrix Electronics and suitable for mobile phone audio subsystems, USB-C audio adapters, smart speaker auxiliary outputs, and industrial handheld terminal designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TS487IDT 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 specializing in analog, power, and microcontroller solutions for automotive, industrial, and consumer markets.

The TS487IDT belongs to ST's audio power amplifier product line, engineered specifically for ultra-low-voltage, low-noise stereo headphone drive in battery-powered portable electronics - emphasizing standby efficiency, THD+N performance, and ease of integration.

FAQ

What is the minimum supply voltage for reliable operation of TS487IDT?

The TS487IDT is fully specified down to 2.0V supply voltage, delivering 12mW per channel into 16Ω at 2V (0.3% THD+N, 1kHz). Operation below 2V is not guaranteed; output swing degrades progressively, and THD+N rises above specification limits below this threshold.

Can TS487IDT drive 32Ω headphones effectively?

Yes - at 5V supply, it delivers 64mW per channel into 32Ω with 0.1% THD+N, and 95mW at 1% THD+N. At 3.3V, output is 26mW (0.1% THD+N) and 36mW (1% THD+N), sufficient for most 32Ω earbuds and compact headphones requiring moderate volume levels.

Is external gain-setting required for TS487IDT?

No - TS487IDT is the base part number for the externally configurable version, but fixed-gain variants exist (e.g., TS487-1IST = 0dB, TS487-2IST = 6dB). The IDT suffix indicates SO8 packaging of the base external-gain variant, requiring R_IN/R_FEED resistors unless replaced by a fixed-gain derivative.

Does TS487IDT require output coupling capacitors?

Yes - because it uses a single-supply, ground-referenced input architecture, AC-coupling capacitors (e.g., 220µF) are mandatory between each OUT pin and the headphone load to block DC offset and prevent transducer damage or audible thumps.

TS487IDT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Type:: Class AB

Output Type:: Headphones, 2-Channel (Stereo)

Max Output Power x Channels @ Load:: 108mW x 2 @ 16Ohm

Voltage - Supply:: 2V ~ 5.5V

Features:: Depop, Short-Circuit Protection, Standby

Mounting Type:: Surface Mount

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Supplier Device Package:: 8-SOIC

TS487IDT FAQ

1.How can I place an order for TS487IDT through Aetrix?

Please submit a Request for Quotation (RFQ) for TS487IDT 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 TS487IDT reliable?

The price and inventory of TS487IDT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TS487IDT is usually 5 days.

3.What payment methods are accepted for TS487IDT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TS487IDT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TS487IDT?

TS487IDT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TS487IDT 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 TS487IDT?

For technical support, including TS487IDT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TS487IDT requirements.

6.How does Aetrix verify that TS487IDT is sourced from the original manufacturer or authorized distributors?

All TS487IDT 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 TS487IDT meets industry standards.

7.What is the process for return or replacement of TS487IDT?

All TS487IDT units undergo pre-shipment inspection (PSI). If there is an issue with TS487IDT, 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 TS487IDT part is unused and in its original packaging.

Return procedure for TS487IDT:

1.Submit a request within 90 days.

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

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